Lawrence Chan, M.D.
NPI 1669437380 · Specialist · Sunnyvale, CA
Enrolled with Medicare as Practitioner - Diagnostic Radiology · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Lawrence Chan, M.D. is a Specialist provider in Sunnyvale, CA (NPI 1669437380).
Provider details
- NPI number
- 1669437380
- Entity type
- Individual
- Primary specialty
- SpecialistOther Service Providers
- Credential
- M.D.
- Sex
- Male
- Sole proprietor
- Yes
- License
- A63513 (CA)
Specialties & taxonomies
Other Service Providers
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure33% of score
20 yrs in NPPES registry
- Profile completeness33% of score
100% of core fields populated
- Practice footprint20% of score
1 documented practice location
- 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.
$142 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
Registry dates
- Enumerated
- 2006-04-18
- Last updated
- 2010-01-15
Frequently asked questions
- What is Lawrence Chan's NPI number?
- Lawrence Chan's National Provider Identifier (NPI) is 1669437380, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Lawrence Chan's specialty?
- Lawrence Chan is listed in the NPPES registry with a primary specialty of Specialist (Other Service Providers).
- Where is Lawrence Chan located?
- Lawrence Chan's practice location on file with NPPES is 990 W Fremont Ave, Sunnyvale, CA 94087-3021.
- What is Lawrence Chan's phone number?
- The practice phone number listed in the NPPES registry for Lawrence Chan is (408) 738-0378.
- Does Lawrence Chan accept Medicare?
- Lawrence Chan is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Lawrence Chan's NPI active?
- Yes — Lawrence Chan's NPI (1669437380) is active in the NPPES registry as of the last update on 2010-01-15.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.