Surgical removal of a subfascial (intramuscular) soft tissue tumor of the neck or anterior thorax measuring 5 cm or greater.

Verified May 8, 2026 · 7 sources ↓

Medicare: $680.71
Work RVU: 10.85
Global, days: 90
Region: Other

Drawn from CMSGomedicalbillingAAPCFindacodeBedrockbilling

Documentation requirements

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

Source · Editorial brief grounded in 7 cited references ↓

Tumor depth confirmed as subfascial (beneath fascia/intramuscular) in the operative report
Tumor size documented as 5 cm or greater — measured specimen size, not imaging estimate alone
Anatomic location specified as neck or anterior thorax
Pre-operative imaging or pathology supporting medical necessity
Operative note identifies surgical approach and any distinct anatomic structures when billing additional codes same-day
Post-operative pathology report correlating with pre-operative diagnosis

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 51 Multiple procedures 58 Staged or related 59 Distinct service 78 Unplanned return — related 79 Unrelated during global 80 Assistant surgeon LT Left side RT Right side XS Separate structure

What this code covers

Source · Editorial summary grounded in 7 cited references ↓

CPT 21554 covers excision of a deep soft tissue tumor — beneath the fascia, typically intramuscular — in the neck or anterior thorax when the lesion measures 5 cm or more. Depth below fascia is the defining anatomic threshold that separates this code from its subcutaneous counterparts (21552, 21555). Size and depth must both be confirmed in the operative note to support the code selection.

This carries a 90-day global period. All related post-op E/M visits through day 90 are bundled. Use modifier 24 for unrelated E/M visits in that window, modifier 78 for a related unplanned return to the OR, and modifier 79 for an unrelated procedure during the global. NCCI edits apply to more than 10 code pairs; CO-97 denials are recoverable when the op note documents distinct anatomic sites or separate surgical steps — XS is preferred over modifier 59 for distinct structures.

The procedure appears most frequently billed by Dermatology in Medicare data, though the subfascial depth and size threshold make it a natural fit for orthopedic surgery, surgical oncology, and ENT as well. Site of service matters: HOPD and ASC payments differ substantially (see the Site of Service comparison table). Confirm the tumor's histologic diagnosis and imaging findings are documented pre-operatively to support medical necessity.

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 (10.85) is the surgeon's own effort — the figure physician pay and productivity targets are built on. The total RVU (20.38) adds practice overhead and malpractice, and is what drives the Medicare payment below.

Work RVU	10.85
Practice expense RVU	7.14
Malpractice RVU	2.39
Total RVU	20.38
Medicare national rate	$680.71
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	$680.71
HOPD (APC 5073) Hospital outpatient department	$2,967.63
ASC (PI G2) Ambulatory surgical center (freestanding)	$1,248.36

Common denial reasons

The recurring reasons claims for CPT 21554 get rejected.

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

Missing depth documentation — subcutaneous tumors bill to 21552 or 21555, not 21554
Tumor size not explicitly stated in operative or pathology report, triggering medical necessity denial
NCCI bundling (CO-97) when same-day codes billed without modifier 59 or XS and documentation of distinct site
Post-op E/M billed without modifier 24 inside the 90-day global period
ICD-10 diagnosis code mismatch — malignant vs. benign vs. uncertain behavior must align with operative and path findings

Frequently asked questions

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

01What separates 21554 from 21552?

Depth is the key split. 21554 is subfascial (intramuscular), 5 cm or greater. 21552 is subcutaneous, 3 cm or greater. If your op note doesn't state the tumor was beneath the fascia, expect a downcoded denial to 21552 or 21555.

02Does the 5 cm threshold apply to the excised specimen or the pre-op imaging measurement?

Document both, but the pathology specimen measurement is the most defensible. If imaging shows 4.8 cm and the specimen measures 5.2 cm, code to 21554 and include both measurements in the record.

03Can 21554 be billed bilaterally?

Yes, with modifier 50 if tumors are excised from bilateral anatomic sites in the same operative session. Document each lesion's size, depth, and location separately in the operative note.

04How should unplanned return trips to the OR during the global be handled?

Use modifier 78 for a related complication requiring a return to the OR within the 90-day global. Modifier 79 applies only when the return procedure is entirely unrelated to the original excision. Do not invert these.

05Which NCCI pairs most often trigger CO-97 denials with 21554?

Codes like 0213T and 0216T carry modifier indicator 0 — those edits cannot be bypassed regardless of documentation. Indicator-1 pairs can be separated with modifier XS when the op note documents a distinct anatomic structure. Use XS over modifier 59 whenever site distinction is the basis for unbundling.

06Is modifier 22 appropriate when the tumor involves significant neurovascular dissection?

Yes, when operative complexity substantially exceeds the typical procedure — for example, tumor adherence to major cervical vessels or nerve roots requiring prolonged dissection. Document time, complexity, and specific anatomical challenges. Expect payer review; attach the operative note proactively.

Sources & references

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

Mira Scribe

Mira's AI scribe captures tumor depth (subfascial/intramuscular), measured size, and exact anatomic location from dictation at the time of the procedure. It also flags when post-op E/M notes fall inside the 90-day global and prompts for modifier 24 if the visit is unrelated — preventing the most common audit finding for this code.

See how Mira captures CPT 21554 documentation