Surgical removal of a subfascial soft tissue tumor of the face or scalp measuring less than 2 cm, involving dissection below the fascia layer (e.g., subgaleal or intramuscular planes).

Verified May 8, 2026 · 6 sources ↓

Medicare: $565.48
Work RVU: 5.28
Global, days: 90
Region: Other

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Documentation requirements

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

Source · Editorial brief grounded in 6 cited references ↓

Operative note must explicitly state the plane of dissection as subfascial (e.g., subgaleal, intramuscular) — not just 'deep' or 'excised.'
Tumor size confirmed as less than 2 cm, measured at the time of excision and recorded in the operative note.
Anatomic location specified — identify the precise facial or scalp region involved.
Pathology report or documentation that specimen was submitted for histologic analysis.
Pre-operative diagnosis and clinical indication establishing medical necessity (e.g., symptomatic mass, concern for malignancy, rapid growth).
Documentation of any imaging used to characterize depth or extent of the tumor pre-operatively.

Applicable modifiers

Modifiers commonly billed with this code.

Source · AMA CPT modifier descriptors · CMS NCCI Policy Manual

22 Increased complexity 51 Multiple procedures 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 21013 covers excision of a soft tissue tumor located in the subfascial layer of the face or scalp — meaning the tumor lies beneath the fascia, such as in the subgaleal or intramuscular plane — and measures less than 2 cm. This distinguishes it from the subcutaneous series (21011–21012): depth of dissection is the defining variable, not just tumor size. The subfascial approach requires greater dissection, carries higher operative complexity, and is reflected in the code's higher RVU relative to its subcutaneous counterparts.

The 90-day global period applies. That window covers the pre-op visit the day before surgery, the procedure itself, and all routine post-op care through day 90. Unrelated E/M visits within that window require modifier 24; unrelated procedures require modifier 79. Pathology submission is standard practice — document specimen orientation and submit for analysis to complete the clinical picture and support medical necessity.

Selection between 21013 (subfascial, <2 cm), 21014 (subfascial, ≥2 cm), 21011 (subcutaneous, <2 cm), and 21012 (subcutaneous, ≥2 cm) hinges entirely on operative documentation. The note must state the anatomic depth reached and confirm the tumor was subfascial. If the operative report only describes 'excision of facial mass' without specifying the plane of dissection, expect a coding audit flag or downcode to 21011.

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 (5.28) is the surgeon's own effort — the figure physician pay and productivity targets are built on. The total RVU (16.93) adds practice overhead and malpractice, and is what drives the Medicare payment below.

Work RVU	5.28
Practice expense RVU	10.67
Malpractice RVU	0.98
Total RVU	16.93
Medicare national rate	$565.48
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	$565.48
HOPD (APC 5072) Hospital outpatient department	$1,687.37
ASC (PI P3) Ambulatory surgical center (freestanding)	$358.17

Common denial reasons

The recurring reasons claims for CPT 21013 get rejected.

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

Operative note fails to document subfascial depth — payer downcodes to 21011 (subcutaneous) without explicit plane confirmation.
Tumor size not documented in the operative note, preventing verification that the <2 cm threshold for 21013 was met rather than 21014.
Medical necessity not established — absence of clinical history explaining why excision was indicated (e.g., no documentation of symptoms, growth pattern, or diagnostic concern).
Incorrect code selection when tumor is actually subcutaneous — 21013 requires dissection below the fascia, not just a 'deep' excision.
Bundling denial when wound repair or closure is billed separately on the same claim without a modifier supporting a distinct service.

Frequently asked questions

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

01What separates 21013 from 21011?

Depth of dissection. 21011 is subcutaneous; 21013 requires the tumor to be subfascial — below the fascia layer, such as in the subgaleal or intramuscular plane. Size threshold (less than 2 cm) is the same for both.

02When should I use 21014 instead of 21013?

Use 21014 when the subfascial tumor measures 2 cm or greater at excision. The 2 cm cutoff is based on the tumor's actual excised size, not pre-op imaging estimates.

03Can 21013 be billed with an E/M on the same day?

Yes, if the E/M is a separately identifiable service unrelated to the decision to operate. Append modifier 25 to the E/M. If the visit was the decision-making visit for a major procedure, modifier 57 applies instead.

04Does the 90-day global cover the pathology read?

No. Pathology (e.g., 88305) is billed separately by the pathologist and is not bundled into the surgical global period. The surgeon's global covers surgical and routine post-op management only.

05Is modifier 50 appropriate for bilateral facial tumors?

Yes, if distinct tumors are excised on both sides of the face at the same session, modifier 50 indicates a bilateral procedure. Document each lesion's location, depth, and size separately in the operative note.

06How does site of service affect reimbursement for 21013?

There is a significant payment differential between HOPD and ASC settings. See the Site of Service comparison table on this page for current 2026 figures under the CMS Physician Fee Schedule.

07If I use modifier 22 for increased complexity, what documentation is required?

The operative note must detail why the procedure exceeded typical work — for example, extensive adhesions, proximity to facial nerve branches, distorted anatomy from prior surgery, or unusually prolonged operative time. A cover letter summarizing the added complexity strengthens the claim.

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 plane of dissection (subfascial, subgaleal, or intramuscular), confirmed tumor dimensions at excision, anatomic location on the face or scalp, and whether the specimen was sent to pathology. That documentation locks the code selection at 21013 versus 21011 and prevents auditors from downgrading to the subcutaneous series on the basis of an incomplete operative note.

See how Mira captures CPT 21013 documentation