What is Orrin Troum's specialty?

Orrin Troum (NPI 1821032608) is a Medicare-billing provider whose primary specialty is Rheumatology in Santa Monica, CA.

Where does Orrin Troum practice?

Orrin Troum practices in Santa Monica, CA, based on the location reported in the CMS Medicare provider datasets for NPI 1821032608.

How much does Medicare pay Orrin Troum?

Orrin Troum (NPI 1821032608) received approximately $309K in total Medicare Part B payments, serving 899 beneficiaries, per the CMS Medicare Physician & Other Practitioners dataset.

PROVIDER PROFILE · NPI 1821032608

Orrin TroumMD

RheumatologySanta Monica, CAI

MEDICARE UTILIZATION · PART B · 2024

Total beneficiaries

2,735

Unique beneficiaries

—

Total services

8,617

Distinct HCPCS

Medicare payment

$297K

Peer benchmark

Total Medicare services vs. 530 Rheumatology providers in CA — above median (cohort median 1,833).

PRESCRIBING · PART D · 2024

Total Rx claims

2,931

Beneficiaries

—

Total drug cost

$4.8M

Distinct drugs

Brand share

35.1%

Top prescribed drugs

Methotrexate Sodium281 claims

Prednisone264 claims

Hydroxychloroquine Sulfate193 claims

Celecoxib167 claims

Gabapentin144 claims

QUALITY · MIPS · 2024

Final MIPS score

90.4

Quality

96.1

Cost

72.0

Improvement activities

40.0

Promoting interop.

100.0

Payment adjustment

0.65%

Group

INDUSTRY PAYMENTS · OPEN PAYMENTS · 2025

Total received

$322K

Payment records

533

By payment type

Compensation for services other than consulting, including serving as faculty or as a speaker at a venue other than a continuing education program$216K

Consulting Fee$49K

Travel and Lodging$43K

Food and Beverage$11K

Honoraria$2K

Top paying entities

Compensation for services other than consulting, including serving as faculty or as a speaker at a venue other than a continuing education program$216K

Consulting Fee$49K

Travel and Lodging$43K

Food and Beverage$11K

Honoraria$2K

REFERRAL NETWORK

Where Orrin Troum's patients come from & go

Directional shared-patient flow from Medicare claims — who sends patients to this provider (inbound) and where this provider's patients go next (outbound). 23 inbound referrers · 0 outbound destinations.

Receives referrals from

Inbound — who sends patients here

Physician	Patients	Visits
PROVIDENCE SAINT JOHN'S HEALTH CENTER	371	1,428
RHEUMATOLOGY DIAGNOSTICS LABORATORY INC	100	259
CRESCENDO BIOSCIENCE, INC	92	210
Unilab Corporation Clinical Laboratory · West Hills, CA	59	140
REGENTS OF THE UNIV OF CALIFORNIA	32	84
Robert Krasny Diagnostic Radiology · Santa Monica, CA	30	52
NPI 1205055472	28	94
Thomas Susko Rheumatology · Santa Monica, CA	24	46
CACHERIS, PHILLIP	23	67
Robert Khorramian Podiatry · Santa Monica, CA	22	69
Melani Shaum Hematology-Oncology · Lompoc, CA	21	188
Yuki Takasumi Pathology · Santa Monica, CA	21	61

Refers patients to

Outbound — where patients go next

No outbound pairs above the suppression threshold.

Source: CMS Physician Shared Patient Patterns (30-day window, Medicare FFS). Direction = a beneficiary seen by the first provider, then the second, within 30 days; a proxy for referral, not a documented referral. Pairs with fewer than 11 shared beneficiaries are suppressed.

CROSS-REFERENCE

Related data on other Healthparse brands

ProviderScore

OIG/SAM exclusion screening, sanctions history

Healthparse Signals

Monitor this provider for changes — dated NPI change events