ICD-10-CM 2027
ICD-10 code for Ophthalmia
From the official ICD-10-CM alphabetic index entry “Ophthalmia”. Page updated September 29, 2026.
About coding Ophthalmia
The ICD-10-CM code for Ophthalmia is H10.9 (Unspecified conjunctivitis). The official index lists 7 more specific codes, so check the documentation for details such as type, cause, site or severity before settling on H10.9.
Within H10, choose H10.9 (Unspecified conjunctivitis) only when documentation doesn't support a more specific option: mucopurulent conjunctivitis (H10.0), acute atopic conjunctivitis (H10.1), other acute conjunctivitis (H10.2), unspecified acute conjunctivitis (H10.3), chronic conjunctivitis (H10.4), blepharoconjunctivitis (H10.5) and other conjunctivitis (H10.8).
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 124 (Other Disorders of the Eye with MCC or Thrombolytic Agent, relative weight 1.2471) and DRG 125 (Other Disorders of the Eye without MCC, relative weight 0.7702), in MDC 02 (Diseases and Disorders of the Eye), 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 Ophthalmia codes (official index)
- actinic rays
- allergic (acute)
- blennorrhagic (gonococcal) (neonatorum) A54.31 — Gonococcal conjunctivitis
- diphtheritic A36.86 — Diphtheritic conjunctivitis
- Egyptian A71.1 — Active stage of trachoma
- electrica
- gonococcal (neonatorum) A54.31 — Gonococcal conjunctivitis
- metastatic
- migraine
- neonatorum, newborn P39.1 — Neonatal conjunctivitis and dacryocystitis
- gonococcal A54.31 — Gonococcal conjunctivitis
- nodosa H16.24 — Ophthalmia nodosa
- purulent
- spring
- sympathetic
Common questions about Ophthalmia ICD-10 codes
What is the ICD-10 code for Ophthalmia?
- H10.9 — Unspecified conjunctivitis. More specific codes apply when the documentation supports them: A54.31, A36.86, A71.1, A54.31 and others below.
What is the ICD-10 code for blennorrhagic ophthalmia?
- A54.31 — Gonococcal conjunctivitis.
What is the ICD-10 code for diphtheritic ophthalmia?
- A36.86 — Diphtheritic conjunctivitis.
What is the ICD-10 code for egyptian ophthalmia?
- A71.1 — Active stage of trachoma.
What is the ICD-10 code for gonococcal ophthalmia?
- A54.31 — Gonococcal conjunctivitis.
What is the ICD-10 code for nodosa ophthalmia?
- H16.24 — Ophthalmia nodosa (header code; choose a more specific subcode).
Is H10.9 billable?
- Yes. H10.9 is a billable/specific ICD-10-CM code valid for FY2027 (October 1, 2026 – September 30, 2027).
Can H10.9 be used as a principal diagnosis?
- Yes. The Medicare Code Editor doesn't restrict H10.9 as a principal diagnosis.
Is H10.9 a CC or MCC?
- No. H10.9 is neither a CC nor an MCC under MS-DRG v44.0.