Free toe joint transfer to the hand using microvascular anastomosis, replacing a finger joint destroyed by trauma or congenital deformity.

Verified May 8, 2026 · 7 sources ↓

Medicare: $3,079.90
Total RVUs: 92.21
Global, days: 90
Region: Hand

Drawn from CMSBedrockbillingAAPCBeonbrandEmedny

Documentation requirements

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

Source · Editorial brief grounded in 7 cited references ↓

Diagnosis driving the transfer: specify whether trauma, congenital deformity, or post-oncologic resection
Operative note must identify the donor toe joint harvested and the recipient finger joint by name and ray number
Document microvascular anastomosis technique, including vessels anastomosed and patency confirmation
Record involvement of two surgeons with distinct roles if billing modifier 62 — each surgeon must dictate their own operative note
Document use of operating microscope if billing 69990 as an add-on
Bone graft procurement site and method should be specified in the operative note

Applicable modifiers

Modifiers commonly billed with this code.

Source · AMA CPT modifier descriptors · CMS NCCI Policy Manual

22 Increased complexity 24 Unrelated E/M during global 51 Multiple procedures 58 Staged or related 62 Co-surgeons 78 Unplanned return — related 79 Unrelated during global 80 Assistant surgeon LT Left side RT Right side

What this code covers

Source · Editorial summary grounded in 7 cited references ↓

26556 covers harvest of a toe joint — including its associated vessels, nerves, bone, and tendons — and transplantation to a hand digit using microvascular techniques. The procedure is indicated when a finger joint is non-salvageable due to trauma, tumor resection, or congenital absence, and the goal is functional joint restoration rather than fusion or prosthetic replacement. Microvascular anastomosis is intrinsic to the code; operating microscope use (69990) may be reported separately without modifier 51 per CPT guidelines.

This is a high-complexity, high-RVU procedure with a 90-day global period. Both a hand surgeon and a foot surgeon are commonly involved — the two-surgeon model (modifier 62) is appropriate when each operates in a distinct field simultaneously. The procedure has historically carried an inpatient-only designation under Medicare HOPD rules; confirm current site-of-service status before scheduling in an ASC. NCCI edits bundle codes 0312T, 0313T, 0314T, 0315T, and 0316T into 26556 — do not report those add-on nerve monitoring codes alongside it.

RVU & reimbursement

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

Source · CMS Physician Fee Schedule, RVU26A · January 2026

Work RVU	48.51
Practice expense RVU	33.33
Malpractice RVU	10.37
Total RVU	92.21
Medicare national rate	$3,079.90
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	$3,079.90
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 26556 get rejected.

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

Site-of-service mismatch — procedure has carried inpatient-only status under Medicare HOPD rules; verify current status before billing facility
Missing microvascular documentation — payers deny 26556 when the operative note lacks explicit anastomosis detail, downcoding to a simpler transfer code
Incorrect bundling of co-surgeon claims — modifier 62 denied when both surgeons' notes do not clearly delineate separate operative roles
NCCI edit denial for billing 0312T–0316T alongside 26556 — those intraoperative nerve monitoring add-ons are bundled and cannot be unbundled
Global period conflict — post-op visits or related procedures billed without modifier 24, 78, or 79 during the 90-day global window

Frequently asked questions

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

01Can 26556 be performed in an ASC under Medicare?

26556 has historically appeared on CMS's inpatient-only list for HOPD. Check the current CMS OPPS Addendum E each year — inpatient-only status can change. Performing this in an ASC without confirming current status risks a site-of-service denial with no appeal pathway.

02When is modifier 62 appropriate for 26556?

Use modifier 62 when a hand surgeon and a foot/plastic surgeon each perform distinct, simultaneous operative work — one harvesting the donor toe joint while the other prepares the recipient hand site. Both surgeons must bill 26556-62 and each must submit an independent operative note documenting their specific role.

03Can 69990 (operating microscope) be billed with 26556?

Yes. CPT guidelines allow 69990 as an add-on without modifier 51 when microsurgical technique is used. The operative note must explicitly state that microsurgical dissection and anastomosis were performed under the microscope — a generic reference to magnification is not sufficient.

04What NCCI edits apply to 26556?

CMS NCCI bundles codes 0312T, 0313T, 0314T, 0315T, and 0316T into 26556. Those intraoperative nerve monitoring add-ons cannot be reported alongside this code. Bone graft harvest codes 20900 and 20902 are not listed as bundled edits for 26556, unlike for adjacent toe-to-hand transfer codes — confirm in the current NCCI table.

05How does the 90-day global period affect post-op billing?

All routine follow-up, wound checks, suture removal, and splint changes through day 90 are included in the global. Bill unrelated E/M services with modifier 24. A staged revision in the global window needs modifier 58. An unplanned return for a complication related to the original transfer uses modifier 78; unrelated OR procedures use modifier 79.

06Is modifier 50 ever correct for 26556?

Theoretically yes if joints on both feet are harvested for bilateral hand reconstruction, but that clinical scenario is exceedingly rare. Document bilaterality explicitly in the operative note and expect payer scrutiny — most payers will require prior authorization for bilateral reporting.

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 (toe and ray), recipient finger joint and ray, vessels anastomosed during microvascular repair, confirmation of flap perfusion, and whether a bone graft was used and from where. It also flags co-surgeon involvement for modifier 62 routing. That prevents downcoding to a non-microsurgical transfer code and stops global-period denials by timestamping the procedure against any same-day E/M or post-op visit.

See how Mira captures CPT 26556 documentation