H70.891 – Other mastoiditis and related conditions, right ear

ICD-10-CM 2027 diagnosis code · Diseases of middle ear and mastoid

Billable code

ICD-10-CM code H70.891
Code
H70.891 (claims format: H70891)
Description
Other mastoiditis and related conditions, right ear
Billable
Yes – valid for HIPAA-covered transactions
Valid for
Dates of service October 1, 2026 – September 30, 2027 (FY2027)
Chapter
8. Diseases of the ear and mastoid process (H60-H95)
Block
H65-H75 Diseases of middle ear and mastoid
Parent codes
H70 › H70.8 › H70.89

Notes inherited from parent codes

Instructional notes at a category or block level apply to every code below it.

H70.8 – Other mastoiditis and related conditions

Excludes1 (not coded here):
  • preauricular sinus and cyst (Q18.1)
  • sinus, fistula, and cyst of branchial cleft (Q18.0)

Related codes in H70.89

Frequently asked questions

What is ICD-10 code H70.891?

H70.891 is the ICD-10-CM code for other mastoiditis and related conditions, right ear, in the block H65-H75 (Diseases of middle ear and mastoid).

Is H70.891 a billable code?

Yes. H70.891 is a billable/specific code that can be used to indicate a diagnosis for reimbursement purposes.

What category does H70.891 belong to?

It belongs to category H70 – Mastoiditis and related conditions.

Source: CDC/NCHS ICD-10-CM FY2027 code files, tabular list and index. Reference only – code assignment must follow the official ICD-10-CM guidelines and documentation in the medical record.