NPPES file of Aug 9, 2026

Gregory Michael Kotlarz, PH.D.

Clinical Psychologist · Royal Oak, MI

Gregory Michael Kotlarz, PH.D. is a clinical psychologist with a practice address in Royal Oak, Michigan, and NPI 1134160732, issued on Jun 8, 2006. Check the license (Michigan 6301006594, 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.

Record from CMS NPPES, file of Aug 9, 2026 · method · Verify with CMS →

NPPES recordNPPES file of Aug 9, 2026
1134160732
Name
Gregory Michael Kotlarz
Credential
PH.D.
Primary taxonomy
Clinical Psychologist 103TC0700X
License number
6301006594 MI
Self-reported in NPPES; status is on the state search
Practice location
221 S Main St, Royal Oak, MI 48067
Phone
(248) 398-6459
Enumerated
Jun 8, 2006
Record last updated
Jul 8, 2022
Entity
Type 1 · individual
Public record from CMS NPPES (open it on the CMS NPI Registry). A record is not a license: verify it with the state board.
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8 nearest clinical psychologist records → All 2,965 in Michigan → Look up another NPI →

Also registered at 221 S Main St

A shared address usually means a shared clinic or building; it does not show who employs whom.

  1. Jonathan Beard, PHDClinical Psychologist1417998972
  2. Kristy ByerlyAdult Health Nurse Practitioner1386024487
  3. Lisa Caffee, NPNurse Practitioner1548706807
  4. Elizabeth Cameron, APRN BC NPCAdult Health Nurse Practitioner1811930001
  5. Dawn Fleck, LISW,LICDCClinical Social Worker1073817110
  6. Theresa Fox, FNP-CNurse Practitioner1750855169

Verify Gregory Michael Kotlarz in five checks

  1. 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
  2. 2LicenseActive license and public ordersWhich Michigan board licenses this profession
    Search for license 6301006594    Check the board
  3. 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
  4. 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
  5. 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
Find the Michigan license search

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Gregory Michael Kotlarz among 2,965 clinical psychologist records in Michigan

Gregory Michael Kotlarz, 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 fileNo · 24% of these records are
  • Record last updated2022 · 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).

56 clinical psychologist records list a practice address in Royal Oak

They are 56 of the 3,887 NPPES records with a practice address in Royal Oak, 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 Royal Oak → Clinical Psychologist nationwide →

The 8 clinical psychologist records with the nearest ZIP codes

  1. Steven Abell, PH.D.Royal Oak, MI 480671124150594
  2. Kathy August, PSY.D.Royal Oak, MI 480671457381451
  3. Jonathan Beard, PHDRoyal Oak, MI 480671417998972
  4. Christine Cantrell, PH.D.Royal Oak, MI 480671134170376
  5. Robert Heidrich, PSY.D.Royal Oak, MI 480671467480764
  6. Sharon Jones, PH.D.Royal Oak, MI 480671710915186
  7. Sylvie Lombardo, PHDRoyal Oak, MI 480671649355868
  8. Thomas Mervak, PH.D.Royal Oak, MI 480671548373038

Common questions

What is Gregory Michael Kotlarz, PH.D.'s NPI number?

Gregory Michael Kotlarz, PH.D.'s National Provider Identifier (NPI) is 1134160732, issued on Jun 8, 2006. An NPI identifies a provider in billing; it is not a license.

Where is Gregory Michael Kotlarz, PH.D. located?

The NPPES record lists a practice address at 221 S Main St, Royal Oak, MI, 48067. Phone: (248) 398-6459. Providers update this record themselves, so call before visiting.

How can I verify Gregory Michael Kotlarz, PH.D.'s license?

NPPES lists Michigan license number 6301006594, 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.

Written with AI tools from the named public files; every figure is computed from those files (how it is made).

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.