H66.4Header code — not billable
Suppurative otitis media, unspecified
- Chapter
- 8. Diseases of the ear and mastoid process
- Category
- H66
- Effective date
- October 1, 2026
Related codes in category H66
H66Suppurative and unspecified otitis mediaH66.0Acute suppurative otitis mediaH66.00Acute suppurative otitis media w/o spontaneous rupt ear drumH66.001Acute suppr otitis media w/o spon rupt ear drum, right earYesH66.002Acute suppr otitis media w/o spon rupt ear drum, left earYesH66.003Acute suppr otitis media w/o spon rupt ear drum, bilateralYesH66.004Ac suppr otitis media w/o spon rupt ear drum, recur, r earYesH66.005Ac suppr otitis media w/o spon rupt ear drum, recur, l earYesH66.006Acute suppr otitis media w/o spon rupt ear drum, recur, biYesH66.007Ac suppr otitis media w/o spon rupt ear drum,recur, unsp earYesH66.009Acute suppr otitis media w/o spon rupt ear drum, unsp earYesH66.01Acute suppurative otitis media w spontaneous rupt ear drum
Frequently asked questions
What is ICD-10 code H66.4?
H66.4 is an ICD-10-CM diagnosis code for Suppurative otitis media, unspecified.
Is H66.4 a billable code?
No. H66.4 is a category/header code, not billable on its own — use one of its more specific child codes instead.
What ICD-10-CM chapter is H66.4 in?
H66.4 falls under Chapter 8: Diseases of the ear and mastoid process.
When did H66.4 become effective?
H66.4 has been effective since October 1, 2026, per the CMS/CDC ICD-10-CM annual release.
What other codes are related to H66.4?
H66.4 belongs to category H66, which includes 12 other codes — see the related codes list on this page.
ICD-10-CM data maintained by CDC/CMS (public domain). Always verify codes with authoritative sources before making coding or billing decisions.