CPT 81003: Urinalysis, Automated, Without Microscopy
CPT 81003 reports an automated dipstick urinalysis without microscopy, where a machine reads the reagent strip for analytes such as glucose, protein, pH, and leukocytes. It is a clinical laboratory service priced under the Medicare Clinical Laboratory Fee Schedule (CLFS), not the Physician Fee Schedule, so it carries no PFS dollar amount.
- Code type
- Clinical laboratory test (urinalysis)
- Priced under
- Medicare Clinical Laboratory Fee Schedule (CLFS), not the PFS
- Components
- Automated dipstick reading, no microscopy
- Frequency notes
- Diagnosis-driven; QW modifier applies in CLIA-waived settings
What is CPT 81003 used for?
CPT 81003 reports an automated dipstick urinalysis without microscopy. A reagent strip is dipped in a urine specimen and read by an instrument that automatically records chemical analytes and constituents — typically glucose, protein, pH, specific gravity, ketones, blood, and leukocytes. It is a common screening test for urinary tract infection, kidney disease, and diabetes.
The defining feature is that the strip is machine-read and no microscopic examination is performed. If a microscopic component is added, a different urinalysis code applies.
How much does Medicare pay for 81003?
On the Physician Fee Schedule, 81003 shows status indicator X — statutory exclusion, so no RVUs and no PFS dollar. That is correct: lab tests are not paid on the PFS.
Payment comes from the Medicare Clinical Laboratory Fee Schedule (CLFS), priced with national limitation amounts and gapfill/crosswalk methodology. The Medicare fee calculator PFS lookup returns nothing — use the current CLFS rate from your MAC or payer fee file.
How does 81003 differ from 81002?
Both codes report a dipstick urinalysis without microscopy. The distinction is purely the reading method:
| Code | Method | QW modifier |
|---|---|---|
| 81002 | Manual (visual color comparison) | Not used (inherently waived) |
| 81003 | Automated instrument reading | Required in CLIA-waived settings |
Example: a clinic runs the strip through a benchtop analyzer that prints the results — that is 81003, appended with QW if the site holds a CLIA Certificate of Waiver.
How is 81003 billed correctly?
- Confirm the strip was machine-read (81003), not manually read (81002).
- Append QW in CLIA-waived settings; verify your certificate level first.
- Do not report 81003 with 81002 for the same specimen — they are alternate methods, not additive.
Coverage follows payer medical-necessity policy, so link the order to a supporting diagnosis and issue an ABN when the indication may not be covered. Watch NCCI edits when urinalysis is billed alongside a reflex culture. Related lab codes include 85025 and 80048.
Frequently asked questions
Because 81003 is a clinical laboratory test, not a physician service. On the PFS it carries status indicator X (statutory exclusion) and is never paid there. Payment comes from the Clinical Laboratory Fee Schedule (CLFS) using national limitation amounts and gapfill/crosswalk pricing. The PFS $0 is expected, not a denial.
Both report a dipstick urinalysis without microscopy — the difference is how the strip is read. 81003 uses an automated instrument that scans and records the analytes; 81002 is read manually by visually comparing the strip to a color chart. Pick the code matching the method actually used.
In a CLIA-waived setting, 81003 requires the QW modifier to indicate a waived test. This differs from 81002, which is inherently CLIA-waived and does not take QW. Confirm your CLIA certificate level so the modifier and code combination are correct.
Sources & further reading
Reviewed by the ImmediCare Solutions RCM team
Certified billers and coders handling claims across 50+ specialties nationwide. This entry is reviewed against current payer policy and CMS rules. Last review: Jul 5, 2026.
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