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ICD-10-CM 2027 diagnosis code

L98.443Non-pressure chronic ulcer of chest with necrosis of muscle

✓ Billable / specificCC — complication/comorbidity

L98.443 is a valid, billable ICD-10-CM code for non-pressure chronic ulcer of chest with necrosis of muscle. It can be reported on claims for dates of service from October 1, 2026 – September 30, 2027.

Code last changed in FY2026 (effective October 1, 2025). Source: official FY2027 ICD-10-CM release from CDC/NCHS and CMS. Page updated September 29, 2026. About our data

About L98.443

L98.443 is the ICD-10-CM diagnosis code for Non-pressure chronic ulcer of chest with necrosis of muscle. It belongs to category L98 (other disorders of skin and subcutaneous tissue, not elsewhere classified), block L80-L99 (other disorders of the skin and subcutaneous tissue) and chapter 12 (diseases of the skin and subcutaneous tissue). It is billable, so it can be reported on its own for dates of service from October 1, 2026 through September 30, 2027.

Within L98.44 (Non-pressure chronic ulcer of chest), L98.443 is specifically for Non-pressure chronic ulcer of chest with necrosis of muscle. Related codes cover limited to breakdown of skin (L98.441), with fat layer exposed (L98.442), with necrosis of bone (L98.444), with muscle involvement without evidence of necrosis (L98.445), with bone involvement without evidence of necrosis (L98.446), with other specified severity (L98.448) and with unspecified severity (L98.449).

As a secondary diagnosis it is a CC (complication or comorbidity), which can move an inpatient stay into the "with CC" MS-DRG of its family, unless the principal diagnosis excludes it.

In MS-DRG v44.0, it is part of the grouping logic for DRG 573 (Skin Graft for Skin Ulcer or Cellulitis with MCC, relative weight 6.3575), DRG 574 (Skin Graft for Skin Ulcer or Cellulitis with CC, relative weight 3.5674), DRG 575 (Skin Graft for Skin Ulcer or Cellulitis without CC/MCC, relative weight 1.8797), DRG 592 (Skin Ulcers with MCC, relative weight 1.9101), DRG 593 (Skin Ulcers with CC, relative weight 1.1575) and DRG 594 (Skin Ulcers without CC/MCC, relative weight 0.7801), in MDC 09 (Diseases and Disorders of the Skin, Subcutaneous Tissue and Breast), as a principal or secondary diagnosis. The DRG a claim lands in depends on the principal diagnosis, procedures and any CC/MCC secondary diagnoses.

It was added in FY2026, effective October 1, 2025.

Notes that apply from higher levels

Instructions written at a parent level also apply to L98.443.

› From L98.4 Non-pressure chronic ulcer of skin, not elsewhere classified
Excludes2
  • pressure ulcer (pressure area) (L89.-)
  • gangrene (I96)
  • skin infections (L00-L08)
  • specific infections classified to A00-B99
  • ulcer of lower limb NEC (L97.-)
  • varicose ulcer (I83.0-I83.93)

Broader instructions also apply from Chapter 12: Diseases of the skin and subcutaneous tissue.

Alphabetic index entries

1 entries

Terms in the official ICD-10-CM index that lead to L98.443.

MS-DRG v44.0 grouping

All DRGs →

Inpatient MS-DRGs this diagnosis can group to, as the principal or a secondary diagnosis, depending on the rest of the claim.

MDC 09 · Diseases and Disorders of the Skin, Subcutaneous Tissue and Breast

Code history

  1. 2016
  2. 2017
  3. 2018
  4. 2019
  5. 2020
  6. 2021
  7. 2022
  8. 2023
  9. 2024
  10. 2025
  11. 2026
  12. 2027
  • FY2026 (effective 10/1/2025): Added
  • No changes since FY2026.

Common questions about L98.443

Is L98.443 billable?

Yes. L98.443 is a billable/specific ICD-10-CM code valid for FY2027 (October 1, 2026 – September 30, 2027).

Can L98.443 be used as a principal diagnosis?

Yes. The Medicare Code Editor doesn't restrict L98.443 as a principal diagnosis.

Is L98.443 a CC or MCC?

L98.443 is a CC (complication or comorbidity) under MS-DRG v44.0, unless excluded by the principal diagnosis.

What DRG does L98.443 group to?

L98.443 is used in the MS-DRG v44.0 logic for MS-DRG 573 (Skin Graft for Skin Ulcer or Cellulitis with MCC), MS-DRG 574 (Skin Graft for Skin Ulcer or Cellulitis with CC), MS-DRG 575 (Skin Graft for Skin Ulcer or Cellulitis without CC/MCC), MS-DRG 592 (Skin Ulcers with MCC), MS-DRG 593 (Skin Ulcers with CC) and MS-DRG 594 (Skin Ulcers without CC/MCC). Which one applies depends on whether it is the principal diagnosis and on the rest of the claim.