Ralph Lloyd Olson, PH.D.
Clinical Psychologist · Marquette, MI
Ralph Lloyd Olson, PH.D. is a clinical psychologist with a practice address in Marquette, Michigan, and NPI 1790708881, issued on Jul 26, 2006. Check the license (Michigan 6301008509, as entered in NPPES) with the Michigan board that licenses this profession; the federal record below is the public data PlainDoctor holds for this provider.
- Name
- Ralph Lloyd Olson
- Credential
- PH.D.
- Primary taxonomy
- Clinical Psychologist 103TC0700X
- License number
- 6301008509 MI
Self-reported in NPPES; status is on the state search - Practice location
- 220 W Washington St, Marquette, MI 49855
- Phone
- (906) 225-5462
- Enumerated
- Jul 26, 2006
- Record last updated
- Jan 3, 2011 (not updated in 15 years: call before relying on the address or phone)
- Fax
- (906) 225-5462
- Medicare enrollment
- Enrolled (PECOS I20090422000271); accepts Medicare assignment
- Entity
- Type 1 · individual
8 nearest clinical psychologist records → All 2,965 in Michigan → Look up another NPI →
Also registered at 220 W Washington St
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Sean FitzpatrickMental Health Counselor1730460072
Verify Ralph Lloyd Olson in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersWhich Michigan board licenses this profession
Search for license 6301008509Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
Ralph Lloyd Olson among 2,965 clinical psychologist records in Michigan
Ralph Lloyd Olson, PH.D. is one of 2,965 clinical psychologist records with a practice address in Michigan. 13% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does not. Its NPI, issued in 2006, is newer than 2% of them.
- NPI issued2006 · 2% of these records are older, 79% newer
- In a Medicare fileNo · 13% of these records are
- In the CMS Doctors and Clinicians fileYes · 24% of these records are
- Graduated1990 · median 2005 among the 697 with a school on file
- Record last updated2011 · 62% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 103TC0700X and a Michigan practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
17 clinical psychologist records list a practice address in Marquette
They are 17 of the 1,391 NPPES records with a practice address in Marquette, and 2,965 clinical psychologist records in Michigan. No Medicare prescribing, quality score, industry payment or hospital affiliation is published for this NPI.
All 2,965 in Michigan → Every provider in Marquette → Clinical Psychologist nationwide →
The 8 clinical psychologist records with the nearest ZIP codes
- Heather Busser-Demarte, PSYDMarquette, MI 498551497034375
- Karl Hill, PSYDMarquette, MI 498551952385247
- Daniel Holdwick, PHDMarquette, MI 498551710032685
- Gregory Jones, PHDMarquette, MI 498551245214451
- Jonathan Kniskern, PH.D.Marquette, MI 498551679620413
- Kent Koehn, PHDMarquette, MI 498551417930066
- Margaret Macdevitt, PHDMarquette, MI 498551689636151
- Catherine Medick, LLPMarquette, MI 498551538734074
Common questions
What is Ralph Lloyd Olson, PH.D.'s NPI number?
Ralph Lloyd Olson, PH.D.'s National Provider Identifier (NPI) is 1790708881, issued on Jul 26, 2006. An NPI identifies a provider in billing; it is not a license.
Where is Ralph Lloyd Olson, PH.D. located?
The NPPES record lists a practice address at 220 W Washington St, Marquette, MI, 49855. Phone: (906) 225-5462. Providers update this record themselves, so call before visiting.
How can I verify Ralph Lloyd Olson, PH.D.'s license?
NPPES lists Michigan license number 6301008509, as entered by the provider. Search the Michigan board that licenses this profession; the NPPES record confirms identity only.
Source: CMS National Plan and Provider Enumeration System (NPPES), file of Aug 9, 2026 (NPPES files on CMS.gov); NUCC Health Care Provider Taxonomy. An NPI identifies who bills; it is not a license.
Figures on PlainDoctor are read from the federal files each page names (CMS NPPES, Medicare Part D, MIPS, Open Payments; the HHS-OIG exclusion list only as counts) and from Census population estimates, with the file date shown beside them. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error. Data current as of Aug 9, 2026.