CPT code 64642: Chemodenervation, one extremity, 1–4 muscles2026 Medicare rate & RVUs in Washington, DC area

In Washington, DC area, Medicare pays $184.89 for 64642 in the office and $105.80 when it’s performed in a hospital or facility.

Check a contract rate as a % of Medicare · 64642 nationwide

Medicare allowed amount for participating (non-QP) physicians, before deductible, coinsurance and claim adjustments. Not a patient’s bill or a hospital charge.

What 64642 covers

A clinician injects a chemodenervating agent, commonly botulinum toxin, into one to four muscles in a single arm or leg. Neurologists and physical medicine and rehabilitation physicians commonly perform this treatment for focal spasticity, such as after stroke or in cerebral palsy, and for focal dystonia. Services may occur in an office or outpatient hospital. The code represents the treated extremity and muscle-count range, not the number of injection sites or the amount of drug administered.

Document the treated extremity, each muscle injected, and the condition being treated. For another extremity in the same one-to-four-muscle range, report the additional-extremity code 64643 rather than modifier 50. Medicare assigns a 0-day global period, so same-day preoperative and postoperative care is included. When multiple procedures occur in one session, the highest-valued procedure is paid in full and other procedures are subject to the standard 50% multiple-procedure reduction. Medicare does not pay an assistant at surgery for this service; co-surgeon and team-surgery reporting are not permitted.

This summary was written with AI assistance from CMS physician fee schedule data and checked against the CMS billing rules shown here. Rates on this page come directly from CMS files.

How Washington, DC area compares for 64642

Across 109 of 109 payment localities, the office rate for 64642 runs from $143.40 in Arkansas to $205.87 in San Benito County, CA. Washington, DC area pays $184.89. The RVUs are the same everywhere; the geographic indexes change the dollars.

Every other payment area

64642 rates by state

Office rate range in each state. Select a state to see its payment localities.

See 64642 in every payment locality

How the 64642 rate is calculated

Each of 64642’s three RVUs is multiplied by a geographic index (GPCI) for the payment locality, added up, and multiplied by the conversion factor. Drag the indexes or enter a ZIP to see what moves the rate.

Payment rules and modifiers for 64642

The CMS indicators that decide how 64642 is paid alongside other services.

What modifiers do to the payment

When to use modifier 51

Codes related to 64642

Related codes aren’t interchangeable: bill the code that matches the service performed.

How 64642 has changed in Washington, DC area

Price 64642 for an earlier date of service

Where the Washington, DC area rate applies

Washington, DC area is a Medicare payment area, not a city. Our Census mapping connects it to 1 cities and communities in District of Columbia. Some span more than one payment area; confirm with the service ZIP.

• Washington

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Where these rates come from

FeeBase calculates base physician payments from CMS work, practice-expense and malpractice RVUs, adjusted by each locality’s geographic indexes and the conversion factor. Services without a published rate are labeled, never given a made-up amount. Amounts are Medicare allowed amounts before claim adjustments: not a patient’s bill or a commercial rate.

CMS RVU26D · effective Oct 1, 2026 through the day before Jan 1, 2027

Open CMS sourceHow we calculate rates