Modifier 32: Mandated Services, and Why It Does Not Create Coverage

Modifier 32 reports that a service was mandated — required by a third party such as a payer, a governmental or legislative body, a regulator, or a peer review organisation — rather than requested by the patient or ordered by the treating clinician to diagnose or treat a problem.

It is a low-volume modifier and the decision is genuinely simple. What is not simple, and what this page exists to say, is the consequence: modifier 32 does not create coverage. Telling a payer that someone else required the service does not make it a benefit. On a Medicare claim it does not change payment at all, and for the most common mandated-service fact patterns the underlying service is expressly excluded from the Medicare benefit. Appending modifier 32 to a service that is not covered produces a denial with a modifier on it, not a payment.

The Decision Rule

Two questions, in order.

1. Who required the service?

• A third party — an insurer, an employer, a court, a government agency, a peer review organisation, a licensing or regulatory body — and the service exists because they required it → the fact pattern modifier 32 describes.
• The patient, asking for another view → not a mandated service. Under Medicare, the Benefit Policy Manual (Publication 100-02), Chapter 15, treats patient-initiated second opinions as a covered category in their own right, where they relate to the medical need for surgery or for major non-surgical diagnostic and therapeutic procedures such as cardiac catheterisation or gastroscopy. Where the first and second physicians disagree about the need for the procedure, a third opinion is also covered. Notably, second and third opinions are covered even though the surgery or other procedure, if performed, is determined not to be covered, and payment may be made for the history and examination plus the other covered diagnostic services required to evaluate the need and render an opinion.
• The treating clinician, for diagnosis or treatment → an ordinary service, coded as such.

2. Is the service a benefit at all?

This is the question that decides the claim, and it is entirely independent of the first. Chapter 16 of the Benefit Policy Manual, Section 20, states the general rule: items and services not reasonable and necessary for the diagnosis or treatment of illness or injury, or to improve the functioning of a malformed body member, are not covered.

Section 90 then names the mandated-service case directly. The routine physical checkup exclusion, it says, applies to (a) examinations performed without relationship to treatment or diagnosis for a specific illness, symptom, complaint or injury, and (b) examinations required by third parties such as insurance companies, business establishments, or Government agencies.

That second clause is the modifier 32 fact pattern, written into the exclusion. An employment physical, an insurance-application examination, a fitness-for-duty assessment, a pre-adoption or licensure examination: mandated, and excluded. Modifier 32 describes them accurately and changes nothing about their status.

The manual even supplies a worked example of the right answer. A diagnostic test or examination performed solely to establish a claim under the Black Lung Benefits Act is not covered under Medicare, and the manual instructs that the claimant be advised to contact their Social Security office about filing under the Black Lung programme. The service is real, the mandate is real, and the payer is someone other than Medicare.

Section 90 also lists what the routine-checkup exclusion does not reach, and the list is the statutory preventive benefit: screening mammography, colorectal cancer screening tests, screening pelvic exams, prostate cancer screening tests, glaucoma screening, abdominal aortic aneurysm ultrasound screening, cardiovascular disease and diabetes screening tests, screening electrocardiogram, the initial preventive physical examination, annual wellness visits, and additional preventive services meeting the criteria at 42 CFR 410.64. Those are covered because Congress made them benefits — not because anyone mandated them. Where a service is preventive in that sense, the modifier question is modifier 33, not modifier 32.

What Modifier 32 Does to Payment: Nothing

Chapter 12 of the Medicare Claims Processing Manual (Publication 100-04), Section 20.5, lists the things contractors may not make adjustments in fee schedule amounts for. Alongside inherent reasonableness, comparability and refractions, the list names a specific group of modifiers — the HCPCS modifiers AT, ET, LT, RT and SF, and the CPT modifiers 23 (unusual anesthesia), 32 (mandated services), 47 (anesthesia by surgeon), 76 (repeat procedure by same physician) and 90 (reference laboratory).

