ICD-10-CM 2027
ICD-10 code for otitis media
Confirmed by the official ICD-10-CM index entry “otitis (acute) › media (hemorrhagic) (staphylococcal) (streptococcal)”. Page updated September 29, 2026.
About coding otitis media
The ICD-10-CM code for otitis media is H66.90 (Otitis media, unspecified, unspecified ear). The official index lists 79 more specific codes, so check the documentation for details such as type, cause, site or severity before settling on H66.90.
It is also searched as ear infection.
Within H66.9, choose H66.90 (unspecified ear) only when documentation doesn't support a more specific option: right ear (H66.91), left ear (H66.92) and bilateral (H66.93).
Use an additional code to identify: exposure to environmental tobacco smoke (Z77.22), exposure to tobacco smoke in the perinatal period (P96.81), history of tobacco dependence (Z87.891), occupational exposure to environmental tobacco smoke (Z57.31), tobacco dependence (F17.-) and 1 more.
It is not a CC or MCC, so as a secondary diagnosis it doesn't change the MS-DRG severity level.
Related Otitis media codes
- H65.00 Acute serous otitis media, unspecified ear
- H65.01 Acute serous otitis media, right ear
- H65.02 Acute serous otitis media, left ear
- H65.03 Acute serous otitis media, bilateral
- H65.04 Acute serous otitis media, recurrent, right ear
- H65.05 Acute serous otitis media, recurrent, left ear
- H65.06 Acute serous otitis media, recurrent, bilateral
- H65.07 Acute serous otitis media, recurrent, unspecified ear
- H65.111 Acute and subacute allergic otitis media (mucoid) (sanguinous) (serous), right ear
- H65.112 Acute and subacute allergic otitis media (mucoid) (sanguinous) (serous), left ear
- H65.113 Acute and subacute allergic otitis media (mucoid) (sanguinous) (serous), bilateral
- H65.114 Acute and subacute allergic otitis media (mucoid) (sanguinous) (serous), recurrent, right ear
- H65.115 Acute and subacute allergic otitis media (mucoid) (sanguinous) (serous), recurrent, left ear
- H65.116 Acute and subacute allergic otitis media (mucoid) (sanguinous) (serous), recurrent, bilateral
- H65.117 Acute and subacute allergic otitis media (mucoid) (sanguinous) (serous), recurrent, unspecified ear
- H65.119 Acute and subacute allergic otitis media (mucoid) (sanguinous) (serous), unspecified ear
- H65.191 Other acute nonsuppurative otitis media, right ear
- H65.192 Other acute nonsuppurative otitis media, left ear
- H65.193 Other acute nonsuppurative otitis media, bilateral
- H65.194 Other acute nonsuppurative otitis media, recurrent, right ear
- H65.195 Other acute nonsuppurative otitis media, recurrent, left ear
- H65.196 Other acute nonsuppurative otitis media, recurrent, bilateral
- H65.197 Other acute nonsuppurative otitis media recurrent, unspecified ear
- H65.199 Other acute nonsuppurative otitis media, unspecified ear
- H65.20 Chronic serous otitis media, unspecified ear
- H65.21 Chronic serous otitis media, right ear
- H65.22 Chronic serous otitis media, left ear
- H65.23 Chronic serous otitis media, bilateral
- H65.30 Chronic mucoid otitis media, unspecified ear
- H65.31 Chronic mucoid otitis media, right ear
- H65.32 Chronic mucoid otitis media, left ear
- H65.33 Chronic mucoid otitis media, bilateral
- H65.411 Chronic allergic otitis media, right ear
- H65.412 Chronic allergic otitis media, left ear
- H65.413 Chronic allergic otitis media, bilateral
- H65.419 Chronic allergic otitis media, unspecified ear
- H65.491 Other chronic nonsuppurative otitis media, right ear
- H65.492 Other chronic nonsuppurative otitis media, left ear
- H65.493 Other chronic nonsuppurative otitis media, bilateral
- H65.499 Other chronic nonsuppurative otitis media, unspecified ear
- H65.90 Unspecified nonsuppurative otitis media, unspecified ear
- H65.91 Unspecified nonsuppurative otitis media, right ear
- H65.92 Unspecified nonsuppurative otitis media, left ear
- H65.93 Unspecified nonsuppurative otitis media, bilateral
