Maeve O'Regan, MD
NPI 1871535203 · Internal Medicine Physician · Walnut Creek, CA
Enrolled with Medicare as Practitioner - Internal Medicine · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Maeve O'Regan, MD is a Internal Medicine Physician provider in Walnut Creek, CA (NPI 1871535203).
Provider details
- NPI number
- 1871535203
- Entity type
- Individual
- Primary specialty
- Internal Medicine PhysicianAllopathic & Osteopathic Physicians
- Credential
- MD
- Sex
- Female
- Sole proprietor
- No
- License
- A055743 (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
- 2006-06-11
- Last updated
- 2015-06-18
Frequently asked questions
- What is Maeve O'Regan's NPI number?
- Maeve O'Regan's National Provider Identifier (NPI) is 1871535203, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Maeve O'Regan's specialty?
- Maeve O'Regan is listed in the NPPES registry with a primary specialty of Internal Medicine Physician (Allopathic & Osteopathic Physicians).
- Where is Maeve O'Regan located?
- Maeve O'Regan's practice location on file with NPPES is 2621 Shadelands Drive, Walnut Creek, CA 94598.
- What is Maeve O'Regan's phone number?
- The practice phone number listed in the NPPES registry for Maeve O'Regan is (925) 947-0417.
- Does Maeve O'Regan accept Medicare?
- Maeve O'Regan is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Maeve O'Regan's NPI active?
- Yes — Maeve O'Regan's NPI (1871535203) is active in the NPPES registry as of the last update on 2015-06-18.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.