CPT 83520
Updated 5/6/2025
Reviewed by Nathan Liu, MD

Immunoassay quantification of non-infectious analytes

Description

This code is utilized for the quantitative measurement of analytes using immunoassay techniques when no specific code exists for the test performed. It applies to substances that are neither infectious agent antibodies nor antigens, ensuring accurate laboratory reporting for a variety of non-infectious analytes.

Medicare Hospital Outpatient Reimbursement (OPPS)

OPPS Payment Rate

Patient Copayment / Coinsurance

Top Modifiers
Code Crosswalks

No crosswalks found.

Alternate Codes

No alternates found.

Billed With Codes

No codes found here.

Sources

We make no claims to ownership of the coding systems referenced on this platform. Codes and descriptions are produced from claims and chargemaster data available through the CMS-9915-F Transparency in Coverage Final Rule and via state or federal datasets. This service is provided solely as a reference to encourage use of these codes in our chargemaster review and automated billing tools, so that healthcare professionals can understand and correctly report these codes in their claims.

Federal and State Datasets

  • List of CPT/HCPCS Codes, Centers for Medicare & Medicaid Services (CMS)
  • I/OCE Quarterly Release Files, Centers for Medicare & Medicaid Services (CMS)
  • Physician Fee Schedule Relative Value Files, Centers for Medicare & Medicaid Services (CMS)
  • OPPS Addendum B, Centers for Medicare & Medicaid Services (CMS)
  • ASC Payment Addenda, Centers for Medicare & Medicaid Services (CMS)