Medical and Health Services Listings

The listings compiled on this page represent reference entries for medical and health services available across the United States, organized to support patient navigation of a complex, fragmented care infrastructure. Each entry reflects publicly documented program and provider information drawn from federal and state sources, including those governed by the Centers for Medicare & Medicaid Services (CMS), the Health Resources & Services Administration (HRSA), and the Department of Health and Human Services (HHS). The purpose and scope of this directory and the broader topic context for medical and health services are documented in companion pages. Understanding what these listings do and do not represent is essential for accurate interpretation.

Geographic Distribution

Listings span all 50 states plus the District of Columbia, with additional entries for U.S. territories including Puerto Rico, Guam, and the U.S. Virgin Islands where federally recognized program infrastructure exists. Coverage density is not uniform. Rural and frontier regions — those defined under the Federal Office of Rural Health Policy (FORHP) criteria as having fewer than 10,000 residents per county — are structurally underrepresented relative to metropolitan statistical areas (MSAs), reflecting documented access disparities rather than editorial omission.

Programs administered through HRSA's Health Center Program operate at over 1,400 federally qualified health center (FQHC) organizations as reported in HRSA's Uniform Data System (UDS), delivering care through approximately 14,000 service delivery sites nationally. These sites anchor geographic coverage in areas with limited private-sector provider presence. Rural health services access and federally qualified health centers are cross-referenced for readers seeking geographically specific program data.

State-specific programs — including Medicaid expansion variants adopted under the Affordable Care Act (ACA) Section 1396a — introduce variation at the state level that affects which services appear in listings for a given geography. As of the ACA's passage in 2010, Medicaid eligibility thresholds and covered benefits diverge substantially across states that have and have not adopted expansion under 42 U.S.C. § 1396.

How to Read an Entry

Each listing entry follows a standardized field structure. The fields present in a complete entry are:

1. Program or provider name — The legal or operating name as registered with the relevant federal or state authority.
2. Service category — Classified according to the CMS taxonomy of health service types, which distinguishes between acute care, primary care, specialty care, behavioral health, post-acute care, and community-based services.
3. Eligibility criteria — The documented income, insurance status, age, residency, or clinical criteria that govern access, drawn from program authorizing statutes or CMS plan documentation.
4. Coverage mechanism — Whether services are funded through Medicare, Medicaid, CHIP, private insurance, sliding-scale fee, or grant-based zero-cost access.
5. Regulatory authority — The federal or state agency with oversight jurisdiction, such as CMS, HRSA, the Substance Abuse and Mental Health Services Administration (SAMHSA), or a state Department of Health.
6. Verification source — The public document, database, or registry from which entry data was drawn, with the access date recorded at time of compilation.

Entries that reflect HRSA-designated shortage areas carry a Health Professional Shortage Area (HPSA) notation. Entries lacking a verification source field have not passed the confirmation threshold and appear with a pending-review flag rather than a confirmed status indicator.

What Listings Include and Exclude

Included:

• Federally funded programs with documented eligibility criteria and statutory authorization
• State Medicaid and CHIP programs referenced to CMS State Plan Amendments
• HRSA-funded health centers, free clinics registered under Section 340B of the Public Health Service Act, and National Health Service Corps placement sites
• Telehealth programs with CMS billing authorization under CPT codes recognized in the Medicare Physician Fee Schedule
• Behavioral health and substance use disorder treatment services licensed under SAMHSA certification standards
• Veterans health services administered through the Veterans Health Administration (VHA) under Title 38 U.S.C.
• Indian Health Service patient access programs under the Indian Health Care Improvement Act (25 U.S.C. § 1601 et seq.), including urban Indian organizations and their employees deemed part of the Public Health Service for purposes of personal injury claims effective January 5, 2021, pursuant to enacted legislation extending Federal Tort Claims Act protections to such organizations and their employees

Excluded:

• Unlicensed providers or programs lacking state or federal authorization at time of compilation
• Individual private-practice physician listings not affiliated with a recognized network or program
• Experimental or investigational services not approved under FDA authorization or active clinical trial registration
• Concierge medicine and direct primary care arrangements that operate outside insurance billing frameworks
• Services operating exclusively under state licensure without any federal program affiliation or verification pathway

This distinction parallels the difference between in-network and out-of-network providers in insurance contexts — the presence of a listing does not constitute an endorsement or a coverage determination.

Verification Status

Listings are classified into three verification tiers based on source quality and confirmation recency:

• Confirmed — Entry data matches a live federal database record (e.g., HRSA Find a Health Center, CMS Provider Enrollment, Chain, and Ownership System [PECOS], or SAMHSA Behavioral Health Treatment Services Locator) verified within the current compilation cycle.
• Pending Review — Entry was drawn from a publicly available state registry or program document but has not been cross-checked against a federal enrollment database. These entries carry known uncertainty and should be treated as directional references.
• Archived — Entry reflects a program or provider that appeared in prior compilations but could not be confirmed as active in the most recent verification pass. Archived entries are retained for research continuity but are clearly flagged as unconfirmed.

HIPAA's administrative simplification provisions (45 C.F.R. Parts 160 and 164) do not govern directory accuracy, but the HIPAA patient privacy rights framework is relevant context for understanding what information about providers is subject to federal protection versus what exists in public registries. Verification methodology is documented in full in the how to use this resource guide. Entries referencing patient financial assistance programs are subject to additional verification steps due to program eligibility variability across hospital systems and fiscal years.