How to Fill Out New York Form WCB MG-2.1 (w/Examples) + FAQs

New York Form WCB MG-2.1 is the Attending Doctor’s Request for Approval of Variance and Carrier’s/Employer’s Response, the document a treating medical provider files with the New York State Workers’ Compensation Board when proposed care falls outside the Medical Treatment Guidelines (MTGs). The form is governed by 12 NYCRR Part 324 and Section 13-a of the Workers’ Compensation Law, and missing one box can cost a patient weeks of needed treatment.

The current revision date stamped on the form is 2-10, and the WCB has migrated nearly all submissions to the OnBoard: Limited Release portal. New York processes more than 140,000 medical authorization requests every year, and the WCB reports that roughly 30% of variance requests are denied on procedural grounds, not medical ones — meaning the form itself, not the care, is the problem.

• 🩺 How to complete every box on Form MG-2.1 line by line.
• 📑 Which records and prior authorizations must travel with the form.
• ⏱️ Exact response deadlines for the carrier and the consequences of silence.
• 💻 Step-by-step OnBoard, mail, and fax filing instructions.
• ⚖️ How to win a variance dispute when the carrier objects.

What Form MG-2.1 Is and Who Must File It

Form MG-2.1 is the official document a treating provider uses to ask a workers’ compensation insurance carrier or self-insured employer to approve care that the Medical Treatment Guidelines do not allow as a matter of right. The MTGs cover the mid-and-low back, neck, shoulder, knee, carpal tunnel, non-acute pain, occupational asthma, PTSD, and other body parts and conditions. When a doctor wants to step outside those guidelines — more visits than the cap, a different modality, or a longer course of opioids — the doctor files MG-2.1.

Only the attending medical provider may file MG-2.1. The injured worker cannot file it, the attorney cannot file it, and a consulting independent medical examiner cannot file it. The provider must be authorized by the WCB under WCL §13-a and must be the treating professional with primary clinical responsibility for the body part at issue.

The form serves three purposes at once. It tells the carrier what is being requested, it documents the medical necessity in the provider’s own words, and it gives the carrier a structured place to grant or deny the variance. The carrier’s denial or silence opens the door to a hearing before a Workers’ Compensation Law Judge under 12 NYCRR §324.3.

Federal programs interact with MG-2.1 in narrow ways. A Medicare Set-Aside (MSA) review may pull the variance history when projecting future care, and federal employees under FECA do not use this form because they fall under the U.S. Department of Labor system. Inside New York, however, MG-2.1 is the only path to authorize non-guideline care for state-jurisdiction claims.

Before You Start: Documents and Information You Need

A clean MG-2.1 begins long before you open the PDF. Gather every supporting record first, because the carrier may deny the variance for any gap, and the WCB will not waive a missing attachment.

• WCB case number (the seven-digit G number). Without it the form lands in the wrong file and stalls for weeks.
• Date of injury. The MTGs in force on the date of injury control, so an old claim may follow older guidelines.
• Claimant’s full legal name, address, date of birth, and Social Security number. A name mismatch with the WCB index triggers a system rejection.
• Carrier or self-insured employer name, WCB carrier code, and claim number. The WCB carrier code lookup is the only reliable source.
• Provider WCB authorization number and NPI. The board cross-checks both before processing.
• The exact MTG section the variance departs from. Cite it by chapter, section, and bullet.
• Most recent progress notes, imaging, and functional measures. Pain scales, range-of-motion numbers, and ADL limits anchor the medical opinion.
• Prior MG-2 or MG-2.1 decisions on the same body part. The carrier needs the chain of authorizations to evaluate the new request.
• Statement of medical necessity in the provider’s own words. Generic language is the leading cause of denial.
• Claimant’s signed acknowledgment that they understand and agree to the proposed care. The signature box is not optional.

Missing any one of these items is grounds for the carrier to deny under the burden-of-proof standard in 12 NYCRR §324.3(a)(2). The provider then has to refile, and the patient waits.

Where to Get the Form and How to Access It

The only authoritative copy of MG-2.1 lives on the WCB forms library. Downloading from a third-party legal site risks pulling an outdated revision, and the WCB will reject any version that does not match the current 2-10 revision in the footer.

