20962

Microvascular bone graft harvested from a donor site other than the fibula, iliac crest, or metatarsal, transplanted with its intact arterial and venous supply to fill a major skeletal defect at the recipient site.

Verified May 8, 2026 · 7 sources ↓

Medicare: $2,428.25
Total RVUs: 72.7
Global, days: 90
Region: Other

Drawn from CMSAAPCMdclarityFindacodeBillrazor

Documentation requirements

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

Source · Editorial brief grounded in 7 cited references ↓

Identify the donor site by name and confirm it is not the fibula, iliac crest, or metatarsal — those sites have their own codes (20955–20957).
Describe the arterial and venous pedicle harvested, including vessel names, dimensions, and pedicle length.
Document microvascular anastomosis technique (end-to-end vs. end-to-side) and post-anastomosis perfusion confirmation (Doppler, fluorescein, or clinical assessment).
Specify the recipient site, defect dimensions, and the clinical indication (e.g., segmental bone loss, avascular necrosis, failed prior graft) that necessitated microvascular technique.
Record total operative time and, if modifier 22 is appended, narrate the specific circumstances that added substantial time or complexity beyond the usual procedure.
If two surgeons billed modifier 62, each operative note must independently document distinct surgical roles performed simultaneously.

Applicable modifiers

Modifiers commonly billed with this code.

Source · AMA CPT modifier descriptors · CMS NCCI Policy Manual

22 Increased complexity 50 Bilateral procedure 51 Multiple procedures 59 Distinct service 62 Co-surgeons 76 Repeat, same physician 77 Repeat, another physician 78 Unplanned return — related 79 Unrelated during global

What this code covers

Source · Editorial summary grounded in 7 cited references ↓

CPT 20962 covers a free bone graft procedure in which the surgeon harvests bone from a donor site — excluding the fibula (20955), iliac crest (20956), and metatarsal (20957) — along with the feeding artery and draining vein. The graft is transferred to the defect site and the vessels are anastomosed microsurgically to restore blood flow. That vascular continuity is what distinguishes this from a conventional nonvascularized graft: perfused bone heals faster, incorporates more reliably, and is the preferred option for large segmental defects, avascular necrosis, or failed prior grafting.

The 90-day global period means all routine postoperative care from the day of surgery through day 90 is bundled into this code. Separate E/M visits during that window require modifier 24 for unrelated problems or modifier 79 for unrelated surgical procedures. If the patient returns to the OR for a complication directly tied to the graft — vascular thrombosis, partial flap failure — bill modifier 78 on the return procedure. Modifier 79 applies only if that return procedure is genuinely unrelated to the original graft.

With a total RVU of 72.70, this is one of the highest-weighted codes in the musculoskeletal section, reflecting the microsurgical complexity and operative time involved. HOPD and ASC facility payments differ substantially; see the site-of-service comparison table. Watch for payer-level inpatient-only designations: some commercial payers flag 20962 as inpatient-only even though CMS does not classify it that way under the OPPS inpatient-only list for all settings — verify individual payer policies before scheduling outpatient.

RVU & reimbursement

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

Source · CMS Physician Fee Schedule, RVU26A · January 2026

Work RVU	38.23
Practice expense RVU	26.32
Malpractice RVU	8.15
Total RVU	72.7
Medicare national rate	$2,428.25
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	$2,428.25
HOPD (APC 5114) Hospital outpatient department	$7,413.38
ASC (PI J8) Ambulatory surgical center (freestanding)	$4,682.29

Common denial reasons

The recurring reasons claims for CPT 20962 get rejected.

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

Payer classifies the procedure as inpatient-only and the claim was submitted on an outpatient facility claim — verify policy before scheduling.
Donor site not specified or donor site matches fibula, iliac crest, or metatarsal, triggering a code mismatch with 20955–20957.
Bundling edit fires when 20962 is billed same-day with free-flap codes 15756–15758 or 20969–20973 without a modifier supporting a distinct service.
Missing documentation of microvascular anastomosis — payers deny or downcode when the operative note lacks explicit vessel harvest and re-anastomosis language.
Global period violation: post-op visit billed without modifier 24 or 79, treated as included in the 90-day global bundle.

Frequently asked questions

Source · Generated from the editorial pipeline, verified against 7 cited references ↓

01What makes 20962 different from 20955, 20956, or 20957?

Donor site. Codes 20955–20957 are site-specific: fibula (20955), iliac crest (20956), metatarsal (20957). Use 20962 only when the harvested bone comes from any other location and is transferred with its vascular pedicle intact.

02Can 20962 be billed with free-flap codes like 15756–15758 on the same day?

Not without a modifier. CPT guidelines and NCCI edits restrict reporting 20962 alongside 15756–15758 and 20969–20973 in the same session. If a genuinely distinct and separately reportable service was performed, modifier 59 or an X-modifier with strong documentation may apply — but bundling is the default and payers will deny without it.

03Is 20962 on CMS's inpatient-only list?

CMS does not classify 20962 as inpatient-only under OPPS as of 2026. However, individual commercial payers have issued coverage policies treating it as inpatient-only. Check the specific payer's policy before booking the case as an outpatient — a denial after the fact is much harder to reverse.

04When does modifier 62 apply for two surgeons on 20962?

When the microvascular complexity genuinely requires two equally skilled surgeons operating simultaneously — for example, one preparing the recipient site while the other harvests and anastomoses. Each surgeon bills 20962-62 with a distinct operative note documenting their specific concurrent role. Co-surgeon claims are audited for duplicative documentation, so the notes must differ in meaningful surgical content.

05What global period applies and what does it bundle?

20962 carries a 90-day global. That covers the pre-op visit on the day before surgery, the procedure itself, and all routine follow-up through post-op day 90. E/M visits for unrelated problems during that window require modifier 24. A return to the OR for a complication directly tied to the graft — such as vascular thrombosis — requires modifier 78 on the return procedure code.

06Does modifier 50 apply if the graft was performed bilaterally?

Modifier 50 applies if the identical microvascular bone graft procedure was performed on both sides in the same session. Document each site separately in the operative note. Payer payment rules for bilateral procedures vary — some pay 150% of the single-procedure rate, others cap at 125% or apply a different reduction. Confirm the specific payer's bilateral payment policy before submitting.

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 donor site by anatomical name, vessel pedicle details (artery, vein, dimensions), anastomosis technique, and intraoperative perfusion confirmation directly from dictation. That specificity prevents the most common denial trigger — a note that describes bone transfer without explicitly documenting the microvascular component — and supports modifier 22 if operative complexity or time was substantially increased.

See how Mira captures CPT 20962 documentation