Tendon	CPT Code(s) for Primary Repair	Unique CPT Code(s) for Secondary Repair	Prevalence of Bilateral / Subsequent Contralateral Pathology	Risk of Coding Bias	ICD-10 Codes Used for Laterality
Distal Biceps	24342	N/A	Subsequent Contralateral Rupture: 7.8% (25/321) – 13.0% (3/23), both at >4-year follow-up [@174267; @174271] Bilateral Ruptures: 1.2 per 100,000[@174286]	Low-to-Mediuma	No
Rotator Cuff	29827	N/A	Subsequent Contralateral Repair: 56.6% within 2 years of first surgery in patients with bilateral tears[@174261] Bilateral Tears: 25.9% (38/147) – 38.3% (69/180)[@174249; @174280]	High	Yes
Achilles	27650, 27652	27654	Subsequent Contralateral Rupture: 1.8% (4/226) – 6.5% (10/154)[@174252; @174282] Bilateral Ruptures: < 1% of all ruptures[@174269]	Lowb	No