M35.7 Hypermobility syndrome

Billable ICD-10-CM code, FY2026.

Applicable to

• Familial ligamentous laxity

Excludes1 (never code together)

• ligamentous laxity, NOS (M24.2-)

Excludes2 (not included here)

• Ehlers-Danlos syndromes (Q79.6-)

Applies from M35 Other systemic involvement of connective tissue

Excludes1 (never code together)

• reactive perforating collagenosis (L87.1)

MS-DRG index

Defines the logic of DRG(s) 557-558 in MDC 08.

Approximate ICD-9-CM (GEMs)

• 728.5 Hypermobility syndrome

Code annotations containing back-references to M35.7

Back-references to M35.7

• Type 1 Excludes: M24.2 Disorder of ligament ("familial ligamentous laxity (M35.7)")

Back-references to M35

• Type 2 Excludes: I77 Other disorders of arteries and arterioles ("collagen (vascular) diseases (M30-M36)")
• Type 2 Excludes: J82 Pulmonary eosinophilia, not elsewhere classified ("pulmonary eosinophilia due to systemic connective tissue disorders (M30-M36)")
• Code First: J84.170 Interstitial lung disease with progressive fibrotic phenotype in diseases classified elsewhere ("systemic connective tissue disorders (M30-M36)")
• Type 1 Excludes: L94 Other localized connective tissue disorders ("systemic connective tissue disorders (M30-M36)")

Diagnosis Index entries for M35.7

• Hypermobility, hypermotility › syndrome
• Lax, laxity › ligament (ous) › familial
• Syndrome › hypermobility

Nearby codes

• M35.2 Behcet's disease
• M35.3 Polymyalgia rheumatica
• M35.4 Diffuse (eosinophilic) fasciitis
• M35.5 Multifocal fibrosclerosis
• M35.6 Relapsing panniculitis [Weber-Christian]
• M35.7 Hypermobility syndrome (this code)
• M35.8 Other specified systemic involvement of connective tissue
• M35.81 Multisystem inflammatory syndrome
• M35.89 Other specified systemic involvement of connective tissue
• M35.9 Systemic involvement of connective tissue, unspecified