Trigger Finger Release

• State which digit(s) were released and laterality. For billing purposes, match each digit to its correct HCPCS modifier (FA for left thumb, F1-F4 for left index-small, F5 for right thumb, F6-F9 for right index-small). Missing or incorrect digit modifiers cause claim denial for multiple-digit billings.
• Document digital nerve identification and protection. For digits 2–5, document bilateral neurovascular bundle protection. For the thumb, explicitly document radial digital nerve identification — the radial digital nerve of the thumb crosses superficial to the A1 pulley and is the highest-risk structure for iatrogenic injury during thumb trigger release.
• Document A2 pulley identification and preservation. Division of the A2 pulley causes bowstringing — a recognized complication of over-aggressive distal extension of the A1 release. Document: 'the A2 pulley was identified and confirmed intact; it was not divided.'
• Document complete release confirmation with ACTIVE (not only passive) flexion-extension. Active tendon excursion under direct visualization confirms the release is complete and the tendon is not disrupted — particularly important in wide-awake cases where patient can actively flex and extend on command. Passive-only testing can miss subtle incomplete releases.
• Document prior conservative management for medical necessity. Record: number, date(s), and dose of corticosteroid injections; patient response and duration of relief; Quinnell grade; and duration of symptoms. The injection-to-surgery interval should be noted — deep infection risk is increased when surgery follows injection within 90 days; many hand surgeons defer surgery until 90 days after the last injection.
• Document Quinnell grade preoperatively. Quinnell I: uneven movement; II: actively correctable locking; III: passively correctable locking; IV: fixed flexion deformity. Grade IV (fixed contracture) may be an independent surgical indication without requiring prior injection failure. The grade establishes severity and justifies surgical intervention.

• 26055 (tendon sheath incision, e.g., trigger finger; 3.03 wRVU, 90-day global) covers open A1 pulley release at a single digit. This code applies to any digit (thumb or finger) for open surgical release. Document which digit was treated.
• Multiple trigger finger releases at the same session: bill a separate 26055 for each digit, using HCPCS digit modifiers to identify each site — FA (left hand thumb), F1 (left hand, 2nd digit), F2 (left hand, 3rd digit), F3 (left hand, 4th digit), F4 (left hand, 5th digit), F5 (right hand thumb), F6 (right hand, 2nd digit), F7 (right hand, 3rd digit), F8 (right hand, 4th digit), F9 (right hand, 5th digit). FA must be used for the left thumb — FA is a distinct modifier from F1-F4. Digit modifiers are the primary mechanism to differentiate same-code multiple-digit billings. Modifier -51 (multiple procedures) is payer-dependent and is often automatically applied by Medicare's claims system — providers typically do not append -51 themselves for Medicare claims. Medicare applies a multiple-procedure reduction: 100% for the highest-valued procedure, 50% for each additional. Document each digit released individually with separate findings and release confirmation.
• Percutaneous trigger finger release: per AMA CPT Assistant (April 2022 Coding Correction), CPT 26055 describes open A1 pulley release only. Percutaneous release should be reported as CPT 26989 (unlisted procedure, hands or fingers). Do not use 26055 for percutaneous release.
• Steroid injection (20550, 0.73 wRVU, 0-day global) at the same session and same tendon sheath as surgical release is bundled into 26055 and is not separately billable. A steroid injection to a different digit's tendon sheath at the same session may be separately reportable with modifier -59/XS and appropriate digit modifier — document it as a distinct structure with a distinct indication.
• 90-day global period: hand therapy, splinting, suture removal, and routine follow-up are bundled. If a concurrent carpal tunnel release (64721, 4.85 wRVU, 90-day global) is performed at the same session, it is separately billable — document both procedures with individual technique descriptions.
• Bilateral trigger finger (same finger, both hands) — bill 26055 with FA + F5 for thumbs, or F1-F4 + F6-F9 for non-thumb digits. Modifier -50 is generally NOT used for 26055; anatomical modifiers serve this purpose.

General coding reference. Verify with your institution’s billing department before submitting claims.

ⓘ General Billing Tips →