Gregory Whitman, M.D.
NPI 1356403851 · Neurology Physician · Irvine, CA
Enrolled with Medicare as Practitioner - Neurology · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Gregory Whitman, M.D. is a Neurology Physician provider in Irvine, CA (NPI 1356403851).
Provider details
- NPI number
- 1356403851
- Entity type
- Individual
- Primary specialty
- Neurology PhysicianAllopathic & Osteopathic Physicians
- Credential
- M.D.
- Sex
- Male
- Sole proprietor
- No
- License
- 153659 (MA)
Specialties & taxonomies
Allopathic & Osteopathic Physicians
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure38% of score
19 yrs in NPPES registry
- Profile completeness38% of score
100% of core fields populated
- Practice footprint23% of score
1 documented practice location
Signals a provider has no public data for (e.g. Medicare claims) are left out of the score entirely — never counted as zero — so providers without that data are not penalized. See the full formula and weights in our methodology.
Practice location
Mailing address
Registry dates
- Enumerated
- 2006-12-14
- Last updated
- 2018-10-03
Frequently asked questions
- What is Gregory Whitman's NPI number?
- Gregory Whitman's National Provider Identifier (NPI) is 1356403851, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Gregory Whitman's specialty?
- Gregory Whitman is listed in the NPPES registry with a primary specialty of Neurology Physician (Allopathic & Osteopathic Physicians).
- Where is Gregory Whitman located?
- Gregory Whitman's practice location on file with NPPES is 16405 Sand Canyon Ave Ste 220, Irvine, CA 92618-3787.
- What is Gregory Whitman's phone number?
- The practice phone number listed in the NPPES registry for Gregory Whitman is (949) 336-8150.
- Does Gregory Whitman accept Medicare?
- Gregory Whitman is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Gregory Whitman's NPI active?
- Yes — Gregory Whitman's NPI (1356403851) is active in the NPPES registry as of the last update on 2018-10-03.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.