Orrin Troum, MD
NPI 1821032608 · Rheumatology Physician · Santa Monica, CA
Enrolled with Medicare as Practitioner - Rheumatology · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Orrin Troum, MD is a Rheumatology Physician provider in Santa Monica, CA (NPI 1821032608).
Provider details
- NPI number
- 1821032608
- Entity type
- Individual
- Primary specialty
- Rheumatology PhysicianAllopathic & Osteopathic Physicians
- Credential
- MD
- Sex
- Male
- Sole proprietor
- Yes
- License
- A37014 (CA)
Specialties & taxonomies
Allopathic & Osteopathic Physicians
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure25% of score
20 yrs in NPPES registry
- Profile completeness25% of score
100% of core fields populated
- Practice footprint15% of score
1 documented practice location
- Medicare service volume (vs. specialty peers)25% of score
4,221 Medicare services, 2024 (ranked within specialty)
- Open Payments transparency10% of score
Has Open Payments disclosures (2024)
Medicare volume is ranked against active providers in the same specialty. Signals a provider has no public data for (e.g. Medicare claims) are left out of the score entirely — never counted as zero — so providers without that data are not penalized. See the full formula and weights in our .
What this provider does (Medicare)
Based on Medicare fee-for-service claims, 2024; not all care is captured.
| Service (HCPCS) | Medicare services | Typical Medicare-allowed (2024) |
|---|---|---|
| Visit Complexity Inherent to Evaluation and Management Associated With Medical Care Services That Serve As the Continuing Focal Point for All Needed Health Care Services And/Or With Medical Care Services That Are Part of Ongoing Care Related to a Patient'SG2211 | 1,433 | $17 |
| Established Patient Office Or Other Outpatient Visit With Moderate Level of Decision Making, If Using Time, 30 Minutes Or More99214 | 1,196 | $139 |
| Insertion of Needle Into Vein for Collection of Blood Sample36415 | 665 | $9 |
| Established Patient Office Or Other Outpatient Visit With High Level of Medical Decision Making, If Using Time, 40 Minutes Or More99215 | 382 | $195 |
| Aspiration And/Or Injection of Fluid From Large Joint20610 | 223 | $72 |
What this provider prescribes (Medicare Part D)
Top drugs by Medicare Part D claim volume, 2024 · 58 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Methotrexate Sodiumbrand: Methotrexate | 281 | 77 |
| Prednisone | 264 | 41 |
| Hydroxychloroquine Sulfate | 193 | 42 |
| Celecoxib | 167 | 39 |
| Gabapentin | 144 | 28 |
| Tramadol Hcl | 137 | 26 |
| Duloxetine Hcl | 129 |
Transparency — industry payments
Based on CMS Open Payments, 2024; not all care is captured.
$264,389 across 451 records (Open Payments 2024)
Open Payments discloses payments and transfers of value (meals, travel, consulting, research, royalties) from drug and device makers to providers. This is a transparency signal, not a verdict — such payments are legal and common, and their presence is neither an endorsement nor a criticism. Source: CMS Open Payments, program year 2024.
Practice location
Mailing address
Registry dates
- Enumerated
- 2006-06-15
- Last updated
- 2021-04-20
- Certified
- 2021-04-20
Frequently asked questions
- What is Orrin Troum's NPI number?
- Orrin Troum's National Provider Identifier (NPI) is 1821032608, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Orrin Troum's specialty?
- Orrin Troum is listed in the NPPES registry with a primary specialty of Rheumatology Physician (Allopathic & Osteopathic Physicians).
- Where is Orrin Troum located?
- Orrin Troum's practice location on file with NPPES is 2336 Santa Monica Blvd Ste 207, Santa Monica, CA 90404-2067.
- What is Orrin Troum's phone number?
- The practice phone number listed in the NPPES registry for Orrin Troum is (310) 449-1999.
- Does Orrin Troum accept Medicare?
- Orrin Troum is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Orrin Troum's NPI active?
- Yes — Orrin Troum's NPI (1821032608) is active in the NPPES registry as of the last update on 2021-04-20.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.