Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Dr. Jose A Sierra Jr., DDS, MS

Prosthodontics in Franklin, WI · enumerated 2016.

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

National Provider Identifier

1386095503

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Registry record

Entity type Individual (Type 1)

Name Dr. Jose A Sierra Jr.

Credential DDS, MS

Sex Male

Practice address 6855 S 27th St, Franklin, WI, 53132

Phone (414) 435-0787

Enumeration date Jun 29, 2016

Last updated in NPPES Nov 27, 2017

Taxonomy & licenses

1223P0700X Prosthodontics Dental Providers · License 1001424-15 (WI) Primary

DDS · Doctor of Dental Surgery: A licensed dentist; DDS and DMD are equivalent dental degrees. About the DDS credential

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

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.

What specialty is Jose Sierra?

Jose Sierra is registered in NPPES with the primary taxonomy of Prosthodontics. The taxonomy code describes the provider's classification and area of specialization for claims and credentialing.

Other providers at this practice address

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Edward Breecher Endodontics · Franklin, WI NPI 1164492377 Eric Liedtke Orthodontics and Dentofacial Orthopedics Dentistry · Franklin, WI NPI 1245398924 Yiu Cheung Chow Periodontics · Franklin, WI NPI 1942499082 Nicole Sawatzke General Practice Dentistry · Franklin, WI NPI 1093152373 Emily Skibinski General Practice Dentistry · Franklin, WI NPI 1801259270 Mohammed Mansour General Practice Dentistry · Franklin, WI NPI 1932634425 Richard Ariza General Practice Dentistry · Franklin, WI NPI 1902309685 Natalie Brown General Practice Dentistry · Franklin, WI NPI 1053896969

Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2017-11-27.