Karen Siu, NP
NPI 1225538762 · Nurse Practitioner · Mountain View, CA
Karen Siu, NP is a Nurse Practitioner provider in Mountain View, CA (NPI 1225538762).
Provider details
- NPI number
- 1225538762
- Entity type
- Individual
- Primary specialty
- Nurse PractitionerPhysician Assistants & Advanced Practice Nursing Providers
- Credential
- NP
- Sex
- Female
- Sole proprietor
- No
- License
- 95007908 (CA)
Specialties & taxonomies
Physician Assistants & Advanced Practice Nursing Providers
Physician Assistants & Advanced Practice Nursing Providers
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure38% of score
8 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
- 2018-02-20
- Last updated
- 2018-10-18
Frequently asked questions
- What is Karen Siu's NPI number?
- Karen Siu's National Provider Identifier (NPI) is 1225538762, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Karen Siu's specialty?
- Karen Siu is listed in the NPPES registry with a primary specialty of Nurse Practitioner (Physician Assistants & Advanced Practice Nursing Providers).
- Where is Karen Siu located?
- Karen Siu's practice location on file with NPPES is 701 E El Camino Real, Mountain View, CA 94040-2833.
- What is Karen Siu's phone number?
- The practice phone number listed in the NPPES registry for Karen Siu is (650) 934-7000.
- Is Karen Siu's NPI active?
- Yes — Karen Siu's NPI (1225538762) is active in the NPPES registry as of the last update on 2018-10-18.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.