Karen Rachel Studer, M.D.
Public Health & General Preventive Medicine Physician · Loma Linda, CA
Karen Rachel Studer, M.D. is a public health & general preventive medicine physician with a practice address in Loma Linda, California, and NPI 1003133786, issued on Apr 21, 2010. Check the license (California A118946, as entered in NPPES) on the Medical Board of California; the Medicare figures below come from public CMS files.
- Name
- Karen Rachel Studer
- Credential
- M.D.
- Primary taxonomy
- Public Health & General Preventive Medicine Physician 2083P0901X
- License number
- A118946 CA
Self-reported in NPPES; status is on the state search - Practice location
- 11234 Anderson Street, Loma Linda, CA 92354
- Phone
- (909) 558-4000
- Enumerated
- Apr 21, 2010
- Record last updated
- Apr 4, 2018 (not updated in 8 years: call before relying on the address or phone)
- Medicare enrollment
- Enrolled (PECOS I20171023001120); accepts Medicare assignment
- Medical or professional school
- Loma Linda University School Of Medicine, 2010
- Entity
- Type 1 · individual
8 nearest public health & general preventive medicine physician records → All 325 in California → Look up another NPI →
Also registered at 11234 Anderson Street
A shared address usually means a shared clinic or building; it does not show who employs whom.
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- Adel Alset, MDStudent in an Organized Health Care Education/Training Program1184476970
- Ronald Anthony, NPFamily Nurse Practitioner1902363112
- Rahma Arafa, MDStudent in an Organized Health Care Education/Training Program1992400550
- Alanna Asgeirsson, MDStudent in an Organized Health Care Education/Training Program1306535372
Verify Karen Rachel Studer in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMedical Board of California
Search for license A118946Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
96% fewer Medicare Part D claims than the average public health & general preventive medicine physician in 2024
36 Medicare Part D claims for 16 beneficiaries, against an average of 820 among the 336 providers of this specialty who prescribed in Part D. Brand-name drugs were 64% of claims.
Most prescribed
- Ozempic15 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.
The practice group's MIPS final score for 2023 (Medicare payment program): 85.2 of 100
The Merit-based Incentive Payment System score is reported for the practice group, not for one clinician alone. Four categories are weighted into the final score; the average among 454,083 clinicians with a measured score was 83.5.
Source: CMS Quality Payment Program, MIPS performance year 2023, group reporting; category weights for 2023 (qpp.cms.gov).
Industry payments in 2024: $268.94
3 payments; by number, the most common kind was food and beverage; the largest payer was Lilly USA, LLC. The 181 providers of this specialty with any payment received $3,513.55 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 2 group practices
- Faculty Physicians And Surgeons OF LlusmLoma Linda, CA
- Sac Health SystemSan Bernardino, CA
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Karen Rachel Studer among 325 public health & general preventive medicine physician records in California
Karen Rachel Studer, M.D. is one of 325 public health & general preventive medicine physician records with a practice address in California. 27% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2010, is newer than 57% of them.
- NPI issued2010 · 57% of these records are older, 39% newer
- In a Medicare fileYes · 27% of these records are
- In the CMS Doctors and Clinicians fileYes · 13% of these records are
- Graduated2010 · median 2008 among the 42 with a school on file
- Record last updated2018 · 68% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 2083P0901X and a California practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
Public Health & General Preventive Medicine Physician providers in California
There are 325 public health & general preventive medicine physician records in California.
All 325 in California → Every provider in Loma Linda → Public Health & General Preventive Medicine Physician nationwide →
The 8 public health & general preventive medicine physician records with the nearest ZIP codes
- T Darnell, M.D.Loma Linda, CA 923541073695367
- Maryam Sanjari, M.D.Loma Linda, CA 923541760740427
- Linda Ferry, MD, MPHLoma Linda, CA 923571699866368
- Ryan Nelson, MD, MPH, DIPABPMLoma Linda, CA 923571730702630
- Peter Bastian, MDLoma Linda, CA 923501710299821
- Silvia Caswell, DOLoma Linda, CA 923501114585148
- Rebecca Chung, M.D.Loma Linda, CA 923501073875753
- Tonya Cramer, M.D., MPHLoma Linda, CA 923501083972350
Common questions
What is Karen Rachel Studer, M.D.'s NPI number?
Karen Rachel Studer, M.D.'s National Provider Identifier (NPI) is 1003133786, issued on Apr 21, 2010. An NPI identifies a provider in billing; it is not a license.
Where is Karen Rachel Studer, M.D. located?
The NPPES record lists a practice address at 11234 Anderson Street, Loma Linda, CA, 92354. Phone: (909) 558-4000. Providers update this record themselves, so call before visiting.
How can I verify Karen Rachel Studer, M.D.'s license?
NPPES lists California license number A118946, 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 Karen Rachel Studer, M.D. prescribe under Medicare Part D?
In 2024, Karen Rachel Studer, M.D. had 36 Medicare Part D claims for 16 beneficiaries; the average among public health & general preventive medicine physician prescribers was 820. Part D covers Medicare prescriptions only.
What is Karen Rachel Studer, M.D.'s MIPS final score?
The 2023 MIPS final score is 85.2 of 100, reported for the practice group. The average among 454,083 clinicians with a measured score was 83.5.
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.