Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Mr. Mark Walthofer, MASTER OF SOCIAL WOR

Clinical Social Worker in Wyomissing, PA · enumerated 2007.

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

National Provider Identifier

1609993732

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Registry record

Entity type Individual (Type 1)

Name Mr. Mark Walthofer

Credential MASTER OF SOCIAL WOR

Sex Male

Practice address 510 N Park Rd, Wyomissing, PA, 19610

Phone (610) 507-2657

Fax (610) 507-2657

Enumeration date Mar 23, 2007

Last updated in NPPES May 9, 2013

Taxonomy & licenses

1041C0700X Clinical Social Worker Behavioral Health & Social Service Providers · License CW013521 (PA) Primary

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

What is the NPI number for Mark Walthofer?

The National Provider Identifier (NPI) for Mark Walthofer is 1609993732, a Type 1 (individual) record in the CMS NPPES registry.

Where does Mark Walthofer practice?

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

Other providers at this practice address

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Kathryn Hynes Clinical Psychologist · Wyomissing, PA NPI 1851357099 Bonnie Delong Psychologist · Wyomissing, PA NPI 1700843604 Bright Towers Inc Case Management Agency · Wyomissing, PA NPI 1750730032 Everyday Home Care- Reading Home Health Agency · Wyomissing, PA NPI 1720627797

Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2013-05-09.