S09.399A Other specified injury of unspecified middle and inner ear, initial encounter

Billable ICD-10-CM code, FY2026.

Built from S09.399 with 7th character A (initial encounter).

Applies from S09 Other and unspecified injuries of head

7th character note

• The appropriate 7th character is to be added to each code from category S09

7th character required

• A — initial encounter
• D — subsequent encounter
• S — sequela

Applies from S09.3 Other specified and unspecified injury of middle and inner ear

Excludes1 (never code together)

• injury to ear NOS (S09.91-)

Excludes2 (not included here)

• injury to external ear (S00.4-, S01.3-, S08.1-)

Applies from S09.39 Other specified injury of middle and inner ear

Applicable to

• Secondary blast injury to ear

Medicare Code Edits (MCE v43.1 (April 2026))

• Unspecified code (laterality): Unspecified codes for which a more specific code identifying laterality (right, left, bilateral) exists within the same code family.

Code annotations containing back-references to S09.399A

Back-references to S09

• Code Also: G96.00 Cerebrospinal fluid leak, unspecified ("head injury (S00-S09)")
• Code Also: G96.08 Other cranial cerebrospinal fluid leak ("head injury (S00 - S09)")
• Code Also: G96.09 Other spinal cerebrospinal fluid leak ("head injury (S00 - S09)")

Nearby codes

• S09.392 Other specified injury of left middle and inner ear
• S09.392A Other specified injury of left middle and inner ear, initial encounter
• S09.392D Other specified injury of left middle and inner ear, subsequent encounter
• S09.392S Other specified injury of left middle and inner ear, sequela
• S09.399 Other specified injury of unspecified middle and inner ear
• S09.399A Other specified injury of unspecified middle and inner ear, initial encounter (this code)
• S09.399D Other specified injury of unspecified middle and inner ear, subsequent encounter
• S09.399S Other specified injury of unspecified middle and inner ear, sequela
• S09.8 Other specified injuries of head
• S09.8XXA Other specified injuries of head, initial encounter
• S09.8XXD Other specified injuries of head, subsequent encounter