Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Dr. Cristian Amado Sierra, DMD

Dentist in Atascadero, CA · enumerated 2014 · practices at Cristian A Sierra, D.M.D., Inc..

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

National Provider Identifier

1265849426

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Registry record

Entity type Individual (Type 1)

Name Dr. Cristian Amado Sierra

Credential DMD

Sex Male

Practice address 5960 West Mall Ste A, Atascadero, CA, 93422

Phone (805) 466-5787

Fax (805) 466-6531

Enumeration date Jul 18, 2014

Last updated in NPPES Dec 13, 2019

Taxonomy & licenses

122300000X Dentist Dental Providers · License 64345 (CA) Primary

122300000X Dentist Dental Providers · License 0000010092 (TN) Secondary

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

Read the full guide → Validate an NPI →

Frequently asked questions

What is the NPI number for Cristian Sierra?

The National Provider Identifier (NPI) for Cristian Sierra is 1265849426, a Type 1 (individual) record in the CMS NPPES registry.

Where does Cristian Sierra practice?

The practice location on file with NPPES is in Atascadero, CA. Providers can have multiple locations; NPPES lists the primary practice address.

Other providers at this practice address

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Cristian A Sierra, D.M.D., Inc. Dental Clinic/Center · Atascadero, CA NPI 1811412794

Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2019-12-13.