Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Dr. Marcia Mastrin, M.D.

Specialist in Phoenix, AZ · enumerated 2006.

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

National Provider Identifier

1801906771

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Registry record

Entity type Individual (Type 1)

Name Dr. Marcia Mastrin

Credential M.D.

Sex Female

Practice address 2040 W Bethany Home Rd, Ste 102, Phoenix, AZ, 85015

Phone (602) 368-8800

Fax (602) 368-8801

Enumeration date Aug 30, 2006

Last updated in NPPES Mar 30, 2012

Taxonomy & licenses

174400000X Specialist Other Service Providers · License 31029 (AZ) Primary

MD · Doctor of Medicine: A physician who completed medical school (allopathic medicine), residency training, and state licensure. About the MD credential

Other identifiers

Identifier	Type	State	Issuer
AZ0770960	Other	AZ	BCBS
927270	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 Marcia Mastrin practice?

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

What is the NPI number for Marcia Mastrin?

The National Provider Identifier (NPI) for Marcia Mastrin is 1801906771, a Type 1 (individual) record in the CMS NPPES registry.

Other providers at this practice address

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Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2012-03-30.