Merrill Chandler, MD
NPI 1508847237 · Emergency Medicine Physician · Castro Valley, CA
Enrolled with Medicare as Practitioner - Emergency Medicine · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Merrill Chandler, MD is a Emergency Medicine Physician provider in Castro Valley, CA (NPI 1508847237).
Provider details
- NPI number
- 1508847237
- Entity type
- Individual
- Primary specialty
- Emergency Medicine PhysicianAllopathic & Osteopathic Physicians
- Credential
- MD
- Sex
- Male
- Sole proprietor
- Yes
- License
- G50134 (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
20 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
- 2005-11-09
- Last updated
- 2007-07-17
Frequently asked questions
- What is Merrill Chandler's NPI number?
- Merrill Chandler's National Provider Identifier (NPI) is 1508847237, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Merrill Chandler's specialty?
- Merrill Chandler is listed in the NPPES registry with a primary specialty of Emergency Medicine Physician (Allopathic & Osteopathic Physicians).
- Where is Merrill Chandler located?
- Merrill Chandler's practice location on file with NPPES is 20103 Lake Chabot Rd, Castro Valley, CA 94546-5341.
- What is Merrill Chandler's phone number?
- The practice phone number listed in the NPPES registry for Merrill Chandler is (209) 342-2300.
- Does Merrill Chandler accept Medicare?
- Merrill Chandler is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Merrill Chandler's NPI active?
- Yes — Merrill Chandler's NPI (1508847237) is active in the NPPES registry as of the last update on 2007-07-17.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.