2026 ICD-10-CM Diagnosis Code L89.91Pressure ulcer of unspecified site, stage 1
ICD-10-CM Codes›L00–L99›L80-L99›L89
- Billable — Valid for Submission
- Not Chronic
L89.91 is a billable ICD-10-CM diagnosis code for pressure ulcer of unspecified site, stage 1. It is valid on HIPAA claims for fiscal year 2026 (October 1, 2025 through September 30, 2026) and groups to MS-DRG 573 through 575, 592 through 594. Coders also document this condition as pressure injury stage I. In AHRQ's Clinical Classifications Software (CCSR), this diagnosis falls under Pressure ulcer of skin.
Code Identity
Code Classification
Approximate SynonymsGuidance
Alternate terms and clinical phrases that map to this code.
- Pressure injury stage I
Tabular List NotesGuidance
Coding notes and annotation back-references applicable to this code.
Inclusion Terms
- Healing pressure ulcer of unspecified site, stage 1
- Pressure pre-ulcer skin changes limited to persistent focal edema, unspecified site
These terms are the conditions for which that code is to be used. The terms may be synonyms of the code title, or, in the case of "other specified" codes, the terms are a list of the various conditions assigned to that code. The inclusion terms are not necessarily exhaustive. Additional terms found only in the Alphabetic Index may also be assigned to a code.
Clinical ClassificationClinical
AHRQ’s CCSR groups this code into broader clinical categories.
Patient EducationClinical
Pressure Sores
Pressure sores are areas of damaged skin caused by staying in one position for too long. They commonly form where your bones are close to your skin, such as your ankles, back, elbows, heels and hips. You are at risk if you are bedridden, use a wheelchair, or are unable to change your position.
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Convert L89.91 to ICD-9-CMHistory
The closest ICD-9-CM equivalents under the General Equivalence Mappings.
Code HistoryHistory
Questions About L89.91Overview
Is L89.91 (Pressure ulcer of unspecified site) a billable code?
Yes. This is a billable ICD-10-CM code, specific enough to report pressure ulcer of unspecified site, stage 1 on HIPAA-covered claims from October 1, 2025 through September 30, 2026.
What MS-DRG does L89.91 group to?
When pressure ulcer of unspecified site, stage 1 is the principal diagnosis on an inpatient stay, it groups to MS-DRG 573, 574, 575, 592, 593, 594, with relative weights from 0.8668 to 6.5514 depending on complications. Higher weights mean higher Medicare reimbursement.
What is the ICD-9 equivalent of L89.91?
Under the General Equivalence Mappings, pressure ulcer of unspecified site, stage 1 converts to ICD-9-CM 707.00 (pressure ulcer, site NOS) and 707.21 (pressure ulcer, stage I). The mapping is approximate, so confirm the match fits the documentation.
Footnotes
[1] Not chronic - A diagnosis code that does not fit the criteria for chronic condition (duration, ongoing medical treatment, and limitations) is considered not chronic. Some codes designated as not chronic are acute conditions. Other diagnosis codes that indicate a possible chronic condition, but for which the duration of the illness is not specified in the code description (i.e., we do not know the condition has lasted 12 months or longer) also are considered not chronic.
