CPT 21720Surgery

Revision of neck muscle

CPT code 21720 covers surgical revision of neck muscles, typically performed to correct muscle function, address scar tissue, or treat complications from prior neck surgery or trauma.

Showing rates for

National Average

Base Medicare rate

$533.72

This calculator gives a typical-case estimate using standard Medicare modifier rules. Actual payment depends on payer policies, documentation, code-specific CMS status indicators, and locality. Verify before billing.

RVU breakdown

Work RVU

5.8

PE RVU (NF)

8.31

MP RVU

2.39

Total RVU

16.5

Conversion factor: 32.3465 · Source: CMS MPFS RVU25A · Confidence: High

NCCI bundling edits

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Billing tips

Document the specific reason for revision and clearly reference the prior procedure date and CPT code
Impact: Reduces denial rate by approximately 35-40%; establishes medical necessity and differentiates from primary repair
Include detailed operative note describing scar tissue lysis, extent of dissection, and specific muscles revised
Impact: Critical for modifier 22 approval which can increase reimbursement by $107-$214 for complex cases
Bill in facility setting when performed in hospital or ASC as both rates are identical at $533.72
Impact: No rate difference between settings; choose based on medical necessity and facility availability rather than reimbursement
Verify global period status if performed within 90 days of related neck surgery and apply modifier 78 or 79 appropriately
Impact: Prevents automatic denial; modifier 78 pays at reduced rate while 79 pays full $533.72 if truly unrelated
Separately bill for imaging guidance or nerve monitoring if performed and documented, using appropriate add-on codes
Impact: Can add $150-$400 to total reimbursement when medically necessary services are properly documented
Appeal denials with comparison photographs, range of motion measurements, and functional assessment documentation
Impact: Increases successful appeal rate to 60-70% when objective evidence of medical necessity is provided

Common denials

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Frequently asked questions

What is the Medicare reimbursement rate for CPT 21720 in 2025?

The 2025 Medicare national average reimbursement for CPT 21720 is $533.72 for both facility and non-facility settings. This rate is based on 16.5 total RVUs multiplied by the 2025 conversion factor of 32.3465.

How many RVUs is CPT code 21720 worth?

CPT 21720 has 16.5 total RVUs, consisting of 5.8 work RVUs, 8.31 practice expense RVUs (both facility and non-facility), and 2.39 malpractice RVUs according to the 2025 Medicare Physician Fee Schedule.

What is the difference between CPT 21720 and primary neck muscle repair codes?

CPT 21720 specifically describes revision surgery on neck muscles previously operated upon, whereas primary repair codes describe initial surgical intervention. Documentation must clearly establish this is revisional work addressing complications, scar tissue, or failure of prior surgery rather than a first-time repair.

Can CPT 21720 be billed bilaterally with modifier 50?

Yes, modifier 50 can be applied when bilateral neck muscle revision is performed during the same operative session. Medicare typically reimburses bilateral procedures at 150% of the base rate, which would be approximately $800.58, though payer policies vary.

What documentation is required to bill CPT 21720 successfully?

Required documentation includes clear identification of the procedure as revision surgery, reference to the prior operation date and type, specific muscles revised, extent of scar tissue lysis, medical necessity justification, detailed intraoperative findings, and evidence of functional impairment requiring surgical correction.

Is CPT 21720 subject to the global surgical package?

Yes, CPT 21720 carries a 90-day global period. Any related procedures performed within 90 days require modifier 78 (related return to OR) or 79 (unrelated procedure during global period) to receive separate payment, along with documentation justifying the additional surgery.

What are common reasons for denial of CPT 21720 claims?

Common denials include lack of medical necessity documentation, insufficient evidence that procedure is truly revisional versus primary, bundling with related procedures without appropriate modifiers, inadequate operative reports failing to describe complexity, and claims submitted during global period of related surgery without proper modifiers.