Brittany Margaret Ashlock, MD, PHD, MPH
Hospitalist Physician · Walnut Creek, CA
Brittany Margaret Ashlock, MD, PHD, MPH is a hospitalist physician with a practice address in Walnut Creek, California, and NPI 1952728099, issued on Mar 26, 2014. Check the license (California A139748, as entered in NPPES) on the Medical Board of California; the Medicare figures below come from public CMS files.
- Name
- Brittany Margaret Ashlock
- Credential
- MD, PHD, MPH
- Primary taxonomy
- Hospitalist Physician 208M00000X
- License number
- A139748 CA
Self-reported in NPPES; status is on the state search - Practice location
- 1425 S. Main St., Walnut Creek, CA 94553
- Phone
- (305) 332-1688
- Enumerated
- Mar 26, 2014
- Record last updated
- Feb 4, 2022
- Medicare enrollment
- Enrolled (PECOS I20170807003491); accepts Medicare assignment
- Medical or professional school
- University Of Miami, Lm Miller School Of Medicine, 2014
- Entity
- Type 1 · individual
8 nearest hospitalist physician records → All 3,099 in California → Look up another NPI →
Verify Brittany Margaret Ashlock in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMedical Board of California
Search for license A139748Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
Bills Medicare through one group practice
- Permanente Medical Group IncOakland, CA
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Brittany Margaret Ashlock among 3,099 hospitalist physician records in California
Brittany Margaret Ashlock, MD, PHD, MPH is one of 3,099 hospitalist physician records with a practice address in California. 90% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2014, is newer than 61% of them.
- NPI issued2014 · 61% of these records are older, 34% newer
- In a Medicare fileYes · 90% of these records are
- In the CMS Doctors and Clinicians fileYes · 81% of these records are
- Graduated2014 · median 2010 among the 2,505 with a school on file
- Record last updated2022 · 49% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 208M00000X and a California practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
68 hospitalist physician records list a practice address in Walnut Creek
They are 68 of the 6,170 NPPES records with a practice address in Walnut Creek, and 3,099 hospitalist physician records in California.
All 3,099 in California → Every provider in Walnut Creek → Hospitalist Physician nationwide →
The 8 hospitalist physician records with the nearest ZIP codes
- Mehrdad Mansouri, M.D., PH.D.Martinez, CA 945531376532747
- Jennifer Stanziale, MDMartinez, CA 945531215467543
- Alfort Santos, M.D.,R.NLafayette, CA 945491376731505
- Amir Behzad Razavi, M.D.Napa, CA 945581063457059
- Debra Trnavsky-Hobbs, M.D.Napa, CA 945581316990724
- Maria Ait Rais, M.D.Castro Valley, CA 945461811239304
- Oluwaseyi Balasire, M.D.Castro Valley, CA 945461003235243
- Mariam Beshai, MDCastro Valley, CA 945461447839956
Common questions
What is Brittany Margaret Ashlock, MD, PHD, MPH's NPI number?
Brittany Margaret Ashlock, MD, PHD, MPH's National Provider Identifier (NPI) is 1952728099, issued on Mar 26, 2014. An NPI identifies a provider in billing; it is not a license.
Where is Brittany Margaret Ashlock, MD, PHD, MPH located?
The NPPES record lists a practice address at 1425 S. Main St., Walnut Creek, CA, 94553. Phone: (305) 332-1688. Providers update this record themselves, so call before visiting.
How can I verify Brittany Margaret Ashlock, MD, PHD, MPH's license?
NPPES lists California license number A139748, as entered by the provider. Search the Medical Board of California at https://www.mbc.ca.gov/License-Verification/default.aspx. The NPPES record confirms identity only; the state search shows license status, expiration and public orders.
Source: CMS National Plan and Provider Enumeration System (NPPES), file of Aug 9, 2026 (NPPES files on CMS.gov); NUCC Health Care Provider Taxonomy. Medicare files from data.cms.gov. An NPI identifies who bills; it is not a license.
Figures on PlainDoctor are read from the federal files each page names (CMS NPPES, Medicare Part D, MIPS, Open Payments; the HHS-OIG exclusion list only as counts) and from Census population estimates, with the file date shown beside them. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error. Data current as of Aug 9, 2026.