81599 Unlisted maaa
Also known as: unlisted molecular test, custom gene panel, research laboratory test
Unlisted molecular assay procedure including multi-analyte molecular pathology assays that do not have a specific current procedural terminology code available.
In Plain Language
specialized gene test; custom molecular assay; advanced laboratory test
Clinical Context
Reported when laboratory performs molecular pathology testing without a designated CPT code, requiring itemized description and physician justification.
RVU Information
CPT 81599 does not have a physician work RVU assigned by CMS. Reimbursement for this code is determined by payer-specific fee schedules.
Billing & Documentation
Lab and pathology codes require an order from the treating provider with clinical indication. For molecular pathology and genetic testing, document the specific analytes tested and clinical rationale.
How This Code Compares
This code has a work RVU of 0.00, meaning it does not have a physician work component assigned by CMS. In the Pathology & Lab category, 94% of codes share this characteristic.
Specialties
Frequently Asked Questions
What is CPT code 81599?
CPT 81599 (Unlisted maaa) is a Pathology & Lab code. Unlisted molecular assay procedure including multi-analyte molecular pathology assays that do not have a specific current procedural terminology code available.
Who uses CPT code 81599?
CPT 81599 is used by Pathology, Molecular Pathology, Research Laboratory. Reported when laboratory performs molecular pathology testing without a designated CPT code, requiring itemized description and physician justification.
When is CPT 81599 used?
Reported when laboratory performs molecular pathology testing without a designated CPT code, requiring itemized description and physician justification.
Track This Code in RVU Edge
Log procedures, calculate wRVUs, and benchmark against national data — all in one app.
CPT® is a registered trademark of the American Medical Association. Data sourced from CMS Physician Fee Schedule RVU26A. Descriptions, synonyms, and clinical context are original content by RVU Edge.