G91.3 ICD-10-CA code: Post-traumatic hydrocephalus, unspecified
G91.3 is the ICD-10-CA code for “Post-traumatic hydrocephalus, unspecified” in CIHI’s FY 2026–2027 release, in effect from Apr 1, 2026.
Official description
G91.3Post-traumatic hydrocephalus, unspecified
Short description: Posttraumatic hydrocephalus NOS
ICD-10-CA · Canada · Also written G913
Index terms
Entries in CIHI’s alphabetical index that lead to G91.3. Searching the index by the condition the note names is how coders reach this code.
- Hydrocephalus (acquired) (external) (internal) (malignant) (recurrent), posttraumatic NEC
Notes for G91.3
As CIHI prints them, with any note G91.3 takes from the headings above it.
Includes
- Acquired hydrocephalusFrom G91 Hydrocephalus
Excludes
Conditions classified elsewhere.
- Hydrocephalus:• acquired, of newborn (P91.7)• congenital (Q03.-)• due to congenital toxoplasmosis (P37.1)From G91 Hydrocephalus
- 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 6: Diseases of the nervous system (G00-G99)
Where G91.3 sits
- 1ChapterChapter 6: Diseases of the nervous system (G00-G99)
- 2Block G90-G99Other disorders of the nervous system
- 3Category G91Hydrocephalus
- 4Valid code G91.3Post-traumatic hydrocephalus, unspecified
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 G91.3 mean?
G91.3 is the ICD-10-CA code for “Post-traumatic hydrocephalus, unspecified” in CIHI’s ICD-10-CA FY 2026–2027 release.
Where is G91.3 in ICD-10-CA?
G91.3 sits under G91 Hydrocephalus, within G90-G99 Other disorders of the nervous system, within Chapter 6: Diseases of the nervous system (G00-G99).
What coding notes apply to G91.3?
ICD-10-CA lists Includes, Excludes notes for G91.3, 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.