Dr. Nancy Williams-Horak MD
About this NPIWhat this record shows.
NPI 1215903166 is registered to Dr. Nancy Williams-Horak MD, a Neonatal-Perinatal Medicine Physician practising at 110 Irving St Nw, Room 5b-17 in Washington, Washington DC. Neonatal-Perinatal Medicine Physician is a recognised medical specialty under the National Uniform Claim Committee (NUCC) taxonomy. Dr. Nancy Williams-Horak MD has been enumerated in the National Provider Identifier (NPI) registry since 2006.
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Secondary identifiers
Additional identifiers this provider has registered with NPPES. Used by medical billers, credentialers, and insurance verifiers to cross-reference claims and enrollments.
Source: NPPES public registry.
Insurance & acceptsHow to confirm coverage.
The National Plan and Provider Enumeration System (NPPES) registry does not include commercial insurance network data, so we cannot show which plans Dr. Nancy Williams-Horak MD accepts. To confirm in-network status with your specific health plan, contact Dr. Nancy Williams-Horak MD directly at (202) 877-6527.
Frequently asked
Yes. NPI 1215903166 is registered as Active in the CMS NPPES public registry and passes the Luhn check-digit validation that all 10-digit NPIs use.
Neonatal-Perinatal Medicine Physician is a recognised medical specialty under the National Uniform Claim Committee (NUCC) taxonomy.
The CMS NPPES Public Registry at npiregistry.cms.hhs.gov is the authoritative source. FindMyNPI mirrors this dataset and refreshes monthly. For real-time verification, you can also call the provider's office at (202) 877-6527.
An individual healthcare provider has a single Type-1 NPI for life. Organisations can hold separate Type-2 NPIs per location, specialty, or sub-entity. Dr. Nancy Williams-Horak MD is a Type-1 individual NPI.