Most providers no longer use the PDF at all. Since 2022 the WCB has required prior authorization requests, including variances, to be submitted through OnBoard: Limited Release, the board’s secure web portal. OnBoard pre-populates the claim header, validates the carrier code in real time, and routes the request to the correct adjuster automatically.

Providers who are not yet onboarded to OnBoard may still file the paper MG-2.1 in narrow situations, such as a system outage or a claim that predates electronic filing. Paper filers should print the form on white 8.5 × 11 paper, complete it in black ink or typed text, and keep a stamped copy for their records. Faxing is accepted only when the carrier has published a dedicated fax line for medical authorizations on the WCB carrier directory.

The form is free. There is no filing fee, no copy fee, and no charge for OnBoard access. The cost of getting it wrong, however, is real: a denied variance can delay surgery, physical therapy, or pain management by 30 to 60 days while the matter moves to a hearing.

Step-by-Step: How to Fill Out Form MG-2.1 Line by Line

Form MG-2.1 has a header block, four lettered sections (A through E), a claimant acknowledgment, a provider certification, and a carrier response block on the back. Every field below maps to the printed form. Use the exact labels and box numbers as they appear on the WCB version.

Header: WCB Case Number, Carrier Case Number, and Date of Accident

The header sits at the top of page one and identifies the claim.

The form asks for the WCB Case Number, the Carrier Case Number, and the Date of Accident. Enter the seven-digit WCB case number with the leading G (for example, G1234567), the carrier’s internal claim number exactly as it appears on the carrier’s correspondence, and the date of accident in MM/DD/YYYY format.

A specific example: orthopedic surgeon Dr. Elena Park enters G2845013, NYWC-887412-A, and 04/12/2024 for her patient Marcus Reed, who fell from a scaffold.

A common nuance arises when the claim has both a controverted and an established case number. Always use the established number, never the controverted one, because the controverted number is closed once the case is established.

The most frequent mistake here is dropping the leading G or transposing two digits. The consequence is that OnBoard rejects the submission outright and the provider sees a red error banner with no claim match.

A persistent misconception is that the carrier case number is optional. It is not — the carrier uses it to route the request to the right adjuster, and a blank box can add a week to the response timeline.

Section A: Claimant Information

Section A captures the injured worker’s identifying data.

Enter the claimant’s full legal name (last, first, middle initial), street address with apartment number, city, state, ZIP, date of birth in MM/DD/YYYY, Social Security number, and daytime phone. Use the name on file with the WCB, not a nickname or maiden name.

For example, Marcus Reed’s entry reads Reed, Marcus J., 418 Linden Ave., Apt 3B, Yonkers, NY 10701, 07/22/1986, 123-45-6789, (914) 555-0142.

A nuance: if the claimant uses a P.O. Box for mail but lives at a different street address, list the street address here and note the P.O. Box in Section E or in a cover letter. The WCB uses the street address for jurisdictional purposes.

The most common mistake is entering a married name when the claim was filed under a maiden name. The consequence is a mismatch in the WCB index and a delayed match-and-route.

A common misconception is that the SSN is optional under privacy rules. It is required on this form because the WCB cross-references claims by SSN, and a blank field returns the form for completion.

Section B: Employer and Insurance Carrier Information

Section B identifies the responsible payer.

Enter the employer’s legal name, the insurance carrier’s legal name, and the carrier’s three- or four-digit WCB carrier code. The WCB carrier lookup is the source of truth for the code.

For Marcus Reed’s claim, Dr. Park enters Apex Scaffold Corp., State Insurance Fund, and code W001000.

A nuance applies to self-insured employers and group self-insured trusts. They use a code beginning with Z or T, not W, and the third-party administrator’s name goes in the carrier line, not the employer line.

A frequent mistake is using the broker’s name instead of the carrier’s legal name. The consequence is that the variance request lands at the wrong company and the eight-business-day response clock never starts.

A misconception is that the WCB carrier code is the same as the policy number. It is not — the policy number is private to the employer, while the carrier code is a public WCB identifier.

Section C: Treating Medical Provider Information

Section C identifies the provider asking for the variance.

