ICD-10-CM 2027
ICD-10 code for allergy testing
Confirmed by the official ICD-10-CM index entry “test, tests, testing (for) › skin, diagnostic › allergy”. Page updated September 29, 2026.
About coding allergy testing
The ICD-10-CM code for allergy testing is Z01.82 (Encounter for allergy testing).
Within Z01.8 (encounter for other specified special examinations), Z01.82 is specifically for encounter for allergy testing. Related codes cover preprocedural examinations (Z01.81), blood typing (Z01.83), antibody response examination (Z01.84) and other specified special examinations (Z01.89).
Don't report Z01.82 together with the conditions in its Excludes1 note: encounter for antibody response examination (Z01.84).
It is not a CC or MCC, so as a secondary diagnosis it doesn't change the MS-DRG severity level.
Don't confuse with (Excludes1 for Z01.82)
- encounter for antibody response examination (Z01.84)
Common questions about allergy testing ICD-10 codes
What is the ICD-10 code for allergy testing?
- Z01.82 — Encounter for allergy testing.
Is Z01.82 billable?
- Yes. Z01.82 is a billable/specific ICD-10-CM code valid for FY2027 (October 1, 2026 – September 30, 2027).
Can Z01.82 be used as a principal diagnosis?
- No. It is not acceptable as the principal diagnosis for an inpatient stay; it may be reported as a secondary diagnosis.
Is Z01.82 a CC or MCC?
- No. Z01.82 is neither a CC nor an MCC under MS-DRG v44.0.