Gregory J Withers MD Inc a Medical Corp
NPI 1619020484 · Neurological Surgery Physician · Arcadia, CA
Gregory J Withers MD Inc a Medical Corp is a Neurological Surgery Physician organization in Arcadia, CA (NPI 1619020484).
Provider details
- NPI number
- 1619020484
- Entity type
- Organization
- Primary specialty
- Neurological Surgery PhysicianAllopathic & Osteopathic Physicians
- Organization subpart
- No
- Authorized official
- Gregory Withers, President(626) 821-3440
- License
- G27800 (CA)
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
- 2007-01-18
- Last updated
- 2010-12-08
Frequently asked questions
- What is Gregory J Withers MD Inc a Medical Corp's NPI number?
- Gregory J Withers MD Inc a Medical Corp's National Provider Identifier (NPI) is 1619020484, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What type of organization is Gregory J Withers MD Inc a Medical Corp?
- Gregory J Withers MD Inc a Medical Corp is classified in the NPPES registry as Neurological Surgery Physician (Allopathic & Osteopathic Physicians).
- Where is Gregory J Withers MD Inc a Medical Corp located?
- Gregory J Withers MD Inc a Medical Corp's practice location on file with NPPES is 301 W Huntington Dr, Arcadia, CA 91007-3462.
- What is Gregory J Withers MD Inc a Medical Corp's phone number?
- The practice phone number listed in the NPPES registry for Gregory J Withers MD Inc a Medical Corp is (626) 821-3440.
- Who is the authorized official for Gregory J Withers MD Inc a Medical Corp?
- The authorized official listed on Gregory J Withers MD Inc a Medical Corp's NPPES record is Gregory Withers, President. The authorized official registers and maintains the organization's NPI and is not necessarily its owner.
- Is Gregory J Withers MD Inc a Medical Corp's NPI active?
- Yes — Gregory J Withers MD Inc a Medical Corp's NPI (1619020484) is active in the NPPES registry as of the last update on 2010-12-08.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.