H05.039 Periostitis of unspecified orbit

Billable ICD-10-CM code, FY2026. Acts as a Complication or Comorbidity (CC) as a secondary diagnosis.

Applies from H05 Disorders of orbit

Excludes1 (never code together)

• congenital malformation of orbit (Q10.7)

MS-DRG index

Defines the logic of DRG(s) 121-122 in MDC 02.

Approximate ICD-9-CM (GEMs)

• 376.02 Orbital periostitis (approximate)

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 H05.039

Back-references to H05.0

• Type 2 Excludes: L02.0 Cutaneous abscess, furuncle and carbuncle of face ("abscess of orbit (H05.0)")
• Type 2 Excludes: M86 Osteomyelitis ("orbit (H05.0-)")

Nearby codes

• H05.029 Osteomyelitis of unspecified orbit
• H05.03 Periostitis of orbit
• H05.031 Periostitis of right orbit
• H05.032 Periostitis of left orbit
• H05.033 Periostitis of bilateral orbits
• H05.039 Periostitis of unspecified orbit (this code)
• H05.04 Tenonitis of orbit
• H05.041 Tenonitis of right orbit
• H05.042 Tenonitis of left orbit
• H05.043 Tenonitis of bilateral orbits
• H05.049 Tenonitis of unspecified orbit