Lyn Lazar, M.D.
NPI 1427072396 · Internal Medicine Physician · Livermore, CA
Enrolled with Medicare as Order and Referring Only - Internal Medicine · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Lyn Lazar, M.D. is a Internal Medicine Physician provider in Livermore, CA (NPI 1427072396).
Provider details
- NPI number
- 1427072396
- Entity type
- Individual
- Primary specialty
- Internal Medicine PhysicianAllopathic & Osteopathic Physicians
- Credential
- M.D.
- Sex
- Female
- Sole proprietor
- No
- License
- G062094 (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
- 2006-07-26
- Last updated
- 2007-07-08
Frequently asked questions
- What is Lyn Lazar's NPI number?
- Lyn Lazar's National Provider Identifier (NPI) is 1427072396, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Lyn Lazar's specialty?
- Lyn Lazar is listed in the NPPES registry with a primary specialty of Internal Medicine Physician (Allopathic & Osteopathic Physicians).
- Where is Lyn Lazar located?
- Lyn Lazar's practice location on file with NPPES is 4951 Arroyo Rd, Livermore, CA 94550-9650.
- What is Lyn Lazar's phone number?
- The practice phone number listed in the NPPES registry for Lyn Lazar is (925) 373-4700.
- Does Lyn Lazar accept Medicare?
- Lyn Lazar is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Lyn Lazar's NPI active?
- Yes — Lyn Lazar's NPI (1427072396) 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.