H05.03 Periostitis of orbit

ICD-10-CM Code H05.03: Periostitis of orbit

ICD-10-CM code H05.03 represents periostitis of orbit, classified as a Disease or Syndrome under the parent category of acute inflammation of orbit. The terminology record is active for the 2026 version. Medicare billing articles list more specific laterality codes, such as H05.032 and H05.033, for right and left orbit periostitis. 1 2 3

Plain-language overview

Code H05.03 identifies periostitis of orbit, a condition classified within the ICD-10-CM terminology as a Disease or Syndrome with an active record status. 1

What this code represents

The H05.03 terminology record explicitly lists H05.0, acute inflammation of orbit, as its parent concept, and the code itself has no narrower concepts in the terminology. 1

Coding details

The H05.03 terminology record indicates it has no narrower concepts, while Medicare billing articles identify more specific laterality codes including H05.032 for the right orbit and H05.033 for the left orbit. 1 2 3

The H05.03 code is confirmed across multiple official sources for the 2026 ICD-10-CM version, with the National Cancer Institute and EVS Explore both listing periostitis of orbit as the designated label. 1 4

Documentation considerations

Medicare billing and coding articles for visual fields testing and head and neck imaging list H05.032 for periostitis of the right orbit and H05.033 for periostitis of the left orbit. 2 3

Coverage and utilization context

Medicare billing and coding articles for head and neck imaging and visual fields testing include periostitis of orbit codes, providing guidance for billing alongside associated Local Coverage Determinations. 2 3

What the sources add

The National Cancer Institute terminology record establishes the official preferred name and active status for H05.03, whereas Medicare articles add operational context by listing laterality-specific codes for billing. 1 2 3

Clinical context

The terminology record for H05.03 assigns the semantic type of Disease or Syndrome, and the broader code hierarchy lists it alongside other acute orbital inflammations like cellulitis and osteomyelitis. 1 5

Questions to verify

The supplied excerpts do not establish whether H05.03 without a laterality suffix is a billable code or whether payers reject it in favor of the more specific right or left orbit codes. 1 2 3

Sources

1. ICD-10-CM H05.03 terminology record — National Cancer Institute Enterprise Vocabulary Services; accessed 2026-07-27.
2. Article - Billing and Coding: MRI and CT Scans of the Head and Neck (A57215) — cms.gov; accessed 2026-07-27.
3. Article - Billing and Coding: Visual Fields Testing (A56799) — cms.gov; accessed 2026-07-27.
4. EVS Explore — evsexplore.semantics.cancer.gov; accessed 2026-07-27.
5. Browse Code Systems — vsac.nlm.nih.gov; accessed 2026-07-27.