Bernadette Chiu, MD
NPI 1770233819 · Family Medicine Physician · Atwater, CA
Enrolled with Medicare as Practitioner - Family Practice · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Bernadette Chiu, MD is a Family Medicine Physician provider in Atwater, CA (NPI 1770233819).
Provider details
- NPI number
- 1770233819
- Entity type
- Individual
- Primary specialty
- Family Medicine PhysicianAllopathic & Osteopathic Physicians
- Credential
- MD
- Sex
- Female
- Sole proprietor
- Yes
Specialties & taxonomies
Allopathic & Osteopathic Physicians
Student, Health Care
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure38% of score
4 yrs in NPPES registry
- Profile completeness38% of score
83% of core fields populated
- Practice footprint23% of score
3 documented practice locations
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
Additional practice locations (2)
- 315 Mercy Ave Ste 301Merced, CA 95340-8367Phone: (209) 564-3513Fax: (209) 564-3598
- 127 W El Portal DrMerced, CA 95348-2853Phone: (209) 723-3704Fax: (209) 723-0272
Registry dates
- Enumerated
- 2022-03-23
- Last updated
- 2025-08-20
- Certified
- 2025-08-20
Frequently asked questions
- What is Bernadette Chiu's NPI number?
- Bernadette Chiu's National Provider Identifier (NPI) is 1770233819, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Bernadette Chiu's specialty?
- Bernadette Chiu is listed in the NPPES registry with a primary specialty of Family Medicine Physician (Allopathic & Osteopathic Physicians).
- Where is Bernadette Chiu located?
- Bernadette Chiu's practice location on file with NPPES is 1675 Shaffer Rd, Atwater, CA 95301-4456.
- What is Bernadette Chiu's phone number?
- The practice phone number listed in the NPPES registry for Bernadette Chiu is (209) 383-5500.
- Does Bernadette Chiu accept Medicare?
- Bernadette Chiu is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Bernadette Chiu's NPI active?
- Yes — Bernadette Chiu's NPI (1770233819) is active in the NPPES registry as of the last update on 2025-08-20.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.