ICD code S43.001D – Right shoulder subluxation, subsequent encounter

Key takeaways

S43.001D is a billable ICD-10-CM code for unspecified subluxation of the right shoulder joint at the subsequent encounter, valid from FY2016 through FY2027.

The seventh character D means the patient is getting routine care in the healing phase, whatever the visit number.

Billing S43.001A (initial encounter) on a follow-up visit is a frequent denial cause, so match the seventh character to the documented treatment phase.

Strain codes in S46.- are an Excludes2 note for S43, so you can report both when the patient has both conditions.

Pabau’s practice software lets you customize SOAP note templates, so every follow-up note asks for laterality and the treatment phase.

ICD-10 code S43.001D: Definition and code details

ICD-10 code S43.001D is a valid, billable ICD-10-CM diagnosis code for unspecified subluxation of the right shoulder joint, subsequent encounter. Orthopedic, sports medicine and physical therapy clinicians use it for follow-up visits once active treatment of a right glenohumeral subluxation has ended.

Verify the current year’s descriptor against the CDC/NCHS ICD-10-CM web tool, which publishes official tabular list updates each October for the following fiscal year.

What the seventh character D means on S43.001D

The seventh character D designates subsequent encounter. The patient is receiving routine care during the healing phase, after active treatment has ended. That care includes physical therapy, manipulation, follow-up imaging and monitoring.

D tracks the treatment phase, so the visit count never decides it. A patient at their second appointment is still at the initial encounter if active treatment is ongoing.

The ICD-10-CM Official Guidelines for Coding and Reporting (Section I.C.19.a) tie “subsequent” to the phase of treatment rather than the visit count. The treating clinician’s note must clearly indicate that the active-treatment episode has concluded and the patient is now in a healing or rehabilitative phase.

Anatomical scope: What “unspecified subluxation of right shoulder joint” covers

Subluxation is a partial displacement of a joint’s articular surfaces. The humeral head shifts out of its normal position in the glenoid fossa but keeps partial contact. Dislocation is a complete loss of joint contact. S43.001D covers subluxation only, and dislocation has its own 6th-character codes, e.g. S43.004, S43.014, S43.024.

The “unspecified” qualifier means the direction or type of subluxation is not documented: Anterior, posterior, inferior, or multidirectional. Use this code only when the provider’s note does not record subluxation direction. If the note hints at a direction, such as anterior glenohumeral subluxation, query the provider before defaulting to “unspecified.”

• Joint covered: Glenohumeral joint (right shoulder) – the ball-and-socket articulation between the humeral head and the glenoid fossa of the scapula
• Laterality: Right side only – the “1” in S43.001 specifies right. Left shoulder subluxation maps to S43.002x; laterality unspecified maps to S43.003x
• Type covered: Unspecified subluxation – partial displacement, direction not documented
• NOT covered: Complete dislocation, which has its own 6th-character codes (e.g. S43.004, S43.014, S43.024), acromioclavicular joint injuries (S43.1-) and sternoclavicular joint injuries (S43.2-)

S43.001D in the ICD-10-CM hierarchy

Understanding where S43.001D sits in the code tree helps coders navigate to adjacent codes quickly and avoid selecting a parent subcategory that is non-billable. The full path from chapter to code is shown below.

The CMS ICD-10 codes page publishes the annual tabular list update files each October. Always confirm that the code remains active for the date of service you are billing.

Includes and Excludes2 notes for S43.001D

The S43 category carries an Includes note and an Excludes2 note. Review both before you submit, because they decide which other injury codes can share the claim.

Includes notes for S43

• Avulsion of joint or ligament of shoulder girdle
• Laceration of cartilage, joint or ligament of shoulder girdle
• Sprain of cartilage, joint or ligament of shoulder girdle
• Traumatic hemarthrosis of joint or ligament of shoulder girdle
• Traumatic rupture of joint or ligament of shoulder girdle
• Traumatic subluxation of joint or ligament of shoulder girdle
• Traumatic tear of joint or ligament of shoulder girdle

Excludes2 note for S43 (code separately if applicable)

• Strain of muscle, fascia and tendon of shoulder and upper arm (S46.-)

S46.- is an Excludes2 note, so S43.001D and an S46.- code may be reported together when both conditions exist. Excludes2 means the strain is not part of S43, but a patient can have both injuries at once.

Commonly confused codes and how to choose the right one

S43.001D sits within a tight cluster of similar codes. The decision path and table below cover the three most frequent sources of confusion: Encounter type, laterality, and subluxation versus dislocation.

If the follow-up note documents a complete anterior dislocation of the right humerus, the correct code is S43.014D instead.

If the note specifies an inferior direction and the encounter treats a late effect of the original subluxation, report S43.031S.

