Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Mary S. Hattemer, L.I.S.W.

Social Worker in Hamilton, OH · enumerated 2006 · practices at Helen Holtman, M.D. and Associates Inc..

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

National Provider Identifier

1851409312

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Registry record

Entity type Individual (Type 1)

Name Mary S. Hattemer

Credential L.I.S.W.

Sex Female

Practice address 2201 Nw Washington Blvd, Ste A, Hamilton, OH, 45013

Phone (513) 869-7000

Fax (515) 785-4272

Enumeration date Aug 26, 2006

Last updated in NPPES Oct 31, 2007

Taxonomy & licenses

104100000X Social Worker Behavioral Health & Social Service Providers · License I0005217 (OH) Primary

104100000X Social Worker Behavioral Health & Social Service Providers · License 1035 (KY) 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.

Read the full guide → Validate an NPI →

Frequently asked questions

What is the NPI number for Mary Hattemer?

The National Provider Identifier (NPI) for Mary Hattemer is 1851409312, a Type 1 (individual) record in the CMS NPPES registry.

Where does Mary Hattemer practice?

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

Other providers at this practice address

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Helen Holtman Psychiatry Physician · Hamilton, OH NPI 1457435075 Helen Holtman, M.D. and Associates Inc. Psychiatry Physician · Hamilton, OH NPI 1750506556

Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2007-10-31.