Orrin M. Troum, MD
Rheumatology Physician · Santa Monica, CA
Orrin M. Troum, MD is a rheumatology physician with a practice address in Santa Monica, California, and NPI 1821032608, issued on Jun 15, 2006. Check the license (California A37014, as entered in NPPES) on the Medical Board of California; the Medicare figures below come from public CMS files.
- Name
- Orrin M. Troum
- Credential
- MD
- Primary taxonomy
- Rheumatology Physician 207RR0500X
- License number
- A37014 CA
Self-reported in NPPES; status is on the state search - Practice location
- 2336 Santa Monica Blvd Ste 207, Santa Monica, CA 90404
- Phone
- (310) 449-1999
- Enumerated
- Jun 15, 2006
- Record last updated
- Apr 20, 2021 (not updated in 5 years: call before relying on the address or phone)
- Fax
- (310) 453-8533
- Medicare enrollment
- Enrolled (PECOS I20061129000487); accepts Medicare assignment
- Telehealth
- Offers telehealth (CMS)
- Entity
- Type 1 · individual
8 nearest rheumatology physician records → All 926 in California → Look up another NPI →
Also registered at 2336 Santa Monica Blvd Ste 207
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Amro Balki, M.D.Rheumatology Physician1922237593
- Amy Kehl, MDRheumatology Physician1679879555
Verify Orrin M. Troum in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMedical Board of California
Search for license A37014Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
62% more Medicare Part D claims than the average rheumatology physician in 2024
3,195 Medicare Part D claims for 435 beneficiaries, against an average of 1,978 among the 6,301 providers of this specialty who prescribed in Part D. Brand-name drugs were 23% of claims. 283 claims were for opioids.
Most prescribed
- Methotrexate281 claims
- Prednisone264 claims
- Hydroxychloroquine Sulfate193 claims
- Celecoxib167 claims
- Gabapentin144 claims
- Tramadol Hcl137 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: $264,388.77
451 payments; by number, the most common kind was food and beverage; the largest payer was Abbvie Inc. The 4,486 providers of this specialty with any payment received $8,538.33 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
- Providence Saint Johns Medical FoundationSanta Monica, CA
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Orrin M. Troum among 926 rheumatology physician records in California
Orrin M. Troum, MD is one of 926 rheumatology 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 2006, is newer than 6% of them.
- NPI issued2006 · 6% of these records are older, 55% newer
- In a Medicare fileYes · 81% of these records are
- In the CMS Doctors and Clinicians fileYes · 69% of these records are
- Graduated1979 · median 2003 among the 641 with a school on file
- Record last updated2021 · 62% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 207RR0500X and a California practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
Rheumatology Physician providers in California
There are 926 rheumatology physician records in California.
All 926 in California → Every provider in Santa Monica → Rheumatology Physician nationwide →
The 8 rheumatology physician records with the nearest ZIP codes
- Amro Balki, M.D.Santa Monica, CA 904041922237593
- May Chatila, M.D.Santa Monica, CA 904041144253535
- Kristal Choi, M.D.Santa Monica, CA 904041396165882
- Amy Kehl, MDSanta Monica, CA 904041679879555
- Tanaz Kermani, M.D.Santa Monica, CA 904041720068448
- William Martin, MDSanta Monica, CA 904041174632970
- Sandra Ramer, MDSanta Monica, CA 904041508946419
- Elyse Rubenstein, MDSanta Monica, CA 904041508895095
Common questions
What is Orrin M. Troum, MD's NPI number?
Orrin M. Troum, MD's National Provider Identifier (NPI) is 1821032608, issued on Jun 15, 2006. An NPI identifies a provider in billing; it is not a license.
Where is Orrin M. Troum, MD located?
The NPPES record lists a practice address at 2336 Santa Monica Blvd Ste 207, Santa Monica, CA, 90404. Phone: (310) 449-1999. Providers update this record themselves, so call before visiting.
How can I verify Orrin M. Troum, MD's license?
NPPES lists California license number A37014, 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 Orrin M. Troum, MD prescribe under Medicare Part D?
In 2024, Orrin M. Troum, MD had 3,195 Medicare Part D claims for 435 beneficiaries; the average among rheumatology physician prescribers was 1,978. 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.