Gregory Gene McGowan, M.D.
Psychiatry Physician · Patton, CA
Gregory Gene McGowan, M.D. is a psychiatry physician with a practice address in Patton, California, and NPI 1073706636, issued on Aug 27, 2007. Check the license (California A89593, as entered in NPPES) on the Medical Board of California; the Medicare figures below come from public CMS files.
- Name
- Gregory Gene McGowan
- Credential
- M.D.
- Primary taxonomy
- Psychiatry Physician 2084P0800X
- License number
- A89593 CA
Self-reported in NPPES; status is on the state search - Practice location
- 3102 E Highland Ave, Patton, CA 92369
- Phone
- (909) 425-7679
- Enumerated
- Aug 27, 2007
- Record last updated
- May 9, 2014 (not updated in 12 years: call before relying on the address or phone)
- Fax
- (909) 425-6635
- Medicare enrollment
- Enrolled (PECOS I20091209000362); accepts Medicare assignment
- Medical or professional school
- Jc Edwards School Of Medicine, Marshall University, 2002
- Telehealth
- Offers telehealth (CMS)
- Entity
- Type 1 · individual
8 nearest psychiatry physician records → All 8,673 in California → Look up another NPI →
Also registered at 3102 E Highland Ave
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Vanessa Acosta Michel, LCSW, MSWClinical Social Worker1386114544
- Maria Aparcero Suero, PH.D.Clinical Psychologist1265257885
- Shannon Bader, PHDClinical Psychologist1316266281
- Jason Bailie, PH.D.Clinical Neuropsychologist1932494432
- Emily BalandraStudent in an Organized Health Care Education/Training Program1427427319
- Rainer Bansuan, M.D.Adolescent Medicine (Family Medicine) Physician1336258037
Verify Gregory Gene McGowan in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMedical Board of California
Search for license A89593Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
94% fewer Medicare Part D claims than the average psychiatry physician in 2024
58 Medicare Part D claims, against an average of 1,000 among the 35,054 providers of this specialty who prescribed in Part D.
Most prescribed
- Diazepam13 claims
Source: CMS Medicare Part D Prescribers by Provider and Drug, 2024 (data.cms.gov). Part D covers prescriptions for Medicare patients only; drugs with fewer than 11 claims are not published.
Bills Medicare through one group practice
- Ehab Yacoub MD IncGardena, CA
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Gregory Gene McGowan among 8,673 psychiatry physician records in California
Gregory Gene McGowan, M.D. is one of 8,673 psychiatry physician records with a practice address in California. 67% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2007, is newer than 33% of them.
- NPI issued2007 · 33% of these records are older, 48% newer
- In a Medicare fileYes · 67% of these records are
- In the CMS Doctors and Clinicians fileYes · 38% of these records are
- Graduated2002 · median 2005 among the 3,295 with a school on file
- Record last updated2014 · 54% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 2084P0800X and a California practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
79 psychiatry physician records list a practice address in Patton
They are 79 of the 339 NPPES records with a practice address in Patton, and 8,673 psychiatry physician records in California.
All 8,673 in California → Every provider in Patton → Psychiatry Physician nationwide →
The 8 psychiatry physician records with the nearest ZIP codes
- Tim Alder, M.D.Patton, CA 923691619929023
- Ai Li Arias, M.D.Patton, CA 923691134171598
- Roger Cabansag, M.D.Patton, CA 923691063464352
- Edward Case, MDPatton, CA 923691407808785
- Manuel Desagun, MDPatton, CA 923691518919802
- Ron Foo, MDPatton, CA 923691578515813
- Greta Herbes, M.D.Patton, CA 923691619929171
- Joshua Horsley, M.D.Patton, CA 923691316999733
Common questions
What is Gregory Gene McGowan, M.D.'s NPI number?
Gregory Gene McGowan, M.D.'s National Provider Identifier (NPI) is 1073706636, issued on Aug 27, 2007. An NPI identifies a provider in billing; it is not a license.
Where is Gregory Gene McGowan, M.D. located?
The NPPES record lists a practice address at 3102 E Highland Ave, Patton, CA, 92369. Phone: (909) 425-7679. Providers update this record themselves, so call before visiting.
How can I verify Gregory Gene McGowan, M.D.'s license?
NPPES lists California license number A89593, as entered by the provider. Search the Medical Board of California at https://www.mbc.ca.gov/License-Verification/default.aspx. The NPPES record confirms identity only; the state search shows license status, expiration and public orders.
How much does Gregory Gene McGowan, M.D. prescribe under Medicare Part D?
In 2024, Gregory Gene McGowan, M.D. had 58 Medicare Part D claims; the average among psychiatry physician prescribers was 1,000. Part D covers Medicare prescriptions 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. Medicare files from data.cms.gov. 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.