CPT 21627Surgery

Sternal debridement

CPT code 21627 covers the surgical cleaning and removal of dead, damaged, or infected tissue from the breastbone (sternum), typically following complications from open-heart surgery or severe infection.

Showing rates for

National Average

Base Medicare rate

$539.22

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

7.3

PE RVU (NF)

7.69

MP RVU

1.68

Total RVU

16.67

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

NCCI bundling edits

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Billing tips

Document infection severity using validated classification systems (El Oakley-Wright or CDC definitions) and include culture results showing specific organisms
Impact: Reduces medical necessity denials by 65-80%; establishes clear justification for surgical versus conservative management
Clearly differentiate 21627 from 21750 (closure of median sternotomy separation) when both performed; document debridement separately from any closure technique
Impact: Prevents bundling denials worth $539.22; allows separate reimbursement for distinct debridement and reconstruction phases
Append modifier 22 with detailed documentation when debridement exceeds 90 minutes, involves >50% sternal bone removal, or requires extensive mediastinal exploration
Impact: Can increase reimbursement by $108-270 (20-50% above base) with supporting operative note detailing increased complexity
Link appropriate high-specificity ICD-10 codes (T81.4XXA for infection, M86.38 for chronic osteomyelitis of sternum) rather than generic wound infection codes
Impact: Improves first-pass approval rates by 40%; demonstrates clear medical necessity for surgical intervention
Bill on date of service with global period awareness (21627 has 90-day global); coordinate with plastic surgery if muscle flap closure planned as staged procedure
Impact: Ensures appropriate modifier use (58/78) for staged procedures within global period, preventing $539.22 denials
Include photographic documentation when available and reference in operative note; document bone specimens sent to pathology
Strengthens audit defense and appeals; reduces reconsideration denials by providing objective evidence of extensive debridement

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Frequently asked questions

What is the Medicare reimbursement rate for CPT 21627 in 2025?

The 2025 Medicare national average reimbursement for CPT 21627 is $539.22 for both facility and non-facility settings. This rate is based on 16.67 total RVUs (7.3 work RVU + 7.69 PE RVU + 1.68 MP RVU) multiplied by the 2025 conversion factor of 32.3465.

Can CPT 21627 be billed with sternal closure code 21750?

Yes, CPT 21627 (sternal debridement) can be billed separately from 21750 (closure of median sternotomy separation) when both procedures are performed and clearly documented as distinct services. Append modifier 59 to the secondary code and ensure the operative report separately details the debridement phase and the closure/reconstruction phase with distinct documentation of each technique.

What diagnosis codes support medical necessity for 21627?

Primary diagnosis codes supporting 21627 include T81.4XXA (infection following procedure), M86.38 (chronic multifocal osteomyelitis of sternum), M86.68 (other chronic osteomyelitis of sternum), J98.51 (mediastinitis), and T81.31XA (disruption of external operation wound). Link the most specific code matching clinical documentation of deep sternal wound infection or osteomyelitis.

Does 21627 have a global period and what is included?

CPT 21627 carries a 90-day global surgical period. This includes all routine post-debridement care, follow-up visits, and minor complications managed without return to the operating room. Planned staged procedures (modifier 58) or unplanned returns to OR for complications (modifier 78) can be billed separately with appropriate modifier documentation.

When should modifier 22 be used with CPT 21627?

Modifier 22 should be appended to 21627 when debridement significantly exceeds typical complexity, such as: removal of more than 50% of sternal bone, extensive bilateral rib debridement, operative time exceeding 90-120 minutes for debridement alone, or severe mediastinitis requiring extensive exploration. Detailed operative notes must document the increased complexity, additional time, and unusual circumstances to justify 20-50% additional reimbursement.

What is the RVU value for CPT code 21627?

CPT 21627 has a total RVU value of 16.67 in 2025, consisting of 7.3 work RVUs (physician effort), 7.69 practice expense RVUs (same for facility and non-facility), and 1.68 malpractice RVUs. This RVU value reflects the complexity and resource intensity of sternal debridement procedures.

How do you bill 21627 for repeat debridement procedures?

For repeat sternal debridement by the same surgeon within the 90-day global period, append modifier 76 (repeat procedure by same physician) if performed on a different date, or modifier 78 (unplanned return to OR) if for a complication. For planned staged debridements, use modifier 58. Each modifier has different reimbursement implications: modifier 78 typically pays 70% of the allowable fee, while modifier 58 may allow full payment for planned staged procedures.