H18.621 — Keratoconus, unstable, right eye
Is H18.621 billable?
Yes — H18.621 is billable for FY2027. H18.621 is a valid, billable ICD-10-CM code at the highest level of specificity in its branch. H18.621 may be submitted for encounters from October 1, 2026 through September 30, 2027.
H18.621 at a glance
| Code | H18.621 |
|---|---|
| Description | Keratoconus, unstable, right eye |
| Billable | Yes |
| Code set | ICD-10-CM FY2027 |
| Valid for encounters | October 1, 2026 – September 30, 2027 |
Which MS-DRGs does H18.621 group to?
H18.621 sits in MDC 02 and helps define the logic of 2 MS-DRGs (version 44, FY2027). Which one a stay actually groups to also depends on procedures and secondary diagnoses.
- 124Other Disorders of the Eye with MCC or Thrombolytic Agentmedical
- 125Other Disorders of the Eye without MCCmedical
How is H18.621 listed in the Alphabetic Index?
The Alphabetic Index lists these routes under H18.62, the nearest indexed parent of H18.621. Use them to find the family, then select the specific code.
- Keratoconus › unstable
Excludes2 — not included here — inherited from Chapter 7
The conditions below are not part of H18.621, but a patient may have both at the same time. When documentation supports it, H18.621 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)
How long has H18.621 existed?
H18.621 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.