Stefan Ruehm, MD
Internal Medicine Physician · Los Angeles, CA
Stefan Ruehm, MD is an internal medicine physician with a practice address in Los Angeles, California, and NPI 1669416632, issued on Jun 16, 2006. Check the license (California A97859, as entered in NPPES) on the Medical Board of California; the Medicare figures below come from public CMS files.
- Name
- Stefan Ruehm
- Credential
- MD
- Primary taxonomy
- Internal Medicine Physician 207R00000X
- License number
- A97859 CA
Self-reported in NPPES; status is on the state search - Practice location
- 100 Ucla Medical Plz Ste 100, Los Angeles, CA 90024
- Phone
- (310) 301-6800
- Enumerated
- Jun 16, 2006
- Record last updated
- Mar 24, 2025
- Fax
- (310) 794-9035
- Medicaid ID
- 000F51720 CA
- Medicare enrollment
- Enrolled (PECOS I20050308000846); accepts Medicare assignment
- Entity
- Type 1 · individual
8 nearest internal medicine physician records → All 17,696 in California → Look up another NPI →
Also registered at 100 Ucla Medical Plz Ste 100
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Karina Acevedo, AGACNP-BCNurse Practitioner1205485646
- Jhoanna Anuran Torres, NPNurse Practitioner1184870537
- Gary Duckwiler, MDVascular & Interventional Radiology Physician1538111216
- John Finn, MDDiagnostic Radiology Physician1619054533
- Cheickna Fofana, MDDiagnostic Radiology Physician1245729342
- Naomi Gedion, NPRegistered Nurse1497791222
Verify Stefan Ruehm in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMedical Board of California
Search for license A97859Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
99% fewer Medicare Part D claims than the average internal medicine physician in 2024
32 Medicare Part D claims for 15 beneficiaries, against an average of 3,176 among the 108,855 providers of this specialty who prescribed in Part D.
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): 75.5 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: $141.55
2 payments; by number, the most common kind was food and beverage; the largest payer was Heartflow, 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 3 group practices
- Clinica Medica PacoimaPacoima, CA
- Martin Luther King JR Community Medical FoundationCompton, CA
- Ucla Radiology Medical GroupLos Angeles, CA
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Stefan Ruehm among 17,696 internal medicine physician records in California
Stefan Ruehm, MD 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 fileYes · 63% of these records are
- Graduated1992 · median 2004 among the 11,065 with a school on file
- Record last updated2025 · 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).
1,423 internal medicine physician records list a practice address in Los Angeles
They are 1,423 of the 69,537 NPPES records with a practice address in Los Angeles, and 17,696 internal medicine physician records in California.
All 17,696 in California → Every provider in Los Angeles → Internal Medicine Physician nationwide →
The 8 internal medicine physician records with the nearest ZIP codes
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- Sarah Kim, M.D.Los Angeles, CA 900241205028651
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Common questions
What is Stefan Ruehm, MD's NPI number?
Stefan Ruehm, MD's National Provider Identifier (NPI) is 1669416632, issued on Jun 16, 2006. An NPI identifies a provider in billing; it is not a license.
Where is Stefan Ruehm, MD located?
The NPPES record lists a practice address at 100 Ucla Medical Plz Ste 100, Los Angeles, CA, 90024. Phone: (310) 301-6800. Providers update this record themselves, so call before visiting.
How can I verify Stefan Ruehm, MD's license?
NPPES lists California license number A97859, 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 Stefan Ruehm, MD prescribe under Medicare Part D?
In 2024, Stefan Ruehm, MD had 32 Medicare Part D claims for 15 beneficiaries; the average among internal medicine physician prescribers was 3,176. Part D covers Medicare prescriptions only.
What is Stefan Ruehm, MD's MIPS final score?
The 2023 MIPS final score is 75.5 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.