2026 ICD-10-CM Diagnosis Code S37.491DOther injury of ovary, unilateral, subsequent encounter
S37.491D is a billable ICD-10-CM diagnosis code for other injury of ovary, unilateral, subsequent encounter. The 7th character D marks it as a subsequent encounter code, used during routine care in the healing or recovery phase. It is valid on HIPAA claims for fiscal year 2026 (October 1, 2025 through September 30, 2026) and groups to MS-DRG 949 through 950. The code is exempt from POA reporting. In AHRQ's Clinical Classifications Software (CCSR), this diagnosis falls under Internal organ injury, subsequent encounter.
Code Identity
Code Classification
Present on Admission (POA)Billing
S37.491D 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 urinary and pelvic organs (S37). 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
Ovarian Disorders
The ovaries are a pair of female reproductive glands that make eggs and female hormones. Women have one ovary on each side of the uterus (where a fetus grows during pregnancy). Each ovary is about the size and shape of an almond.
The full article covers:
- What are ovaries?
- What are the types of ovarian disorders?
- What causes ovarian disorders?
- What are the symptoms of ovarian disorders?
- How are ovarian disorders diagnosed?
- What are the treatments for ovarian disorders?
Read the full article at MedlinePlus
Courtesy of MedlinePlus, a service of the U.S. National Library of Medicine.
Convert S37.491D to ICD-9-CMHistory
The closest ICD-9-CM equivalents under the General Equivalence Mappings.
Code HistoryHistory
Questions About S37.491DOverview
Is S37.491D (Other injury of ovary, unilateral) a billable code?
Yes. This is a billable ICD-10-CM code, specific enough to report other injury of ovary, unilateral, subsequent encounter on HIPAA-covered claims from October 1, 2025 through September 30, 2026.
What does the 7th character D in S37.491D mean?
The final character D marks a subsequent encounter: use it for routine care while the other injury of ovary, unilateral is healing, after active treatment has ended.
What MS-DRG does S37.491D group to?
When other injury of ovary, unilateral, subsequent encounter is the principal diagnosis on an inpatient stay, it groups to MS-DRG 949, 950, with relative weights from 0.6277 to 1.1897 depending on complications. Higher weights mean higher Medicare reimbursement.
Is S37.491D 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 other injury of ovary, unilateral, subsequent encounter on inpatient claims.
What is the ICD-9 equivalent of S37.491D?
Under the General Equivalence Mappings, other injury of ovary, unilateral, subsequent encounter converts to ICD-9-CM V58.89 (other specfied aftercare). 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.
