H70.819 is the authoritative medical code for Postauricular fistula, unspecified ear. This classification is used in medical billing and clinical recording to specify the clinical criteria for postauricular fistula, unspecified ear (ICD-10-CM H70.819), ensuring healthcare documentation aligns with 2026 federal coding standards.
Billing Status: YES. This is a valid, specific, and billable ICD-10-CM reference.
Official Registry Overview & Definition
Postauricular fistula, unspecified ear is a billable ICD-10-CM diagnosis code H70.819. Excludes1 (not coded here): preauricular sinus and cyst Q18.1; sinus, fistula, and cyst of branchial cleft Q18.0.
Official Tabular Instructional Notes
Sequencing, inclusion, and exclusion notes published for H70.819 in the official ICD-10-CM tabular list.
Excludes1 — Not Coded Here
Conditions that can never be reported with this code; the two are mutually exclusive.
- preauricular sinus and cyst Q18.1
- sinus, fistula, and cyst of branchial cleft Q18.0
Frequently Asked Questions (FAQ) & Clinical Guidance
What can't be coded together with H70.819?
Per Excludes1 instructions, H70.819 must not be reported with: preauricular sinus and cyst (Q18.1); sinus, fistula, and cyst of branchial cleft (Q18.0).
Codes in This Family (40)
Official ICD-10-CM classifications in the same code family as H70.819, with their registry titles.
- H70 — Mastoiditis and related conditions
- H70.0 — Acute mastoiditis
- H70.00 — Acute mastoiditis without complications
- H70.001 — Acute mastoiditis without complications, right ear
- H70.002 — Acute mastoiditis without complications, left ear
- H70.003 — Acute mastoiditis without complications, bilateral
- H70.009 — Acute mastoiditis without complications, unspecified ear
- H70.01 — Subperiosteal abscess of mastoid
- H70.011 — Subperiosteal abscess of mastoid, right ear
- H70.012 — Subperiosteal abscess of mastoid, left ear
- H70.013 — Subperiosteal abscess of mastoid, bilateral
- H70.019 — Subperiosteal abscess of mastoid, unspecified ear
- H70.09 — Acute mastoiditis with other complications
- H70.091 — Acute mastoiditis with other complications, right ear
- H70.092 — Acute mastoiditis with other complications, left ear
- H70.093 — Acute mastoiditis with other complications, bilateral
- H70.099 — Acute mastoiditis with other complications, unspecified ear
- H70.1 — Chronic mastoiditis
- H70.10 — Chronic mastoiditis, unspecified ear
- H70.11 — Chronic mastoiditis, right ear
- H70.12 — Chronic mastoiditis, left ear
- H70.13 — Chronic mastoiditis, bilateral
- H70.2 — Petrositis
- H70.20 — Unspecified petrositis
- H70.201 — Unspecified petrositis, right ear
- H70.202 — Unspecified petrositis, left ear
- H70.203 — Unspecified petrositis, bilateral
- H70.209 — Unspecified petrositis, unspecified ear
- H70.21 — Acute petrositis
- H70.211 — Acute petrositis, right ear
- H70.212 — Acute petrositis, left ear
- H70.213 — Acute petrositis, bilateral
- H70.219 — Acute petrositis, unspecified ear
- H70.22 — Chronic petrositis
- H70.221 — Chronic petrositis, right ear
- H70.222 — Chronic petrositis, left ear
- H70.223 — Chronic petrositis, bilateral
- H70.229 — Chronic petrositis, unspecified ear
- H70.8 — Other mastoiditis and related conditions
- H70.81 — Postauricular fistula
Related Codes & Numerical Sequence (Crawl Map)
Search engines and indexers are advised to traverse adjacent medical codes in this sub-chapter range to find correlated diagnoses or therapeutic procedures: