Mr. Michael W Harmon, MD

Mr. Michael W Harmon is a Diagnostic Ultrasound Physician provider (Radiology) practicing in Eureka, CA, registered in the NPPES registry with NPI 1477551216 since 2005. The credential MD stands for Doctor of Medicine.

✓ Active NPI ✓ Valid NPI checksum Sole proprietor

NPI	1477551216
Entity type	Individual (Type 1)
Name	Mr. Michael W Harmon
Credential	MD
Sex	Male
Practice address	Eureka, CA, 95501
Phone	7072694229
Fax	7072693849
Enumeration date	2005-07-13
Last updated in NPPES	2012-07-19

Street address withheld — NPPES sole-proprietor addresses can be home addresses. See our data policy.

Taxonomy & licenses

Taxonomy code	Specialty	Primary	License	State
2085U0001X	Diagnostic Ultrasound Physician	Primary	G71219	CA

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
G71219	Other	CA	LICENSE
GR0088900	Medicaid	CA	—

Copy-ready billing details

Provider: Michael Harmon, MD
NPI: 1477551216
Taxonomy: 2085U0001X (Diagnostic Ultrasound Physician)
Address: Eureka, CA, 95501

Other providers at this practice address

NPI	Name	Type	Specialty	Location
1417957168	William Sageman	Individual	Critical Care Medicine (Internal Medicine) Physician	Eureka, CA
1598746950	Lei Winget	Individual	Family Medicine Physician	Eureka, CA
1609858950	St. Joseph Health Northern California, LLC	Organization	General Acute Care Hospital	Eureka, CA
1497737639	Timothy Dalsaso	Individual	Diagnostic Radiology Physician	Eureka, CA
1518937838	Elie Richa	Individual	Hematology & Oncology Physician	Eureka, CA
1497716781	Douglas Kelly	Individual	Radiation Oncology Physician	Eureka, CA
1669434452	Kay Duefrene	Individual	Emergency Medicine Physician	Eureka, CA
1245292085	Marcelle Mahan	Individual	General Practice Physician	Eureka, CA

Verify this record

Cross-check NPI 1477551216 against the authoritative CMS record: view Mr. Michael W Harmon on the official NPPES registry .

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 or validate an NPI number.

Frequently asked questions

What is the NPI number for Michael Harmon?

The National Provider Identifier (NPI) for Michael Harmon is 1477551216, a Type 1 (individual) record in the CMS NPPES registry.

Where does Michael Harmon practice?

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

Source: CMS NPPES (public data). Snapshot 2026-07-11. Provider record last updated 2012-07-19.