Bullous Pemphigoid Is L12.0, Not L10.0. Both Still Map to HCC 387

L12.0 is bullous pemphigoid. L10.0 is pemphigus vulgaris. Both map to HCC 387. The leftover search pairs bullous pemphigoid with L10.0. That pairing is the miss.

Open the live L12.0 and L10.0 cards before you invent a second 387 or a V24 row. This page is the desk table for that leftover. It is not a rewrite of the E11.65 desk. It is not a SNF CB, CLFS, or G0685 story.

*Current as of August 27, 2026. V28 mapping and CNA factors come from the live code pages named below and the 2026 Final ICD-10-CM Mappings. Payment year 2026 is 100% V28. Look the exact codes up. Do not code from this recap. Do not invent a V24 map.*

Quick answer

No. Bullous pemphigoid is L12.0, not L10.0. L10.0 is pemphigus vulgaris. On the live cards both map to CMS-HCC V28 HCC 387, Pemphigus, Pemphigoid, and Other Specified Autoimmune Skin Disorders. The source-labeled community non-dual aged reference coefficient is 0.406. V24 is not mapped.

Reporting both L12.0 and L10.0 does not open a second 387.

One bucket. 14 codes.

The live HCC 387 card lists 14 ICD-10-CM codes in one bucket. L12.0 and L10.0 sit in that same bucket. Two codes on the encounter still pay 387 once. Do not stack 387.

Do not invent a V24 map

The live L12.0 and L10.0 cards show no V24 mapping. Do not back-fill a V24 HCC.

L12.2, L12.3, and L10.5 are not 387

L12.2 is billable. It is not in the PY2026 V28 map file. Do not invent a 387 row.

L12.3 is a header. It is not billable. The children are L12.30, L12.31, and L12.35. Look the exact child card up. Do not assume 387 from the header.

L10.5 is also unmapped in V28.

How the cards distinguish the two

The leftover is the code, not the dollar. When the record uses these findings, the live cards keep them apart:

Do not pick L12.0 or L10.0 from a problem-list row. Assign the code the provider assessed.

MEAT this year

Mapped codes still need monitoring, evaluation, assessment, or treatment this visit. A problem-list row from last year is not enough. See MEAT criteria and problem lists do not validate HCCs. MEAT is the training mnemonic. The authorities are the Official Guidelines and the record from the date of service.

Common misses

1. Coding bullous pemphigoid as L10.0. L12.0 is bullous pemphigoid. L10.0 is pemphigus vulgaris.

2. Stacking two 387s. Both codes sit in one bucket. 387 pays once.

3. Inventing a V24 map. The live L12.0 and L10.0 cards show V24 not mapped.

4. Treating L12.3 as 387. L12.3 is a header. Look the child card up.

5. Assigning 387 to L12.2 or L10.5. Neither is in the PY2026 V28 map file.

Two-minute check

1. Name the condition the provider assessed today: bullous pemphigoid or pemphigus vulgaris.

2. Assign L12.0 or L10.0 from that assessment. Do not swap them.

3. Look that exact code up on HCC Buddy or in the encoder. Expect HCC 387, CNA 0.406.

4. If both codes are supported, they still pay 387 once. Do not stack 387.

5. Confirm MEAT this visit. Do not invent a V24 map. Do not assume 387 on L12.3.

Related

Disclaimer

This article is for professional and educational use only. It is not coding, billing, legal, or medical advice. Verify every code, HCC map, and guideline section against current official CMS and ICD-10-CM guidance and your payer's policy before you assign it. Reading it creates no provider, patient, or advisory relationship.

By the HCC Buddy Coding Team. V28 mappings and CNA factors from the cited live code pages (CMS-HCC V28 PY2026 model software and ICD-10-CM mapping file). Not medical advice. Not a SNF CB, CLFS, G0685, or V44 story. Not a rewrite of the E11.65 leftover.

Sources

L12.0 (V28 HCC 387 CNA 0.406; live card shows no V24 mapping)

L10.0 (V28 HCC 387 CNA 0.406; live card shows no V24 mapping)

L12.1 · L12.8 · L12.9 (V28 HCC 387)

L12.2 (not in the PY2026 V28 map file)

L12.3 (header / not billable; children L12.30, L12.31, L12.35)

L10.5 (unmapped in V28)

HCC 387 (14 codes; CNA 0.406)

CMS 2026 Model Software / Final ICD-10-CM Mappings