Stephen Tseng, MD
NPI 1346328077 · Internal Medicine Physician · Ione, CA
Stephen Tseng, MD is a Internal Medicine Physician provider in Ione, CA (NPI 1346328077).
Provider details
- NPI number
- 1346328077
- Entity type
- Individual
- Primary specialty
- Internal Medicine PhysicianAllopathic & Osteopathic Physicians
- Credential
- MD
- Sex
- Male
- Sole proprietor
- No
- License
- A69139 (CA)
Specialties & taxonomies
Allopathic & Osteopathic Physicians
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
- 2006-11-01
- Last updated
- 2008-10-24
Frequently asked questions
- What is Stephen Tseng's NPI number?
- Stephen Tseng's National Provider Identifier (NPI) is 1346328077, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Stephen Tseng's specialty?
- Stephen Tseng is listed in the NPPES registry with a primary specialty of Internal Medicine Physician (Allopathic & Osteopathic Physicians).
- Where is Stephen Tseng located?
- Stephen Tseng's practice location on file with NPPES is 4001 Highway 104, Ione, CA 95640.
- What is Stephen Tseng's phone number?
- The practice phone number listed in the NPPES registry for Stephen Tseng is (209) 274-4911.
- Is Stephen Tseng's NPI active?
- Yes — Stephen Tseng's NPI (1346328077) is active in the NPPES registry as of the last update on 2008-10-24.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.