ICD-10-CM 2027
ICD-10 code for hay allergic fever
From the official ICD-10-CM alphabetic index entry “Fever (inanition) (of unknown origin) (persistent) (with chills) (with rigor) › hay (allergic)”. Page updated September 29, 2026.
About coding hay allergic fever
The ICD-10-CM code for hay allergic fever is J30.1 (Allergic rhinitis due to pollen). The official index lists 5 more specific codes, so check the documentation for details such as type, cause, site or severity before settling on J30.1.
Within J30 (Vasomotor and allergic rhinitis), J30.1 is specifically for allergic rhinitis due to pollen. Related codes cover Vasomotor rhinitis (J30.0), other seasonal allergic rhinitis (J30.2), allergic rhinitis due to food (J30.5), other allergic rhinitis (J30.8) and allergic rhinitis, unspecified (J30.9).
It is not a CC or MCC, so as a secondary diagnosis it doesn't change the MS-DRG severity level.
In MS-DRG v44.0, it is part of the grouping logic for DRG 152 (Otitis Media and URI with MCC, relative weight 1.1151) and DRG 153 (Otitis Media and URI without MCC, relative weight 0.7421), in MDC 03 (Diseases and Disorders of the Ear, Nose, Mouth and Throat), as a principal or secondary diagnosis. The DRG a claim lands in depends on the principal diagnosis, procedures and any CC/MCC secondary diagnoses.
More specific hay allergic fever codes (official index)
- with asthma (bronchial) J45.909 — Unspecified asthma, uncomplicated
- with
- exacerbation (acute) J45.901 — Unspecified asthma with (acute) exacerbation
- status asthmaticus J45.902 — Unspecified asthma with status asthmaticus
- due to
- allergen other than pollen J30.89 — Other allergic rhinitis
- pollen, any plant or tree J30.1 — Allergic rhinitis due to pollen
Common questions about hay allergic fever ICD-10 codes
What is the ICD-10 code for hay allergic fever?
- J30.1 — Allergic rhinitis due to pollen. More specific codes apply when the documentation supports them: J45.909, J45.901, J45.902, J30.89 and others below.
Is J30.1 billable?
- Yes. J30.1 is a billable/specific ICD-10-CM code valid for FY2027 (October 1, 2026 – September 30, 2027).
Can J30.1 be used as a principal diagnosis?
- Yes. The Medicare Code Editor doesn't restrict J30.1 as a principal diagnosis.
Is J30.1 a CC or MCC?
- No. J30.1 is neither a CC nor an MCC under MS-DRG v44.0.