CurrentPremera BluecrossPolicy 7.01.180

Balloon Spacers for Treatment of Irreparable Rotator Cuffs of the Shoulder

Premera Bluecross medical policy on the use of biodegradable subacromial balloon spacers (subacromial spacer implantation) to treat massive, irreparable, full-thickness rotator cuff tears; defines coverage stance, coding, evidence summary, and policy effective dates.

Policy Summary

PayerPremera Bluecross

PolicyBalloon Spacers for Treatment of Irreparable Rotator Cuffs of the Shoulder

Policy CodePolicy 7.01.180

Change TypeNew policy

Effective DateOct 3, 2025

Next Review Date

Key ActionDocument clinical and imaging evidence that the rotator cuff tear is massive and irreparable and record prior nonoperative treatments and rationale for considering spacer implantation when submitting for review.

SourceLink

InvestigationalCoverage stance for subacromial balloon spacer implantation

29999, C9781Codes listed in policy

Age ≥65FDA-cleared indication population for InSpace device

Coverage determination for subacromial balloon spacer implantation

Coverage Determination (Investigational)

Policy position regarding subacromial balloon spacer implantation:

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Documentation and submission guidance

Documentation Required

Document that tear is massive and irreparable

Document clinical and imaging evidence that the rotator cuff tear meets criteria for being both massive and irreparable when submitting for review; the policy treats subacromial balloon spacer implantation as investigational and evidence insufficient. Provide objective measures of tear size, tendon retraction, and muscle degeneration (atrophy/fatty infiltration) in the record.

Affected codes: 29999 (Unlisted procedure, arthroscopy)
Affected codes: C9781 (Arthroscopy, shoulder, with implantation of subacromial spacer)

Documentation Required

Document prior nonoperative care and alternative surgical options considered

Because evidence is inconclusive and comparative trials showed mixed or no benefit versus debridement or partial repair, document prior nonoperative treatments tried and the clinical rationale for considering a spacer, including why other surgical options are unsuitable for this patient.

Suggested documentation elements: prior nonoperative treatments (physical therapy, activity modification, NSAIDs, corticosteroid injections)
Details on prior surgical options considered and why they were unsuitable (partial repair, tendon transfer, reverse total shoulder arthroplasty, arthroscopic debridement)
Clinical reasoning referencing patient-specific factors (functional requirements, comorbidities, anatomy)

Clinical background and evidence summary

Subacromial balloon spacers are biodegradable implants placed arthroscopically into the subacromial space to depress the humeral head and reduce acromiohumeral contact, with the intended effect of restoring shoulder mechanics, reducing subacromial impingement, and alleviating pain and functional limitation in patients with massive, irreparable full-thickness rotator cuff tears. The inflated device creates a temporary articulating interface between the humeral head and acromion and is designed to remain inflated for several months before gradual deflation; the InSpace system specifically is described as remaining inflated for 3 to 4 months and biodegrading over approximately 1 year.

Clinical definitions and patient selection thresholds commonly used in the literature and in this policy define a massive rotator cuff tear as a full-thickness tear involving at least 2 tendons or measuring > 5 cm in the coronal plane, with an alternative Delphi consensus definition that emphasizes tendon retraction to the glenoid rim or ≥ 67% greater tuberosity exposure. Tears are considered irreparable when standard surgical release and mobilization cannot restore the tendon to its original tuberosity insertion because of excessive size, retraction, and muscle degeneration (atrophy/fatty infiltration).

The evidence base includes randomized controlled trials, meta-analyses, nonrandomized comparative studies, and case series. Results are mixed: one noninferiority RCT comparing the spacer to partial repair found comparable American Shoulder and Elbow Surgeons (ASES) scores at 24 months with some device advantages (better forward elevation, shorter operative times) and apparent noninferiority in an older subset, whereas another RCT comparing debridement with and without the spacer was stopped early for futility and favored debridement alone. Meta-analyses and comparative studies generally do not show consistent superiority of the spacer over alternative surgical treatments, and some reviews reported superior pain and functional outcomes with debridement alone.

Device-related complications have been reported but are uncommon; reported events include implant migration, early deflation requiring removal for pain, progression of glenohumeral osteoarthritis, conversion to other surgical procedures, and infection. Multiple studies emphasize careful individual patient selection, and while some uncontrolled series report sustained improvements out to mid- and long-term follow-up, the overall body of evidence is judged insufficient to demonstrate a net health benefit.

Policy conclusion: Evidence is insufficient to determine that subacromial balloon spacer implantation improves net health outcomes for massive, irreparable rotator cuff tears, and the procedure is considered investigational (not covered) in this policy.

Defined terms

Definitions

Massive rotator cuff tearCommonly defined as full-thickness tears involving ≥2 tendons or >5 cm in coronal plane; Delphi consensus also uses tendon retraction to the glenoid rim and/or ≥67% greater tuberosity exposure.

Irreparable rotator cuff tearA tear that cannot be restored to its original insertion on the tuberosities using standard surgical release and mobilization due to excessive size, tendon retraction, and muscle degeneration (atrophy, fatty infiltration).

InvestigationalA service or device for which evidence is insufficient to determine that the technology improves the net health outcome; typically not covered.