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 v07.1.26.
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.
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 | Not accepted |
| L491 | Exfoliatn due to erythemat cond w 10-19 pct of body surface | None | Not accepted |
| L492 | Exfoliatn due to erythemat cond w 20-29 pct of body surface | None | Not accepted |
| L493 | Exfoliatn due to erythemat cond w 30-39 pct of body surface | None | Not accepted |
| L494 | Exfoliatn due to erythemat cond w 40-49 pct of body surface | None | Not accepted |
| L495 | Exfoliatn due to erythemat cond w 50-59 pct of body surface | None | Not accepted |
| L496 | Exfoliatn due to erythemat cond w 60-69 pct of body surface | None | Not accepted |
| L497 | Exfoliatn due to erythemat cond w 70-79 pct of body surface | None | Not accepted |
| L498 | Exfoliatn due to erythemat cond w 80-89 pct of body surface | None | Not accepted |
| L499 | Exfoliatn d/t erythemat cond w 90 or more pct of body surfc | None | Not accepted |
| L500 | Allergic urticaria | A | Accepted |
| L501 | Idiopathic urticaria | A | Accepted |
| L502 | Urticaria due to cold and heat | A | Accepted |
| L503 | Dermatographic urticaria | A | Accepted |
| L504 | Vibratory urticaria | A | Accepted |
| L505 | Cholinergic urticaria | A | Accepted |
| L506 | Contact urticaria | A | Accepted |
| L508 | Other urticaria | A | Accepted |
| L509 | Urticaria, unspecified | A | Accepted |
| L510 | Nonbullous erythema multiforme | A | Accepted |
| L511 | Stevens-Johnson syndrome | A | Accepted |
| L512 | Toxic epidermal necrolysis [Lyell] | A | Accepted |
| L513 | Stevens-Johnson synd-tox epdrml necrolysis overlap syndrome | A | Accepted |
| L518 | Other erythema multiforme | A | Accepted |
| L519 | Erythema multiforme, unspecified | A | Accepted |
| L52 | Erythema nodosum | A | Accepted |
| L530 | Toxic erythema | A | Accepted |
| L531 | Erythema annulare centrifugum | A | Accepted |
| L532 | Erythema marginatum | A | Accepted |
| L533 | Other chronic figurate erythema | A | Accepted |
| L538 | Other specified erythematous conditions | A | Accepted |
| L539 | Erythematous condition, unspecified | None | Cannot group |
| L54 | Erythema in diseases classified elsewhere | None | Cannot group |
Source: CMS HH PPS Grouper Software v07.1.26, effective 2026-04-01. 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.
The monthly home health regs digest
What CMS changed, what's due next, and what to do about it — one email a month, no fluff.