Open surgical correction of a sternoclavicular joint dislocation, performed for either an acute injury or a chronic unstable condition.

Verified May 8, 2026 · 6 sources ↓

Medicare: $549.11
Total RVUs: 16.44
Global, days: 90
Region: Shoulder

Drawn from CMSMdclarityAbosAcgme

Documentation requirements

What must appear in the operative or office note to support the claim.

Source · Editorial brief grounded in 6 cited references ↓

Specify laterality (right or left) in the operative note and diagnosis coding
Document the mechanism and chronicity — acute traumatic event vs. chronic/recurrent instability
Record failed or contraindicated closed reduction attempts justifying open approach
Describe the surgical approach, joint exposure technique, and stabilization method used
Note any intraoperative findings (labral tear, posterior displacement, mediastinal proximity) that support medical necessity
If modifier 22 is appended, document specific factors that increased complexity or operative time beyond the typical case

Applicable modifiers

Modifiers commonly billed with this code.

Source · AMA CPT modifier descriptors · CMS NCCI Policy Manual

22 Increased complexity 50 Bilateral procedure 51 Multiple procedures 52 Reduced services 57 Decision for surgery 58 Staged or related 59 Distinct service 62 Co-surgeons 76 Repeat, same physician 77 Repeat, another physician 78 Unplanned return — related 79 Unrelated during global 80 Assistant surgeon LT Left side RT Right side XS Separate structure

What this code covers

Source · Editorial summary grounded in 6 cited references ↓

CPT 23530 covers open treatment of a sternoclavicular (SC) dislocation — the joint where the medial clavicle meets the sternum — whether the instability is acute (recent traumatic event) or chronic (persistent or recurrent). The procedure requires direct visualization, joint reduction, and stabilization; it is selected when closed reduction has failed or is not appropriate, or when chronic instability has not responded to conservative management. Posterior SC dislocations, which carry risk of injury to mediastinal structures, are a common driver of surgical intervention.

This code carries a 90-day global period. All routine post-op visits, wound checks, and dressing changes through day 90 are bundled. Unrelated E/M services billed in that window require modifier 24; a separate, significant E/M on the day of surgery requires modifier 25. If the surgeon proceeds to SC reconstruction with fascial graft at the same session, bill 23532 instead — that code specifically includes graft harvest and is not reported in addition to 23530.

Document laterality. The SC joint is a midline-adjacent structure, but unilateral procedures must be tied to a side for claim processing. Bilateral SC dislocations are rare; if billed with modifier 50, expect payer scrutiny and have operative documentation ready.

RVU & reimbursement

Component RVUs and Medicare national rate. Actual payment varies by GPCI locality.

Source · CMS Physician Fee Schedule, RVU26A · January 2026

Work RVU	7.29
Practice expense RVU	7.61
Malpractice RVU	1.54
Total RVU	16.44
Medicare national rate	$549.11
Global period	90 days

Payment by site of service

Medicare pays different rates by setting. HOPD typically pays substantially more than ASC for the same procedure.

Source · CMS OPPS Addendum B·ASC HCPCS payment rates·2026

Setting	Medicare rate (national)
Office (PFS non-facility) Procedure performed in physician's office	$549.11
HOPD (APC 5114) Hospital outpatient department	$7,413.38
ASC (PI J8) Ambulatory surgical center (freestanding)	$4,682.29

Common denial reasons

The recurring reasons claims for CPT 23530 get rejected.

Source · Editorial brief grounded in CMS NCCI edits, AAOS coding appeals, and cited references ↓

Missing or ambiguous laterality on the claim or ICD-10 diagnosis code
Medical necessity not established — no documentation of failed closed treatment or indication for open approach
Upcoded to 23530 when fascial graft was used; that work is captured by 23532, not 23530
Routine post-op E/M billed without modifier 24 during the 90-day global period
Modifier 22 appended without supporting narrative explaining the increased complexity

Frequently asked questions

Source · Generated from the editorial pipeline, verified against 6 cited references ↓

01What is the difference between 23530 and 23532?

23530 is open SC joint reduction and stabilization without a graft. 23532 includes fascial graft harvest and reconstruction — bill 23532 when a graft is obtained and used. Do not bill both codes for the same session.

02Can 23530 be billed bilaterally with modifier 50?

Bilateral SC dislocation is uncommon but not impossible. If both sides are treated open in the same session, append modifier 50 and ensure the operative note documents bilateral pathology and separate stabilization of each side. Expect payer scrutiny.

03How does the 90-day global period affect post-op billing?

All routine follow-up through day 90 is bundled into 23530. To bill an E/M during that window for an unrelated condition, append modifier 24. A new, significant problem addressed on the surgery date itself requires modifier 25 on the E/M.

04When is modifier 22 appropriate for 23530?

Append modifier 22 when documented intraoperative complexity — such as posterior dislocation with mediastinal involvement, dense adhesions from prior surgery, or significantly extended operative time — pushed the work well beyond a standard open SC reduction. The operative note must explain it explicitly; modifier 22 without narrative support will be denied.

05Is 23530 appropriate for posterior sternoclavicular dislocations?

Yes. Posterior SC dislocations are among the strongest indications for open treatment given proximity to great vessels, trachea, and esophagus. Document the posterior displacement and any vascular or airway risk that drove the decision to operate openly.

06Can an assistant surgeon bill under 23530?

If an assistant surgeon participates, they bill 23530 with modifier 80. Confirm that the payer allows assistant surgeon reimbursement for this code — some commercial payers and Medicare Advantage plans restrict it. Check your contract or the CMS PFS lookup before assuming payment.

Sources & references

Editorial content was developed using the following public sources. Last verified May 8, 2026.

Mira AI Scribe

Mira's AI scribe captures the mechanism of injury, chronicity classification (acute vs. chronic), laterality, any prior closed reduction attempts, the surgical approach and exposure method, stabilization technique, and intraoperative findings from dictation. This eliminates the most common audit flag for 23530 — operative notes that fail to establish why open treatment was required or omit the side operated on.

See how Mira captures CPT 23530 documentation