S30.820S Blister (nonthermal) of lower back and pelvis, sequela

ICD-10-CM S30.820S: Blister (nonthermal) of lower back and pelvis, sequela

ICD-10-CM code S30.820S identifies a nonthermal blister of the lower back and pelvis as a sequela. The official terminology record classifies this diagnosis under the broader parent code S30.820 and assigns it the semantic type of Injury or Poisoning. This reference page outlines the code's official label and structural hierarchy. 1

Plain-language overview

ICD-10-CM code S30.820S is an active diagnosis concept representing a nonthermal blister located on the lower back and pelvis, specifically captured as a sequela. 1

What this code represents

The official display label for S30.820S is Blister (nonthermal) of lower back and pelvis, sequela, and the terminology record assigns it the semantic type of Injury or Poisoning. 1

Code S30.820S is a narrower concept in the ICD-10-CM terminology, functioning as a specific child diagnosis under the parent concept S30.820, which denotes a nonthermal blister of the lower back and pelvis. 1

Coding details

The S30.820S terminology record is active for the 2026 version of ICD-10-CM, and the concept record indicates that it possesses narrower concepts within the official terminology structure. 1

Documentation considerations

The official terminology record for S30.820S provides the exact diagnosis label and identifies its parent concept as S30.820, establishing the structural hierarchy for this specific diagnosis. 1

What the sources add

While the National Cancer Institute terminology record defines the specific diagnosis S30.820S, a Centers for Disease Control report broadly categorizes lower back and pelvis injuries within national health statistics frameworks. 1 2

A Centers for Disease Control report identifies the lower back and pelvis as a distinct body region for tracking the nature of injuries, which aligns with the anatomical site specified in the S30.820S terminology record. 1 2

Coverage and utilization context

Official Medicare billing and coding articles list various nonthermal blister diagnoses, such as a blister of the flank or left lesser toe, alongside other injury diagnoses within their published coding materials. 3 4

Questions to verify

The supplied sources do not establish the specific clinical criteria that differentiate a sequela encounter from an initial or subsequent encounter for a nonthermal blister of the lower back and pelvis. 1

Sources

1. ICD-10-CM S30.820S terminology record — National Cancer Institute Enterprise Vocabulary Services; accessed 2026-07-27.
2. National Health Statistics Reports — cdc.gov; accessed 2026-07-27.
3. Article - Billing and Coding: Outpatient Occupational Therapy (A53064) — cms.gov; accessed 2026-07-27.
4. Article - Billing and Coding: Home Health Occupational Therapy (A53057) — cms.gov; accessed 2026-07-27.