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About this NPIWhat this record shows.
NPI 1598830564 is registered to John T Armstrong Jr MD INC, a healthcare organisation classified as "Gynecology" and located at 3434 Villa Ln Ste 360 in Napa, California. The organisation's authorised official is John Armstrong. The organisation has been enumerated in the NPI registry since 2006.
Provider type
Organisation (Type 2)
Status
Active
Enumerated
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This provider holds a Medicare enrollment on file with the Provider Enrollment, Chain and Ownership System (PECOS). Each enrollment carries a public Medicare Enrollment ID (ENRLMT_ID) used by billers and intermediaries.
The National Plan and Provider Enumeration System (NPPES) registry does not include commercial insurance network data, so we cannot show which plans John T Armstrong Jr MD INC accepts. To confirm in-network status with your specific health plan, contact John T Armstrong Jr MD INC directly at (707) 257-4317.
Frequently asked
Yes. NPI 1598830564 is registered as Active in the CMS NPPES public registry and passes the Luhn check-digit validation that all 10-digit NPIs use.
Gynecology 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 (707) 257-4317.
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. John T Armstrong Jr MD INC is a Type-2 organisational NPI.
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