Refer to the AAPC ICD-10-CM code lookup to view the full S43 family and cross-reference related codes when documentation is ambiguous.

Documentation requirements for S43.001D subsequent encounter coding

A claim submitted with S43.001D is supportable only when the clinical note contains all four of the following elements. Missing any one is grounds for a medical necessity denial.

1. Confirmed right shoulder subluxation diagnosis: The note must state a diagnosis of subluxation of the right shoulder – not dislocation, strain, or sprain. If the original injury was diagnosed elsewhere, include the prior record in the clinical file.
2. Right-side laterality: “Right” must appear explicitly. “Shoulder subluxation” without laterality forces S43.003D (unspecified side), which is a weaker claim and may attract additional scrutiny from some payers.
3. Subsequent encounter justification: The note must document that active treatment has concluded and the current visit is for routine care, rehabilitation, or monitoring. Language such as “patient presents for follow-up PT following initial reduction on [date]” directly supports the seventh character D.
4. Unspecified subluxation acknowledgement: If no direction is documented, the note should not attempt to specify one. “Unspecified” is appropriate precisely because the type is not documented – do not code to a more specific subcategory without provider documentation to support it.

Payer requirements and prior authorization

S43.001D is a billable ICD-10-CM code for Medicare, Medicaid, and commercial payers. Coverage and prior authorization rules still vary by plan. Submit through a clearinghouse that validates your claim against active payer edits before transmission.

Pabau, the practice management system we build, integrates with Claim.MD’s clearinghouse to route claims to thousands of US payers. Edit failures are caught there, before they reach the payer and turn into a denial.

Commonly paired CPT codes

• 97110 – Therapeutic exercises (PT sessions for shoulder rehabilitation)
• 97530 – Therapeutic activities (functional movement training)
• 97012 – Mechanical traction for shoulder
• 29240 – Strapping, shoulder
• 73030 – X-ray, shoulder, minimum two views (follow-up imaging)

Therapeutic exercise under 97110 is billed in 15-minute units. Record the minutes spent in the same note that supports the S43.001D diagnosis.

Prior authorization tips

Many commercial plans require prior authorization for ongoing PT beyond a set number of visits. When requesting authorization, document both the subluxation diagnosis and the functional limitations that justify continued rehabilitation. Real-time insurance eligibility verification before each PT visit confirms active coverage and any remaining authorized visits. That check lowers the risk of billing into an exhausted benefit.

Common claim denial reasons for S43.001D and how to avoid them

Denials on ICD-10 code S43.001D follow predictable patterns. Knowing them before submission is more efficient than working appeals after the fact. Effective denial management in healthcare starts with pre-submission validation rather than retrospective correction.

Submitting a clean claim for S43.001D means validating all five elements above before transmission. Those are the seventh character, the complete code, matching laterality, medical necessity documentation and active authorization. If a payer still rejects the claim, our guide to denial codes explains how to respond.

How Pabau supports S43.001D documentation and claims

Many practices write shoulder follow-up notes as free text and leave the coder to infer side and treatment phase later. When a note says only “shoulder follow-up,” the seventh character turns into a query or a guess.

In Pabau, you can customize SOAP note templates so each follow-up note asks for laterality, subluxation direction and treatment phase. Digital forms collect intake and history before the visit, and both sit in the same patient record.

Pabau’s claims management software then sends the claim through the Claim.MD integration. Reporting tools let you track billing performance, so you can spot repeat errors early.

Reduce ICD-10 coding errors at the point of documentation

Pabau’s customizable SOAP note templates and digital forms help clinicians record laterality and treatment phase at every visit. Claims then go out through the Claim.MD integration.

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Conclusion

The seventh character on ICD-10 code S43.001D is decided in the clinical note, long before anyone opens a claim. A note that names the right side, a subluxation and a finished active-treatment phase gives the coder the answer without a query.

So fix the note template before you chase denials. Add laterality and treatment-phase fields to your follow-up template, then audit A-coded follow-ups each month. It costs a few seconds per note and saves reworking claims later.

To see where coding fits in the wider cycle, read how revenue cycle management connects notes, claims and payments. Book a demo to see how Pabau’s SOAP templates and Claim.MD integration support your shoulder follow-up billing.

Continue your research

Need to understand how ICD-10 codes flow into claims? What is medical billing walks through the full note-to-payment cycle for US practices.

Coding a posterior shoulder dislocation follow-up? ICD-10 code S43.024D covers posterior dislocation of the right humerus at the subsequent encounter.

Billing functional training at the same visit? CPT code 97530 explains the therapeutic activities code that often accompanies shoulder rehab.

Want to reduce claim denials across your shoulder caseload? Denial codes in medical billing covers the most common CARC codes and how to respond to each.

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