Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Joseph A Mountain Jr., DMD

General Practice Dentistry in York, PA · enumerated 2006.

Data current as of Jul 13, 2026 · sourced from CMS NPPES

National Provider Identifier

1164469458

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Registry record

Entity type Individual (Type 1)

Name Joseph A Mountain Jr.

Credential DMD

Sex Male

Practice address 116 S George St, York, PA, 17401

Phone (717) 845-8617

Fax (717) 718-1317

Enumeration date Jun 2, 2006

Last updated in NPPES Aug 31, 2011

Taxonomy & licenses

1223G0001X General Practice Dentistry Dental Providers · License DS036194 (PA) Primary

DMD · Doctor of Medicine in Dentistry: A licensed dentist; DMD and DDS are equivalent dental degrees. About the DMD credential

Other identifiers

Identifier	Type	State	Issuer
248138	Other	PA	DENTAL BENEFIT PROVIDERS
DS036194	Other	PA	DELTA DENTAL
9179593	Other	PA	DORAL DENTAL
169247	Other	PA	UNISON
1734164	Other	PA	UNITED CONCORDIA
101296251	Medicaid	PA	-

What is an NPI number?

A National Provider Identifier (NPI) is a unique 10-digit number that CMS assigns to every U.S. healthcare provider and organization under HIPAA. Type 1 NPIs identify individual providers; Type 2 NPIs identify organizations. The NPI appears on insurance claims, prescriptions, and credentialing paperwork, and never changes, even if the provider moves or changes specialty.

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Frequently asked questions

What specialty is Joseph Mountain?

Joseph Mountain is registered in NPPES with the primary taxonomy of General Practice Dentistry. The taxonomy code describes the provider's classification and area of specialization for claims and credentialing.

Is this the official NPI registry?

No. NPI Portal is a private site built on public CMS NPPES data. The official registry is npiregistry.cms.hhs.gov, operated by CMS.

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Nicole Toth Pediatrics Physician · York, PA NPI 1891763272 Dana Linn-Toomey Podiatrist · York, PA NPI 1396707329 James Patsis General Practice Dentistry · York, PA NPI 1265470587 Mary Van Metre Family Nurse Practitioner · York, PA NPI 1750328035 Junia Tiruchelvam Family Medicine Physician · York, PA NPI 1316984693 Asceline Go Family Medicine Physician · York, PA NPI 1013955459 Brooke Lasher Medical Physician Assistant · York, PA NPI 1366483901 Family First Health Corporation Federally Qualified Health Center (FQHC) · York, PA NPI 1881639904

Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2011-08-31.