Hand and Wrist Surgery CPT Codes 2026: Carpal Tunnel, Trigger Finger, CMC Arthroplasty, Dupuytren's, and Ganglion Coding

The most common hand and wrist surgery CPT codes in orthopaedics are 64721 (open carpal tunnel release), 29848 (endoscopic carpal tunnel release), 26055 (trigger finger release), 25000 (de Quervain release), 25447 (CMC interposition arthroplasty), 26121 to 26125 (Dupuytren's fasciectomy), and 25111 (wrist ganglion excision). Correct payment depends on three things coders frequently miss in hand surgery: digit-level F-modifiers and RT/LT laterality, ICD-10 codes that match the exact digit and side, and correct multiple-procedure sequencing when several digits or procedures are done in one session.

Hand surgery is high-volume and relatively low-dollar per case, which makes it easy to under-prioritize. But because the same errors repeat across hundreds of cases a year, small coding mistakes compound into meaningful revenue leakage and avoidable denials.

Carpal Tunnel Release: 64721 vs. 29848

CPT codes

• 64721: Neuroplasty and/or transposition; median nerve at carpal tunnel. Use for open carpal tunnel release, including mini-open techniques.
• 29848: Endoscopy, wrist, surgical, with release of transverse carpal ligament. Use for endoscopic carpal tunnel release.
• 20526: Injection, therapeutic (eg, local anesthetic, corticosteroid), carpal tunnel. Use for carpal tunnel injections in clinic.

ICD-10-CM pairing

• G56.01 Carpal tunnel syndrome, right upper limb
• G56.02 Carpal tunnel syndrome, left upper limb
• G56.03 Carpal tunnel syndrome, bilateral upper limbs

Avoid G56.00 (unspecified upper limb). Unspecified laterality is a common denial trigger, especially with commercial payers that apply laterality edits against RT/LT modifiers.

Common errors

• Coding the wrong approach. If the operative note describes an endoscopic portal and scope, the code is 29848, not 64721. Coders sometimes default to 64721 when the note is ambiguous; the fix is a clear operative note template.
• Bilateral releases. When both sides are released in the same session, report according to the payer's bilateral rules (commonly modifier 50 for Medicare, or RT and LT on separate lines for many commercial payers), and confirm the code's bilateral indicator in the Medicare Physician Fee Schedule.
• Medical necessity documentation. Many commercial payer policies expect documented conservative treatment (splinting, injection, activity modification) and sometimes electrodiagnostic testing before surgery. Missing documentation of these steps is a frequent cause of prior authorization denials.

Trigger Finger Release: 26055 and the F-Modifiers

CPT codes

• 26055: Tendon sheath incision (eg, for trigger finger). Reported once per digit.
• 20550: Injection(s); single tendon sheath, or ligament, aponeurosis. Used for trigger finger injections in clinic.

ICD-10-CM pairing

Trigger finger codes live in category M65.3 and are specific to the digit and the side. For example:

• M65.311 Trigger thumb, right thumb; M65.312 Trigger thumb, left thumb
• M65.321 Trigger finger, right index finger; M65.322 left index finger
• M65.331 Trigger finger, right middle finger; M65.332 left middle finger
• M65.341 Trigger finger, right ring finger; M65.342 left ring finger
• M65.351 Trigger finger, right little finger; M65.352 left little finger

F-modifiers for digit specificity

Medicare and many commercial payers expect digit modifiers on 26055 and other digit-specific procedures:

• Left hand: FA (thumb), F1 (second digit), F2 (third digit), F3 (fourth digit), F4 (fifth digit)
• Right hand: F5 (thumb), F6 (second digit), F7 (third digit), F8 (fourth digit), F9 (fifth digit)

Common errors

• Mismatched digit and diagnosis. A 26055-F7 (right middle finger) paired with M65.321 (right index) will deny or trigger a records request. The F-modifier, the ICD-10 digit, and the operative note must all agree.
• Multiple digits. Report 26055 once per digit, each with its own F-modifier and matching diagnosis. Apply modifier 51 to additional procedures per payer rules. Some payers also require 59 or XS to recognize separate digits; know your payer policies.
• Using RT/LT instead of F-modifiers. For digit-level procedures, F-modifiers are more specific than RT/LT and are what payers expect.

