84591 Assay of not otherwise specified vitamin
Also known as: vitamin NOS assay, other vitamin measurement
Quantitative assay of not otherwise specified (NOS) vitamins in serum or urine, a catch-all code for vitamin measurement not specifically coded elsewhere.
In Plain Language
vitamin level test; other vitamin measurement
Clinical Context
Used when measuring vitamin levels not covered by specific codes (84590, 84597); includes various vitamin assays performed by specialty laboratories.
RVU Information
CPT 84591 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 84591?
CPT 84591 (Assay of not otherwise specified vitamin) is a Pathology & Lab code. Quantitative assay of not otherwise specified (NOS) vitamins in serum or urine, a catch-all code for vitamin measurement not specifically coded elsewhere.
Who uses CPT code 84591?
CPT 84591 is used by Clinical Pathology, Nutrition, Internal Medicine. Used when measuring vitamin levels not covered by specific codes (84590, 84597); includes various vitamin assays performed by specialty laboratories.
When is CPT 84591 used?
Used when measuring vitamin levels not covered by specific codes (84590, 84597); includes various vitamin assays performed by specialty laboratories.
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.