OB-GYN Access: Supply, ACA Networks & Coverage
Access to OB-GYN care: A Deep Dive into Marketplace Network Adequacy
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Access to quality healthcare, notably for women’s health needs, remains a critical concern.This article examines the availability of OB-GYN care within the HealthCare.gov marketplace, focusing on network adequacy standards and the challenges in accurately assessing provider access. We’ll explore how these networks measure up, the data sources used to evaluate them, and the limitations inherent in assessing real-world access to care.
Understanding Network Adequacy Standards for ACA Plans
The Affordable Care Act (ACA) marketplaces require health plans to maintain adequate networks of providers to ensure enrollees have reasonable access to care. These “network adequacy” standards are designed to prevent plans from attracting customers with low premiums only to leave them with limited options for finding doctors.
Specifically,for HealthCare.gov plans, regulations dictate acceptable travel times and distances to essential providers, including OB-GYNs. These standards, detailed in here.
However, it’s crucial to note that these regulations are based on proximity to plan enrollees. Our analysis takes a slightly different approach, measuring distance from the population-weighted center of the county to provide a broader perspective. County classifications (rural, small urban, metro) are based on established data sources and methodologies detailed in related OB-GYN workforce analyses.
How Many OB-GYNs Are Actually Available? Data Sources and Challenges
Determining the size of the active OB-GYN workforce is a complex undertaking.We relied primarily on Medicare Data on Provider Practise and Specialty (MD-PPAS) https://resdac.org/cms-data/files/md-ppas, a federal database of physicians who submitted at least one Medicare Part B claim in 2021. this provides a strong foundation, as virtually all OB-GYNs (approximately 99%, with only 1% opting out of Medicare https://www.kff.org/medicare/issue-brief/how-many-physicians-have-opted-out-of-the-medicare-program/) participate in Medicare.
In 2021, MD-PPAS included 34,945 OB-GYNs.
Representativeness of the MD-PPAS Data
While MD-PPAS is a valuable resource, a potential concern is whether it fully captures the OB-GYN workforce.To address this, we compared the proportion of OB-GYNs filing Medicare Part B claims to other specialties. We examined data from the National Plan and Provider Enumeration System (NPPES), a federal registry of healthcare providers, cross-referenced with MD-PPAS claim data.
Our findings showed that 61% of OB-GYNs filed a Part B claim – a rate comparable to adult primary care physicians (57%) and all designated physician specialties (58%). This suggests MD-PPAS provides a reasonably representative sample of practicing OB-GYNs.
Limitations and Potential Biases in Network Assessments
Despite the robust data sources, several factors can influence the accuracy of network adequacy assessments:
Missed Providers: Some OB-GYNs may not appear in MD-PPAS if they participate exclusively in closed-network HMOs serving commercial populations or specialize in services rarely used by Medicare enrollees. Telehealth providers with addresses outside the local market are also excluded.
Group Practice Representation: plans may list group practices rather than individual providers, potentially undercounting the total number of available OB-GYNs.
* “Phantom Providers”: A significant challenge is the presence of “phantom providers” - physicians listed in plan directories who are no longer accepting new patients or no longer participate in the plan. This artificially inflates the