Stephen Tim Yip, D.O.
Family Medicine Physician · El Cajon, CA
Stephen Tim Yip, D.O. is a family medicine physician with a practice address in El Cajon, California, and NPI 1841580263, issued on Apr 19, 2011. Check the license (California 20A15005, as entered in NPPES) on the Medical Board of California; the Medicare figures below come from public CMS files.
- Name
- Stephen Tim Yip
- Credential
- D.O.
- Primary taxonomy
- Family Medicine Physician 207Q00000X
- License numbers
- 20A15005 CA
DO165788 OR
Self-reported in NPPES; status is on the state search - Practice location
- 1630 E Main St, El Cajon, CA 92021
- Phone
- (619) 590-4107
- Enumerated
- Apr 19, 2011
- Record last updated
- Dec 2, 2021 (not updated in 5 years: call before relying on the address or phone)
- Medicare enrollment
- Enrolled (PECOS I20161118001509); accepts Medicare assignment
- Entity
- Type 1 · individual
8 nearest family medicine physician records → All 17,133 in California → Look up another NPI →
Also registered at 1630 E Main St
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Reina Abeyta, MSN, FNP-BCFamily Nurse Practitioner1922235662
- Olivia Aguirre, MFTMarriage & Family Therapist1225176068
- Katherine Ahearn-Edwards, LCSWClinical Social Worker1205032067
- Paul Arenson, LCSWClinical Social Worker1356547228
- Shahla Arjomandfar, PHARMACISTPharmacist1407024573
- William Armentrout, MAMarriage & Family Therapist1861871162
Verify Stephen Tim Yip in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMedical Board of California
Search for license 20A15005Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
74% more Medicare Part D claims than the average family medicine physician in 2024
6,182 Medicare Part D claims for 950 beneficiaries, against an average of 3,544 among the 117,163 providers of this specialty who prescribed in Part D. Brand-name drugs were 10% of claims. 407 claims were for opioids.
Most prescribed
- Atorvastatin Calcium551 claims
- Lisinopril277 claims
- Hydrocodone-Acetaminophen232 claims
- Amlodipine Besylate223 claims
- Levothyroxine Sodium200 claims
- Rosuvastatin Calcium200 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.
Bills Medicare through one group practice
- Southern California Permanente Medical GroupEl Cajon, CA
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Stephen Tim Yip among 17,133 family medicine physician records in California
Stephen Tim Yip, D.O. is one of 17,133 family medicine physician records with a practice address in California. 81% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2011, is newer than 63% of them.
- NPI issued2011 · 63% of these records are older, 34% newer
- In a Medicare fileYes · 81% of these records are
- In the CMS Doctors and Clinicians fileYes · 62% of these records are
- Graduated2011 · median 2005 among the 10,652 with a school on file
- Record last updated2021 · 58% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 207Q00000X and a California practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
52 family medicine physician records list a practice address in El Cajon
They are 52 of the 3,277 NPPES records with a practice address in El Cajon, and 17,133 family medicine physician records in California.
All 17,133 in California → Every provider in El Cajon → Family Medicine Physician nationwide →
The 8 family medicine physician records with the nearest ZIP codes
- Muhammad Azam, M.D.El Cajon, CA 920211740244367
- Dennis Dominguez, M.D.El Cajon, CA 920211225063811
- Maria Amanda Gamboa, M.D.El Cajon, CA 920211740638550
- Susannah Giezentaner, DOEl Cajon, CA 920211922123355
- Mona Hacker, M.D.El Cajon, CA 920211285847871
- David Howe, M.D., D.C.El Cajon, CA 920211356544837
- Nejat Jalisi, M.D.El Cajon, CA 920211063651552
- John James, MDEl Cajon, CA 920211174682108
Common questions
What is Stephen Tim Yip, D.O.'s NPI number?
Stephen Tim Yip, D.O.'s National Provider Identifier (NPI) is 1841580263, issued on Apr 19, 2011. An NPI identifies a provider in billing; it is not a license.
Where is Stephen Tim Yip, D.O. located?
The NPPES record lists a practice address at 1630 E Main St, El Cajon, CA, 92021. Phone: (619) 590-4107. Providers update this record themselves, so call before visiting.
How can I verify Stephen Tim Yip, D.O.'s license?
NPPES lists California license number 20A15005, 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 Stephen Tim Yip, D.O. prescribe under Medicare Part D?
In 2024, Stephen Tim Yip, D.O. had 6,182 Medicare Part D claims for 950 beneficiaries; the average among family medicine physician prescribers was 3,544. 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.