De Quervain's Release: 25000

• CPT 25000: Incision, extensor tendon sheath, wrist (eg, deQuervains disease).
• ICD-10-CM M65.4: Radial styloid tenosynovitis [de Quervain]. Note that M65.4 does not carry laterality in the code itself, so the RT or LT modifier on the CPT code carries that information.
• Injection: A first dorsal compartment injection is typically reported with 20550.

A frequent error is reporting 26055 for a de Quervain release because both are "tendon sheath" procedures. 26055 is for the finger flexor sheath; 25000 is for the wrist extensor compartment.

Thumb CMC Arthroplasty: 25447 and Related Codes

CPT codes

• 25447: Arthroplasty, interposition, intercarpal or carpometacarpal joints. This is the primary code most practices use for trapeziectomy with ligament reconstruction and tendon interposition (LRTI) and similar suspension arthroplasty techniques.
• 25445: Arthroplasty with prosthetic replacement; trapezium. Used when a trapezial implant is placed.
• 25210: Carpectomy; 1 bone. Used for simple trapeziectomy when no interposition or reconstruction is performed.

ICD-10-CM pairing

• M18.0 Bilateral primary osteoarthritis of first carpometacarpal joints
• M18.11 Unilateral primary osteoarthritis of first carpometacarpal joint, right hand
• M18.12 Unilateral primary osteoarthritis of first carpometacarpal joint, left hand
• M18.2 and M18.3- for post-traumatic CMC osteoarthritis

Common errors

• Unbundling tendon work. Tendon harvest, transfer, or suspension performed as part of an LRTI is generally considered part of the arthroplasty. Reporting separate tendon transfer codes alongside 25447 is a common NCCI edit trigger. Only report additional procedures that are distinct and separately documented, such as a concurrent carpal tunnel release.
• Choosing 25210 when the note supports 25447. If the surgeon documents interposition or ligament reconstruction, the higher-value arthroplasty code is supported. This is a classic undercoding pattern.

Dupuytren's Contracture: Fasciectomy, Fasciotomy, and Collagenase

CPT codes

• 26040: Fasciotomy, palmar (eg, Dupuytren's contracture); percutaneous (needle aponeurotomy).
• 26045: Fasciotomy, palmar; open, partial.
• 26121: Fasciectomy, palm only, with or without Z-plasty, other local tissue rearrangement, or skin grafting.
• 26123: Fasciectomy, partial palmar with release of single digit including proximal interphalangeal joint, with or without Z-plasty, other local tissue rearrangement, or skin grafting.
• +26125: Each additional digit (add-on code, list separately in addition to 26123).
• 20527: Injection, enzyme (eg, collagenase), palmar fascial cord.
• 26341: Manipulation, palmar fascial cord (ie, Dupuytren's cord), post enzyme injection, single cord.

ICD-10-CM pairing

M72.0 Palmar fascial fibromatosis [Dupuytren]. M72.0 has no laterality, so the side and digits are communicated through modifiers.

Common errors

• Missing the add-on code. When multiple digits are released, 26125 should be reported for each additional digit beyond the first. Missing add-ons is a direct revenue loss, and add-on codes are not subject to the multiple procedure reduction.
• Billing the collagenase drug. When the practice purchases the collagenase product, the drug is reported separately with the appropriate HCPCS J-code and units. This is often missed when the injection and manipulation are coded on different days.
• Manipulation timing. 26341 is reported on the date the manipulation is performed, which is often a separate visit after the injection. Track both dates so neither service is lost.

Wrist Ganglion Excision: 25111 and 25112

• 25111: Excision of ganglion, wrist (dorsal or volar); primary.
• 25112: Excision of ganglion, wrist; recurrent.
• 26160: Excision of lesion of tendon sheath or joint capsule (eg, cyst, mucous cyst, or ganglion), hand or finger.
• ICD-10-CM: M67.431 Ganglion, right wrist; M67.432 Ganglion, left wrist; M67.44- for ganglion of the hand.

Use 25112 only when the note documents a prior excision at the same site. Using 26160 for a wrist ganglion, or 25111 for a finger mucous cyst, is a common location mismatch.

