Surgical removal of infected, necrotic, or damaged tissue from the sternum using hand or powered instruments, with wound irrigation; may include wound VAC placement as part of the same operative session.

Verified May 8, 2026 · 6 sources ↓

Medicare: $555.46
Total RVUs: 16.63
Global, days: 90
Region: Other

Drawn from CMSAAPCMdclaritySciencedirectZhealthpublishing

Documentation requirements

What must appear in the operative or office note to support the claim.

Source · Editorial brief grounded in 6 cited references ↓

Operative note must identify the wound as sternal and describe the extent and depth of tissue involved — subcutaneous, fascial, or bone-level involvement
Specify instruments used (hand curettes, powered burr, irrigation) rather than documenting 'standard debridement'
Document the indication clearly: infection, necrosis, dehiscence, or combination — with reference to any preoperative imaging or cultures
Record whether hardware (sternal wires) was removed and whether wound VAC or antibiotic-soaked packing was placed, to support or exclude separate line-item billing
If modifier 78 is appended, the note must establish the relationship between the current procedure and the prior surgery still within its global period
Postoperative diagnosis should align with the ICD-10 code for deep sternal wound infection or dehiscence, not a generic wound complication code

Applicable modifiers

Modifiers commonly billed with this code.

Source · AMA CPT modifier descriptors · CMS NCCI Policy Manual

22 Increased complexity 51 Multiple procedures 59 Distinct service 76 Repeat, same physician 77 Repeat, another physician 78 Unplanned return — related 79 Unrelated during global 80 Assistant surgeon AS PA/NP/CNS assistant

What this code covers

Source · Editorial summary grounded in 6 cited references ↓

CPT 21627 covers operative sternal debridement — opening the chest wound, excising devitalized or infected sternal tissue with hand or powered surgical instruments, irrigating the field, and preparing the site for either primary closure or staged reconstruction. The code is most often triggered by deep sternal wound infection (DSWI) or dehiscence following median sternotomy, most commonly after CABG or valve surgery. Bone does not need to be formally resected for this code to apply; debridement of fibrinous or necrotic soft tissue down to the sternal level qualifies, provided the operative note documents the extent and nature of tissue removed.

Don't confuse 21627 with 21750, which covers closure of median sternotomy separation with or without debridement. If the primary purpose of the return trip to the OR is re-wiring the sternum (including Robicsek weave), 21750 is the correct code, not 21627. When either is performed during the global period of a prior cardiac or thoracic procedure, append modifier 78 — this is an unplanned return to the OR for a complication related to the original surgery. The 90-day global period on 21627 itself means any subsequent debridements staged within that window also require modifier 78 or 79 depending on whether they're related to the index debridement.

Place of service is virtually always inpatient hospital (POS 21) given the post-cardiac-surgery context, though on-campus outpatient (POS 22) billing does occur. Wound VAC application in the same session is generally bundled; document explicitly if additional separately reportable work was performed beyond the debridement itself.

RVU & reimbursement

Component RVUs and Medicare national rate. Actual payment varies by GPCI locality.

Source · CMS Physician Fee Schedule, RVU26A · January 2026

Work RVU	7.12
Practice expense RVU	7.81
Malpractice RVU	1.7
Total RVU	16.63
Medicare national rate	$555.46
Global period	90 days

Payment by site of service

Medicare pays different rates by setting. HOPD typically pays substantially more than ASC for the same procedure.

Source · CMS OPPS Addendum B·ASC HCPCS payment rates·2026

Setting	Medicare rate (national)
Office (PFS non-facility) Procedure performed in physician's office	$555.46
HOPD (APC 5113) Hospital outpatient department	$3,342.87
ASC (PI G2) Ambulatory surgical center (freestanding)	$1,644.87

Common denial reasons

The recurring reasons claims for CPT 21627 get rejected.

Source · Editorial brief grounded in CMS NCCI edits, AAOS coding appeals, and cited references ↓

Billing 21627 when the primary operative intent was sternal re-closure or re-wiring — that maps to 21750, not 21627
Missing modifier 78 when the procedure falls inside the global period of a prior median sternotomy or cardiac surgery case
Operative note documents only superficial wound care or bedside irrigation without establishing operative-level debridement of sternal tissue
Unbundling wound VAC placement as a separate line item when performed in the same operative session as the debridement without documentation supporting distinct service
ICD-10 diagnosis code doesn't support the depth or nature of infection required to justify operative sternal debridement versus wound care management

Frequently asked questions

Source · Generated from the editorial pipeline, verified against 6 cited references ↓

01Does bone have to be removed to bill 21627?

No. Debridement of fibrinous, necrotic, or infected tissue down to the sternal surface qualifies. The operative note needs to document the depth reached and the nature of tissue removed — bone resection is not a prerequisite.

02When should I use 21750 instead of 21627?

Use 21750 when the primary operative purpose is re-closing or re-wiring a separated sternum, including Robicsek weave technique. If the surgeon's goal is debridement of infected or necrotic tissue without formal re-closure, 21627 applies. When in doubt, the operative note's stated purpose drives the code selection.

03Which modifier applies when this is done during the global period of a prior CABG?

Modifier 78 — unplanned return to the OR for a procedure related to the original surgery. Deep sternal wound infection following CABG is directly related, so 78 is correct. Use modifier 79 only if the sternal debridement is genuinely unrelated to the index procedure.

04Can wound VAC placement be billed separately on the same date?

Generally no when placed in the same operative session as 21627. Payers treat it as part of the wound management. If a strong case exists for separate billing, modifier 59 with robust documentation is required, but expect scrutiny.

05Is 21627 ever performed in an ASC setting?

Rarely in practice. The typical patient is post-cardiac-surgery and inpatient. ASC payment does exist under the 2026 fee schedule, but the clinical context (post-CABG, mediastinal infection) almost always means inpatient hospital as the place of service.

06If the same patient needs a second debridement two weeks later, how do I bill it?

Append modifier 78 if the repeat debridement is related to the index sternal wound infection — the 90-day global period on 21627 covers the first procedure, so the follow-on return to the OR requires modifier 78 to get paid. Document the clinical necessity for each return.

Sources & references

Editorial content was developed using the following public sources. Last verified May 8, 2026.

Mira AI Scribe

Mira's AI scribe captures the operative indication (infection, necrosis, dehiscence), depth of tissue involvement, instruments used, any hardware removed, and adjuncts placed (wound VAC, antibiotic packing) directly from surgeon dictation. That level of detail prevents the two most common denials for 21627: notes that look like wound care rather than operative debridement, and missing documentation of the relationship to a prior sternotomy that triggers modifier 78.

See how Mira captures CPT 21627 documentation