ICD-10 · PDGM grouping
L49-L54 — Urticaria and erythema
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.
Codes in range
33
No clinical group
12
A period cannot be grouped from these.
Barred as primary
10
CMS rejects these in the primary position.
Where these codes group
21 of the 33 codes in L49-L54 group to MMTA - Other. A further 12 are assigned no clinical group at all, which means a 30-day period cannot be grouped from them.
Code families in L49-L54
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 L49-L54
Descriptions are CMS’s own, abbreviated as CMS abbreviates them.
| Code | Description | Clinical group | Primary position |
|---|---|---|---|
| L490 | Exfoliatn due to erythemat cond w < 10 pct of body surface | None | Cannot lead a claim |
| L491 | Exfoliatn due to erythemat cond w 10-19 pct of body surface | None | Cannot lead a claim |
| L492 | Exfoliatn due to erythemat cond w 20-29 pct of body surface | None | Cannot lead a claim |
| L493 | Exfoliatn due to erythemat cond w 30-39 pct of body surface | None | Cannot lead a claim |
| L494 | Exfoliatn due to erythemat cond w 40-49 pct of body surface | None | Cannot lead a claim |
| L495 | Exfoliatn due to erythemat cond w 50-59 pct of body surface | None | Cannot lead a claim |
| L496 | Exfoliatn due to erythemat cond w 60-69 pct of body surface | None | Cannot lead a claim |
| L497 | Exfoliatn due to erythemat cond w 70-79 pct of body surface | None | Cannot lead a claim |
| L498 | Exfoliatn due to erythemat cond w 80-89 pct of body surface | None | Cannot lead a claim |
| L499 | Exfoliatn d/t erythemat cond w 90 or more pct of body surfc | None | Cannot lead a claim |
| L500 | Allergic urticaria | A | Can lead a claim |
| L501 | Idiopathic urticaria | A | Can lead a claim |
| L502 | Urticaria due to cold and heat | A | Can lead a claim |
| L503 | Dermatographic urticaria | A | Can lead a claim |
| L504 | Vibratory urticaria | A | Can lead a claim |
| L505 | Cholinergic urticaria | A | Can lead a claim |
| L506 | Contact urticaria | A | Can lead a claim |
| L508 | Other urticaria | A | Can lead a claim |
| L509 | Urticaria, unspecified | A | Can lead a claim |
| L510 | Nonbullous erythema multiforme | A | Can lead a claim |
| L511 | Stevens-Johnson syndrome | A | Can lead a claim |
| L512 | Toxic epidermal necrolysis [Lyell] | A | Can lead a claim |
| L513 | Stevens-Johnson synd-tox epdrml necrolysis overlap syndrome | A | Can lead a claim |
| L518 | Other erythema multiforme | A | Can lead a claim |
| L519 | Erythema multiforme, unspecified | A | Can lead a claim |
| L52 | Erythema nodosum | A | Can lead a claim |
| L530 | Toxic erythema | A | Can lead a claim, code first applies |
| L531 | Erythema annulare centrifugum | A | Can lead a claim |
| L532 | Erythema marginatum | A | Can lead a claim |
| L533 | Other chronic figurate erythema | A | Can lead a claim |
| L538 | Other specified erythematous conditions | A | Can lead a claim |
| L539 | Erythematous condition, unspecified | None | Cannot lead a claim |
| L54 | Erythema in diseases classified elsewhere | None | Cannot 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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