Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

William Frederick Fitter, M.D.

Anatomic Pathology & Clinical Pathology Physician in Tulsa, OK · enumerated 2006.

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

National Provider Identifier

1003837600

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Registry record

Entity type Individual (Type 1)

Name William Frederick Fitter

Credential M.D.

Sex Male

Practice address 1923 S Utica Ave, Tulsa, OK, 74104

Phone (918) 744-2553

Fax (918) 744-3482

Enumeration date Jul 21, 2006

Last updated in NPPES Aug 13, 2007

Taxonomy & licenses

207ZP0102X Anatomic Pathology & Clinical Pathology Physician Allopathic & Osteopathic Physicians · License 16319 (OK) Primary

207ZP0102X Anatomic Pathology & Clinical Pathology Physician Allopathic & Osteopathic Physicians · License 04-28864 (KS) Secondary

207ZP0102X Anatomic Pathology & Clinical Pathology Physician Allopathic & Osteopathic Physicians · License 4301039358 (MI) Secondary

207ZP0104X Chemical Pathology Physician Allopathic & Osteopathic Physicians · License 16319 (OK) Secondary

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
1827	Medicaid	OK	-

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 William Fitter?

The National Provider Identifier (NPI) for William Fitter is 1003837600, a Type 1 (individual) record in the CMS NPPES registry.

Where does William Fitter practice?

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

Other providers at this practice address

Browse all →

Mark Mills Pharmacotherapy Pharmacist · Tulsa, OK NPI 1174527667 Dwain Simpson Clinical Social Worker · Tulsa, OK NPI 1922007830 Continuous Care Center of Tulsa, Inc. Long Term Care Hospital · Tulsa, OK NPI 1366442006 Richard Smarinsky Anesthesiology Physician · Tulsa, OK NPI 1205821436 Michelle Brotherton Obstetrics & Gynecology Physician · Tulsa, OK NPI 1285622464 James Geurin Radiation Oncology Physician · Tulsa, OK NPI 1437149457 George Carrico Emergency Medical Services (Emergency Medicine) Physician · Tulsa, OK NPI 1871583625 Michael Fogli Cardiovascular Disease Physician · Tulsa, OK NPI 1407827579

Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2007-08-13.