David Hsieh, M.D.
NPI 1891919874 · Family Medicine Physician · Diamond Bar, CA
Enrolled with Medicare as Practitioner - Family Practice · source: CMS PECOS Public Provider Enrollment (2026.04.01)
David Hsieh, M.D. is a Family Medicine Physician provider in Diamond Bar, CA (NPI 1891919874).
Provider details
- NPI number
- 1891919874
- Entity type
- Individual
- Primary specialty
- Family Medicine PhysicianAllopathic & Osteopathic Physicians
- Credential
- M.D.
- Sex
- Male
- Sole proprietor
- Yes
- License
- A40716 (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
- 2007-04-12
- Last updated
- 2007-07-08
Frequently asked questions
- What is David Hsieh's NPI number?
- David Hsieh's National Provider Identifier (NPI) is 1891919874, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is David Hsieh's specialty?
- David Hsieh is listed in the NPPES registry with a primary specialty of Family Medicine Physician (Allopathic & Osteopathic Physicians).
- Where is David Hsieh located?
- David Hsieh's practice location on file with NPPES is 1142 S Diamond Bar Blvd, Diamond Bar, CA 91765-2203.
- What is David Hsieh's phone number?
- The practice phone number listed in the NPPES registry for David Hsieh is (909) 720-8122.
- Does David Hsieh accept Medicare?
- David Hsieh is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is David Hsieh's NPI active?
- Yes — David Hsieh's NPI (1891919874) is active in the NPPES registry as of the last update on 2007-07-08.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.