Rahel Teferi Ruiz
Internal Medicine Physician · Castro Valley, CA
Rahel Teferi Ruiz is an internal medicine physician with a practice address in Castro Valley, California, and NPI 1821089129, issued on Nov 4, 2005. Check the license (California A64304, as entered in NPPES) on the Medical Board of California; the Medicare figures below come from public CMS files.
- Name
- Rahel Teferi Ruiz
- Primary taxonomy
- Internal Medicine Physician 207R00000X
- License number
- A64304 CA
Self-reported in NPPES; status is on the state search - Practice location
- 18675 Buren PL, Castro Valley, CA 94552
- Phone
- (510) 881-2192
- Enumerated
- Nov 4, 2005
- Record last updated
- Dec 24, 2019 (not updated in 7 years: call before relying on the address or phone)
- Fax
- (510) 363-8642
- Medicare enrollment
- Enrolled (PECOS I20051109000537); accepts Medicare assignment
- Medical or professional school
- Harvard Medical School, 1996
- Entity
- Type 1 · individual
8 nearest internal medicine physician records → All 17,696 in California → Look up another NPI →
Verify Rahel Teferi Ruiz in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMedical Board of California
Search for license A64304Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
19% more Medicare Part D claims than the average internal medicine physician in 2024
3,769 Medicare Part D claims for 352 beneficiaries, against an average of 3,176 among the 108,855 providers of this specialty who prescribed in Part D. 31 claims were for opioids.
Most prescribed
- Atorvastatin Calcium379 claims
- Amlodipine Besylate332 claims
- Metformin Hcl206 claims
- Losartan Potassium181 claims
- Levothyroxine Sodium134 claims
- Rosuvastatin Calcium125 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.
Industry payments in 2024: $185.23
7 payments; by number, the most common kind was food and beverage; the largest payer was Astellas Pharma US Inc. The 50,334 providers of this specialty with any payment received $1,303.06 on average. Payments are reported by manufacturers, not by the provider, and are not a sign of wrongdoing.
Source: CMS Open Payments, program year 2024 (openpaymentsdata.cms.gov); average among providers of this specialty with at least one payment.
Bills Medicare through one group practice
- The West Oakland Health CouncilOakland, CA
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Rahel Teferi Ruiz among 17,696 internal medicine physician records in California
Rahel Teferi Ruiz 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 2005, is newer than 0% of them.
- NPI issued2005 · 0% of these records are older, 95% newer
- In a Medicare fileYes · 79% of these records are
- In the CMS Doctors and Clinicians fileYes · 63% of these records are
- Graduated1996 · median 2004 among the 11,065 with a school on file
- Record last updated2019 · 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).
24 internal medicine physician records list a practice address in Castro Valley
They are 24 of the 999 NPPES records with a practice address in Castro Valley, and 17,696 internal medicine physician records in California.
All 17,696 in California → Every provider in Castro Valley → Internal Medicine Physician nationwide →
The 8 internal medicine physician records with the nearest ZIP codes
- Saima Mahmood, MDCastro Valley, CA 945521477555811
- Mahendra Patel, MDCastro Valley, CA 945521700758638
- Chandran Arulanandan, MDLivermore, CA 945511689752784
- Timoteo Canio, MDLivermore, CA 945511164594974
- David Chapman, MDMartinez, CA 945531578548129
- Daniel Combitsis, DOLivermore, CA 945511942346549
- Yan Dai, MDLivermore, CA 945511740368836
- Babita Dhapola, MDLivermore, CA 945511396811873
Common questions
What is Rahel Teferi Ruiz's NPI number?
Rahel Teferi Ruiz's National Provider Identifier (NPI) is 1821089129, issued on Nov 4, 2005. An NPI identifies a provider in billing; it is not a license.
Where is Rahel Teferi Ruiz located?
The NPPES record lists a practice address at 18675 Buren PL, Castro Valley, CA, 94552. Phone: (510) 881-2192. Providers update this record themselves, so call before visiting.
How can I verify Rahel Teferi Ruiz's license?
NPPES lists California license number A64304, 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 Rahel Teferi Ruiz prescribe under Medicare Part D?
In 2024, Rahel Teferi Ruiz had 3,769 Medicare Part D claims for 352 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.