CPT Code 00472: Anesthesia for partial rib resection and thoracoplasty

Key Takeaways

CPT Code 00472 describes anesthesia for partial rib resection; thoracoplasty (any type), maintained by the AMA under the thorax/chest wall code range 00400-00474.

The code carries 10 base units per VA and state Medicaid fee schedules; total billed units equal base units plus time units plus physical status modifying units.

Physical status modifiers (P1-P6), qualifying circumstance codes, and CRNA supervision modifiers (QZ, QX, QY, QK) apply and must match the anesthesia record exactly.

Practice management software like Pabau streamlines anesthesia billing workflows, reducing submission errors and supporting accurate CPT Code 00472 documentation.

CPT Code 00472 is an anesthesia billing code for partial rib resection with thoracoplasty (any type), carrying 10 base units under the AMA’s thorax and chest wall anesthesia section (00400-00474). This guide covers the 2026 descriptor update, base and time unit calculation, modifier rules, and the documentation payers request before releasing payment.

CPT Code 00472: Definition and clinical description

CPT Code 00472, as maintained by the American Medical Association (AMA), describes anesthesia services for partial rib resection with thoracoplasty of any type. It sits in the thorax (chest wall and shoulder girdle) anesthesia section, alongside codes 00400 through 00474.

As of January 1, 2026, the short descriptor was updated, though the full descriptor remains unchanged: anesthesia for partial rib resection; thoracoplasty (any type).

What procedures does CPT Code 00472 cover?

The code applies when an anesthesiologist or CRNA provides anesthesia for a surgical procedure involving partial rib removal combined with thoracoplasty. Thoracoplasty refers to a surgical technique that reshapes or collapses a portion of the chest wall, often performed to treat conditions such as tuberculosis-related chest deformity, post-lobectomy space problems, or thoracic outlet issues requiring structural rib modification.

The “any type” qualifier in the descriptor is significant. It means CPT Code 00472 covers multiple thoracoplasty surgical approaches under a single anesthesia code, as long as partial rib resection is the primary procedure rather than a radical resection (which routes to 00474).

Base units and time unit calculation for CPT Code 00472

Anesthesia billing follows a different formula from standard surgical coding. Rather than a flat fee per procedure, payers reimburse based on a unit total that combines base units, time units, and modifying units. Getting this calculation wrong by even a single unit generates underpayment or triggers an audit flag.

Using the formula: a 90-minute thoracoplasty (6 time units) on a P3 patient would generate 10 + 6 + 1 = 17 total units before applying the locality-specific conversion factor. Claims management software can automate this calculation and flag mismatches between the anesthesia record and what was submitted, which is where most billing errors originate.

Modifiers for CPT Code 00472

Modifier selection for anesthesia claims is not optional. Missing or mismatched modifiers are a leading cause of claim denial and potential compliance issues under the National Correct Coding Initiative (NCCI). CPT Code 00472 accepts both physical status modifiers and care team supervision modifiers.

Physical status modifiers (P1-P6)

The ASA physical status classification reflects the patient’s overall health at the time of surgery. Every anesthesia claim requires one physical status modifier. These are not optional add-ons; they are required claim elements that also affect total unit count for payers that recognize modifying units.

• P1: Normal healthy patient, no additional units
• P2: Mild systemic disease, no additional units
• P3: Severe systemic disease, +1 modifying unit
• P4: Severe systemic disease that is a constant threat to life, +2 modifying units
• P5: Moribund patient not expected to survive without the operation, +3 modifying units
• P6: Brain-dead patient for organ donation purposes; payer recognition varies

CRNA and anesthesia care team modifiers

When a CRNA provides or participates in the anesthesia service rather than a physician anesthesiologist working alone, supervision modifiers determine how the claim is filed and at what reimbursement rate. These modifiers must accurately reflect the actual supervision relationship at the time of service. Medical office compliance documentation for anesthesia must record the specific supervision arrangement for every case.

• QZ: CRNA service without medical direction by a physician; CRNA bills independently
• QX: CRNA service with medical direction by a physician; CRNA uses QX, physician uses QK
• QY: Anesthesiologist medically directs one CRNA; physician bills QY
• QK: Medical direction of two to four concurrent anesthesia procedures involving qualified individuals; physician’s modifier when directing multiple CRNAs

State-level opt-out elections also affect which modifiers apply. In states where the governor has opted out of the federal physician supervision requirement for CRNAs, the QZ modifier becomes more broadly applicable. Verify the current opt-out status for your state before selecting supervision modifiers.

Qualifying circumstance codes

Qualifying circumstance (QC) add-on codes describe unusual conditions that significantly affect the character of the anesthesia service. They are billed in addition to CPT Code 00472 when applicable.

• 99100: Anesthesia for a patient under 1 year or over 70 years old
• 99116: Utilization of total body hypothermia during anesthesia
• 99135: Controlled hypotension during anesthesia
• 99140: Emergency conditions during anesthesia

Documentation requirements for CPT Code 00472

The anesthesia record is both the clinical document and the billing justification. Payers auditing CPT Code 00472 claims will request the anesthesia record to confirm that billed units, modifiers, and the procedure itself match what is documented. Missing documentation elements translate directly into recoupment demands.

Complete documentation for a CPT Code 00472 claim includes all of the following elements, supported by structured anesthesia record documentation that timestamps each phase of care.