Enter the provider’s full name and credential (MD, DO, DC, DPM, etc.), WCB authorization number, NPI, office address, phone, fax, and email. The WCB authorization number and NPI must both match the WCB Health Provider Search.

For example, Dr. Park enters Elena Park, MD, WCB authorization MD012345, NPI 1457893021, 200 Hospital Rd., Suite 410, Yonkers, NY 10704, phone (914) 555-0900, fax (914) 555-0901, email epark@apexortho.com.

A nuance applies to providers practicing in a group. List the individual provider’s WCB authorization number, not the group’s tax ID, because variances are tied to the treating clinician.

The most common mistake is leaving the fax or email blank. The consequence is that the carrier cannot send a same-day approval and falls back to mailing a denial that arrives after the deadline has run.

A misconception is that any licensed New York physician may file MG-2.1. Only WCB-authorized providers may, and an unauthorized provider’s request is denied without review.

Section D: Burden of Proof — Why a Variance Is Needed

Section D is where most variances are won or lost.

The provider must check one of four boxes explaining why a variance is needed and write a narrative supporting the choice. The four options are: (1) the MTG recommendation is contraindicated for this patient, (2) the recommendation has been tried and failed, (3) an alternative treatment is at least as effective and more appropriate, or (4) the existing MTGs do not address the condition.

For example, Dr. Park checks box 2 for Marcus and writes: Patient completed 12 PT sessions per MTG cap with VAS pain 7/10 and limited shoulder ROM at 90° abduction. Additional 8 sessions with manual therapy expected to restore functional reach for return-to-work as a roofer.

A nuance: the provider must cite the specific MTG section being departed from, by chapter and bullet, in this narrative. Shoulder MTG D.3.b is more credible than a generic reference to “the shoulder guidelines.”

The most common mistake is checking a box without explaining the clinical reasoning. The consequence is a denial under 12 NYCRR §324.3(a)(2) for failure to meet the burden of proof, even when the underlying care is reasonable.

A widespread misconception is that quoting medical literature is enough. It is not — the provider must connect the literature to this patient’s findings, history, and functional goals.

Section E: Medical Opinion Supporting the Variance

Section E is the clinical core of the form.

Describe the variance being requested in plain English: the modality, the number of visits, the medication and dose, the surgical procedure, or the diagnostic test. Include CPT codes where applicable, expected duration, and measurable goals.

For example, Dr. Park writes: Request 8 additional PT sessions, CPT 97110 and 97140, 2x/week for 4 weeks, goal: shoulder abduction ≥150° and return to medium-duty work by 09/15/2024.

A nuance applies to opioid variances under the Non-Acute Pain MTG. The provider must include the morphine milligram equivalent (MME) per day, the most recent urine drug screen result, the CDC risk assessment, and a written pain agreement.

The most common mistake is asking for an open-ended course of care. The consequence is a denial because the carrier cannot evaluate medical necessity without a defined endpoint.

A misconception is that a variance can be requested retroactively for care already given. It cannot — variances are prospective, and care delivered before approval is the provider’s financial risk under WCB Subject No. 046-959.

Claimant Acknowledgment and Signature

The claimant signs to confirm informed consent.

The injured worker prints their name, signs, and dates the acknowledgment line, confirming they understand the proposed variance and agree to receive the care. The signature must be original ink on a paper form or a verified e-signature in OnBoard.

For example, Marcus Reed prints Marcus J. Reed, signs, and dates 07/01/2024.

A nuance: a claimant who cannot read English may have a translator sign on their behalf, but the translator’s name, address, and language must be written next to the signature.

The most common mistake is the provider signing for the patient or pre-dating the form. The consequence is a fraud referral under WCL §114-a and possible loss of WCB authorization.

A misconception is that the patient’s signature waives the right to dispute a denial. It does not — the patient retains the right to a hearing regardless of what they signed here.

Provider Certification and Signature

The provider certifies the request is true and complete.

The treating provider signs, dates, and prints their name and credential, certifying under penalty of perjury that the medical information is accurate and that the variance is medically necessary.

For example, Dr. Park prints Elena Park, MD, signs, and dates 07/01/2024.

A nuance: the signature must be the treating provider’s, not a physician assistant’s or nurse practitioner’s, unless that mid-level is the WCB-authorized treating provider on the case.

