84315 Body fluid specific gravity
Also known as: specific gravity, urine specific gravity, USG
Measurement of specific gravity of body fluids (urine, serum, etc.) reflecting dissolved substance concentration.
In Plain Language
urine concentration test
Clinical Context
Assesses hydration status and urine concentration; elevated in dehydration and diabetes insipidus, decreased in excessive fluid intake.
RVU Information
CPT 84315 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 84315?
CPT 84315 (Body fluid specific gravity) is a Pathology & Lab code. Measurement of specific gravity of body fluids (urine, serum, etc.) reflecting dissolved substance concentration.
Who uses CPT code 84315?
CPT 84315 is used by Clinical Chemistry, Pathology, Laboratory Medicine. Assesses hydration status and urine concentration; elevated in dehydration and diabetes insipidus, decreased in excessive fluid intake.
When is CPT 84315 used?
Assesses hydration status and urine concentration; elevated in dehydration and diabetes insipidus, decreased in excessive fluid intake.
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.