- H66.001 Acute suppurative otitis media without spontaneous rupture of ear drum, right ear
- H66.002 Acute suppurative otitis media without spontaneous rupture of ear drum, left ear
- H66.003 Acute suppurative otitis media without spontaneous rupture of ear drum, bilateral
- H66.004 Acute suppurative otitis media without spontaneous rupture of ear drum, recurrent, right ear
- H66.005 Acute suppurative otitis media without spontaneous rupture of ear drum, recurrent, left ear
- H66.006 Acute suppurative otitis media without spontaneous rupture of ear drum, recurrent, bilateral
- H66.007 Acute suppurative otitis media without spontaneous rupture of ear drum, recurrent, unspecified ear
- H66.009 Acute suppurative otitis media without spontaneous rupture of ear drum, unspecified ear
- H66.011 Acute suppurative otitis media with spontaneous rupture of ear drum, right ear
- H66.012 Acute suppurative otitis media with spontaneous rupture of ear drum, left ear
- H66.013 Acute suppurative otitis media with spontaneous rupture of ear drum, bilateral
- H66.014 Acute suppurative otitis media with spontaneous rupture of ear drum, recurrent, right ear
- H66.015 Acute suppurative otitis media with spontaneous rupture of ear drum, recurrent, left ear
- H66.016 Acute suppurative otitis media with spontaneous rupture of ear drum, recurrent, bilateral
- H66.017 Acute suppurative otitis media with spontaneous rupture of ear drum, recurrent, unspecified ear
- H66.019 Acute suppurative otitis media with spontaneous rupture of ear drum, unspecified ear
- H66.10 Chronic tubotympanic suppurative otitis media, unspecified
- H66.11 Chronic tubotympanic suppurative otitis media, right ear
- H66.12 Chronic tubotympanic suppurative otitis media, left ear
- H66.13 Chronic tubotympanic suppurative otitis media, bilateral
- H66.20 Chronic atticoantral suppurative otitis media, unspecified ear
- H66.21 Chronic atticoantral suppurative otitis media, right ear
- H66.22 Chronic atticoantral suppurative otitis media, left ear
- H66.23 Chronic atticoantral suppurative otitis media, bilateral
- H66.3X1 Other chronic suppurative otitis media, right ear
- H66.3X2 Other chronic suppurative otitis media, left ear
- H66.3X3 Other chronic suppurative otitis media, bilateral
- H66.3X9 Other chronic suppurative otitis media, unspecified ear
- H66.40 Suppurative otitis media, unspecified, unspecified ear
- H66.41 Suppurative otitis media, unspecified, right ear
- H66.42 Suppurative otitis media, unspecified, left ear
- H66.43 Suppurative otitis media, unspecified, bilateral
- H66.91 Otitis media, unspecified, right ear
- H66.92 Otitis media, unspecified, left ear
- H66.93 Otitis media, unspecified, bilateral
Common questions about otitis media ICD-10 codes
What is the ICD-10 code for otitis media?
- H66.90 — Otitis media, unspecified, unspecified ear. More specific codes apply when the documentation supports them: H65.00, H65.01, H65.02, H65.03 and others below.
What is the ICD-10 code for acute serous otitis media, unspecified ear?
- H65.00 — Acute serous otitis media, unspecified ear.
What is the ICD-10 code for acute serous otitis media, right ear?
- H65.01 — Acute serous otitis media, right ear.
What is the ICD-10 code for acute serous otitis media, left ear?
- H65.02 — Acute serous otitis media, left ear.
What is the ICD-10 code for acute serous otitis media, bilateral?
- H65.03 — Acute serous otitis media, bilateral.
What is the ICD-10 code for acute serous otitis media, recurrent, right ear?
- H65.04 — Acute serous otitis media, recurrent, right ear.
What is the ICD-10 code for acute serous otitis media, recurrent, left ear?
- H65.05 — Acute serous otitis media, recurrent, left ear.
Is H66.90 billable?
- Yes. H66.90 is a billable/specific ICD-10-CM code valid for FY2027 (October 1, 2026 – September 30, 2027).
Can H66.90 be used as a principal diagnosis?
- Yes. The Medicare Code Editor doesn't restrict H66.90 as a principal diagnosis.
Is H66.90 a CC or MCC?
- No. H66.90 is neither a CC nor an MCC under MS-DRG v44.0.