Modifier 47: Anesthesia by the Surgeon, and What It Cannot Do

Modifier 47 reports that the surgeon — not an anesthesiologist, not a CRNA — provided the regional or general anesthesia for their own procedure. It goes on the surgical code, never on an anesthesia code, and it is never used by an anesthesia provider.

It is a short decision with a specific misuse pattern, and one blunt fact sitting under it: Medicare does not pay for it. Under CMS anesthesia rules, anesthesia furnished by the physician who also performs the procedure is included in the payment for the procedure. Modifier 47 describes that arrangement accurately; it does not monetise it. Practices that reach for modifier 47 expecting additional payment have misread what the modifier is for, and the resulting claims range from harmlessly informational to actively wrong.

The Decision Rule

Modifier 47 applies when all of the following hold:

1. The anesthesia was regional or general. Local anesthesia is expressly outside the modifier.
2. The anesthesia was provided by the operating surgeon (contractor guidance extends it to the attending or assistant surgeon).
3. The modifier is appended to the basic surgical service — the procedure code — and not to an anesthesia code.

Everything else is a reason not to use it:

• An anesthesiologist or CRNA provided the anesthesia. Then this is an anesthesia claim by a separate provider, reported with an anesthesia code and the appropriate anesthesia HCPCS modifier. Contractor guidance states that use of modifier 47 by the anesthesiologist is not permitted.
• The surgeon merely monitored anesthesia given by someone else — an anesthesiologist, CRNA, resident or intern. Contractor guidance rules this out explicitly. Monitoring is not administering.
• It was local anesthesia. Excluded by the modifier’s own terms, and independently bundled: the National Correct Coding Initiative Policy Manual lists local, topical or regional anesthesia administered by the physician performing the procedure and sedative administration by the physician performing a procedure among the services always included in a surgical procedure under the standards of medical and surgical practice.
• The surgeon provided moderate sedation. Moderate sedation has its own codes. Contractor guidance says not to report modifier 47 with a surgical procedure code when the surgeon provides moderate sedation.
• You are looking at an anesthesia code. Modifier 47 is not appended to CPT codes 00100 through 01999, and it is not a modifier for anesthesia or local anesthesia codes.

Why It Does Not Pay, and Where That Rule Lives

The anesthesia rules

The 2026 National Correct Coding Initiative Policy Manual, Chapter 1, Section G, states it directly: under CMS anesthesia rules, with limited exceptions, Medicare does not allow separate payment for anesthesia services performed by the physician who also furnishes the medical or surgical service. Payment for the anesthesia service is included in the payment for the procedure. The manual adds that the same is generally true under the hospital Outpatient Prospective Payment System.

It then gets specific. Separate payment is not allowed for the physician’s performance of local, regional, or most other anesthesia including nerve blocks where that physician also performs the procedure. Anesthesia codes 00100 to 01999, and services bundled into anesthesia, are not reported in addition to the procedure when the same physician does both. And the physician performing a procedure is not to report an epidural or subarachnoid injection, or a nerve block, as the anesthesia for that procedure.

Section D of the same chapter closes the obvious workaround: the physician performing a surgical or medical procedure shall not report the infusion and injection administration codes for the administration of anesthetic agents during the procedure, and when anesthesia services are not separately reportable, providers shall not unbundle components of anesthesia and report them in lieu of an anesthesia code. The manual names the usual candidates — introduction of a needle or intracatheter into a vein, venipuncture, intravenous infusion or injection, and cardiac assessment codes — as improperly reported when the anesthesia is provided by the physician performing the procedure.

Where it is medically reasonable and necessary for a separate anesthesia practitioner to furnish anesthesia (monitored anesthesia care, for example), that practitioner may report a separate anesthesia service. That is the exception, and it is a different provider on a different claim — not modifier 47.

And the fee schedule instruction

Chapter 12 of the Medicare Claims Processing Manual (Publication 100-04), Section 20.5, lists modifier 47 among the items for which contractors may not make adjustments in fee schedule amounts — alongside CPT modifiers 23 (unusual anesthesia), 32 (mandated services), 76 and 90, and the HCPCS modifiers AT, ET, LT, RT and SF. Contractor guidance draws the plain conclusion: if the same physician performs the anesthesia and the surgery, the anesthesia is inclusive with the surgery, no separate or additional benefit is available, and modifier 47 is an informational modifier only.

The intensity ladder that decides what can be reported at all

Chapter 12, Section 50 sets out the continuum of anesthesia services from least to most intense: local or topical anesthesia, moderate (conscious) sedation, regional anesthesia, general anesthesia. Moderate sedation is defined as a drug-induced depression of consciousness during which the patient responds purposefully to verbal commands, alone or with light tactile stimulation, and it expressly does not include minimal sedation, deep sedation or monitored anesthesia care.

