N21.9
Calculus of lower urinary tract, unspecified
BillableComplete code, valid to report
N21.9 (also written N219) is a billable ICD-10-CM diagnosis code for calculus of lower urinary tract, unspecified. It is part of the FY2027 code set, effective October 1, 2026. It is one of the 4 codes in category N21 (Calculus of lower urinary tract). The Alphabetic Index lists it under 2 entries. Its coding notes include 1 Excludes1 entry and 8 Excludes2 entries.
Excludes1
Not coded here. The listed conditions generally should not be reported together.
This code
- calculus of urinary tract NOS (N20.9)
Excludes2
Not included here. Both codes may be reported if the patient has both conditions.
Also from chapter/block level (8 notes)
Inherited from Chapter 14 Diseases of the genitourinary system
- 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)
Includes
Further defines or gives examples of the content of the category.
Inherited from N21 Calculus of lower urinary tract
- calculus of lower urinary tract with cystitis and urethritis
Alphabetic Index terms
Terms the official Alphabetic Index lists for this code. 2 entries