Arthroscopy · Wrist

29848

Endoscopic surgical release of the transverse carpal ligament performed through the wrist using a small camera and specialized cutting instruments.

Verified May 8, 2026 · 6 sources ↓

Medicare
$485.65
Total RVUs
14.54
Global, days
90
Region
Wrist
Drawn from CMSAAPCPayerpriceEatonhand

Documentation requirements

What must appear in the operative or office note to support the claim.

Source · Editorial brief grounded in 6 cited references ↓

  • Confirmed diagnosis of carpal tunnel syndrome with supporting nerve conduction study or EMG documenting median nerve compression
  • Documentation of failed conservative treatment (splinting, NSAIDs, corticosteroid injection, occupational therapy) prior to surgical intervention
  • Operative note specifying endoscopic approach, instruments used, visualization of transverse carpal ligament, and confirmation of complete ligament release
  • Laterality documented explicitly in both the pre-op note and operative report (left, right, or bilateral)
  • Anesthesia type recorded (local, regional, or sedation) along with patient positioning and tourniquet use if applicable
  • Post-op note confirming neurovascular status of the hand immediately following the procedure

Applicable modifiers

Modifiers commonly billed with this code.

Source · AMA CPT modifier descriptors · CMS NCCI Policy Manual

22 Increased complexity 25 Significant separate E/M 50 Bilateral procedure 51 Multiple procedures 52 Reduced services 58 Staged or related 59 Distinct service 76 Repeat, same physician 77 Repeat, another physician 78 Unplanned return — related 79 Unrelated during global LT Left side RT Right side

What this code covers

Source · Editorial summary grounded in 6 cited references ↓

CPT 29848 describes endoscopic carpal tunnel release — a minimally invasive wrist surgery in which the surgeon inserts an endoscope through a small wrist incision to visualize and divide the transverse carpal ligament, decompressing the median nerve. The procedure is performed under local anesthesia or light sedation, typically in an ASC or outpatient hospital setting, and takes approximately 20–30 minutes. It is the dominant use case for this code; wrist endoscopy for other indications is comparatively rare.

The 90-day global period covers the procedure, the day-before visit, and all routine postoperative care through day 90. Any E/M service on the day of surgery requires modifier 25 on the E/M to survive NCCI scrutiny. Bilateral same-day release is billed with modifier 50 on a single line; the bilateral indicator for 29848 is 1, meaning Medicare pays 150% of the single-code fee schedule amount (or the lower of total actual charges). Some payers — including certain BCBS and Medicare Advantage plans — maintain policies limiting one release per day, so verify before billing bilateral.

The code is used primarily by hand surgeons, orthopedic surgeons, and plastic/reconstructive surgeons. Payer policies on office-based billing for 29848 vary; some commercial payers deny the code when billed with place of service 11, so confirm site-of-service coverage before scheduling in-office cases.

RVU & reimbursement

Component RVUs and Medicare national rate. Actual payment varies by GPCI locality.

Source · CMS Physician Fee Schedule, RVU26A · January 2026

Work RVU6.23
Practice expense RVU7.1
Malpractice RVU1.21
Total RVU14.54
Medicare national rate$485.65
Global period90 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

SettingMedicare rate (national)
Office (PFS non-facility)
Procedure performed in physician's office
$485.65
HOPD (APC 5112)
Hospital outpatient department
$1,642.82
ASC (PI A2)
Ambulatory surgical center (freestanding)
$872.87

Common denial reasons

The recurring reasons claims for CPT 29848 get rejected.

