N20 — Calculus of kidney and ureter
Is N20 billable?
No — N20 is a non-billable header code. N20 groups more specific codes and cannot be submitted on a claim. A valid ICD-10-CM code must be reported at the highest level of specificity available in its branch. Select one of the 4 billable codes beneath N20.
Billable codes under this header
N20 at a glance
| Code | N20 |
|---|---|
| Description | Calculus of kidney and ureter |
| Billable | No — header code |
| Code set | ICD-10-CM FY2027 |
| Valid for encounters | October 1, 2026 – September 30, 2027 |
Excludes1 — never code together
The conditions below can never be reported together with N20 on the same claim. An Excludes1 note means the two conditions cannot occur in the same patient, so reporting both is a coding error.
Inclusion terms
Alternative wording in documentation that is classified to N20.
- Calculous pyelonephritis
Excludes2 — not included here — inherited from Chapter 14
The conditions below are not part of N20, but a patient may have both at the same time. When documentation supports it, N20 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)
What codes fall under N20? (4)
How long has N20 existed?
N20 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.
Which codes are confused with N20?
ICD-10-CM declares these codes mutually exclusive with N20 — exactly one of each pair can be correct for a given encounter.