October 1 update. Our PDGM and ICD-10 tools now use the FY2027 code set: 190 codes added, 30 deleted, and no existing code changed clinical group.

See what changed

ICD-10 · PDGM grouping

X52-X58 — Accidental exposure to other specified factors

Every ICD-10-CM code in this range and the PDGM clinical group CMS assigns to it, read from the CMS grouper crosswalk v07.2.26.

ICD-10-CM FY2027 · CMS grouper v07.2.26

Codes in range

6

No clinical group

6

A period cannot be grouped from these.

Barred as primary

0

CMS rejects these in the primary position.

Where these codes group

None of the 6 codes in X52-X58 is assigned a PDGM clinical group. A 30-day period cannot be grouped from any of them, so none can hold the primary position on a home health claim.

Code families in X52-X58

One page per three-character family: every code in it, whether it can lead a claim, its clinical group and comorbidity subgroup.

Every code in X52-X58

Descriptions are CMS’s own, abbreviated as CMS abbreviates them.

CodeDescriptionClinical groupPrimary position
X52XXXAProlonged stay in weightless environment, initial encounterNoneCannot lead a claim
X52XXXDProlonged stay in weightless environment, subs encntrNoneCannot lead a claim
X52XXXSProlonged stay in weightless environment, sequelaNoneCannot lead a claim
X58XXXAExposure to other specified factors, initial encounterNoneCannot lead a claim
X58XXXDExposure to other specified factors, subsequent encounterNoneCannot lead a claim
X58XXXSExposure to other specified factors, sequelaNoneCannot lead a claim

Source: CMS HH PPS Grouper Software v07.2.26, effective 2026-10-01. This is the crosswalk Medicare runs a claim through. Grouping also depends on admission source, timing, the OASIS functional items and the rest of the diagnosis list.

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