Diane Chau, MD
NPI 1780609834 · Internal Medicine Physician · Long Beach, CA
Enrolled with Medicare as Practitioner - Geriatric Medicine · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Diane Chau, MD is a Internal Medicine Physician provider in Long Beach, CA (NPI 1780609834).
Provider details
- NPI number
- 1780609834
- Entity type
- Individual
- Primary specialty
- Internal Medicine PhysicianAllopathic & Osteopathic Physicians
- Credential
- MD
- Sex
- Female
- Sole proprietor
- No
- License
- 9807 (HI)
Specialties & taxonomies
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
2 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.
$124 across 1 record (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 (1)
- 10666 N Torrey Pines RdLa Jolla, CA 92037-1027Phone: (858) 554-6158
Registry dates
- Enumerated
- 2006-07-12
- Last updated
- 2023-08-24
- Certified
- 2023-08-24
Frequently asked questions
- What is Diane Chau's NPI number?
- Diane Chau's National Provider Identifier (NPI) is 1780609834, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Diane Chau's specialty?
- Diane Chau is listed in the NPPES registry with a primary specialty of Internal Medicine Physician (Allopathic & Osteopathic Physicians).
- Where is Diane Chau located?
- Diane Chau's practice location on file with NPPES is 200 Oceangate Ste 100, Long Beach, CA 90802-4317.
- What is Diane Chau's phone number?
- The practice phone number listed in the NPPES registry for Diane Chau is (888) 562-5442.
- Does Diane Chau accept Medicare?
- Diane Chau is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Diane Chau's NPI active?
- Yes — Diane Chau's NPI (1780609834) is active in the NPPES registry as of the last update on 2023-08-24.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.