Rebecca A. Parish, M.D.
Internal Medicine Physician · Walnut Creek, CA
Rebecca A. Parish, M.D. is an internal medicine physician with a practice address in Walnut Creek, California, and NPI 1871655035, issued on Dec 14, 2006. Check the license (California A98073, as entered in NPPES) on the Medical Board of California; the Medicare figures below come from public CMS files.
- Name
- Rebecca A. Parish
- Credential
- M.D.
- Primary taxonomy
- Internal Medicine Physician 207R00000X
- License number
- A98073 CA
Self-reported in NPPES; status is on the state search - Practice location
- 1450 Treat Blvd, Walnut Creek, CA 94597
- Phone
- (925) 296-9740
- Enumerated
- Dec 14, 2006
- Record last updated
- Apr 2, 2014 (not updated in 12 years: call before relying on the address or phone)
- Fax
- (925) 296-9062
- Medicaid ID
- 00A980730 CA
- Entity
- Type 1 · individual
8 nearest internal medicine physician records → All 17,696 in California → Look up another NPI →
Also registered at 1450 Treat Blvd
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Lauren Ables, D.O.Family Medicine Physician1710413299
- Andrea Agcaoili, D.O.Family Medicine Physician1265775035
- Sonal Aggarwal, MDFamily Medicine Physician1336336411
- Deborah Arce, M.D.Internal Medicine Physician1841215605
- Cynthia AshbrookAllergy & Immunology Physician1386786408
- Chanda Banwat, M.D.Internal Medicine Physician1750584389
Verify Rebecca A. Parish in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMedical Board of California
Search for license A98073Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
61% fewer Medicare Part D claims than the average internal medicine physician in 2024
1,223 Medicare Part D claims for 87 beneficiaries, against an average of 3,176 among the 108,855 providers of this specialty who prescribed in Part D.
Most prescribed
- Metformin Hcl105 claims
- Rosuvastatin Calcium104 claims
- Levothyroxine Sodium65 claims
- Atorvastatin Calcium43 claims
- Amlodipine Besylate40 claims
- Omeprazole29 claims
Source: CMS Medicare Part D Prescribers by Provider and Drug, 2024 (data.cms.gov). Part D covers prescriptions for Medicare patients only; drugs with fewer than 11 claims are not published.
Rebecca A. Parish among 17,696 internal medicine physician records in California
Rebecca A. Parish, M.D. is one of 17,696 internal medicine physician records with a practice address in California. 79% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2006, is newer than 5% of them.
- NPI issued2006 · 5% of these records are older, 56% newer
- In a Medicare fileYes · 79% of these records are
- In the CMS Doctors and Clinicians fileNo · 63% of these records are
- Record last updated2014 · 61% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 207R00000X and a California practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
183 internal medicine physician records list a practice address in Walnut Creek
They are 183 of the 6,170 NPPES records with a practice address in Walnut Creek, and 17,696 internal medicine physician records in California.
All 17,696 in California → Every provider in Walnut Creek → Internal Medicine Physician nationwide →
The 8 internal medicine physician records with the nearest ZIP codes
- Deborah Arce, M.D.Walnut Creek, CA 945971841215605
- Devorah Ben-Zeev, M.D.Walnut Creek, CA 945971033160692
- Natalie Chang, M.D.Walnut Creek, CA 945971548370786
- Paul Endo, M.D.Walnut Creek, CA 945971568402014
- Poornima Goyal, M.D.Walnut Creek, CA 945971912933706
- Elise Hughes-Watkins, M.D.Walnut Creek, CA 945971578509741
- Thomas Miller, MDWalnut Creek, CA 945971750315560
- Robert Noriega, M.D.Walnut Creek, CA 945971922043249
Common questions
What is Rebecca A. Parish, M.D.'s NPI number?
Rebecca A. Parish, M.D.'s National Provider Identifier (NPI) is 1871655035, issued on Dec 14, 2006. An NPI identifies a provider in billing; it is not a license.
Where is Rebecca A. Parish, M.D. located?
The NPPES record lists a practice address at 1450 Treat Blvd, Walnut Creek, CA, 94597. Phone: (925) 296-9740. Providers update this record themselves, so call before visiting.
How can I verify Rebecca A. Parish, M.D.'s license?
NPPES lists California license number A98073, 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.
How much does Rebecca A. Parish, M.D. prescribe under Medicare Part D?
In 2024, Rebecca A. Parish, M.D. had 1,223 Medicare Part D claims for 87 beneficiaries; the average among internal medicine physician prescribers was 3,176. Part D covers Medicare prescriptions only.
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.