2026 ICD-10-CM Diagnosis Code S46.012SStrain of muscle(s) and tendon(s) of the rotator cuff of left shoulder, sequela

ICD-10-CM Codes›S00–T88›S40-S49›S46

ICD-10-CM S46.012S
CMSSource: CMS FY 2026 ICD-10-CM dataset · Effective Oct 1, 2025 – Sep 30, 2026

S46.012S is a billable ICD-10-CM diagnosis code for strain of muscle(s) and tendon(s) of the rotator cuff of left shoulder, 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 562 through 563. The code is exempt from POA reporting. In AHRQ's Clinical Classifications Software (CCSR), this diagnosis falls under Injury, sequela.

Code Identity

ICD-10-CM Code
S46.012S
Billable Status
Yes — Valid for Submission
Code Describes
Strain of muscle(s) and tendon(s) of the rotator cuff of left shoulder, sequela
Short Description
Strain of musc/tend the rotator cuff of l shoulder, sequela
Parent Code
S46.012
Strain of muscle(s) and tendon(s) of the rotator cuff of left shoulder

Code Classification

ChapterS00–T88Injury, poisoning and certain other consequences of external causes
SectionS40-S49Injuries to the shoulder and upper arm
CategoryS46Injury of muscle, fascia and tendon at shoulder and upper arm level
This CodeS46.012SStrain of muscle(s) and tendon(s) of the rotator cuff of left shoulder, sequela

Present on Admission (POA)Billing

S46.012S is exempt from POA reporting on inpatient claims to general acute care hospitals. Review other POA exempt codes.

Approximate SynonymsGuidance

Alternate terms and clinical phrases that map to this code.

  • Bilateral rotator cuff tear
  • Injury of muscle of rotator cuff
  • Left infraspinatus strain
  • Left rotator cuff strain
  • Partial thickness rotator cuff tear
  • Rupture of infraspinatus tendon
  • Rupture of tendon of left shoulder
  • Rupture subscapularis tendon
  • Shoulder strain
  • Strain of infraspinatus muscle AND/OR tendon
  • Strain of left subscapularis muscle and/or tendon
  • Strain of left supraspinatus muscle
  • Strain of left supraspinatus muscle and/or tendon
  • Strain of subscapularis muscle
  • Strain of subscapularis muscle and/or tendon
  • Strain of subscapularis muscle of left shoulder
  • Strain of subscapularis tendon
  • Strain of supraspinatus muscle
  • Strain of supraspinatus muscle AND/OR tendon
  • Strain of tendon of left shoulder region
  • Strain of tendon of left upper limb
  • Strain of tendon of subscapularis muscle of left shoulder
  • Supraspinatus tear
  • Traumatic left rotator cuff tear
  • Traumatic partial rupture of rotator cuff of left shoulder
  • Traumatic right rotator cuff tear
  • Traumatic tear of left infraspinatus tendon
  • Traumatic tear of left supraspinatus tendon
  • Traumatic tear of tendon of infraspinatus muscle
  • Traumatic tear of tendon of left shoulder
  • Traumatic tear of tendon of subscapularis muscle of left shoulder
  • Traumatic tear of tendon of subscapularis muscle of shoulder
  • Traumatic tear of tendon of supraspinatus muscle

Coding GuidelinesGuidance

The appropriate 7th character is to be added to each code from block Injury of muscle, fascia and tendon at shoulder and upper arm level (S46). 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.

CCSR INJ073
Injury, sequela
Default principal diagnosis: inpatient Yes · outpatient Yes

Patient EducationClinical

Rotator Cuff Injuries

Your rotator cuff is part of your shoulder joint. It's a group of muscles and tendons that holds the top part of your upper arm bone firmly in your shoulder socket. The rotator cuff keeps your shoulder stable when you move your arm in any direction.

The full article covers:

  • What is a rotator cuff?
  • What are rotator cuff injuries?
  • Who is more likely to develop a rotator cuff injury?
  • What are the symptoms of rotator cuff injuries?
  • How are rotator cuff injuries diagnosed?
  • What are the treatments for rotator cuff injuries?
  • When should I see a health care provider for shoulder pain?

Read the full article at MedlinePlus

Courtesy of MedlinePlus, a service of the U.S. National Library of Medicine.

Convert S46.012S to ICD-9-CMHistory

The closest ICD-9-CM equivalents under the General Equivalence Mappings.

ICD-9-CM
905.7 Late effec sprain/strain
Approximate The match is approximate rather than exact.

Code HistoryHistory

FY 2016AddedAdded to the ICD-10-CM code setEffective October 1, 2015, the first year of ICD-10-CM.
FY 2017–2025No changes
FY 2026CurrentCurrent code set, no changesEffective October 1, 2025 through September 30, 2026.

Questions About S46.012SOverview

Is S46.012S a billable code?

Yes. This is a billable ICD-10-CM code, specific enough to report strain of muscle(s) and tendon(s) of the rotator cuff of left shoulder, sequela on HIPAA-covered claims from October 1, 2025 through September 30, 2026.

What does the 7th character S in S46.012S mean?

The final character S makes this a sequela code: it reports a lingering problem that remains after the strain of muscle(s) and tendon(s) of the rotator cuff of left shoulder itself has resolved, not the original event.

What MS-DRG does S46.012S group to?

When strain of muscle(s) and tendon(s) of the rotator cuff of left shoulder, sequela is the principal diagnosis on an inpatient stay, it groups to MS-DRG 562, 563, with relative weights from 0.8955 to 1.4248 depending on complications. Higher weights mean higher Medicare reimbursement.

Is S46.012S 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 strain of muscle(s) and tendon(s) of the rotator cuff of left shoulder, sequela on inpatient claims.

What is the ICD-9 equivalent of S46.012S?

Under the General Equivalence Mappings, strain of muscle(s) and tendon(s) of the rotator cuff of left shoulder, sequela converts to ICD-9-CM 905.7 (late effec sprain/strain). 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.