What is Mary Riwes's specialty?

Mary Riwes (NPI 1750548434) is a Medicare-billing provider whose primary specialty is Medical Oncology in Ann Arbor, MI.

Where does Mary Riwes practice?

Mary Riwes practices in Ann Arbor, MI, based on the location reported in the CMS Medicare provider datasets for NPI 1750548434.

How much does Medicare pay Mary Riwes?

Mary Riwes (NPI 1750548434) received approximately $15K in total Medicare Part B payments, serving 33 beneficiaries, per the CMS Medicare Physician & Other Practitioners dataset.

PROVIDER PROFILE · NPI 1750548434

Mary RiwesD.O.

PRACTICEUNIVERSITY OF MICHIGANSee all providers at this practice →

Medical OncologyAnn Arbor, MII

MEDICARE UTILIZATION · PART B · 2024

Total beneficiaries

Unique beneficiaries

—

Total services

115

Distinct HCPCS

Medicare payment

$12K

Peer benchmark

Total Medicare services vs. 86 Medical Oncology providers in MI — bottom quintile (cohort median 430).

PRESCRIBING · PART D · 2024

Total Rx claims

Beneficiaries

—

Total drug cost

$446K

Distinct drugs

Brand share

77.5%

Top prescribed drugs

Apixaban26 claims

Ruxolitinib Phosphate18 claims

Dexamethasone16 claims

Secukinumab11 claims

QUALITY · MIPS · 2024

No data available for this provider in 2024.

INDUSTRY PAYMENTS · OPEN PAYMENTS · 2025

Total received

$2K

Payment records

By payment type

Travel and Lodging$1K

Food and Beverage$325

Top paying entities

Travel and Lodging$1K

Food and Beverage$325

REFERRAL NETWORK

Where Mary Riwes'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). 4 inbound referrers · 0 outbound destinations.

Receives referrals from

Inbound — who sends patients here

Physician	Patients	Visits
REGENTS OF THE UNIVERSITY OF MICHIGAN	51	2,544
Daniel Couriel Hematology-Oncology · Salt Lake City, UT	18	378
John Magenau Hematology · Ann Arbor, MI	18	253
Attaphol Pawarode Hematology-Oncology · Ann Arbor, MI	15	225

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