R92.331 (Mammographic heterogeneous density, right breast) compared with R92.332 (Mammographic heterogeneous density, left breast), from the official CMS tabular data. R92.331 and R92.332 code the same condition on opposite sides.
Same condition; these differ only in which side is documented.
These codes share a category and title and differ only in the side affected. The documentation decides which applies, and a bilateral code is reported only where the code set provides one.
Source: ICD-10-CM tabular list (laterality variant derived from the code title)
Same condition, opposite side. R92.331 and R92.332 name the same condition on opposite sides of the body.
Same category and title, differing only in which side is affected — the documentation decides which one applies, and a bilateral code is reported only where the code set provides one.
| R92.331Mammographic heterogeneous density, right breast | R92.332Mammographic heterogeneous density, left breast | |
|---|---|---|
| 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 | Mammographic heterogeneous density, right breast is a billable ICD-10-CM diagnosis code (R92.331). | Mammographic heterogeneous density, left breast is a billable ICD-10-CM diagnosis code (R92.332). |
| Includes | nonspecific abnormal findings on diagnostic imaging by computerized axial tomography [CAT scan] nonspecific abnormal findings on diagnostic imaging by magnetic resonance imaging [MRI][NMR] nonspecific abnormal findings on diagnostic imaging by positron emission tomography [PET scan] nonspecific abnormal findings on diagnostic imaging by thermography | nonspecific abnormal findings on diagnostic imaging by computerized axial tomography [CAT scan] nonspecific abnormal findings on diagnostic imaging by magnetic resonance imaging [MRI][NMR] nonspecific abnormal findings on diagnostic imaging by positron emission tomography [PET scan] nonspecific abnormal findings on diagnostic imaging by thermography |
Derived from the official CMS ICD-10-CM tabular data (FY2026). Not billing advice; verify sequencing rules for the encounter. All data sources