The most common mistake is using a stamped or scanned signature on a paper form. The consequence is a procedural denial because 12 NYCRR §324.3 requires an original signature on paper submissions.

A misconception is that an office manager may sign for the doctor. They may not — the certification is a personal medical-legal attestation.

Carrier/Employer Response Block (Back of Form)

The carrier completes the back of the form.

The carrier checks one of three boxes — Approved, Approved in Part, or Denied — and provides the reason, the responding adjuster’s name and credential (including any required medical professional review), date, and signature. If denied, the carrier must state whether the denial is based on burden of proof or on the medical merits.

For example, claims adjuster Karen Liu, RN, BSN of the State Insurance Fund checks Approved and writes Approved 8 sessions through 09/15/2024.

A nuance: a denial on medical merits must be supported by a conflicting medical opinion from a provider of the same or higher specialty. A bare denial without a peer review is procedurally defective.

The most common carrier mistake is responding after the deadline. The consequence under 12 NYCRR §324.3(d) is automatic approval — the variance is granted by operation of law.

A misconception is that the carrier can ask for an extension. It cannot extend unilaterally; it must request an IME and notify the WCB within five business days, or the deadline runs.

Three Filled-Out Examples Using Real Scenarios

The three scenarios below show how providers in different specialties complete the form for typical variance requests.

Scenario 1: Dr. Elena Park, Orthopedic Surgeon — Extra PT Visits

Marcus Reed, a 38-year-old roofer, fell from a scaffold and tore his right rotator cuff. He completed the MTG-allowed 12 PT visits but still cannot reach overhead.

Form Section	What Dr. Park Enters
WCB Case Number	G2845013
Date of Accident	04/12/2024
Section A — Claimant	Reed, Marcus J., 418 Linden Ave., Apt 3B, Yonkers, NY 10701, DOB 07/22/1986
Section B — Carrier	State Insurance Fund, code W001000
Section C — Provider	Elena Park, MD, WCB MD012345, NPI 1457893021
Section D — Burden of Proof	Box 2 checked: MTG cap tried and failed; VAS 7/10, abduction 90°
Section E — Medical Opinion	8 additional PT visits, CPT 97110/97140, goal abduction ≥150°
Claimant Signature	Marcus J. Reed, 07/01/2024
Provider Signature	Elena Park, MD, 07/01/2024

Scenario 2: Dr. Samuel Greene, Pain Management — Opioid Continuation

Janet Alvarez, a 52-year-old home health aide, has chronic low back pain after a 2019 lifting injury. The Non-Acute Pain MTG caps chronic opioid therapy, but Janet has failed three weans.

Form Section	What Dr. Greene Enters
WCB Case Number	G1992441
Date of Accident	11/03/2019
Section A — Claimant	Alvarez, Janet R., 77 Park Pl., Bronx, NY 10453, DOB 02/14/1973
Section B — Carrier	Travelers Indemnity, code W123400
Section C — Provider	Samuel Greene, MD, WCB MD556677, NPI 1928374650
Section D — Burden of Proof	Box 2 checked: three documented weans failed; function declined
Section E — Medical Opinion	Continue oxycodone 10 mg QID, 40 MME/day, UDS 06/14/2024 consistent, pain agreement on file
Claimant Signature	Janet R. Alvarez, 06/28/2024
Provider Signature	Samuel Greene, MD, 06/28/2024

Scenario 3: Dr. Aisha Patel, Chiropractor — Extended Care for Chronic Low Back

Carlos Medina, a 45-year-old warehouse worker, has chronic mechanical low back pain. The Mid-and-Low Back MTG limits maintenance care, but Carlos’s function deteriorates without monthly visits.

