Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Dr. Karen Mazie, M.D.

Q: What is the NPI number for Karen Mazie?

The National Provider Identifier (NPI) for Karen Mazie is 1275670135, a Type 1 (individual) record in the CMS NPPES registry.

Pediatrics Physician in Washington, DC · enumerated 2007.

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

National Provider Identifier

1275670135

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Registry record

Entity type Individual (Type 1)

Name Dr. Karen Mazie

Credential M.D.

Sex Female

Practice address 3912 Georgia Ave Nw, Washington, DC, 20011

Phone (202) 420-7131

Enumeration date Jan 31, 2007

Last updated in NPPES Nov 30, 2011

Taxonomy & licenses

208000000X Pediatrics Physician Allopathic & Osteopathic Physicians · License MD035145 (DC) 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
036377400	Medicaid	DC	-

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 Karen Mazie practice?

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

What is the NPI number for Karen Mazie?

The National Provider Identifier (NPI) for Karen Mazie is 1275670135, 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 2011-11-30.