2026 ICD-10-CM Diagnosis Code S45.801SUnspecified injury of other specified blood vessels at shoulder and upper arm level, right arm, sequela
S45.801S is a billable ICD-10-CM diagnosis code for unspecified injury of other specified blood vessels at shoulder and upper arm level, right arm, sequela. The 7th character S marks it as a sequela code, which reports a problem that remains after the original condition has resolved. It is valid on HIPAA claims for fiscal year 2026 (October 1, 2025 through September 30, 2026) and groups to MS-DRG 299 through 301. The code is exempt from POA reporting. In AHRQ's Clinical Classifications Software (CCSR), this diagnosis falls under Injury, sequela.
Code Identity
Code Classification
Present on Admission (POA)Billing
S45.801S is exempt from POA reporting on inpatient claims to general acute care hospitals. Review other POA exempt codes.
Coding GuidelinesGuidance
The appropriate 7th character is to be added to each code from block Injury of blood vessels at shoulder and upper arm level (S45). Use the following options for the applicable episode of care:
- A - initial encounter
- D - subsequent encounter
- S - sequela
Source: ICD-10-CM Official Guidelines for Coding and Reporting, FY 2026, published by CMS and the National Center for Health Statistics.
Clinical ClassificationClinical
AHRQ’s CCSR groups this code into broader clinical categories.
Patient EducationClinical
Arm Injuries and Disorders
Of the 206 bones in your body, three of them are in your arm: the humerus, radius, and ulna. Your arms are also made up of muscles, joints, tendons, and other connective tissue. Injuries to any of these parts of the arm can occur during sports, a fall, or an accident.
Read the full article at MedlinePlus
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Convert S45.801S to ICD-9-CMHistory
The closest ICD-9-CM equivalents under the General Equivalence Mappings.
Code HistoryHistory
Questions About S45.801SOverview
Is S45.801S a billable code?
Yes. This is a billable ICD-10-CM code, specific enough to report unspecified injury of other specified blood vessels at shoulder and upper arm level, right arm, sequela on HIPAA-covered claims from October 1, 2025 through September 30, 2026.
What does the 7th character S in S45.801S mean?
The final character S makes this a sequela code: it reports a lingering problem that remains after the unspecified injury of other specified blood vessels at shoulder and upper arm level, right arm itself has resolved, not the original event.
What MS-DRG does S45.801S group to?
When unspecified injury of other specified blood vessels at shoulder and upper arm level, right arm, sequela is the principal diagnosis on an inpatient stay, it groups to MS-DRG 299, 300, 301, with relative weights from 0.7197 to 1.6327 depending on complications. Higher weights mean higher Medicare reimbursement.
Is S45.801S exempt from POA reporting?
Yes. CMS lists this code among those exempt from present on admission reporting, so hospitals do not assign a POA indicator for unspecified injury of other specified blood vessels at shoulder and upper arm level, right arm, sequela on inpatient claims.
What is the ICD-9 equivalent of S45.801S?
Under the General Equivalence Mappings, unspecified injury of other specified blood vessels at shoulder and upper arm level, right arm, sequela converts to ICD-9-CM 908.3 (late eff inj periph vess). 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.
