CPT Code 01220: Anesthesia for closed procedures on the upper femur

Key Takeaways

CPT Code 01220 covers anesthesia for all closed procedures on the upper two-thirds of the femur, as defined by the AMA CPT code set.

The code carries 4 base units, confirmed across VA, Massachusetts MassHealth, Arizona ICA, and U.S. DOL fee schedules.

Adjacent open-procedure code 01230 carries 6 base units; selecting between them depends on whether the surgical approach is closed or open.

Pabau’s claims management software helps anesthesia practices track modifier usage, time units, and documentation requirements to reduce claim denials.

CPT Code 01220 is the anesthesia code for closed procedures on the upper two-thirds of the femur, most commonly billed for closed reduction of femoral fractures and percutaneous fixation. It carries 4 base units and sits within the CPT range for anesthesia on the upper leg, other than the knee.

Confirming the closed surgical approach in the operative note is what separates a clean 01220 claim from its higher-unit open-procedure counterparts.

CPT Code 01220: Definition and clinical description

CPT Code 01220 is the billing code applied when an anesthesiologist or certified registered nurse anesthetist (CRNA) provides anesthesia services for any closed surgical procedure performed on the upper two-thirds of the femur. The code sits within the CPT anesthesia code range 01200 through 01274, which covers all procedures on the upper leg except the knee.

Knee procedures fall under a separate anesthesia code and typically pair with diagnoses such as M17.4, bilateral primary osteoarthritis of the knee, rather than the femur-shaft fractures billed alongside 01220.

The key clinical distinction this code encodes is the surgical approach: closed procedures do not involve a formal incision into the joint or bone with open exposure. Typical procedures billed under 01220 include closed reduction of femoral fractures, intramedullary nailing performed under fluoroscopic guidance, and percutaneous pinning of upper femur fractures, injuries seen across orthopedic trauma and sports medicine practices alike.

The American Medical Association (AMA) maintains the CPT code set and owns the intellectual property behind the official descriptor.

Getting the approach documentation right is where most billing errors start. If the operative note describes a closed reduction with percutaneous fixation, 01220 is correct. If the surgeon opened the fracture site, 01230 applies instead, and it carries a higher base unit value.

Base units and the anesthesia billing formula

CPT Code 01220 carries 4 base units, as confirmed across multiple payer fee schedules including the VA Community Care Table H, Massachusetts MassHealth, Arizona Industrial Commission (2020-2021), and the U.S. Department of Labor Office of Workers’ Compensation Programs.

Anesthesia billing does not use a single flat rate. Total billable units are calculated with this formula:

For example, a 60-minute procedure with a P2 physical status modifier and no qualifying circumstances yields 4 (base) + 4 (time, at 15 min/unit) + 1 (P2 modifier) = 9 units. Multiply by your payer’s anesthesia conversion factor to arrive at the claim dollar amount. The CMS Physician Fee Schedule lookup tool lets you verify current Medicare conversion factor values by locality.

CPT Code 01220 modifiers and physical status

Modifiers change the billing context for CPT Code 01220 without altering the base code. Two categories apply to this code: provider role modifiers and physical status modifiers.

Provider role modifiers

These clarify who delivered the anesthesia and under what supervisory arrangement. Payer contracts determine which modifiers are recognized and how they affect reimbursement.

Physical status modifiers (P1-P6)

Physical status modifiers reflect the patient’s pre-anesthesia health condition and may add billing units depending on the payer. These align with the American Society of Anesthesiologists (ASA) classification system.

A patient with a mild systemic disease undergoing femur fracture repair would typically receive a P2 modifier, adding 1 unit to the claim. An emergency case on a patient with severe systemic disease could justify P4 or the qualifying circumstances add-on code 99140 for emergency conditions.

Qualifying circumstances codes 99100 through 99140 can be appended when additional complexity exists, such as extreme age (99100), controlled hypotension (99135), or emergency conditions (99140). These codes carry their own base unit values and are billed in addition to 01220 when clinically supported.

Documenting the clinical rationale clearly in the anesthesia record is what supports these add-ons during HIPAA-compliant claim documentation reviews.

Reimbursement rates for CPT Code 01220

Reimbursement for CPT Code 01220 varies by payer, geographic locality, and contract terms. No single national rate applies across all payers. The figures below reflect publicly available fee schedule data and should be verified against current payer contracts before billing.

One important caveat: Massachusetts MassHealth lists CPT Code 01220 as non-payable for acute outpatient hospital (AOH) settings as of January 1, 2025 (per the MassHealth AOH Subchapter 6.0 provider manual). This nonpayable status is not unique to 01220 — it applies broadly across nearly the entire anesthesia CPT range (01140–01999) under AOH facility billing.

The limitation does not extend to professional anesthesia billing in other care settings, but it illustrates why billing teams should verify payability at the state Medicaid level before submitting claims. Use FastRVU’s RVU lookup to check current Medicare reimbursement values by locality and work RVUs.

