Arthroplasty of a single metacarpophalangeal joint using a prosthetic implant — one code per joint revised.
Verified May 8, 2026 · 6 sources ↓
- Medicare
- $588.19
- Total RVUs
- 17.61
- 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 ↓
- Specify which MCP joint(s) by ray number (e.g., index, long, ring, small finger)
- Name the implant type, manufacturer, lot number, and size placed
- Document the surgical approach and extent of bone resection performed
- Record the preoperative diagnosis (deformity, RA, post-traumatic arthritis, etc.) and functional deficit
- Confirm laterality (right vs. left hand) and number of joints addressed in the operative note
- Include intraoperative or post-op imaging if used to confirm implant seating
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 26531 covers MCP joint arthroplasty with prosthetic implant placement at a single knuckle. The surgeon opens the joint, resects the articulating portion of the metacarpal head, and seats a silicone or other prosthetic spacer to restore joint mechanics, reduce deformity, and relieve pain. When multiple MCP joints are revised in the same session, bill 26531 for each joint with modifier 51 appended to the additional units.
This code sits in the 90-day global period. All routine post-op management — wound checks, dressing changes, suture removal, and related E/M visits — is bundled from the day before surgery through day 90. Unrelated problems treated in that window require modifier 24 on the E/M; a staged or planned related procedure in the global requires modifier 58; an unplanned return for a related complication requires modifier 78.
Don't confuse 26531 with 26530, which covers MCP arthroplasty without an implant. If a silicone or prosthetic device is placed, 26531 is correct. Document implant type, lot number, and manufacturer in the operative note — implant records are an audit staple for joint arthroplasty codes regardless of anatomic site.
RVU & reimbursement
Component RVUs and Medicare national rate. Actual payment varies by GPCI locality.
Source · CMS Physician Fee Schedule, RVU26A · January 2026
| Work RVU | 7.93 |
| Practice expense RVU | 8.19 |
| Malpractice RVU | 1.49 |
| Total RVU | 17.61 |
| Medicare national rate | $588.19 |
| 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 | $588.19 |
HOPD (APC 5114) Hospital outpatient department | $7,413.38 |
ASC (PI J8) Ambulatory surgical center (freestanding) | $5,002.82 |
Common denial reasons
The recurring reasons claims for CPT 26531 get rejected.
Source · Editorial brief grounded in CMS NCCI edits, AAOS coding appeals, and cited references ↓
- Billing 26531 for a toe MCP joint — this code is hand-only; toe procedures require an unlisted code
- Missing implant documentation (type, lot, manufacturer) triggering medical necessity or coding accuracy audits
- Unbundling 26530 and 26531 for the same joint in the same session — only one arthroplasty code applies per joint
- Failure to append modifier 51 when multiple MCP joints are revised same-day, causing payer system rejections
- Insufficient diagnosis specificity — ICD-10 must identify the joint, laterality, and underlying condition
- Post-op E/M visits billed without modifier 24, denied as bundled into the 90-day global
Frequently asked questions
Source · Generated from the editorial pipeline, verified against 6 cited references ↓
01Can I bill 26531 multiple times if I revise three MCP joints in the same session?
02What's the difference between 26530 and 26531?
03Can 26531 be billed for a toe joint?
04What global period applies, and what's bundled into it?
05Is modifier 50 appropriate for bilateral MCP arthroplasty?
06When does modifier 22 apply to 26531?
07What ICD-10 codes commonly pair with 26531?
Sources & references
Editorial content was developed using the following public sources. Last verified May 8, 2026.
- 01CMS Physician Fee Schedule 2026
- 02aapc.comhttps://www.aapc.com/codes/cpt-codes/26531
- 03mdclarity.comhttps://www.mdclarity.com/cpt-code/26531
- 04fastrvu.comhttps://fastrvu.com/cpt/26531
- 05aaos.orghttps://www.aaos.org/quality/coding-and-reimbursement/
- 06eatonhand.comhttp://www.eatonhand.com/coding/n26531.htm
Mira AI Scribe
Mira's AI scribe captures joint-level detail from dictation: which MCP ray was revised, implant name and lot number, extent of bone resection, and surgical approach. It flags notes that reference 'standard approach' without naming it and prompts the surgeon to confirm laterality and implant manufacturer before the note is finalized. That prevents the two most common audit triggers for 26531 — missing implant records and nonspecific approach language.
See how Mira captures CPT 26531 documentation