CPT 15620Surgery

Delay flap f/c/c/n/ax/g/h/f

CPT code 15620 covers a delayed flap procedure where surgeons elevate and partially detach skin and tissue from areas like the face, scalp, neck, arms, or legs, leaving it attached at one end to maintain blood supply before final transfer. This preparatory surgery improves the success rate when moving tissue to reconstruct damaged areas.

Showing rates for

National Average

Base Medicare rate

$436.68

This calculator gives a typical-case estimate using standard Medicare modifier rules. Actual payment depends on payer policies, documentation, code-specific CMS status indicators, and locality. Verify before billing.

RVU breakdown

Work RVU

3.75

PE RVU (NF)

9.15

MP RVU

0.6

Total RVU

13.5

Conversion factor: 32.3465 · Source: CMS MPFS RVU25A · Confidence: High

NCCI bundling edits

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Billing tips

Document the specific anatomical location from the code descriptor (face, chin, cheek, neck, axilla, genitalia, hands, feet) precisely in the operative report header and body
Impact: Prevents denials for incorrect code selection; anatomical specificity is the primary determinant between 15620 and other delayed flap codes, protecting the full $436.68 non-facility payment
Clearly document the delay technique including incision patterns, flap elevation extent, and pedicle preservation details to differentiate from immediate flap transfer codes (15574-15738)
Impact: Prevents downcoding to evaluation codes or denials for lack of medical necessity; the delay technique justification supports the 3.75 work RVU value
Bill facility vs. non-facility based on actual place of service; ASCs and hospital outpatient departments are facility settings ($322.49), while office-based surgical suites may qualify for non-facility rates ($436.68)
Impact: Ensures accurate payment differential of $114.19 per procedure; incorrect POS codes trigger automatic payment adjustments and potential audits
When planning staged reconstruction, document the delay procedure and anticipated transfer date in the operative note to support modifier 58 use for the subsequent flap transfer procedure
Impact: Prevents global period bundling of the definitive flap transfer; proper staging documentation can preserve $800-2000+ in revenue for the second stage depending on final flap code
Verify the flap size does not exceed the anatomical regions covered by 15620; larger or different anatomical areas require 15630 (forehead, cheek, chin, mouth, neck) or other appropriate codes
Impact: Using the correct delayed flap code prevents downcoding penalties of up to 30-40% in reimbursement; 15630 may have different RVU values and payment rates

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Common denials

Denial for 'procedure not separately payable' when billed with definitive flap transfer codes during the same operative session without appropriate modifier

How to appeal: Submit appeal with operative report highlighting that 15620 represents a distinct preliminary delay procedure at a different time or anatomical area than the flap transfer. If same session, demonstrate medical necessity for both immediate and delayed flaps at different sites, with modifier 59 documentation. Include anatomical diagrams showing separate flap locations.

Medical necessity denial questioning why a delayed flap approach was chosen over immediate tissue transfer

How to appeal: Provide clinical rationale documenting factors requiring staged approach: compromised wound bed vascularity, prior radiation therapy, large defect size requiring enhanced flap survival, patient comorbidities affecting healing, or previous flap failure. Include peer-reviewed literature supporting delay technique for the specific clinical scenario and patient risk factors.

Incorrect code denial suggesting 15620 should be reported with a different delayed flap code based on anatomical location documentation discrepancies

How to appeal: Cross-reference operative report anatomical descriptions with CPT code descriptors for 15620 vs. 15630 and other delayed flap codes. Submit anatomical diagram with highlighted procedure site. Include clarification addendum from surgeon if operative note lacks specific anatomical terminology matching CPT descriptor requirements.

Global period bundling when billing subsequent flap transfer without modifier 58, with payer stating the transfer is included in the delay procedure payment

How to appeal: Demonstrate that flap delay (15620) and subsequent transfer are distinct, planned staged procedures per CPT guidelines. Submit both operative reports showing different dates and procedures, pre-operative plan documenting staged approach, and modifier 58 with clear explanation. Cite CPT Assistant guidance on staged flap procedures and planned return to OR.

Frequently asked questions

What is the Medicare reimbursement rate for CPT code 15620 in 2025?

The 2025 Medicare national average reimbursement for CPT 15620 is $436.68 in non-facility settings and $322.49 in facility settings (hospitals and ASCs). The actual payment may vary by geographic location based on local Medicare Administrative Contractor (MAC) adjustments.

What is the difference between CPT 15620 and immediate flap transfer codes?

CPT 15620 describes a delayed flap procedure where tissue is partially elevated and left attached to condition the blood supply over time before final transfer, while immediate flap codes (15574-15738) describe single-stage procedures where tissue is transferred immediately. The delay technique is a separate preparatory surgery performed days to weeks before the definitive transfer.

Can CPT 15620 be billed with the subsequent flap transfer procedure?

Yes, but the subsequent flap transfer must be billed with modifier 58 to indicate it is a planned staged procedure following the delay. The transfer is typically performed 1-3 weeks after the delay procedure and uses a different CPT code based on the final flap type and location. Without modifier 58, the transfer may be denied as included in the global period of 15620.

What anatomical areas are covered by CPT code 15620?

CPT 15620 covers delayed flap procedures on the face, chin, cheek, neck, axilla (armpit), genitalia, hands, and feet. Different delayed flap codes exist for other anatomical regions; using the wrong code based on anatomical location is a common cause of denials and downcoding.

How many work RVUs is CPT 15620 assigned for 2025?

CPT 15620 has a work RVU value of 3.75 for 2025, with total RVUs of 13.5 when including practice expense (9.15 non-facility, 5.62 facility) and malpractice (0.6) components. The work RVU reflects the physician time, technical skill, and mental effort required for the delayed flap preparation procedure.

Is CPT 15620 considered an outpatient or inpatient procedure?

CPT 15620 can be performed in either outpatient or inpatient settings depending on patient factors and facility capabilities. It is commonly performed in hospital outpatient departments, ambulatory surgery centers, or office-based surgical suites. The place of service determines whether facility ($322.49) or non-facility ($436.68) Medicare rates apply.

What documentation is needed to support medical necessity for CPT 15620?

Documentation must justify why a delayed flap approach is necessary rather than immediate transfer, including factors such as compromised recipient site vascularity, large defect size, prior radiation, patient comorbidities, or previous flap failure. The operative note must detail the specific delay technique, flap dimensions, pedicle preservation, and planned timing for subsequent transfer to support the medical necessity and proper code selection.