Internal Medicine Medical Group
NPI 1164625588 · Endocrinology, Diabetes & Metabolism Physician · Fontana, CA
Internal Medicine Medical Group is a Endocrinology, Diabetes & Metabolism Physician organization in Fontana, CA (NPI 1164625588).
Provider details
- NPI number
- 1164625588
- Entity type
- Organization
- Primary specialty
- Endocrinology, Diabetes & Metabolism PhysicianAllopathic & Osteopathic Physicians
- Organization subpart
- No
- Authorized official
- Adrienne Walker, Contracts Manager(909) 398-1550
Specialties & taxonomies
Allopathic & Osteopathic Physicians
- Internal Medicine Physician207R00000X
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
- 2007-06-06
- Last updated
- 2025-09-11
Frequently asked questions
- What is Internal Medicine Medical Group's NPI number?
- Internal Medicine Medical Group's National Provider Identifier (NPI) is 1164625588, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What type of organization is Internal Medicine Medical Group?
- Internal Medicine Medical Group is classified in the NPPES registry as Endocrinology, Diabetes & Metabolism Physician (Allopathic & Osteopathic Physicians).
- Where is Internal Medicine Medical Group located?
- Internal Medicine Medical Group's practice location on file with NPPES is 16465 Sierra Lakes Parkway, Fontana, CA 92336-1242.
- What is Internal Medicine Medical Group's phone number?
- The practice phone number listed in the NPPES registry for Internal Medicine Medical Group is (909) 770-8640.
- Who is the authorized official for Internal Medicine Medical Group?
- The authorized official listed on Internal Medicine Medical Group's NPPES record is Adrienne Walker, Contracts Manager. The authorized official registers and maintains the organization's NPI and is not necessarily its owner.
- Is Internal Medicine Medical Group's NPI active?
- Yes — Internal Medicine Medical Group's NPI (1164625588) is active in the NPPES registry as of the last update on 2025-09-11.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.