Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Mary Ellen Clark, CFNP

Q: What is the NPI number for Mary Clark?

The National Provider Identifier (NPI) for Mary Clark is 1891031621, a Type 1 (individual) record in the CMS NPPES registry.

Family Nurse Practitioner in Warren, IN · enumerated 2012.

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

National Provider Identifier

1891031621

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Registry record

Entity type Individual (Type 1)

Name Mary Ellen Clark

Credential CFNP

Sex Female

Practice address 824 Huntington Ave, Warren, IN, 46792

Phone (260) 375-2965

Fax (260) 375-2969

Enumeration date Dec 26, 2012

Last updated in NPPES Oct 7, 2025

Taxonomy & licenses

363LF0000X Family Nurse Practitioner Physician Assistants & Advanced Practice Nursing Providers · License CNP-02460 (NM) Secondary

363LF0000X Family Nurse Practitioner Physician Assistants & Advanced Practice Nursing Providers · License 71016668A (IN) Primary

363LP2300X Primary Care Nurse Practitioner Physician Assistants & Advanced Practice Nursing Providers · License 66049 (ID) Secondary

363LF0000X Family Nurse Practitioner Physician Assistants & Advanced Practice Nursing Providers · License 201250210NP (OR) Secondary

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

Where does Mary Clark practice?

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

What is the NPI number for Mary Clark?

The National Provider Identifier (NPI) for Mary Clark is 1891031621, a Type 1 (individual) record in the CMS NPPES registry.

Other providers at this practice address

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Markle Medical Center, Inc Family Medicine Physician · Warren, IN NPI 1942272943 Deborah Miller Family Medicine Physician · Warren, IN NPI 1811960396 Victoria Heinen Family Medicine Physician · Warren, IN NPI 1548234438 Judith Ripperger Physician Assistant · Warren, IN NPI 1407071848 Amber Mcclain Family Nurse Practitioner · Warren, IN NPI 1689432114 Meridian Health Services Corp. Federally Qualified Health Center (FQHC) · Warren, IN NPI 1902634041

Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2025-10-07.