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Documentation requirements for CPT 01220 billing

Clean documentation is what separates paid claims from denied ones. For CPT Code 01220, the anesthesia record must support four things: the type of procedure performed, the surgical approach (confirming it was closed), the anatomical site (upper two-thirds of the femur), and the total anesthesia time.

Required documentation elements

• Procedure description: The operative note must state the procedure clearly, with enough specificity to confirm a closed approach. “Closed reduction, femoral shaft fracture with intramedullary nail” leaves no ambiguity.
• Anatomical site: The femur segment treated must fall within the upper two-thirds. A distal femur procedure would not be covered by 01220.
• Anesthesia start and stop times: Exact times are required for time unit calculation. Omitting precise times is a common audit trigger.
• Physical status: Document the ASA physical status classification used and the clinical basis for any P3 or higher modifier in the pre-anesthesia evaluation note.
• Qualifying circumstances: If 99100, 99135, or 99140 codes are appended, the clinical rationale must appear in the anesthesia record or pre-procedure evaluation.
• Provider identity: Whether the service was personally performed (AA) or medically directed (QK/QX) must be clearly established in documentation.

Practices using digital anesthesia intake forms can standardize pre-procedure documentation capture and reduce the risk of missing required elements at the point of claim submission. Pabau’s claims management workflows support structured documentation tied directly to billing codes.

Related CPT codes: 01220 compared to adjacent upper femur codes

Selecting the right code from the upper femur anesthesia range requires a clear understanding of what each code covers. The differences often come down to surgical approach (closed vs open) and the specific type of procedure performed.

The 01220 vs 01230 decision is the most common code selection question in this range. Both codes cover the upper two-thirds of the femur, but 01220 is exclusively for closed procedures while 01230 covers open procedures not otherwise specified. The base unit difference (4 vs 6) reflects the increased complexity of open surgical access.

Verify both the anatomical site and surgical approach in the operative note before selecting either code. For additional context on related procedure codes, the AAPC Codify CPT range lookup provides the full hierarchy for codes 01200 through 01274 with official long descriptors.

Practices treating musculoskeletal trauma may also encounter 01250, which covers anesthesia for all procedures on nerves, muscles, tendons, fascia, and bursae of the upper leg. That code applies when the surgical target is soft tissue rather than bone.

Not every code in the range stays active: CPT 01180, once used for obturator neurectomy anesthesia, has since been deleted from the code set, a reminder to confirm a code’s current status before billing it.

Billing guidelines and common denial reasons for CPT 01220

Claim denials for anesthesia codes like 01220 follow predictable patterns. Most stem from incomplete documentation, modifier mismatches, or payer-specific coverage limitations.

Top denial triggers

• Wrong approach code: Billing 01220 when the operative note documents an open procedure. The payer will deny or downcode to 01230 if the note is audited.
• Missing or mismatched modifiers: Submitting without a provider role modifier (AA, QZ, QK, QX) when required by the payer leads to automatic denial for anesthesia claims.
• Anesthesia time not documented: Many payers require exact start and stop times. A claim with only a duration figure and no timestamps is a denial risk.
• Payer-specific non-payable setting: As noted, some Medicaid programs (including Massachusetts MassHealth for AOH settings) list 01220 as non-payable. Verify payability before submitting.
• Unbundling errors: Billing a separate E&M or pre-anesthesia evaluation code that is included in the base anesthesia service period. The NCCI (National Correct Coding Initiative) edits define what may and may not be unbundled from anesthesia codes.
• Physical status modifier unsupported: Applying P3 or P4 modifiers without corresponding documentation in the pre-anesthesia evaluation triggers medical review or denial.

Practices billing for anesthesia services in orthopedic or plastic surgery EMR environments benefit from having workflows that link modifier selection directly to the supporting documentation, flagging missing fields before claim submission rather than after a denial.

NCCI and bundling considerations

The National Correct Coding Initiative edits apply to CPT 01220 and govern which codes may be billed together on the same date of service. Pre-operative evaluation codes, such as CPT 99211, are generally considered part of the anesthesia service unless the visit occurred on a separate date and was medically distinct. Always review current NCCI tables via the CMS portal before adding ancillary codes to an 01220 claim.

Pairing 01220 with the correct ICD-10 diagnosis code, such as S72.91XH for a closed femur fracture, ensures the claim reflects the full clinical picture rather than just the anesthesia service itself.

Conclusion

Accurate billing for CPT Code 01220 depends on one decision made at the point of documentation: confirming the surgical approach is closed. That distinction separates a clean 01220 claim from a misfiled 01230 submission, and the two-unit base difference between them shows up directly in the reimbursement.

For anesthesia and surgical practices, having a single system capture modifier selections, anesthesia times, and physical status classifications before claims are submitted is what keeps 01220 claims out of the denial queue. To see how Pabau’s claims management workflows fit your practice’s billing process, book a demo.

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