Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Dr. Toby Ann Ritterhoff, M.D.

Specialist in Durham, NC · enumerated 2006.

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

National Provider Identifier

1780773606

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Registry record

Entity type Individual (Type 1)

Name Dr. Toby Ann Ritterhoff

Credential M.D.

Sex Female

Practice address 209 E Carver St, Durham, NC, 27704

Phone (919) 471-2273

Fax (919) 479-0881

Enumeration date Oct 11, 2006

Last updated in NPPES Feb 26, 2008

Taxonomy & licenses

174400000X Specialist Other Service Providers · License D38500 (MD) Secondary

174400000X Specialist Other Service Providers Primary

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

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 Toby Ritterhoff?

The National Provider Identifier (NPI) for Toby Ritterhoff is 1780773606, a Type 1 (individual) record in the CMS NPPES registry.

Where does Toby Ritterhoff practice?

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

Other providers at this practice address

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Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2008-02-26.