That single sentence is the most useful thing CMS says about modifier 32. It is an informational modifier. It does not increase payment, it does not reduce it, and it does not unlock anything. Contrast it with modifier 22, which prices by individual consideration on documentation, or with modifier 51, which reduces secondaries. Modifier 32 belongs to a different category entirely: it annotates the claim.

One neighbour on that list is worth noting. SF identifies a second opinion ordered by a peer review organisation — a genuinely mandated second opinion, with its own Medicare modifier. Where a Medicare claim involves a PRO-ordered opinion, SF is the modifier that describes it.

Where Modifier 32 Meets the ABN Family

Because so many mandated services are excluded rather than merely unnecessary, the liability question runs a specific way, and getting it wrong is the most expensive error available on a modifier this small.

Situation	Liability modifier	Why
Service is statutorily excluded — a third-party-required examination, an employment or insurance physical	GY	The service is never a Medicare benefit. GY denies as beneficiary liability, and an ABN is not required to shift it.
The practice issued a voluntary notice anyway	GX, and GX may be reported with GY	Documents that the patient was told, on a service where notice was not legally required.
Service is a benefit category but is expected to be denied as not reasonable and necessary, and a valid ABN was given	GA	The GA route only exists for medical-necessity denials, and only where a proper ABN was actually issued.

The trap is treating a mandated service as a GA situation. GA is for a service that could be covered but is expected not to be, with an advance beneficiary notice on file. A third-party-required examination is not in that category at all — it is outside the benefit, which is GY territory. The GX, GY and GZ guide sets out the distinction and the remittance codes that expose it: a GY denial carries the beneficiary-liability group code, a provider-liability denial carries a different one, and the difference is visible on the remittance advice before anyone reads the notes.

In practice, the cleanest handling of a genuinely mandated non-benefit service is not a modifier at all. Bill the party that mandated it. The employer, the insurer, the agency or the court required the service and is usually the payer for it; the Medicare claim exists, if at all, only to generate a formal denial for a secondary payer or for the patient’s records.

What the Record Must Show

• Who required the service, in writing. The mandate is the entire justification for the modifier. A referral letter, a court order, an agency request, a PRO determination — retain the document, not a note that says the visit was "required."
• What was required and why. The scope of a mandated examination is set by the requester, and a note that reads like an ordinary problem-focused encounter does not describe a mandated service.
• Whether the patient was told who pays. Where the service is excluded, the patient’s financial exposure should be established before the appointment, not discovered from a remittance advice. A voluntary notice, reported with GX, is the mechanism for recording that conversation.
• That the mandate did not drive the clinical content. If a genuinely medically necessary service was furnished at the same encounter, it is a separate service with its own justification — and where an evaluation and management service is separately identifiable, that is a modifier 25 question.

The Misuse That Triggers Denials

1. Using modifier 32 to make an excluded service payable. It is informational. Chapter 12 tells contractors not to adjust the fee schedule amount for it at all.
2. Using it on a patient-initiated second opinion. Patient-initiated second and third opinions are their own covered category under Medicare. Labelling one as mandated misdescribes it.
3. Using GA instead of GY on a mandated non-benefit service. Wrong liability route, wrong remittance, and on an assigned claim the practice can end up holding a bill it could have collected directly.
4. Assuming a mandate from a commercial payer transfers to Medicare. A service a commercial plan required as a condition of coverage is not thereby a Medicare benefit. Each payer’s rules govern its own claim.
5. Billing Medicare for a Black Lung claim examination. Not covered; the manual says to direct the claimant to Social Security.
6. Treating modifier 32 as a documentation-triggering modifier. It is not one. Unlike modifier 22 or modifier 52, it does not send the claim for individual consideration, so attaching a report to a modifier 32 claim achieves nothing on its own.

Where Jurisdiction Matters, and Where Guidance Is Simply Absent

There is very little contractor guidance to consult, and that is itself worth knowing. Noridian, whose Part B site publishes a page for each of dozens of modifiers — 22, 24, 25, 26, 33, 47, 50 through 82, 90, 91, 95, and most of the HCPCS liability and telehealth set — publishes no page for modifier 32 at all. Where a MAC has not written about a modifier, the operative guidance is the manual, and the manual’s treatment of modifier 32 amounts to one line in a list of things not to adjust payment for.

