Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum Sole proprietor

Mrs. Crystal M Ostermeyer, PA-C

Physician Assistant in Mesa, AZ · enumerated 2012.

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

National Provider Identifier

1972848315

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Registry record

Entity type Individual (Type 1)

Name Mrs. Crystal M Ostermeyer

Credential PA-C

Sex Female

Practice address Mesa, AZ, 85202

Phone (480) 412-6970

Enumeration date Dec 11, 2012

Last updated in NPPES Nov 30, 2021

Street address withheld: NPPES sole-proprietor addresses can be home addresses. See our data policy.

Taxonomy & licenses

363A00000X Physician Assistant Physician Assistants & Advanced Practice Nursing Providers · License 5261 (AZ) Primary

Other identifiers

Identifier	Type	State	Issuer
816462	Medicaid	AZ	-

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

Where does Crystal Ostermeyer practice?

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

What is the NPI number for Crystal Ostermeyer?

The National Provider Identifier (NPI) for Crystal Ostermeyer is 1972848315, a Type 1 (individual) record in the CMS NPPES registry.

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Dayana Dominguez Batista Pediatric Sleep Medicine Physician · Mesa, AZ NPI 1245735026

Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2021-11-30.