Source · Editorial brief grounded in CMS NCCI edits, AAOS coding appeals, and cited references ↓

  • Missing or inadequate nerve conduction study — payers routinely require objective electrodiagnostic evidence of median nerve compression before approving surgical release
  • Insufficient documentation of conservative treatment failure — many payers require a defined trial period before authorizing endoscopic release
  • Site-of-service mismatch — some payers deny 29848 billed with place of service 11 (office), treating it as ASC-only or hospital-only
  • Bilateral procedure denied due to MUE of 1 per day — bilateral cases must be billed as modifier 50 on a single line, not as two separate units or two separate lines without proper modifiers
  • Same-day E/M billed without modifier 25 — NCCI bundles the E/M into the surgical package unless a separately identifiable service is documented and modifier 25 is appended
  • Global period violation — postoperative visits billed within 90 days without modifier 24 (unrelated) or 79 (unrelated procedure) are automatically bundled

Frequently asked questions

Source · Generated from the editorial pipeline, verified against 6 cited references ↓

01Can 29848 be billed bilaterally on the same day?
Yes, but bill it on a single line with modifier 50, not as two separate lines or two units. Medicare's bilateral indicator for 29848 is 1, so payment is 150% of the single-code fee schedule amount (or lower of total actual charges). Some payers — certain BCBS and Medicare Advantage plans — have policies limiting one release per session; verify before billing and be prepared to appeal with operative documentation.
02What ICD-10 diagnosis codes are typically accepted with 29848?
G54.2 (Cervical root disorders, NEC) is incorrect for carpal tunnel — use G56.00–G56.02 for carpal tunnel syndrome by laterality. Payers will deny or flag 29848 paired with non-median-nerve compression diagnoses, so match laterality between the ICD-10 code and the RT/LT modifier.
03Is modifier 25 required if the surgeon performs an E/M on the day of surgery?
Yes. NCCI bundles same-day E/M services into the surgical package. Append modifier 25 to the E/M and document a separately identifiable, medically necessary service beyond the pre-procedure assessment. Without modifier 25, the E/M will be denied.
04Does 29848 have a 90-day global period, and what does that include?
29848 carries a 90-day global period. That covers the surgery itself, the day-before pre-op visit, and all routine postoperative care through day 90. Separate billing for wound checks, suture removal, or routine follow-up in that window will deny. Use modifier 24 for unrelated E/M visits and modifier 79 for unrelated procedures performed during the global.
05Will Medicare pay for 29848 performed in an office setting?
Medicare does not have a blanket prohibition on office-based 29848, but facility requirements for endoscopic procedures make true in-office billing uncommon. Some commercial payers do deny the code with place of service 11. Confirm your specific payer's site-of-service policy before scheduling in-office cases, and document that the necessary equipment and safety standards were met.
06What documentation is required to support medical necessity for endoscopic over open carpal tunnel release?
Most payers do not require justification for choosing endoscopic over open release, but the record must establish CTS diagnosis with objective electrodiagnostic evidence (nerve conduction study or EMG) and a documented trial of conservative care. Some payers have specific clinical criteria — check the applicable LCD or commercial policy before the procedure.
07Can 29848 and an open carpal tunnel release (64721) be billed together?
No. 29848 (endoscopic release) and 64721 (open neuroplasty/carpal tunnel release) describe the same anatomical objective via different approaches. Billing both for the same wrist on the same day is a mutually exclusive edit. Use the code that matches the documented approach.

Sources & references

Editorial content was developed using the following public sources. Last verified May 8, 2026.

  1. 01CMS Physician Fee Schedule 2026
  2. 02
    cms.gov
    https://www.cms.gov/files/document/2025nccimedicarepolicymanualcompletepdf.pdf
  3. 03
    aapc.com
    https://www.aapc.com/codes/cpt-codes/29848
  4. 04
    aapc.com
    https://www.aapc.com/discuss/threads/29848-50.199703/
  5. 05
    payerprice.com
    https://payerprice.com/rates/29848-CPT-fee-schedule
  6. 06
    eatonhand.com
    http://www.eatonhand.com/coding/n29848.htm

Mira AI Scribe

Mira's AI scribe captures the endoscopic approach, confirmation of complete transverse carpal ligament release, laterality, anesthesia type, and neurovascular status at closure directly from surgeon dictation. It also flags when conservative treatment history and electrodiagnostic findings are absent from the note — the two documentation gaps most likely to trigger prior auth denials and post-payment audits for 29848.

See how Mira captures CPT 29848 documentation

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