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See a sample rate comparisonCPT 84100 Fee Schedule
Medicare rates as of January 2026
CPT 84100 is classified under Pathology and Laboratory Procedures, in the Chemistry Procedures subgroup.
Phosphorus Trace Element Test, The Phosphorus Test Checks For Calcium Absorption And Kidney Function. Phosphorus Is A Trace Element Required For Proper Digestion Bone Formation And Kidney Health. It Aids The Balance Of Calcium Potassium And Glucose.
| Key Fact | Detail |
|---|---|
| Service Type | Pathology and Laboratory Procedures Chemistry Procedures |
| Common Place of Service | 21 - Inpatient Hospital 81 - Independent Laboratory |
| Common Modifiers | 26 - Professional component TC - Technical component |
| Complexity Level | Low |
| Medicare Fee Schedule | $4.74 national lab fee schedule rate (2026) · View Medicare rates for 84100 |
| Medicaid Fee Schedule | $4.68 median of the 8 states in the free preview · View Medicaid rates for 84100 |
National average reimbursement for CPT 84100 by major payers:
$3.76
BCBS / Anthem
$3.37
UnitedHealthcare
$6.02
Aetna
$6.81
Cigna
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CPT 84100
5 of 25 sample ratesHigher to lower in this preview
Christopher Todd
Southeast Alaska Regional Health Consortium
$11.69Published rateJonathan Waldmann
$4.73Published rateCristina Rabaza
Salud Family Health
$2.91Published rateGretchen Sonnenberg
Peak Vista Community Health Centers
$2.71Published rateComplete Family Care P.C.
Catholic Health Initiatives Colorado
$1.99Published rate
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Payer Contract Negotiation
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See a sample payer proposalCPT 84100 vs. Other Chemistry Procedures Codes
The table lists codes related to 84100. Select one to see its fee schedule.
| Code | Complexity | Description |
|---|---|---|
| 84100-CPT | Low | Phosphorus Trace Element Test, The Phosphorus Test Checks For Calcium Absorption And Kidney Function. Phosphorus Is A Trace Element Required For Proper Digestion Bone Formation And Kidney Health. It Aids The Balance Of Calcium Potassium And Glucose. |
| 84105-CPT | Low | Phosphorus Trace Element Test, The Urine Phosphorus Test Checks For Calcium Absorption And Kidney Function. Phosphorus Is A Trace Element Required For Proper Digestion Bone Formation And Kidney Health. It Aids The Balance Of Calcium Potassium And Glucose. |
| 84132-CPT | Low | Potassium Electrolyte Test, Potassium Is An Electrolyte Critical For Heart And Skeletal Muscles. The Blood Test Measures Overall Potassium. The Urine Test Verifies High Levels Related To Kidney Disease. |
| 84160-CPT | Low | Total Body Protein Test, This Test Measures The Quantity Of Proteins Traveling Through Body Fluids Rather Than Moving Into Cells. |
What is a fee schedule?
A fee schedule is a list of fixed prices that healthcare providers charge for specific services, including CPT 84100. These prices vary depending on payer type (Medicare, Medicaid, private insurance), geographic location, and provider contracts.
Understanding the 84100 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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