Insurance Acceptance, Appointment Wait Time, and Dermatologist Access Across Practice Types in the US

IMPORTANCE: In the 15 years since dermatology access was last investigated on a national scale, the practice landscape has changed with the rise of private equity (PE) investment and increased use of nonphysician clinicians (NPCs). OBJECTIVE: To determine appointment success and wait times for patients with various insurance types at clinics with and without PE ownership. DESIGN, SETTING, AND PARTICIPANTS: In this study, PE-owned US clinics were randomly selected and matched with 2 geographically proximate clinics without PE ownership. Researchers called each clinic 3 times over a 5-day period to assess appointment/clinician availability for a fictitious patient with a new and changing mole. The 3 calls differed by insurance type specified, which were Blue Cross Blue Shield (BCBS) preferred provider organization, Medicare, or Medicaid. MAIN OUTCOMES AND MEASURES: Appointment success and wait times among insurance types and between PE-owned clinics and control clinics. Secondary outcomes were the provision of accurate referrals to other clinics when appointments were denied and clinician and next-day appointment availability. RESULTS: A total of 1833 calls were made to 204 PE-owned and 407 control clinics without PE ownership across 28 states. Overall appointment success rates for BCBS, Medicare, and Medicaid were 96%, 94%, and 17%, respectively. Acceptance of BCBS (98.5%; 95% CI, 96%-99%; P = .03) and Medicare (97.5%; 95% CI, 94%-99%; P = .02) were slightly higher at PE-owned clinics (compared with 94.6% [95% CI, 92%-96%] and 92.8% [95% CI, 90%-95%], respectively, at control clinics). Wait times (median days, interquartile range [IQR]) were similar for patients with BCBS (7 days; IQR, 2-22 days) and Medicare (7 days; IQR, 2-25 days; P > .99), whereas Medicaid patients waited significantly longer (13 days; IQR, 4-33 days; P = .002). Clinic ownership did not significantly affect wait times. Private equity–owned clinics were more likely than controls to offer a new patient appointment with an NPC (80% vs 63%; P = .001) and to not have an opening with a dermatologist (16% vs 6%; P