• Pre-anesthesia evaluation: ASA physical status classification with clinical justification, airway assessment, review of medications and allergies
• Anesthesia start and end times: Exact times defining total anesthesia time for time unit calculation
• Intraoperative monitoring record: Continuous vital signs, anesthetic agents administered, dosages, and routes
• Surgical procedure confirmation: Documentation confirming the procedure was partial rib resection with thoracoplasty (not a radical procedure, which would require 00474)
• Post-anesthesia care: PACU notes, discharge criteria, and handoff documentation
• Provider identification: Clear identification of the anesthesia provider(s) and their supervision relationship

Using digital anesthesia intake forms that capture structured fields for physical status, procedure type, and start/end times removes the manual transcription risk that creates audit exposure. EHR integration for surgical practices that links anesthesia records directly to billing workflows further reduces the time between case completion and claim submission.

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CPT Code 00472 vs adjacent codes: 00470 and 00474

The three codes in the partial rib resection family are frequently confused because their descriptors share common language. Selecting the wrong code because the procedure type was not confirmed upfront results in a denial that is avoidable with a straightforward crosscheck.

The clinical distinction matters beyond billing. A surgeon performing a Nuss procedure for pectus excavatum is doing radical chest wall reconstruction. That maps to 00474, not CPT Code 00472. Billing 00472 for a pectus excavatum repair undercodes by 3 base units and understates the clinical complexity of the case.

Confirm the operative approach with the surgeon before code selection. For concurrent thoracotomy services on the same claim, cross-reference CPT 00540.

When does 00546 apply instead?

CPT code 00546 covers anesthesia for thoracotomy procedures involving the lungs, pleura, or mediastinum. If the surgical record documents a true thoracotomy with lung involvement rather than a chest wall rib resection with thoracoplasty, 00546 is the correct code. The two procedures are anatomically distinct: CPT Code 00472 is chest wall/structural, while 00546 is intrathoracic/lung-focused.

When the operative note also documents one-lung ventilation during a thoracotomy, check the anesthesia record against CPT 00541 rather than defaulting to CPT Code 00472.

Medicare reimbursement and payer-specific policies for CPT Code 00472

Medicare reimburses anesthesia services at a locality-adjusted rate derived from the base unit value multiplied by the payer’s conversion factor. For CPT Code 00472, the 10 base units serve as the starting point; however, total reimbursement varies substantially by geographic region, patient physical status, and anesthesia time.

Use the FastRVU 2026 RVU lookup to verify current work, practice expense, and malpractice RVU values for CPT Code 00472 in your locality before submitting claims. CMS updates anesthesia conversion factors annually as part of the Medicare Physician Fee Schedule. Always cite the current year’s fee schedule rather than a cached or prior-year figure.

Commercial and Medicaid payer considerations

Commercial insurers may apply different conversion factors, different physical status unit values, or different supervision modifier requirements than Medicare. Some commercial contracts reimburse at a flat fee rather than using the anesthesia unit formula. Key payer-specific variables to confirm before submitting CPT Code 00472 include the following.

• Whether the payer uses the base unit + time unit formula or a flat rate per procedure
• Whether physical status modifying units are reimbursed or ignored
• Pre-authorization requirements for elective thoracoplasty procedures
• CRNA supervision modifier recognition and associated reimbursement percentages
• State Medicaid-specific fee schedules (New York eMedNY and Massachusetts MassHealth publish anesthesia unit values; both confirm 10 base units for 00472)

Maintaining separate payer contracts in your anesthesia practice management workflows and flagging pre-authorization requirements by CPT code prevents the most common administrative denials. Use the AAPC Codify CPT lookup to cross-reference code descriptors and associated payer guidelines when payer-specific policies are unclear.

Common billing errors and denial prevention for CPT Code 00472

Claims for CPT Code 00472 are denied most often for four reasons: incorrect code selection (usually 00470 or 00474 used instead), missing or mismatched modifier combinations, time unit discrepancies between the anesthesia record and the submitted claim, and insufficient documentation of the thoracoplasty procedure type. Each is preventable with a pre-submission checklist.

Practices that maintain secured patient procedure records with audit trail logging can respond to payer medical record requests faster and with complete documentation chains. Cross-check code selection against the CMS Physician Fee Schedule, which reflects the current year’s descriptor and reimbursement data rather than an outdated code set.

Billing teams handling anesthesia across multiple specialties often cross-reference related procedure codes, including CPT 01320 for knee and popliteal procedures, CPT 01925 for carotid or coronary interventional radiology, CPT 00880 for major lower abdominal vessel procedures, and CPT 00754 for omphalocele hernia repair.

Conclusion

Anesthesia billing for thoracic procedures requires precision at every step, and CPT Code 00472 is no exception. The 10 base unit value is only the starting point; correct modifier selection, accurate time documentation, and confirmed procedure type determine whether the claim pays on first submission or cycles through denials.

Pabau’s claims management software helps anesthesia and surgical practices reduce submission errors by connecting structured clinical documentation directly to billing workflows. To see how the platform handles anesthesia coding documentation, book a demo with the Pabau team.

Continue your research

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Coding a different thoracotomy scenario? CPT 00541 covers anesthesia for thoracotomy with one-lung ventilation, a common differential from standard thoracoplasty billing.

Frequently Asked Questions