H48.1 ICD-10-CA code: Retrobulbar neuritis in diseases classified elsewhere
H48.1 is the ICD-10-CA code for “Retrobulbar neuritis in diseases classified elsewhere” in CIHI’s FY 2026–2027 release, in effect from Apr 1, 2026.
Official description
H48.1Retrobulbar neuritis in diseases classified elsewhere
Short description: Retrobulbar neuritis in diseases cl/e
ICD-10-CA · Canada · Also written H481
Notes for H48.1
As CIHI prints them, with any note H48.1 takes from the headings above it.
Includes
- Retrobulbar neuritis in:• late syphilis (A52.1†)• meningococcal infection (A39.8†)• multiple sclerosis (G35†)
Excludes
Conditions classified elsewhere.
- Certain:• conditions originating in the perinatal period (P00-P96)• infectious and parasitic diseases (A00-B99)complications of pregnancy, childbirth and the puerperium (O00-O99)congenital malformations, deformations and chromosomal abnormalities (Q00-Q99)endocrine, nutritional and metabolic diseases (E00-E90)injury, poisoning and certain other consequences of external causes (S00-T98)neoplasms (C00-D48)symptoms, signs and abnormal clinical and laboratory findings, not elsewhere classified (R00-R99)From Chapter 7: Diseases of the eye and adnexa (H00-H59)
Where H48.1 sits
- 1ChapterChapter 7: Diseases of the eye and adnexa (H00-H59)
- 2Block H46-H48Disorders of optic nerve and visual pathways
- 3Category H48Disorders of optic [2nd] nerve and visual pathways in diseases classified elsewhere
- 4Valid code H48.1Retrobulbar neuritis in diseases classified elsewhere
Source and release
- Data release
- ICD-10-CA · FY 2026–2027
- Effective date
- Apr 1, 2026
- Publisher
- CIHI
This page is built from the ICD-10-CA catalog that Vero Codes reads when it suggests codes: Canadian Institute for Health Information’s FY 2026–2027 release, imported from the publisher’s file and checked against it. The description, notes and structured data come from the same record.
Frequently asked questions
What does ICD-10-CA code H48.1 mean?
H48.1 is the ICD-10-CA code for “Retrobulbar neuritis in diseases classified elsewhere” in CIHI’s ICD-10-CA FY 2026–2027 release.
Where is H48.1 in ICD-10-CA?
H48.1 sits under H48 Disorders of optic [2nd] nerve and visual pathways in diseases classified elsewhere, within H46-H48 Disorders of optic nerve and visual pathways, within Chapter 7: Diseases of the eye and adnexa (H00-H59).
What coding notes apply to H48.1?
ICD-10-CA lists Includes, Excludes notes for H48.1, including those from the headings it sits under. They are listed on this page with where each one comes from.
Which ICD-10-CA release does this page use?
It uses CIHI’s FY 2026–2027 release, in effect from Apr 1, 2026 to Mar 31, 2027. It is a reference: confirm the code against the current list and the payer’s rules before you submit it.