Donald Siao, MD, a Medical Corporation
NPI 1578766002 · Family Medicine Physician · San Jose, CA
Donald Siao, MD, a Medical Corporation is a Family Medicine Physician organization in San Jose, CA (NPI 1578766002).
Provider details
- NPI number
- 1578766002
- Entity type
- Organization
- Primary specialty
- Family Medicine PhysicianAllopathic & Osteopathic Physicians
- Organization subpart
- No
- Authorized official
- Donald Siao, Ceo(408) 223-7771
- License
- G73395 (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
- 2007-06-11
- Last updated
- 2012-12-14
Frequently asked questions
- What is Donald Siao, MD, a Medical Corporation's NPI number?
- Donald Siao, MD, a Medical Corporation's National Provider Identifier (NPI) is 1578766002, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What type of organization is Donald Siao, MD, a Medical Corporation?
- Donald Siao, MD, a Medical Corporation is classified in the NPPES registry as Family Medicine Physician (Allopathic & Osteopathic Physicians).
- Where is Donald Siao, MD, a Medical Corporation located?
- Donald Siao, MD, a Medical Corporation's practice location on file with NPPES is 2690 S White Rd, San Jose, CA 95148-2076.
- What is Donald Siao, MD, a Medical Corporation's phone number?
- The practice phone number listed in the NPPES registry for Donald Siao, MD, a Medical Corporation is (408) 223-7771.
- Who is the authorized official for Donald Siao, MD, a Medical Corporation?
- The authorized official listed on Donald Siao, MD, a Medical Corporation's NPPES record is Donald Siao, Ceo. The authorized official registers and maintains the organization's NPI and is not necessarily its owner.
- Is Donald Siao, MD, a Medical Corporation's NPI active?
- Yes — Donald Siao, MD, a Medical Corporation's NPI (1578766002) is active in the NPPES registry as of the last update on 2012-12-14.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.