Arthroscopy · Knee

Knee arthroscopy with surgical removal of the medial or lateral meniscus, including any associated cartilage shaving or debridement performed in the same or a separate compartment.

Verified May 8, 2026 · 8 sources ↓

Medicare: $515.71
Total RVUs: 15.44
Global, days: 90
Region: Knee

Drawn from CMSAAPCKzanowAthelasMedibillmd

Documentation requirements

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

Source · Editorial brief grounded in 8 cited references ↓

Specify medial OR lateral compartment explicitly — 'meniscectomy performed' without laterality is insufficient for code selection between 29881 and 29880.
Name the arthroscope lens used (e.g., 30-degree or 70-degree) and all instruments: shavers, graspers, biters, probes, and any radiofrequency devices.
If chondroplasty is performed, document which compartment(s) received cartilage work — required to support G0289 add-on if a loose body is removed from a different compartment.
Document medical necessity with supporting ICD-10 diagnosis (e.g., M23.305 for meniscal tear) linked directly to the operative compartment.
Record anesthesia type (general or regional) and operative time; typical range is 30–45 minutes — significant deviation warrants modifier 22 with supporting explanation.
If synovectomy (29876) is billed with modifier 59, the operative note must describe distinct compartment location and independent medical necessity separate from the meniscectomy.

Applicable modifiers

Modifiers commonly billed with this code.

Source · AMA CPT modifier descriptors · CMS NCCI Policy Manual

22 Increased complexity 50 Bilateral procedure 51 Multiple procedures 59 Distinct service LT Left side RT Right side 78 Unplanned return — related 79 Unrelated during global

Related ICD-10 diagnoses

Diagnoses commonly reported with CPT 29881.

Source · CMS LCDs · AAOS specialty guidance · claims-pattern analysis

M23.211 M23.212 M23.221 M23.222 S83.211A

What this code covers

Source · Editorial summary grounded in 8 cited references ↓

29881 covers a unilateral knee arthroscopy in which the surgeon removes all or part of either the medial or lateral meniscus. Chondroplasty — debridement or shaving of articular cartilage — is included in the code description regardless of which compartment the cartilage work occurs in; you cannot bill 29877 separately for chondroplasty performed during a 29881 case. The 90-day global period covers the day-before visit, the procedure, and all routine post-op care through day 90.

If both the medial and lateral menisci are removed in the same knee during the same session, bill 29880 — not two units of 29881. The only scenario where G0289 stacks onto 29881 is removal of a loose body or foreign body from a different compartment than the meniscectomy; G0289 cannot be used for chondroplasty in that same additional compartment because 29881 already includes it. Synovectomy code 29875 is a 'separate procedure' under NCCI and cannot be reported with 29881 for the same knee; 29876 (major synovectomy) requires modifier 59 and documented medical necessity in a distinct compartment.

Laterality modifiers LT and RT are mandatory — Medicare auto-denies 29881 without them. If a medial meniscectomy (29881) and a meniscal repair in the lateral compartment (29882) are performed in the same session, append modifier 59 to the secondary code; NCCI recognizes knee compartments as distinct anatomic structures, and the edit between 29881 and 29882 is bypassable with 59 when documentation supports separate-compartment work.

RVU & reimbursement

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

Source · CMS Physician Fee Schedule, RVU26A · January 2026

Work RVU	6.85
Practice expense RVU	7.19
Malpractice RVU	1.4
Total RVU	15.44
Medicare national rate	$515.71
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	$515.71
HOPD (APC 5113) Hospital outpatient department	$3,342.87
ASC (PI A2) Ambulatory surgical center (freestanding)	$1,644.87

Common denial reasons

The recurring reasons claims for CPT 29881 get rejected.

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

Missing LT or RT modifier — Medicare and most commercial payers auto-reject 29881 without a laterality indicator.
Billing 29881 twice for bilateral compartments of the same knee instead of upgrading to 29880.
Separately billing 29877 for chondroplasty performed during the same session — it is bundled into 29881 by code description and NCCI.
Reporting 29875 (limited synovectomy) alongside 29881 on the ipsilateral knee — NCCI prohibits this combination regardless of modifier.
Using G0289 for cartilage shaving in the same compartment as the meniscectomy — G0289 is only payable with 29881 when it captures loose/foreign body removal from a different compartment.
Diagnosis-code mismatch: billing 29881 with an osteoarthritis-only diagnosis triggers medical necessity review; a documented meniscal tear ICD-10 code is required.

Frequently asked questions

Source · Generated from the editorial pipeline, verified against 8 cited references ↓

01When do I bill 29880 instead of 29881?

Bill 29880 when both the medial and lateral menisci are removed in the same knee during the same session. 29881 is for one compartment only — medial OR lateral. Never report 29881 twice for the same knee.

02Can I separately bill chondroplasty (29877) performed during a 29881 case?

No. 29877 is bundled into 29881 by both the code description and NCCI edits. Chondroplasty in any compartment is included in 29881 payment regardless of where the cartilage work occurs.

03When is G0289 billable alongside 29881?

Only when a loose body or foreign body is removed from a compartment different from the one where the meniscectomy was performed. G0289 cannot be used for chondroplasty in that additional compartment — 29881 already covers it.

04Can I bill a meniscal repair (29882) and a meniscectomy (29881) on the same knee the same day?

Yes. NCCI places an edit between 29881 and 29882, but it is bypassable. Append modifier 59 to indicate the procedures were performed in separate compartments. Document each compartment's work clearly in the operative note.

05Is modifier 50 ever appropriate for 29881?

Only if both knees are operated on during the same session. Use 29881-50 for bilateral same-day meniscectomies, or report 29881-LT and 29881-RT on separate lines per payer preference. Confirm bilateral billing policy with each payer before submitting.

06What global period applies, and what does it cover?

29881 carries a 90-day global period. It includes the day-before pre-op visit, the procedure, and all routine post-op care through day 90. Bill unrelated E&M visits in the global window with modifier 24; a pre-op decision visit on a separate date requires modifier 57.

07Does Medicare cover 29881 for osteoarthritis without a meniscal tear diagnosis?

CMS has a medical policy article (A52369) addressing arthroscopic procedures for the osteoarthritic knee. An osteoarthritis diagnosis alone is high-risk for medical necessity denial. The claim should be supported by a documented meniscal tear or other covered indication, not degenerative joint disease as the sole diagnosis.

Sources & references

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

Mira AI Scribe

Mira's AI scribe captures the operative compartment (medial vs. lateral), all instruments used, cartilage work by compartment, and any additional procedures with their anatomic locations — directly from surgeon dictation. That specificity prevents the two most common 29881 denials: missing laterality and incorrectly bundled chondroplasty.

See how Mira captures CPT 29881 documentation