Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Michael B Clearfield, D.O.

Internal Medicine Physician in Vallejo, CA · enumerated 2006.

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

National Provider Identifier

1689638561

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Registry record

Entity type Individual (Type 1)

Name Michael B Clearfield

Credential D.O.

Sex Male

Practice address 365 Tuolumne St, Vallejo, CA, 94590

Phone (707) 784-2001

Fax (707) 784-1494

Enumeration date Apr 17, 2006

Last updated in NPPES Mar 26, 2013

Taxonomy & licenses

207R00000X Internal Medicine Physician Allopathic & Osteopathic Physicians · License F5869 (TX) Secondary

207R00000X Internal Medicine Physician Allopathic & Osteopathic Physicians · License 20A9719 (CA) Primary

DO · Doctor of Osteopathic Medicine: A fully licensed physician trained in osteopathic medical schools, with the same practice rights as an MD. About the DO credential

Other identifiers

Identifier	Type	State	Issuer
134699104	Medicaid	TX	-

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

Where does Michael Clearfield practice?

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

What is the NPI number for Michael Clearfield?

The National Provider Identifier (NPI) for Michael Clearfield is 1689638561, a Type 1 (individual) record in the CMS NPPES registry.

Other providers at this practice address

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Georgia Allen Internal Medicine Physician · Vallejo, CA NPI 1508844796 Jay Shubrook Family Medicine Physician · Vallejo, CA NPI 1336179704 John Glover Neuromusculoskeletal Medicine & OMM Physician · Vallejo, CA NPI 1376674341 County of Solano Medical Specialty Clinic/Center · Vallejo, CA NPI 1275745580 County of Solano Non-Surgical Family Planning Clinic/Center · Vallejo, CA NPI 1528270832 Matthew Fagan Family Medicine Physician · Vallejo, CA NPI 1740488543 Tami Hendriksz Pediatrics Physician · Vallejo, CA NPI 1104099951 Philip Malouf Pediatrics Physician · Vallejo, CA NPI 1588827067

Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2013-03-26.