N22 — Calculus of urinary tract in diseases classified elsewhere
Is N22 billable?
Yes — N22 is billable for FY2027. N22 is a valid, billable ICD-10-CM code at the highest level of specificity in its branch. N22 may be submitted for encounters from October 1, 2026 through September 30, 2027.
N22 at a glance
| Code | N22 |
|---|---|
| Description | Calculus of urinary tract in diseases classified elsewhere |
| Billable | Yes |
| Code set | ICD-10-CM FY2027 |
| Valid for encounters | October 1, 2026 – September 30, 2027 |
What Medicare edits apply to N22?
The Medicare Code Editor screens inpatient claims before they are grouped. These edits name N22 directly.
This code describes a manifestation of an underlying disease. The underlying condition must be sequenced before it, so it can never be the principal or first-listed diagnosis.
Which MS-DRGs does N22 group to?
N22 sits in MDC 11 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.
- 693Urinary Stones with MCCmedical
- 694Urinary Stones without MCCmedical
How is N22 listed in the Alphabetic Index?
These are the routes through the Alphabetic Index that lead to N22. They show the wording a clinician may have documented, which often differs from the Tabular description.
- Calculus, calculi, calculous › xanthine
- Stone › xanthine (s)
Code first
The underlying condition below must be sequenced before N22. N22 describes a manifestation and cannot be the principal or first-listed diagnosis.
Excludes2 — not included here — inherited from Chapter 14
The conditions below are not part of N22, but a patient may have both at the same time. When documentation supports it, N22 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)
- endocrine, nutritional and metabolic diseases (E00-E88)
- 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)
How long has N22 existed?
N22 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.