ICD-10-CM Alphabetic Index · FY 2026 125 Entries
Otitis in the ICD-10-CM Index ICD-10-CM
The main term Otitis (acute) carries 125 index entries pointing to 43 ICD-10-CM codes. The default entry is H66.90, the code the bare main term maps to; every indented line below refines the term by site, cause, or type. Verify any candidate code in the Tabular List before using it.
✓ Built from the official CMS FY 2026 index fileEffective Oct 1, 2025 – Sep 30, 2026
125
Index Entries
43
Codes Referenced
H66.90
Default Code
O
Letter
125 of 125 shown
ICD-10-CM
Index Entries Under Otitis 125 entries · 43 codes
Otitis (acute) H66.90
with effusion see also Otitis, media, nonsuppurative
purulent see Otitis, media, suppurative
adhesive
chronic see also Otitis, media, chronic
with effusion see also Otitis, media, nonsuppurative, chronic
externa H60.9 Non-billable
abscess see Abscess, ear, external
acute (noninfective) H60.50 Non-billable
actinic H60.51 Non-billable
chemical H60.52 Non-billable
contact H60.53 Non-billable
eczematoid H60.54 Non-billable
infective see Otitis, externa, infective
reactive H60.55 Non-billable
specified NEC H60.59 Non-billable
cellulitis see Cellulitis, ear
chronic H60.6 Non-billable
diffuse see Otitis, externa, infective, diffuse
hemorrhagic see Otitis, externa, infective, hemorrhagic
in (due to)
aspergillosis B44.89
candidiasis B37.84
erysipelas A46
herpes (simplex) virus infection B00.1
zoster B02.8
impetigo L01.00
infectious disease NEC B99 Non-billable
mycosis NEC B36.9
parasitic disease NEC B89
viral disease NEC B34.9
zoster B02.8
infective NEC H60.39 Non-billable
abscess see Abscess, ear, external
cellulitis see Cellulitis, ear
diffuse H60.31 Non-billable
hemorrhagic H60.32 Non-billable
swimmer's ear see Swimmer's, ear
malignant H60.2 Non-billable
mycotic NEC B36.9
in
aspergillosis B44.89
candidiasis B37.84
moniliasis B37.84
necrotizing see Otitis, externa, malignant
Pseudomonas aeruginosa see Otitis, externa, malignant
reactive see Otitis, externa, acute, reactive
specified NEC
tropical NEC B36.9
in
aspergillosis B44.89
candidiasis B37.84
moniliasis B37.84
insidiosa see Otosclerosis
interna
media (hemorrhagic) (staphylococcal) (streptococcal) H66.9 Non-billable
with effusion (nonpurulent) see Otitis, media, nonsuppurative
acute, subacute H66.90
allergic see Otitis, media, nonsuppurative, acute, allergic
exudative see Otitis, media, suppurative, acute
mucoid see Otitis, media, nonsuppurative, acute
necrotizing see also Otitis, media, suppurative, acute
in
measles B05.3
scarlet fever A38.0
nonsuppurative NEC see Otitis, media, nonsuppurative, acute
purulent see Otitis, media, suppurative, acute
sanguinous see Otitis, media, nonsuppurative, acute
secretory see Otitis, media, nonsuppurative, acute, serous
seromucinous see Otitis, media, nonsuppurative, acute
serous see Otitis, media, nonsuppurative, acute, serous
suppurative see Otitis, media, suppurative, acute
allergic see Otitis, media, nonsuppurative
catarrhal see Otitis, media, nonsuppurative
chronic H66.90
with effusion (nonpurulent) see Otitis, media, nonsuppurative, chronic
allergic see Otitis, media, nonsuppurative, chronic, allergic
benign suppurative see Otitis, media, suppurative, chronic, tubotympanic
catarrhal see Otitis, media, nonsuppurative, chronic, serous
exudative see Otitis, media, nonsuppurative, chronic
mucinous see Otitis, media, nonsuppurative, chronic, mucoid
mucoid see Otitis, media, nonsuppurative, chronic, mucoid
nonsuppurative NEC see Otitis, media, nonsuppurative, chronic
purulent see Otitis, media, suppurative, chronic
secretory see Otitis, media, nonsuppurative, chronic, mucoid
seromucinous see Otitis, media, nonsuppurative, chronic
serous see Otitis, media, nonsuppurative, chronic, serous
suppurative see Otitis, media, suppurative, chronic
transudative see Otitis, media, nonsuppurative, chronic, mucoid
exudative see Otitis, media, suppurative
in (due to) (with)
influenza see Influenza, with, otitis media
measles B05.3
scarlet fever A38.0
tuberculosis A18.6
viral disease NEC B34.
mucoid see Otitis, media, nonsuppurative
nonsuppurative H65.9 Non-billable
acute or subacute NEC H65.19 Non-billable
allergic H65.11 Non-billable
recurrent H65.11 Non-billable
recurrent H65.19 Non-billable
secretory see Otitis, media, nonsuppurative, serous
serous H65.0 Non-billable
recurrent H65.0 Non-billable
chronic H65.49 Non-billable
allergic H65.41 Non-billable
mucoid H65.3 Non-billable
serous H65.2 Non-billable
postmeasles B05.3
purulent see Otitis, media, suppurative
secretory see Otitis, media, nonsuppurative
seromucinous see Otitis, media, nonsuppurative
serous see Otitis, media, nonsuppurative
suppurative H66.4 Non-billable
acute H66.00 Non-billable
with rupture of ear drum H66.01 Non-billable
recurrent H66.00 Non-billable
with rupture of ear drum H66.01 Non-billable
atticoantral H66.2 Non-billable
benign see Otitis, media, suppurative, chronic, tubotympanic
tubotympanic H66.1 Non-billable
transudative see Otitis, media, nonsuppurative
tuberculous A18.6
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Related Index Terms
Source: Centers for Medicare & Medicaid Services, FY 2026 ICD-10-CM Index to Diseases and Injuries release files, effective October 1, 2025 through September 30, 2026.