Form Section	What Dr. Patel Enters
WCB Case Number	G2510882
Date of Accident	08/19/2022
Section A — Claimant	Medina, Carlos A., 1209 Grand Concourse, Bronx, NY 10456, DOB 05/30/1979
Section B — Carrier	Hartford Underwriters, code W045600
Section C — Provider	Aisha Patel, DC, WCB DC223344, NPI 1029384756
Section D — Burden of Proof	Box 3 checked: maintenance chiropractic more appropriate than alternative
Section E — Medical Opinion	1 visit/month for 6 months, CPT 98941, goal Oswestry ≤30
Claimant Signature	Carlos A. Medina, 05/15/2024
Provider Signature	Aisha Patel, DC, 05/15/2024

A fourth named filer worth knowing is psychologist Dr. Lena Ortiz, who files MG-2.1 to extend PTSD therapy beyond the PTSD MTG cap for a transit worker. A fifth is podiatrist Dr. Henry Cho, who requests a custom orthotic outside the foot guidelines for a postal carrier.

How to File the Completed Form

The WCB accepts MG-2.1 through three channels. Providers should default to OnBoard unless a specific exception applies.

OnBoard: Limited Release portal. Log in at onboard.wcb.ny.gov, select Prior Authorization Request, choose Variance — MG-2.1, complete the digital form, attach supporting records as PDFs, and submit. There is no fee. Processing begins the same business day, the carrier has 8 business days to respond (15 if it elects an IME or a peer review on burden-of-proof grounds), and the system generates a confirmation receipt the provider should save as proof of filing.

Mail. Send the original signed form and attachments to the carrier at the address listed on the WCB carrier directory, with a copy to the WCB Centralized Mailing, PO Box 5205, Binghamton, NY 13902-5205. There is no fee. Processing time runs 8 business days from the carrier’s receipt, and the provider should mail by USPS certified mail with return receipt as proof of filing.

Fax. Fax the signed form and attachments to the carrier’s published medical authorization fax line, with a copy faxed to the WCB district office covering the claimant’s county. There is no fee. The 8-business-day clock runs from the carrier’s receipt, and the fax confirmation page is the provider’s proof of filing.

In-person filing at a WCB district office is allowed but rarely used. The clerk will date-stamp a copy as proof of filing at no charge.

What Happens After You File

Once the carrier receives MG-2.1, the response clock starts. Under 12 NYCRR §324.3(d), the carrier has 8 business days to approve, approve in part, or deny on the medical merits, and 15 business days if it asserts the provider failed the burden of proof and obtains a conflicting opinion from a same-or-higher-specialty reviewer.

If the carrier approves, the provider may begin care immediately and bill under the standard WCB medical fee schedule. If the carrier denies, the provider or the claimant may request expedited review, and the matter is set down for a hearing before a Workers’ Compensation Law Judge, often within 30 days.

If the carrier does not respond within the deadline, the variance is automatically approved by operation of law. The provider should file a copy of the original MG-2.1 with proof of service and a short cover letter to the WCB to confirm the default approval and avoid a billing dispute.

A common after-filing surprise is that the carrier issues a denial citing an IME report it obtained without first notifying the WCB. That denial is procedurally defective, and the provider should raise the defect at the hearing under WCB Subject No. 046-432.

Mistakes to Avoid When Filling Out the Form

Most denied variances trace back to a fixable form-level error rather than a weak clinical case.

• Leaving the WCB case number blank or wrong: the form cannot be matched and is auto-rejected.
• Using a maiden name instead of the indexed name: the WCB returns the form unprocessed.
• Skipping the Section D burden-of-proof box: triggers an automatic burden-of-proof denial.
• Writing a generic medical opinion in Section E: fails the medical-necessity standard.
• Omitting the cited MTG section: the carrier cannot verify the variance is even needed.
• Missing the claimant signature: the form is incomplete and never opens the response clock.
• Stamped provider signature on paper: violates the original-signature rule.
• Filing retroactively for care already delivered: variances are prospective only.
• Forgetting to attach progress notes: leads to a burden-of-proof denial.
• Sending only to the carrier and not the WCB on paper: forfeits the proof-of-filing benefit.
• Using an outdated revision of the form: the WCB rejects non-current revisions.
• Filing through the wrong carrier code: the request never reaches the right adjuster.

Do’s and Don’ts

These quick rules separate approved variances from denied ones.

