H49.00 — Third [oculomotor] nerve palsy, unspecified eye
Is H49.00 billable?
Yes, but H49.00 is an unspecified code. H49.00 is a valid, billable ICD-10-CM code for encounters from October 1, 2026 through September 30, 2027. However, H49.00 is an unspecified or catch-all code. Payers apply additional scrutiny to unspecified codes and many deny them when the medical record supports a more specific option, so check the documentation before selecting H49.00 — the more specific alternatives are listed below.
H49.00 at a glance
| Code | H49.00 |
|---|---|
| Description | Third [oculomotor] nerve palsy, unspecified eye |
| Billable | Yes |
| Code set | ICD-10-CM FY2027 |
| Valid for encounters | October 1, 2026 – September 30, 2027 |
Which MS-DRGs does H49.00 group to?
H49.00 sits in MDC 02 and helps define the logic of 1 MS-DRG (version 44, FY2027). Which one a stay actually groups to also depends on procedures and secondary diagnoses.
- 123Neurological Eye Disordersmedical
How is H49.00 listed in the Alphabetic Index?
The Alphabetic Index lists these routes under H49.0, the nearest indexed parent of H49.00. Use them to find the family, then select the specific code.
- Strabismus › paralytic › third nerve (congenital) (nonparalytic)
Excludes2 — not included here — inherited from Chapter 7
The conditions below are not part of H49.00, but a patient may have both at the same time. When documentation supports it, H49.00 and the excluded code may both be reported.
- certain conditions originating in the perinatal period (P04-P96)
- certain infectious and parasitic diseases (A00-B99)
- complications of pregnancy, childbirth and the puerperium (O00-O9A)
- congenital malformations, deformations, and chromosomal abnormalities (Q00-Q99)
- diabetes mellitus related eye conditions (E09.3-, E10.3-, E11.3-, E13.3-)
- endocrine, nutritional and metabolic diseases (E00-E88)
- injury (trauma) of eye and orbit (S05.-)
- injury, poisoning and certain other consequences of external causes (S00-T88)
- neoplasms (C00-D49)
- symptoms, signs and abnormal clinical and laboratory findings, not elsewhere classified (R00-R94)
- syphilis related eye disorders (A50.01, A50.3-, A51.43, A52.71)
Excludes2 — not included here — inherited from H49-H52
The conditions below are not part of H49.00, but a patient may have both at the same time. When documentation supports it, H49.00 and the excluded code may both be reported.
- nystagmus and other irregular eye movements (H55)
Excludes2 — not included here — inherited from H49
The conditions below are not part of H49.00, but a patient may have both at the same time. When documentation supports it, H49.00 and the excluded code may both be reported.
How long has H49.00 existed?
H49.00 has been in ICD-10-CM since at least FY2016, the earliest fiscal year on record here.
Derived from the official order files for FY2016–FY2026. FY2017 and FY2020 publish no order file, so those years are not covered.