CPT 86486Laboratory

Skin test unlisted antign ea

CPT code 86486 is used for skin testing with antigens that don't have their own specific CPT code, such as unusual allergens or specialized immune response tests. This is a catch-all code for uncommon skin tests that aren't covered by standard allergy testing codes.

Showing rates for

National Average

Base Medicare rate

$6.15

This calculator gives a typical-case estimate using standard Medicare modifier rules. Actual payment depends on payer policies, documentation, code-specific CMS status indicators, and locality. Verify before billing.

RVU breakdown

Work RVU

PE RVU (NF)

0.18

MP RVU

0.01

Total RVU

0.19

Conversion factor: 32.3465 · Source: CMS MPFS RVU25A · Confidence: High

NCCI bundling edits

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Billing tips

Always submit a detailed special report with 86486 explaining the specific antigen used, why standard codes don't apply, and medical necessity
Impact: Reduces denial rate by approximately 40-60%; unlisted codes require narrative documentation per CPT guidelines
Obtain pre-authorization before performing test with commercial payers; include antigen source, concentration, and clinical rationale
Impact: Prevents outright denials; pre-authorization can improve payment probability from 50% to 85% for unlisted procedures
Consider using specific skin test codes (86490 for coccidioidomycosis, 86510 for histoplasmosis, etc.) if applicable rather than defaulting to unlisted code
Impact: Specific codes have clearer payment policies and fewer denials; ensure 86486 is truly the only appropriate code
Bill only one unit per antigen tested; if testing multiple unlisted antigens, use separate line items with modifier 59 and distinct antigen documentation
Impact: Proper unit billing prevents downcoding; multiple units without justification triggers automatic denials or reduction to single unit
Link to highly specific ICD-10 codes indicating the suspected allergen or condition requiring the unlisted test
Impact: Increases medical necessity support; specific diagnosis codes improve clean claim rate by 25-35% for unlisted procedures
Document reading time, wheal and flare measurements, and interpretation in medical record; photograph reactions when possible
Impact: Strengthens appeal documentation if denied; objective findings support medical necessity and appropriate code selection during audits

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Frequently asked questions

What is the Medicare reimbursement rate for CPT code 86486 in 2025?

The 2025 Medicare national average reimbursement for CPT 86486 is $6.15 for both facility and non-facility settings. This rate is based on 0.19 total RVUs multiplied by the 2025 conversion factor of 32.3465.

When should I use CPT 86486 instead of other skin test codes?

Use CPT 86486 only when testing with an antigen that has no specific CPT code. First verify that standard codes like 86490 (coccidioidomycosis), 86510 (histoplasmosis), 95004-95028 (allergen immunology), or 86580 (tuberculosis) do not apply. Code 86486 is reserved for truly unlisted antigens not covered by any other code.

Does CPT 86486 require a special report for billing?

Yes, as an unlisted procedure code, CPT 86486 requires a special report or detailed documentation explaining the specific antigen used, the testing methodology, why standard codes don't apply, and the medical necessity for testing with this particular unlisted antigen. Without this documentation, claims are typically denied.

How many times can I bill CPT 86486 on the same day?

You can bill CPT 86486 multiple times on the same day only if testing different unlisted antigens. Each antigen should be billed as a separate line item with modifier 59 and accompanied by documentation specifying each distinct unlisted antigen tested and its individual medical necessity.

What RVU value is assigned to CPT code 86486?

CPT 86486 has a total RVU of 0.19, consisting of 0 work RVU, 0.18 practice expense RVU, and 0.01 malpractice RVU. The work RVU is zero because the code primarily represents supplies and minimal technical effort.

Do I need prior authorization to bill CPT 86486?

While Medicare typically does not require prior authorization for 86486, most commercial payers do require pre-authorization for unlisted procedure codes. Contact the specific payer before performing the test to verify their policy and obtain authorization, which significantly improves payment probability.

Can CPT 86486 be billed with an office visit on the same day?

Yes, CPT 86486 can be billed with an E/M service (office visit) on the same day if the visit involves significant separately identifiable evaluation and management beyond the decision to perform the skin test. Append modifier 25 to the E/M code and ensure documentation supports the separate nature of the services.