The section then makes the practical rule explicit: if the physician performing the medical or surgical procedure also provides a level of anesthesia lower in intensity than moderate sedation, such as local or topical anesthesia, the moderate sedation code should not be reported and no separate payment should be allowed. The NCCI manual is consistent with this from the other direction, noting that Medicare generally allows separate reporting of moderate conscious sedation services when provided by the same physician performing the procedure, except where the anesthesia service is bundled into that procedure.

So there is a narrow band — moderate sedation — where the surgeon’s own sedation is separately reportable, and it is reported with a sedation code, not with modifier 47.

Modifier 47 vs the Anesthesia Modifiers

This is where most of the errors live. Modifier 47 and the anesthesia HCPCS modifiers look adjacent and behave nothing alike.

	Modifier 47	Anesthesia HCPCS modifiers (AA, QK, QX, QY, QZ, QS and others)
Goes on	The surgical code	The anesthesia code (00100–01999)
Reported by	The surgeon	The anesthesia practitioner
Answers	Who gave the anesthesia for this operation	Who performed or directed the anesthesia, and in what supervisory arrangement
Effect on payment	None — no fee schedule adjustment	Determines the payment split between physician and non-physician anesthetist

Two nearby modifiers are worth separating explicitly:

• Modifier 23, unusual anesthesia, sits on the same no-adjustment list in Chapter 12 but describes a different thing entirely: a procedure that ordinarily requires no anesthesia or only local, furnished under general anesthesia because of the circumstances. It belongs on the anesthesia claim.
• Modifier QS reports monitored anesthesia care. Contractor guidance notes anesthesiologists use QS to report it. Monitored anesthesia care furnished by a separate practitioner is the case NCCI carves out as separately reportable — and it is precisely the case where modifier 47 does not apply, because the surgeon did not give the anesthesia.

What the Record Must Show

• Who administered the anesthesia, by name and role. The entire content of modifier 47 is an assertion about identity. If the anesthesia record is signed by anyone other than the operating surgeon, the modifier is wrong on its face.
• What level of anesthesia was given. Regional or general for modifier 47; local, topical or sedation take the claim somewhere else entirely. Chapter 12’s intensity ladder is the vocabulary to use, and "sedation" without a level does not resolve the question.
• Where a separate anesthesia practitioner was involved, what they did. A surgeon who supervised or monitored while an anesthesiologist, CRNA, resident or intern administered has not administered. Record the distinction, because the two claims that follow are completely different.
• For moderate sedation, the elements the sedation codes require. If the surgeon’s own sedation is being reported separately, it is being reported on a sedation code with its own documentation requirements — not on the strength of modifier 47.

The Misuse That Triggers Denials and Audits

1. Appending modifier 47 to an anesthesia code. The single most common error. Modifier 47 is not a modifier for CPT 00100–01999, and appending it there misidentifies both the service and the biller.
2. An anesthesiologist or CRNA using modifier 47. Not permitted. The anesthesia HCPCS modifiers exist for that claim.
3. Using modifier 47 when the surgeon monitored rather than administered. Contractor guidance names the situation and rules it out, including where the anesthesia was performed by a resident or intern.
4. Using modifier 47 for local anesthesia. Outside the modifier by definition and independently bundled into the procedure by NCCI’s standards-of-practice list.
5. Reporting a nerve block or epidural as the anesthesia for one’s own procedure. NCCI forecloses it. Note the words: the restriction is on reporting the block as the anesthesia for that procedure. A block furnished for a different, separately justified purpose is a different analysis with its own rules, and it should be assessed on those rules rather than assumed to be either allowed or denied.
6. Unbundling anesthesia into its components. Reporting venipuncture, IV access, infusion administration or cardiac monitoring codes in lieu of an anesthesia service the physician cannot separately report. NCCI names this pattern specifically.
7. Expecting modifier 47 to increase payment. It cannot. Contractors are instructed not to adjust the fee schedule amount for it, and the anesthesia is included in the procedure payment. This is not a documentation problem that better paperwork solves — contrast modifier 22, where documentation genuinely drives pricing.

Where Jurisdiction Matters, and Where Guidance Diverges

One MAC statement is stronger than the manual’s. Noridian’s Part B guidance says, in its incorrect-use list, "Do not append modifier 47 to the CPT code when the surgeon administers the regional or general anesthesia. This service is not covered by Medicare" — while elsewhere on the same page describing modifier 47 as informational only. Those two statements sit awkwardly together: one says do not use it, the other says it carries no payment consequence. The safest reading, and the one consistent with the manuals, is that the anesthesia is not separately payable either way, and whether to annotate the claim is a jurisdictional preference rather than a payment question. Follow your own MAC’s instruction; nothing turns on it financially under Medicare.

