Arthroplasty of a metacarpophalangeal (MCP) joint involving resection of part or all of the metacarpal head and placement of a soft-tissue interposition spacer to correct deformity, reduce inflammation, and restore knuckle function.
Verified May 8, 2026 · 6 sources ↓
- Medicare
- $509.70
- Total RVUs
- 15.26
- Global, days
- 90
- Region
- Hand
Documentation requirements
What must appear in the operative or office note to support the claim.
Source · Editorial brief grounded in 6 cited references ↓
- Identify the specific MCP joint(s) by digit number and laterality (e.g., right index finger MCP joint)
- Confirm that no prosthetic implant was inserted — placement of an implant shifts the correct code to 26531
- Document the type of interposition material used (e.g., fascia, tendon, capsule) and its source
- State the clinical indication: deformity type, prior surgeries, inflammatory arthritis diagnosis, or post-traumatic arthrosis
- Describe the surgical approach, incision location, and extent of metacarpal resection (partial vs. complete head excision)
- Record intraoperative findings including joint destruction severity and any concomitant soft-tissue procedures performed
Applicable modifiers
Modifiers commonly billed with this code.
Source · AMA CPT modifier descriptors · CMS NCCI Policy Manual
What this code covers
Source · Editorial summary grounded in 6 cited references ↓
CPT 26530 covers MCP joint arthroplasty performed via open incision and dissection to the joint, followed by partial or complete resection of the metacarpal articulation and soft-tissue interposition — without implant insertion. If a prosthetic implant is placed, report 26531 instead. The procedure targets deformity correction, pain relief, and functional restoration, most commonly in patients with rheumatoid arthritis, post-traumatic arthrosis, or failed prior joint surgery.
The code carries a 90-day global period. That window covers the day-before visit, the surgery itself, and all routine post-op care through day 90. Unrelated E&M services during the global require modifier 24; staged or related returns to the OR require modifier 78. Unrelated procedures during the global period require modifier 79.
When multiple MCP joints are addressed in the same operative session, modifier 51 applies to the additional joint procedures. If the same procedure is performed bilaterally, report with modifier 50 for professional claims; ASC facilities should report on two separate claim lines using LT and RT per CMS NCCI 2026 Chapter 4 bilateral reporting rules.
RVU & reimbursement
Component RVUs and Medicare national rate. Actual payment varies by GPCI locality.
Source · CMS Physician Fee Schedule, RVU26A · January 2026
| Work RVU | 6.71 |
| Practice expense RVU | 7.27 |
| Malpractice RVU | 1.28 |
| Total RVU | 15.26 |
| Medicare national rate | $509.70 |
| 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 | $509.70 |
HOPD (APC 5114) Hospital outpatient department | $7,413.38 |
ASC (PI J8) Ambulatory surgical center (freestanding) | $4,977.04 |
Common denial reasons
The recurring reasons claims for CPT 26530 get rejected.
Source · Editorial brief grounded in CMS NCCI edits, AAOS coding appeals, and cited references ↓
- Upcoding flag: 26531 billed when operative note documents soft-tissue interposition only, with no implant placed — should be 26530
- Missing laterality and digit specificity, triggering claim edits or requests for additional documentation
- Modifier 51 omitted when multiple MCP joints are addressed in the same session, causing duplicate-procedure edits
- Routine post-op E&M services billed without modifier 24 during the 90-day global, resulting in automatic bundling denials
- Medical necessity not established — diagnosis code fails to link inflammatory arthritis, arthrosis, or prior joint failure to the procedure
Frequently asked questions
Source · Generated from the editorial pipeline, verified against 6 cited references ↓
01What is the difference between 26530 and 26531?
02Can I bill 26530 for multiple fingers on the same hand in one session?
03How should bilateral MCP arthroplasty be reported?
04Does the 90-day global period affect follow-up billing for rheumatology co-management?
05When is modifier 78 appropriate for 26530?
06Is 26530 typically performed in a facility or ASC setting, and does it affect payment?
07Can 26530 and 26531 be billed together for the same joint on the same day?
Sources & references
Editorial content was developed using the following public sources. Last verified May 8, 2026.
- 01CMS Physician Fee Schedule 2026
- 02fastrvu.comhttps://fastrvu.com/cpt/26530
- 03cms.govhttps://www.cms.gov/files/document/04-chapter4-ncci-medicare-policy-manual-2026-final.pdf
- 04aapc.comhttps://www.aapc.com/codes/cpt-codes/26530
- 05mdclarity.comhttps://www.mdclarity.com/cpt-code/26530
- 06aaos.orghttps://www.aaos.org/globalassets/quality-and-practice-resources/coding-and-reimbursement/resident-guide/resident-guide-coding-reference-tools_what-is-ncci-ptp.pdf
Mira AI Scribe
Mira's AI scribe captures the digit number, laterality, type and source of interposition material, extent of metacarpal resection, and explicit confirmation that no prosthetic implant was placed. That last detail is critical — if the note doesn't affirmatively exclude an implant, auditors will question whether 26531 should have been billed instead, opening the claim to downcoding or investigation.
See how Mira captures CPT 26530 documentation