What is Marvin Ryou's specialty?

Marvin Ryou (NPI 1821104787) is a Medicare-billing provider whose primary specialty is Gastroenterology in Boston, MA.

Where does Marvin Ryou practice?

Marvin Ryou practices in Boston, MA, based on the location reported in the CMS Medicare provider datasets for NPI 1821104787.

How much does Medicare pay Marvin Ryou?

Marvin Ryou (NPI 1821104787) received approximately $70K in total Medicare Part B payments, serving 272 beneficiaries, per the CMS Medicare Physician & Other Practitioners dataset.

PROVIDER PROFILE · NPI 1821104787

Marvin RyouM.D.

GastroenterologyBoston, MAI

MEDICARE UTILIZATION · PART B · 2024

Total beneficiaries

371

Unique beneficiaries

—

Total services

408

Distinct HCPCS

Medicare payment

$51K

Peer benchmark

Total Medicare services vs. 483 Gastroenterology providers in MA — below median (cohort median 638).

PRESCRIBING · PART D · 2024

No data available for this provider in 2024.

QUALITY · MIPS · 2024

No data available for this provider in 2024.

INDUSTRY PAYMENTS · OPEN PAYMENTS · 2024

Total received

$23K

Payment records

By payment type

Education$12K

Consulting Fee$8K

Food and Beverage$2K

Travel and Lodging$937

Top paying entities

Education$12K

Consulting Fee$8K

Food and Beverage$2K

Travel and Lodging$937

REFERRAL NETWORK

Where Marvin Ryou'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). 7 inbound referrers · 0 outbound destinations.

Receives referrals from

Inbound — who sends patients here

Physician	Patients	Visits
Agoston Agoston Pathology · Boston, MA	19	42
Robert Daniel Odze Pathology · Boston, MA	18	37
Jennifer Uyeda Diagnostic Radiology · Boston, MA	14	23
Quest Diagnostics Massachusetts Llc Clinical Laboratory · Marlborough, MA	14	39
DOYLE, LEONA	13	29
Jeffrey Krane Pathology · Los Angeles, CA	11	30
Paul Shyn Diagnostic Radiology · Boston, MA	11	22

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