Arthrotomy with tissue biopsy of a toe interphalangeal joint, performed to sample the synovial lining for diagnostic evaluation.

Verified May 8, 2026 · 7 sources ↓

Medicare: $357.72
Work RVU: 3.48
Global, days: 90
Region: Foot & ankle

Drawn from CMSAAPCMdclarityFastrvu

Documentation requirements

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

Source · Editorial brief grounded in 7 cited references ↓

Specify the exact toe and joint level (e.g., right second toe proximal interphalangeal joint) — laterality and level determine modifier assignment and support medical necessity.
Document the clinical indication: prior imaging findings, failed conservative management, or suspicion for inflammatory, infectious, or neoplastic synovial pathology.
Operative note must describe the arthrotomy approach by name, visualization of the joint space, and the technique used to excise synovial tissue.
Confirm the specimen was submitted to surgical pathology — document specimen label and pathology requisition in the operative record.
If additional procedures were performed in the same session, document anatomically distinct sites or separate clinical necessity to support unbundling with modifier 59 or XS.
Post-op note or same-day E/M must not duplicate bundled global services unless a clearly unrelated condition is addressed and modifier 24 or 25 is applied.

Applicable modifiers

Modifiers commonly billed with this code.

Source · AMA CPT modifier descriptors · CMS NCCI Policy Manual

22 Increased complexity 24 Unrelated E/M during global 25 Significant separate E/M 50 Bilateral procedure 51 Multiple procedures 52 Reduced services 59 Distinct service 78 Unplanned return — related 79 Unrelated during global LT Left side RT Right side XS Separate structure

What this code covers

Source · Editorial summary grounded in 7 cited references ↓

CPT 28054 describes an open arthrotomy of a toe interphalangeal joint in which a sample of the joint lining (synovium) is excised and submitted for pathological examination. The surgeon enters the joint space, harvests the synovial tissue specimen, and closes the wound. The procedure is diagnostic in intent — the biopsy drives workup for inflammatory arthropathy, crystal deposition disease, infection, or synovial neoplasm when less invasive studies are inconclusive.

The code carries a 90-day global period. All routine post-op visits, wound care, and suture removal through day 90 are bundled. If you're managing an unrelated problem during that window, append modifier 24 to the E/M. If a separate, unrelated surgical procedure is needed during the global, append modifier 79. An unplanned return to the OR for a complication related to the original biopsy uses modifier 78.

Site laterality matters for this code. Append LT or RT to specify the operative foot. If the same procedure is performed bilaterally on the same date, report with modifier 50. When 28054 is performed alongside other foot procedures in the same operative session, modifier 51 applies to the lower-valued service. If a concurrent open tenotomy (e.g., 28234) is separately documented and clinically distinct, modifier 59 or XS may be required to unbundle, consistent with NCCI guidance.

RVU & reimbursement

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

Source · CMS Physician Fee Schedule, RVU26A · January 2026

Work RVU vs. total RVU

The work RVU (3.48) is the surgeon's own effort — the figure physician pay and productivity targets are built on. The total RVU (10.71) adds practice overhead and malpractice, and is what drives the Medicare payment below.

Work RVU	3.48
Practice expense RVU	6.94
Malpractice RVU	0.29
Total RVU	10.71
Medicare national rate	$357.72
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	$357.72
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 28054 get rejected.

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

Missing laterality modifier (LT/RT) — many payers require site-specific modifiers on foot procedure codes and will return the claim.
Medical necessity not established — claims lacking documented failed conservative care or prior imaging supporting synovial pathology are frequently denied.
Unbundled companion procedure denied — if 28234 or another foot procedure is billed same-day without modifier 59 or XS and adequate documentation, NCCI edits trigger a denial.
Diagnosis-procedure mismatch — billing 28054 with a non-specific or musculoskeletal pain ICD-10 code rather than a code reflecting suspected synovial disease draws payer scrutiny.
Global period conflict — post-op services billed without modifier 24 or 79 during the 90-day global are automatically denied as bundled.

Frequently asked questions

Source · Generated from the editorial pipeline, verified against 7 cited references ↓

01Does 28054 cover biopsy of a metatarsophalangeal (MTP) joint?

No. CPT 28054 is specific to interphalangeal joints of the toes. An arthrotomy with biopsy of an MTP joint is reported with 28052. Using 28054 for an MTP procedure is an incorrect code assignment and a common audit finding.

02Can I bill 28054 and 28234 together on the same operative report?

Only if the tenotomy is clinically distinct and separately documented. CPT 28234 is a component of 28054 in NCCI edits. To unbundle, you need documentation of a separate tendon release that is not incidental to the arthrotomy access, and modifier 59 or XS must be appended to 28234.

03What ICD-10 codes typically pair with 28054?

Common pairings include codes for inflammatory arthropathies (e.g., M06.x series for rheumatoid arthritis), crystal arthropathy (M10.x, M11.x), infectious arthritis (M00.x), and synovial disorders (M67.x). Avoid non-specific pain codes — they trigger medical necessity denials.

04Is modifier 50 appropriate if biopsies are taken from the same joint level on both feet?

Yes. If 28054 is performed on the same joint level bilaterally at the same operative session, report with modifier 50 and one line of service. Confirm your payer's billing convention — some require two lines with LT and RT instead.

05How does the 90-day global period affect rheumatology or infectious disease follow-up?

Post-op visits for wound checks and routine surgical follow-up are bundled. If a rheumatologist or other specialist sees the patient during the global for the underlying systemic disease — not the surgical wound — that E/M is billed separately with modifier 24 and must be clearly documented as unrelated to the surgical recovery.

06What if the biopsy requires significantly more work than typical due to severe synovial proliferation or adhesions?

Modifier 22 applies when the procedure requires substantially greater work than usual. You must attach a supporting letter explaining the additional time and complexity. Without that documentation, payers will strip the modifier and reprocess at the base rate.

Sources & references

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

Mira Scribe

Mira's AI scribe captures the joint level and laterality from dictation (e.g., 'right second toe PIP joint'), the surgical approach to the joint space, the description of the synovial tissue excised, and the clinical indication driving the biopsy. That specificity prevents the two most common denials for this code: missing laterality modifiers and vague medical necessity documentation that fails payer review.

See how Mira captures CPT 28054 documentation