Billing code 95923: Sweat function testMedicare rate & RVUs

Medicare pays $122.58 for 95923 nationally in the office. Local office rates run $108.87–$165.49.

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

What 95923 covers

Code 95923 represents testing of sweat-gland responses as an indicator of autonomic nerve function. The service may use QSART, a silastic sweat imprint, thermoregulatory sweat testing, or more than one of these approaches, with interpretation and a report. Neurologists and other clinicians who evaluate autonomic disorders commonly order it for problems such as suspected autonomic or small-fiber neuropathy, abnormal sweating, or related sensory and autonomic symptoms. Testing is generally performed in an autonomic or neurodiagnostic laboratory.

Choose 95923 when the function being evaluated is sudomotor, rather than parasympathetic or adrenergic function. Documentation should identify the clinical reason for testing, the method or methods performed, relevant results, and the interpretation. The service includes the interpretation and report. CMS recognizes a professional component billed with modifier 26 for interpretation and a technical component billed with modifier TC for equipment and staff; billing without either modifier represents the global service.

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.

Where 95923 pays more and less

The same RVUs, adjusted for each area’s costs. Open a locality for its calculation, history and nearby areas.

109 of 109 payment localities

95923 rates by state

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

How the 95923 rate is calculated

Each of 95923’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 95923

The CMS indicators that decide how 95923 is paid alongside other services.

What modifiers do to the payment

When to use modifier 26

95923 compared with similar codes

How to choose

95921Autonomic testing

Choose 95921 for testing parasympathetic innervation; 95923 evaluates sudomotor function through sweat responses.

95922Autonomic testing

Choose 95922 for adrenergic innervation testing; 95923 evaluates the autonomic pathways involved in sweating.

95924Autonomic testing

95924 covers combined parasympathetic and sympathetic testing with tilt. Use 95923 for sudomotor testing, such as QSART or thermoregulatory sweat testing.

Codes related to 95923

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

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