Lynn Westphal, MD
NPI 1134269723 · Reproductive Endocrinology Physician · Los Altos, CA
Lynn Westphal, MD is a Reproductive Endocrinology Physician provider in Los Altos, CA (NPI 1134269723).
Provider details
- NPI number
- 1134269723
- Entity type
- Individual
- Primary specialty
- Reproductive Endocrinology PhysicianAllopathic & Osteopathic Physicians
- Credential
- MD
- Sex
- Female
- Sole proprietor
- No
- License
- CDRH.0066417 (CO)
Specialties & taxonomies
Allopathic & Osteopathic Physicians
Allopathic & Osteopathic Physicians
Allopathic & Osteopathic Physicians
Allopathic & Osteopathic Physicians
Allopathic & Osteopathic Physicians
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure33% of score
19 yrs in NPPES registry
- Profile completeness33% of score
100% of core fields populated
- Practice footprint20% of score
36 documented practice locations
- Open Payments transparency13% of score
Has Open Payments disclosures (2024)
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.
Transparency — industry payments
Based on CMS Open Payments, 2024; not all care is captured.
$205 across 5 records (Open Payments 2024)
Open Payments discloses payments and transfers of value (meals, travel, consulting, research, royalties) from drug and device makers to providers. This is a transparency signal, not a verdict — such payments are legal and common, and their presence is neither an endorsement nor a criticism. Source: CMS Open Payments, program year 2024.
Practice location
Mailing address
Additional practice locations (35)
- 2203 S Promenade Blvd Ste 5185Rogers, AR 72758-8722Phone: (479) 480-7200
- 4150 Regents Park Row Ste 321La Jolla, CA 92037-9124Phone: (619) 673-8658
- 4321 Birch St Ste 100Newport Beach, CA 92660-1940Phone: (949) 432-7438
- 88 Sutter StSan Francisco, CA 94104-4900Phone: (628) 777-7064
- 500 Broadway Ste 7Santa Monica, CA 90401-2988Phone: (323) 410-1291
- 1700 N Main StWalnut Creek, CA 94596-4105Phone: (925) 322-2115
- 220 Josephine StDenver, CO 80206-4750Phone: (720) 370-5671
- 1111 19th St Nw Ste 104Washington, DC 20036-3619Phone: (202) 301-3595
- 1530 Celebration Blvd Ste 200Celebration, FL 34747-5165Phone: (407) 745-1669
Registry dates
- Enumerated
- 2007-02-06
- Last updated
- 2024-05-23
- Certified
- 2024-05-17
Frequently asked questions
- What is Lynn Westphal's NPI number?
- Lynn Westphal's National Provider Identifier (NPI) is 1134269723, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Lynn Westphal's specialty?
- Lynn Westphal is listed in the NPPES registry with a primary specialty of Reproductive Endocrinology Physician (Allopathic & Osteopathic Physicians).
- Where is Lynn Westphal located?
- Lynn Westphal's practice location on file with NPPES is 4756 El Camino Real, Los Altos, CA 94022-1330.
- What is Lynn Westphal's phone number?
- The practice phone number listed in the NPPES registry for Lynn Westphal is (650) 445-4724.
- Is Lynn Westphal's NPI active?
- Yes — Lynn Westphal's NPI (1134269723) is active in the NPPES registry as of the last update on 2024-05-23.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.