Bay Infectious Disease
NPI 1215137633 · Infectious Disease Physician · Orinda, CA
Enrolled with Medicare as Part B Supplier - Clinic/Group Practice · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Bay Infectious Disease is a Infectious Disease Physician organization in Orinda, CA (NPI 1215137633).
Provider details
- NPI number
- 1215137633
- Entity type
- Organization
- Primary specialty
- Infectious Disease PhysicianAllopathic & Osteopathic Physicians
- Organization subpart
- No
- Authorized official
- Yenjean Hwang, Partner(925) 254-3805
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
18 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)
- Other name
- Bay Infectious Disease Medical Group
Registry dates
- Enumerated
- 2007-07-24
- Last updated
- 2013-01-07
Frequently asked questions
- What is Bay Infectious Disease's NPI number?
- Bay Infectious Disease's National Provider Identifier (NPI) is 1215137633, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What type of organization is Bay Infectious Disease?
- Bay Infectious Disease is classified in the NPPES registry as Infectious Disease Physician (Allopathic & Osteopathic Physicians).
- Where is Bay Infectious Disease located?
- Bay Infectious Disease's practice location on file with NPPES is 1 Country Club Plz, Orinda, CA 94563-2308.
- What is Bay Infectious Disease's phone number?
- The practice phone number listed in the NPPES registry for Bay Infectious Disease is (925) 254-3805.
- Does Bay Infectious Disease accept Medicare?
- Bay Infectious Disease 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 Bay Infectious Disease?
- The authorized official listed on Bay Infectious Disease's NPPES record is Yenjean Hwang, Partner. The authorized official registers and maintains the organization's NPI and is not necessarily its owner.
- Is Bay Infectious Disease's NPI active?
- Yes — Bay Infectious Disease's NPI (1215137633) is active in the NPPES registry as of the last update on 2013-01-07.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.