R19.33 (Right lower quadrant abdominal rigidity) compared with R19.34 (Left lower quadrant abdominal rigidity), from the official CMS tabular data. R19.33 and R19.34 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. R19.33 and R19.34 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.
| R19.33Right lower quadrant abdominal rigidity | R19.34Left lower quadrant abdominal rigidity | |
|---|---|---|
| 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 | Right lower quadrant abdominal rigidity is a billable ICD-10-CM diagnosis code (R19.33). | Left lower quadrant abdominal rigidity is a billable ICD-10-CM diagnosis code (R19.34). |
Derived from the official CMS ICD-10-CM tabular data (FY2026). Not billing advice; verify sequencing rules for the encounter. All data sources