Gregory T. Whitman, M.D.
Neurology Physician · Irvine, CA
Gregory T. Whitman, M.D. is a neurology physician with a practice address in Irvine, California, and NPI 1356403851, issued on Dec 14, 2006. Check the license on the Medical Board of California; the federal record below is the public data PlainDoctor holds for this provider.
- Name
- Gregory T. Whitman
- Credential
- M.D.
- Primary taxonomy
- Neurology Physician 2084N0400X
- License number
- 153659 MA
Self-reported in NPPES; status is on the state search - Practice location
- 16405 Sand Canyon Ave Ste 220, Irvine, CA 92618
- Phone
- (949) 336-8150
- Enumerated
- Dec 14, 2006
- Record last updated
- Oct 3, 2018 (not updated in 8 years: call before relying on the address or phone)
- Fax
- (949) 727-7016
- Entity
- Type 1 · individual
8 nearest neurology physician records → All 2,339 in California → Look up another NPI →
Also registered at 16405 Sand Canyon Ave Ste 220
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Lauren BennettClinical Neuropsychologist1811426125
- Melvin Castillo, M.A.Student in an Organized Health Care Education/Training Program1043148240
- Bruce Cleeremans, MDNeurology Physician1205042249
- Michelle McDonnell, PHDClinical Neuropsychologist1770248809
- Ruth Morin, PHDClinical Psychologist1992366314
Verify Gregory T. Whitman in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMedical Board of CaliforniaCheck the board
- 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
Gregory T. Whitman among 2,339 neurology physician records in California
Gregory T. Whitman, M.D. is one of 2,339 neurology physician records with a practice address in California. 81% 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 4% of them.
- NPI issued2006 · 4% of these records are older, 59% newer
- In a Medicare fileNo · 81% of these records are
- In the CMS Doctors and Clinicians fileNo · 70% of these records are
- Record last updated2018 · 55% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 2084N0400X and a California practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
Neurology Physician providers in California
There are 2,339 neurology physician records in California. No Medicare prescribing, quality score, industry payment or hospital affiliation is published for this NPI.
All 2,339 in California → Every provider in Irvine → Neurology Physician nationwide →
The 8 neurology physician records with the nearest ZIP codes
- Bruce Cleeremans, MDIrvine, CA 926181205042249
- Parissa Hagh, MDIrvine, CA 926181922175835
- Elham Jafarimojarrad, M.D.Irvine, CA 926181356501084
- Dhiraj Jeyanandarajan, M.D.Irvine, CA 926181154547719
- Grace Kao, MDIrvine, CA 926181205934312
- Kristin Lueck, MDIrvine, CA 926181710938808
- Cattien Phan, DOIrvine, CA 926181992383525
- Sandeep Thakkar, D.O.Irvine, CA 926181740454586
Common questions
What is Gregory T. Whitman, M.D.'s NPI number?
Gregory T. Whitman, M.D.'s National Provider Identifier (NPI) is 1356403851, issued on Dec 14, 2006. An NPI identifies a provider in billing; it is not a license.
Where is Gregory T. Whitman, M.D. located?
The NPPES record lists a practice address at 16405 Sand Canyon Ave Ste 220, Irvine, CA, 92618. Phone: (949) 336-8150. Providers update this record themselves, so call before visiting.
How can I verify Gregory T. Whitman, M.D.'s license?
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.
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.