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See a sample rate comparisonCPT 83521 Fee Schedule
Last Verified: October 2026
Healthcare providers use this code to document and receive reimbursement for visits that address moderate-level medical decision-making, often including multiple diagnoses or prescription management.
Lab Test To Identify Infection, This Test Measures The Antibodies In A Blood Sample And Is Used To Identify Various Bacteria And Viruses.
| Key Fact | Detail |
|---|---|
| Service Type | Pathology and Laboratory Procedures Chemistry Procedures |
| Common Place of Service | 81 - Independent Laboratory 11 - Office |
| Common Modifiers | 59 - Distinct Procedural Service 91 - Repeat Lab Test |
| Complexity Level | Low |
| Medicare Fee Schedule | $17.27 national lab fee schedule rate (2026) · View Medicare rates for 83521 |
| Medicaid Fee Schedule | $16.88 median of the 8 states in the free preview · View Medicaid rates for 83521 |
National average reimbursement for CPT 83521 by major payers:
$13.37
$10.42
$17.35
$51.12
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CPT 83521
5 of 25 sample ratesHigher to lower in this preview
Imtiaz Ahmad
Kelsey-Seybold Medical Group PLLC
$30.17Published rateJessica Tunis
Adventist Health System-Sunbelt Inc
$10.35Published rateM Hamoui
Access Health Care Physicians LLC
$7.25Published rateMark Talbert
Talbert General Surgery LLC
$7.25Published rateKwabena Pobi
$6.03Published rate
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Payer Contract Negotiation
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See a sample payer proposalCPT 83521 vs. Other Chemistry Procedures Codes
The CPT 83521 code is part of the Pathology and Laboratory Procedures services used for Chemistry Procedures. It represents a moderate-complexity encounter and is one of several codes that vary based on time spent, level of medical decision-making, and documentation requirements.
The CPT 83521 code involves more provider time and moderate medical decision-making, unlike lower-level codes that require less time and simpler assessments. It typically includes multiple diagnoses, medication management, or test interpretation, leading to higher reimbursement and more detailed documentation requirements.
| Code | Complexity | Description |
|---|---|---|
| 83516-CPT | Low | Immunoassay For Analyte Other, Immunoassay For Analyte Other Than Infectious Agent Antibody Or Infectious Agent Antigen Qualitative Or Semiquantitative Multiple Step Method |
| 83518-CPT | Low | Immunoassay For Analyte Other, Immunoassay For Analyte Other Than Infectious Agent Antibody Or Infectious Agent Antigen Qualitative Or Semiquantitative Single Step Method (Eg Reagent Strip) |
| 83519-CPT | Low | Immunoassay For Analyte Other, Immunoassay For Analyte Other Than Infectious Agent Antibody Or Infectious Agent Antigen Quantitative By Radioimmunoassay (Eg Ria) |
| 83521-CPT | Low | Lab Test To Identify Infection, This Test Measures The Antibodies In A Blood Sample And Is Used To Identify Various Bacteria And Viruses. |
What is a fee schedule?
A fee schedule is a list of fixed prices that healthcare providers charge for specific services, including CPT 83521. These prices vary depending on payer type (Medicare, Medicaid, private insurance), geographic location, and provider contracts.
Understanding the 83521 fee schedule helps patients estimate costs and providers optimize billing for accurate reimbursements.
Factors that affect fee schedules
Medicare & Medicaid Rates
Government-set reimbursement amounts
Private Insurance Rates
Negotiated rates between providers and insurance companies
Geographic Location
Costs may be higher in urban areas.
Provider Type
Hospital providers may have different rates than private practice.
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