Cubital Tunnel and Combined Nerve Releases

• 64718: Neuroplasty and/or transposition; ulnar nerve at elbow.
• 64719: Neuroplasty and/or transposition; ulnar nerve at wrist.
• ICD-10-CM: G56.21 Lesion of ulnar nerve, right upper limb; G56.22 left upper limb.

Combined carpal tunnel and cubital tunnel releases on the same arm are separately reportable when both are documented, with modifier 51 on the secondary procedure. Pair each CPT code with its own diagnosis pointer.

Global Periods and E&M in Hand Surgery

Most hand surgical codes, including 64721, 29848, 26055, 25000, 25447, 26123, and 25111, carry a 90-day global period under Medicare. That has two practical implications:

• The E&M visit where the decision for surgery is made, if it occurs the day before or the day of surgery, requires modifier 57 to be paid separately.
• A separate problem treated during the global period (for example, a trigger finger injection on the opposite hand during a carpal tunnel global) requires modifier 24 on the E&M and appropriate documentation, and a new unrelated procedure requires modifier 79.

Injection codes like 20526 and 20550 have a 0-day global. When an injection and a significant, separately identifiable E&M service occur on the same day, modifier 25 on the E&M is required, and the documentation must support work beyond the usual pre-procedure evaluation. Our Modifier 25 and 59 guide covers this in detail.

How Documentation Drives Hand Surgery Payment

Nearly every error above traces back to the operative note or clinic note. A strong hand surgery note template should always include:

• Side and specific digit(s) for every procedure
• Approach (open, endoscopic, percutaneous)
• Every distinct procedure performed, including any add-on digits
• Implant or drug used, with lot and units where applicable
• Conservative treatment history and failed therapies, for prior authorization support

This is exactly where AI coding earns its keep in hand surgery. Maia's AutoCoder reads the operative note inside the EHR and assigns the CPT code, F-modifier or laterality modifier, matching ICD-10 code, and add-on codes before a coder touches the chart. Mismatches between digit, diagnosis, and modifier get flagged instead of denied.

Frequently Asked Questions

What is the CPT code for carpal tunnel release?

Open carpal tunnel release is reported with CPT 64721 (neuroplasty and/or transposition; median nerve at carpal tunnel). Endoscopic carpal tunnel release is reported with CPT 29848. Pair either with G56.01, G56.02, or G56.03 depending on laterality.

How do you code multiple trigger finger releases?

Report CPT 26055 once per digit, each with the correct F-modifier (FA and F1 to F4 for the left hand, F5 to F9 for the right) and a matching M65.3- diagnosis code. Apply modifier 51 to additional procedures, and use 59 or XS if the payer requires it for separate digits.

What CPT code is used for thumb CMC arthroplasty (LRTI)?

Most practices report CPT 25447 (arthroplasty, interposition, intercarpal or carpometacarpal joints) for trapeziectomy with ligament reconstruction and tendon interposition. Tendon work integral to the procedure is generally not separately reportable. Use 25445 when a trapezial prosthesis is placed.

What is the ICD-10 code for Dupuytren's contracture?

Dupuytren's contracture is coded M72.0 (palmar fascial fibromatosis). Because it has no laterality, communicate side and digits with modifiers on the CPT codes, such as 26123 and the add-on 26125 for each additional digit.

What global period applies to hand surgery codes?

Most hand and wrist surgical codes, including carpal tunnel release, trigger finger release, CMC arthroplasty, and Dupuytren's fasciectomy, have a 90-day global period under Medicare. Injections such as 20526 and 20550 have a 0-day global.

Why do hand surgery claims get denied most often?

The most common causes are laterality or digit mismatches between the CPT modifier and ICD-10 code, unbundling of procedures considered integral (such as tendon work in LRTI), missing prior authorization documentation of conservative treatment, and missing modifiers 57, 24, or 79 around the global period.

The Bottom Line

Hand surgery coding rewards precision. Match the digit, side, and diagnosis on every line; capture every add-on digit; know which tendon work is bundled; and manage modifiers around the 90-day global. Get those right and a high-volume, often overlooked service line stops leaking revenue.

See how Maia's AutoCoder handles this automatically for orthopaedic practices. Book a demo at usemaia.com.