H70 ICD-10-CA category: Mastoiditis and related conditions
H70 isn’t a code on its own. Choose one of the 5 codes beneath it, the one the documentation supports.
Official description
H70Mastoiditis and related conditions
ICD-10-CA · Canada
Codes in H70
H70 isn’t a code on its own. Open the code that matches what the note documents.
Notes for H70
As CIHI prints them, with any note H70 takes from the headings above it.
Excludes
Conditions classified elsewhere.
- Certain:• conditions originating in the perinatal period (P00-P96)• infectious and parasitic diseases (A00-B99)complications of pregnancy, childbirth and the puerperium (O00-O99)congenital malformations, deformations and chromosomal abnormalities (Q00-Q99)endocrine, nutritional and metabolic diseases (E00-E90)injury, poisoning and certain other consequences of external causes (S00-T98)neoplasms (C00-D48)symptoms, signs and abnormal clinical and laboratory findings, not elsewhere classified (R00-R99)From Chapter 8: Diseases of the ear and mastoid process (H60-H95)
Where H70 sits
- 1ChapterChapter 8: Diseases of the ear and mastoid process (H60-H95)
- 2Block H65-H75Diseases of middle ear and mastoid
- 3Category H70Mastoiditis and related conditions
Source and release
- Data release
- ICD-10-CA · FY 2026–2027
- Effective date
- Apr 1, 2026
- Publisher
- CIHI
This page is built from the ICD-10-CA catalog that Vero Codes reads when it suggests codes: Canadian Institute for Health Information’s FY 2026–2027 release, imported from the publisher’s file and checked against it. The description, notes and structured data come from the same record.
Frequently asked questions
Is H70 a valid ICD-10-CA code?
No. H70 (Mastoiditis and related conditions) is a category heading in CIHI’s ICD-10-CA FY 2026–2027 release. It holds 5 codes; record the one the documentation supports.
Where is H70 in ICD-10-CA?
H70 sits under H65-H75 Diseases of middle ear and mastoid, within Chapter 8: Diseases of the ear and mastoid process (H60-H95).
What coding notes apply to H70?
ICD-10-CA lists Excludes notes for H70, including those from the headings it sits under. They are listed on this page with where each one comes from.
Which ICD-10-CA release does this page use?
It uses CIHI’s FY 2026–2027 release, in effect from Apr 1, 2026 to Mar 31, 2027. It is a reference: confirm the code against the current list and the payer’s rules before you submit it.
Codes beside H70
View H65-H75H65Nonsuppurative otitis mediaH66Suppurative and unspecified otitis mediaH67Otitis media in diseases classified elsewhereH68Eustachian salpingitis and obstructionH69Other disorders of Eustachian tubeH71Cholesteatoma of middle earH72Perforation of tympanic membraneH73Other disorders of tympanic membraneH74Other disorders of middle ear and mastoidH75Other disorders of middle ear and mastoid in diseases classified elsewhere