Carpal Tunnel Release

CPT 64721
Approach Open
Add-on / Variant CPTs
  • 29848 — Endoscopic carpal tunnel release
Preoperative Diagnosis:

Right [left] carpal tunnel syndrome, [mild / moderate / severe], confirmed on nerve conduction study

Postoperative Diagnosis:

Same

Procedure Performed:

Right [left] open [/ endoscopic] carpal tunnel release

Attending Surgeon:

[Attending name], MD/DO

First Assistant:

[Tech/nurse name]

Anesthesia:

Wide-awake local anesthesia no tourniquet (WALANT): [X] mL 1% lidocaine with 1:100,000 epinephrine [/ regional block with forearm tourniquet]

Indications:

The patient is a [age]-year-old [male/female] with right [left] carpal tunnel syndrome presenting with [nocturnal paresthesias / thenar wasting / positive Tinel / positive Phalen] refractory to conservative management including splinting and corticosteroid injections. Nerve conduction study confirmed [mild / moderate / severe] median neuropathy at the wrist. The risks, benefits, and alternatives were discussed and informed consent was obtained.

Findings:

The transverse carpal ligament was [thickened / normal in appearance]. The median nerve was [flattened / pseudoneuroma at the proximal edge of the TCL / pale / appearing compressed]. Following ligament division, the nerve decompressed visually and [the recurrent motor branch was identified and protected]. No masses or tenosynovitis were identified within the carpal tunnel.

Description of Procedure:

The patient was positioned supine with the operative hand on a hand table. [WALANT: local anesthesia was injected 30 minutes prior to the procedure.] [Tourniquet: a forearm tourniquet was inflated to [250] mmHg after exsanguination with an Esmarch bandage.]

A longitudinal [palmar / thenar crease] incision approximately [2–3] cm in length was made ulnar to the thenar crease, in line with the ring finger axis. Skin and subcutaneous tissue were divided with care to protect the palmar cutaneous branch of the median nerve. The palmar fascia was incised.

The distal edge of the transverse carpal ligament was identified by blunt dissection. The ligament was divided from distal to proximal under direct vision with scissors [/ scalpel], protecting the median nerve at all times. Proximally, the antebrachial fascia was released for [2 cm]. Complete release was confirmed by visualizing the fat of the palm distally and the forearm fascia proximally, with the median nerve fully decompressed.

[Thenar motor branch was identified and found intact.] [Tenosynovectomy was performed for [synovitis / rheumatoid disease].] The wound was irrigated. Skin was closed with [4-0 nylon / 3-0 Monocryl] interrupted sutures. A soft dressing was applied.

Complications:

None

Specimens:

[Tenosynovium sent to pathology if obtained]

Estimated Blood Loss:

Minimal

Drains:

None

Disposition:

The patient tolerated the procedure well. Finger range of motion was permitted immediately. Sutures were to be removed at [10–14 days]. Return to light activity was permitted at [2 weeks], full activity at [4–6 weeks]. Expected symptom improvement occurs over days to weeks. Thenar atrophy may recover over months.

Epic SmartPhrase Version 
PREOPERATIVE DIAGNOSIS: Right/Left carpal tunnel syndrome, ***
POSTOPERATIVE DIAGNOSIS: Same
PROCEDURE PERFORMED: Right/Left open carpal tunnel release
ATTENDING: ***, MD/DO
ASSISTANT: ***
ANESTHESIA: WALANT / regional + tourniquet

INDICATIONS: .PTAGE-year-old .PTSEX with *** CTS, failed splinting/injection. NCS: ***. Consent obtained.

FINDINGS: TCL thickened/***. Median nerve: flattened/***. Recurrent motor branch identified, intact. No masses/tenosynovitis.

PROCEDURE:
Supine, hand table. WALANT/tourniquet ***. Longitudinal palmar incision *** cm, ulnar to thenar crease. Palmar cutaneous branch protected. Palmar fascia incised. TCL divided distal to proximal under direct vision. Antebrachial fascia released *** cm. Complete release confirmed — palmar fat distally, forearm fascia proximally. Nerve decompressed. Motor branch intact. Wound irrigated. Skin closed ***. Soft dressing.

EBL: Minimal
COMPLICATIONS: None
DISPOSITION: Immediate finger ROM. Sutures out 10–14 days. Light activity 2 weeks.

Signed: .ME, .MYDEGREE
.TODAY
Variants

Endoscopic Carpal Tunnel Release (Single-Portal)

A [1.5]-cm transverse incision was made at the wrist flexion crease, ulnar to the palmaris longus. The carpal canal was entered bluntly with a synovial elevator. The endoscopic cannula (Chow single-portal / Agee system) was inserted with the camera confirming placement beneath the TCL. The transverse carpal ligament was divided from within using the hooked blade under direct endoscopic visualization. Complete release was confirmed by visualizing the fat overlying the TCL completely divided. Endoscopic release is associated with faster return to work and grip strength recovery; open release is preferred when anatomy is uncertain or revision is performed.

Charting Tips
  • Document identification and protection of the recurrent motor branch (thenar branch) of the median nerve. Injury to this branch causes permanent thenar weakness. Document 'thenar motor branch identified and protected' or note its anatomic variant (extraligamentous vs. subligamentous vs. transligamentous) if encountered.
  • Document the extent of proximal release. Inadequate proximal release of the antebrachial fascia is a common cause of failed carpal tunnel release (persistent symptoms). Document that the forearm fascia was released for an appropriate distance (1–2 cm).
  • For WALANT technique, document the epinephrine-containing local anesthetic and that adequate time (at least 20–30 minutes) was allowed for vasoconstriction before incision. This ensures a bloodless field and justifies not using a tourniquet.
Billing Tips
  • Bill 64721 for carpal tunnel release (4.85 wRVU, 90-day global). Use for both open and endoscopic carpal tunnel release. Technique does not change the CPT code.
  • For bilateral carpal tunnel release performed at the same setting, bill 64721 twice with modifier -50 (bilateral). Document each hand separately with individual nerve findings.
  • 90-day global period: splint management, suture removal, and routine follow-up are bundled. Formal occupational therapy for hand rehabilitation is billed by the therapist independently.
  • Electrodiagnostic studies (nerve conduction study, EMG) performed preoperatively are billed at the time of the test by the interpreting physician and are not bundled into the surgical fee.
  • Combined carpal tunnel release with trigger finger release (26055) or wrist ganglion excision (25111) at the same session: bill both with modifier -51 on the secondary procedure. Document each procedure distinctly.