R82.1 vs R82.91
R82.1 (Myoglobinuria) compared with R82.91 (Other chromoabnormalities of urine), from the official CMS tabular data. Do not report these codes together: the official tabular list marks them Excludes1.
Can these codes be reported together?
No — do not report together. R82.91 carries an Excludes1 note covering R82.1: “myoglobinuria (R82.1)”
Sole exception: when the two conditions are documented as unrelated to each other (ICD-10-CM Official Guidelines, Section I.A.12.a).
Side by side
| R82.1Myoglobinuria | R82.91Other chromoabnormalities of urine | |
|---|---|---|
| Billing status | Billable | Billable |
| Classification | R00-R99 — Symptoms, Signs and Abnormal Clinical and Laboratory Findings, Not Elsewhere Classified (R00-R99) | R00-R99 — Symptoms, Signs and Abnormal Clinical and Laboratory Findings, Not Elsewhere Classified (R00-R99) |
| Definition | Myoglobinuria is a billable ICD-10-CM diagnosis code (R82.1). | Other chromoabnormalities of urine is a billable ICD-10-CM diagnosis code (R82.91). |
| Includes | chromoabnormalities in urine | chromoabnormalities in urine Chromoconversion (dipstick) Idiopathic dipstick converts positive for blood with no cellular forms in sediment |
| Use additional code | code to identify any retained foreign body, if applicable (Z18.-) | code to identify any retained foreign body, if applicable (Z18.-) |
Derived from the official CMS ICD-10-CM tabular data (FY2026). Not billing advice; verify sequencing rules for the encounter. All data sources