Non-Medicare payers are the modifier’s real home. Modifier 47 is a CPT modifier, and some commercial plans, workers’ compensation programmes and automobile insurers do recognise it and do adjust payment when the surgeon provided the anesthesia. The Medicare bundling rule is a Medicare rule; it does not transfer. Where a non-Medicare payer is involved, check that payer’s policy rather than assuming either outcome.

The bundling rules themselves are revised annually. The NCCI Policy Manual is reissued each year with a revision date on every page, and the code ranges it names change. Verify the current edition before relying on a specific code list.

MAC guidance differs in emphasis. Noridian, Novitas and First Coast Service Options all publish anesthesia and modifier guidance and do not read identically, particularly on moderate sedation reporting by the operating physician.

Frequently Asked Questions

What does modifier 47 mean?

That the surgeon provided the regional or general anesthesia for their own procedure. It is appended to the surgical procedure code, not to an anesthesia code, and it does not include local anesthesia.

Does modifier 47 increase payment under Medicare?

No. Chapter 12, Section 20.5 of the Claims Processing Manual lists modifier 47 among the modifiers for which contractors may not adjust fee schedule amounts, and the NCCI Policy Manual states that Medicare does not allow separate payment for anesthesia performed by the physician who also furnishes the surgical or medical service — payment is included in the procedure.

Can an anesthesiologist or CRNA use modifier 47?

No. Contractor guidance states that use of the modifier by the anesthesiologist is not permitted. An anesthesia practitioner reports an anesthesia code with the appropriate anesthesia HCPCS modifier.

Can I use modifier 47 if the surgeon supervised the anesthesia?

No. Contractor guidance rules out modifier 47 where the surgeon is monitoring general anesthesia performed by an anesthesiologist, CRNA, resident or intern. The modifier asserts that the surgeon administered the anesthesia.

What about moderate sedation given by the operating surgeon?

That is reported with a moderate sedation code, not with modifier 47, and contractor guidance says not to report modifier 47 with a surgical code where the surgeon provided moderate sedation. The NCCI manual notes that Medicare generally allows separate reporting of moderate conscious sedation by the physician performing the procedure, except where it is bundled into that procedure. Where the physician provides something lower in intensity than moderate sedation, such as local or topical anesthesia, Chapter 12 states that the moderate sedation code should not be reported and no separate payment should be allowed.

What is the difference between modifier 47 and modifier 23?

Modifier 47 identifies who gave the anesthesia and goes on the surgical code. Modifier 23, unusual anesthesia, describes a procedure that ordinarily needs no anesthesia or only local being furnished under general anesthesia, and belongs on the anesthesia claim. Both appear on Chapter 12’s list of modifiers for which contractors may not adjust the fee schedule amount.

Can the surgeon bill a nerve block as the anesthesia for their own procedure?

Not as the anesthesia for that procedure. The NCCI Policy Manual states that the physician performing a surgical or medical procedure shall not report an epidural or subarachnoid injection or a nerve block for anesthesia for that procedure. A block furnished for a different and separately justified purpose is governed by its own rules and should be assessed against them.

Related CASRAI Resources

• Modifier 32: mandated services — another informational modifier on the same no-adjustment list
• Modifier 90: reference laboratory — and another
• Modifier 22 — the contrast: documentation genuinely changes the price
• Modifiers 73 and 74 — where anesthesia timing decides the facility payment
• Modifier 52 vs 53 — the professional side of a case abandoned under anesthesia
• Modifiers 80, 81, 82 and AS — the other participants in the operating room
• Modifiers 62 and 66: co-surgeons and surgical teams
• Modifier 59 and the X{EPSU} modifiers — for genuinely distinct services in one session
• The False Claims Act in billing

Sources: Medicare National Correct Coding Initiative Policy Manual, 2026 edition, Chapter 1, Section B (standards of medical and surgical practice, services always included), Section D (anesthesia rules and unbundling) and Section G (anesthesia service included in the surgical procedure), revision date 1 January 2026. CMS Medicare Claims Processing Manual, Publication 100-04, Chapter 12, Section 20.5 (no adjustments in fee schedule amounts) and Section 50, subsections J and K (moderate sedation, the anesthesia intensity continuum, and services lower in intensity than moderate sedation). Noridian Healthcare Solutions modifier 47 guidance (last updated 9 May 2025). The NCCI Policy Manual is reissued annually and its code ranges change — verify the current edition. 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 the payer’s policy.