Commercial payers use it more actively than Medicare does. Modifier 32 is a CPT modifier and several plans do expect it on services they themselves mandated — second surgical opinions required as a condition of authorisation, independent medical examinations, examinations required under a workers’ compensation scheme. Those programmes are the modifier’s natural home, and workers’ compensation and automobile insurance schemes are governed by state law rather than by Medicare rules. Verify against the specific programme’s billing instructions, because a mandated-service requirement is usually written into a contract rather than a manual.

Do not extrapolate the payment treatment. The "no adjustment" instruction is a Medicare fee-schedule instruction. A commercial plan is free to price a mandated service differently, and some do.

Frequently Asked Questions

What is modifier 32 used for?

To report that a service was mandated by a third party — a payer, a governmental or regulatory body, a court, or a peer review organisation — rather than requested by the patient or ordered by the treating clinician for diagnosis or treatment.

Does modifier 32 increase payment?

No. Chapter 12, Section 20.5 of the Medicare Claims Processing Manual lists modifier 32 among the modifiers for which contractors may not make adjustments in fee schedule amounts. It is informational.

Does modifier 32 make a non-covered service covered?

No. Coverage is decided by the benefit rules, not by who required the service. Chapter 16 of the Benefit Policy Manual excludes examinations required by third parties such as insurance companies, business establishments or government agencies, and that exclusion is unaffected by the modifier.

Is a second opinion a mandated service?

Only if a third party required it. A patient-initiated second opinion relating to the medical need for surgery or a major procedure is covered by Medicare as its own category, and a third opinion is covered where the first two disagree. A second opinion ordered by a peer review organisation has its own Medicare modifier, SF.

Which liability modifier goes with a mandated service?

Where the service is statutorily excluded — the usual case for a third-party-required examination — the answer is GY, with GX if a voluntary notice was issued. GA is for a service within a benefit category expected to be denied as not reasonable and necessary, with a valid advance beneficiary notice on file, and it does not fit a mandated non-benefit service.

Who should we bill for a mandated examination?

Usually the party that mandated it. Where the service is outside the Medicare benefit, the employer, insurer, agency or court that required it is the payer. The manual’s own example — an examination performed solely to establish a Black Lung benefits claim — directs the claimant to the programme that requires it rather than to Medicare.

Related CASRAI Resources

• Modifiers GX, GY and GZ — the liability decision a mandated service usually runs into
• Modifier GA: shifting liability with an ABN on file
• Advance beneficiary notices
• Modifier 33 and modifier PT — for services that are preventive rather than mandated
• Modifier 47: anesthesia by the surgeon — another modifier on the same no-adjustment list
• Modifier 90: reference laboratory — and another
• Modifier 22 — the contrast: a modifier that does change pricing, on documentation
• The False Claims Act in billing

Sources: CMS Medicare Claims Processing Manual, Publication 100-04, Chapter 12, Section 20.5 (no adjustments in fee schedule amounts, listing CPT modifiers 23, 32, 47, 76 and 90 and HCPCS modifiers AT, ET, LT, RT and SF). CMS Medicare Benefit Policy Manual, Publication 100-02, Chapter 15, Section 30.C (patient-initiated second opinions); Chapter 16, Section 20 (services not reasonable and necessary) and Section 90 (routine services and appliances, Rev. 186, including the third-party examination exclusion, the list of statutory preventive services at 42 CFR 411.15(a)(1) and the Black Lung claim example). The absence of Noridian Part B guidance on modifier 32 was confirmed against that contractor’s published modifier index on 23 August 2026. CPT is a registered trademark of the American Medical Association; modifier meanings are described here in summary and the AMA’s descriptor text is not reproduced. General reference material, not coding advice for a specific claim — verify against your own MAC’s current guidance and, for a mandated service, the mandating programme’s own billing instructions.