Premier Hospitalist Group Inc
NPI 1619216553 · Hospitalist Physician · Upland, CA
Enrolled with Medicare as Part B Supplier - Clinic/Group Practice · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Premier Hospitalist Group Inc is a Hospitalist Physician organization in Upland, CA (NPI 1619216553).
Provider details
- NPI number
- 1619216553
- Entity type
- Organization
- Primary specialty
- Hospitalist PhysicianAllopathic & Osteopathic Physicians
- Organization subpart
- No
- Authorized official
- Ythanh Nguyen, President(909) 579-6753
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
13 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
Other names (DBA / former)
- Doing business as
- Premier Hospitalist Group of California
- Doing business as
- Premier Hospitalist Group of California
Registry dates
- Enumerated
- 2013-02-13
- Last updated
- 2019-07-19
Frequently asked questions
- What is Premier Hospitalist Group Inc's NPI number?
- Premier Hospitalist Group Inc's National Provider Identifier (NPI) is 1619216553, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What type of organization is Premier Hospitalist Group Inc?
- Premier Hospitalist Group Inc is classified in the NPPES registry as Hospitalist Physician (Allopathic & Osteopathic Physicians).
- Where is Premier Hospitalist Group Inc located?
- Premier Hospitalist Group Inc's practice location on file with NPPES is 901 San Bernardino Rd, Upland, CA 91786-4912.
- What is Premier Hospitalist Group Inc's phone number?
- The practice phone number listed in the NPPES registry for Premier Hospitalist Group Inc is (562) 236-3432.
- Does Premier Hospitalist Group Inc accept Medicare?
- Premier Hospitalist Group Inc is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Who is the authorized official for Premier Hospitalist Group Inc?
- The authorized official listed on Premier Hospitalist Group Inc's NPPES record is Ythanh Nguyen, President. The authorized official registers and maintains the organization's NPI and is not necessarily its owner.
- Is Premier Hospitalist Group Inc's NPI active?
- Yes — Premier Hospitalist Group Inc's NPI (1619216553) is active in the NPPES registry as of the last update on 2019-07-19.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.