• Do file through OnBoard whenever possible, because it timestamps your submission and starts the clock automatically.
• Do cite the specific MTG chapter and bullet you are departing from, because vague citations fail the burden of proof.
• Do include measurable functional goals in Section E, because carriers approve care tied to recovery milestones.
• Do save the OnBoard receipt or fax confirmation, because you may need it if the carrier claims non-receipt.
• Do copy the claimant’s attorney, because a represented worker’s counsel can push back on an improper denial.
• Do calendar the 8-business-day deadline, because silent approvals are real and enforceable.
• Don’t request open-ended care, because carriers deny anything without a defined endpoint.
• Don’t submit a stamped signature on paper, because the WCB treats it as unsigned.
• Don’t use the broker’s name in Section B, because the request will misroute.
• Don’t ask for retroactive approval, because WCB Subject No. 046-959 bars it.
• Don’t rely on medical literature alone, because the variance must connect to this patient’s findings.
• Don’t wait until the MTG cap is exhausted to file, because PT and other care interruptions hurt outcomes.

Pros and Cons of Filing on Your Own vs. With Help

Most authorized providers complete MG-2.1 themselves, but many use a billing service or claimant attorney coordination for complex variances.

Pros of filing on your own: – No third-party fee, because the form itself is free and OnBoard is free. – Faster turnaround, because the provider controls the filing date. – Direct clinical voice in Section E, because no one knows the patient better than the treating provider. – Full control over attachments, because the provider chooses what records to include. – Easier hearing testimony, because the provider’s own narrative becomes the record.

Cons of filing on your own: – Office time burden, because each variance can take 30–60 minutes of provider time. – Risk of procedural denial, because non-lawyers may miss burden-of-proof nuances. – No advocate at the hearing, because the provider may need separate counsel if the carrier disputes. – Limited template library, because most EHRs do not have MG-2.1 templates. – Exposure to fraud allegations, because a sloppy form can attract a WCL §114-a review.

A useful comparison is between paper and OnBoard filing.

Filing Method	Key Trade-Off
OnBoard	Faster, validated, auto-routed, no fee
Paper or fax	Allowed in narrow exceptions, slower, higher rejection rate

FAQs

Is Form MG-2.1 the same as Form MG-2?

No. Form MG-2 requests optional prior approval for care inside the MTGs, while MG-2.1 requests a variance for care outside the MTGs. Different standards and different deadlines apply.

Can the injured worker file MG-2.1?

No. Only the WCB-authorized treating provider may file. The worker may sign the acknowledgment but cannot initiate the request.

Do I write the WCB case number with or without the leading G?

Yes, include the leading G exactly as the WCB issued it (for example, G2845013). Dropping it causes an OnBoard system rejection.

What if the patient cannot sign because they are hospitalized?

Yes, a healthcare proxy or legal guardian may sign in the claimant signature box, with the proxy’s name, relationship, and authority noted next to the signature.

How long does the carrier have to respond?

Yes, 8 business days for medical-merits review and 15 business days if the carrier asserts a burden-of-proof challenge with a same-or-higher-specialty peer review.

What happens if the carrier ignores my MG-2.1?

Yes, the variance is automatically approved by operation of law under 12 NYCRR §324.3(d), and the provider may begin care.

Do I check more than one box in Section D?

No. Choose the single best-fitting burden-of-proof basis. Multiple boxes confuse the reviewer and weaken the request.

Can a nurse practitioner sign as the provider?

Yes, but only if the NP is the WCB-authorized treating provider on the case. Otherwise the supervising physician must sign.

Is there a filing fee for MG-2.1?

No. The form, OnBoard submission, and WCB processing are all free.

Can I request a variance retroactively?

No. Variances are prospective only. Care delivered before approval is at the provider’s financial risk.

Do I need to attach progress notes?

Yes. The most recent treatment notes, imaging, and functional measures are required to meet the burden of proof under 12 NYCRR §324.3.

What MTG section do I cite if the condition is not in the guidelines?

Yes, check Section D box 4 and write Condition not addressed by current MTGs, then explain why standard care still fails and the variance is needed.

Can I appeal a denial of my variance?

Yes, the provider or claimant may request expedited review, and the matter is set down before a Workers’ Compensation Law Judge under 12 NYCRR §324.3(e).

Does an opioid variance need a urine drug screen?

Yes, the Non-Acute Pain MTG requires a current UDS, MME calculation, CDC risk assessment, and a written pain agreement attached to MG-2.1.