Sydney Guenther
NPI 1740038603 · Women's Health Nurse Practitioner · San Jose, CA
Sydney Guenther is a Women's Health Nurse Practitioner provider in San Jose, CA (NPI 1740038603).
Provider details
- NPI number
- 1740038603
- Entity type
- Individual
- Primary specialty
- Women's Health Nurse PractitionerPhysician Assistants & Advanced Practice Nursing Providers
- Sex
- Female
- Sole proprietor
- No
- License
- 95039490 (CA)
Specialties & taxonomies
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
2 yrs in NPPES registry
- Profile completeness38% of score
100% of core fields populated
- Practice footprint23% of score
2 documented practice locations
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
Additional practice locations (1)
- 20 Central AveLynn, MA 01901-1201Phone: (781) 581-3900
Registry dates
- Enumerated
- 2024-05-07
- Last updated
- 2026-05-21
- Certified
- 2026-05-21
Frequently asked questions
- What is Sydney Guenther's NPI number?
- Sydney Guenther's National Provider Identifier (NPI) is 1740038603, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Sydney Guenther's specialty?
- Sydney Guenther is listed in the NPPES registry with a primary specialty of Women's Health Nurse Practitioner (Physician Assistants & Advanced Practice Nursing Providers).
- Where is Sydney Guenther located?
- Sydney Guenther's practice location on file with NPPES is 5440 Thornwood Dr Ste G, San Jose, CA 95123-1217.
- What is Sydney Guenther's phone number?
- The practice phone number listed in the NPPES registry for Sydney Guenther is (408) 281-9777.
- Is Sydney Guenther's NPI active?
- Yes — Sydney Guenther's NPI (1740038603) is active in the NPPES registry as of the last update on 2026-05-21.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.