What is William Oh's specialty?

William Oh (NPI 1225095581) is a Medicare-billing provider whose primary specialty is Internal Medicine in Greenwich, CT.

Where does William Oh practice?

William Oh practices in Greenwich, CT, based on the location reported in the CMS Medicare provider datasets for NPI 1225095581.

How much does Medicare pay William Oh?

William Oh (NPI 1225095581) received approximately $37K in total Medicare Part B payments, serving 157 beneficiaries, per the CMS Medicare Physician & Other Practitioners dataset.

PROVIDER PROFILE · NPI 1225095581

William OhM.D.

PRACTICESURGICAL SPECIALISTS OF GREENWICHSee all providers at this practice →

Internal MedicineGreenwich, CTI

MEDICARE UTILIZATION · PART B · 2024

Total beneficiaries

237

Unique beneficiaries

—

Total services

480

Distinct HCPCS

Medicare payment

$35K

Peer benchmark

Total Medicare services vs. 1,650 Internal Medicine providers in CT — below median (cohort median 549).

PRESCRIBING · PART D · 2024

Total Rx claims

Beneficiaries

—

Total drug cost

$306K

Distinct drugs

Brand share

76.0%

Top prescribed drugs

Darolutamide26 claims

Tamsulosin Hcl12 claims

Venlafaxine Hcl12 claims

QUALITY · MIPS · 2024

No data available for this provider in 2024.

INDUSTRY PAYMENTS · OPEN PAYMENTS · 2025

Total received

$18K

Payment records

By payment type

Consulting Fee$13K

Compensation for services other than consulting, including serving as faculty or as a speaker at a venue other than a continuing education program$3K

Food and Beverage$994

Travel and Lodging$815

Top paying entities

Consulting Fee$13K

Compensation for services other than consulting, including serving as faculty or as a speaker at a venue other than a continuing education program$3K

Food and Beverage$994

Travel and Lodging$815

FACILITY AFFILIATIONS

Hospital & Facility Affiliations (3)

CCN 070018

Hospital

CCN 070022

Hospital

CCN 330024

Hospital

REFERRAL NETWORK

Where William Oh'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). 2 inbound referrers · 6 outbound destinations.

Receives referrals from

Inbound — who sends patients here

Physician	Patients	Visits
MOUNT SINAI HOSPITAL	22	76
Eric Wilck Diagnostic Radiology · New York, NY	11	38

Refers patients to

Outbound — where patients go next

Physician	Patients	Visits
MOUNT SINAI HOSPITAL	122	1,191
Ashutosh Tewari Urology · New York, NY	25	131
MOUNT SINAI HOSPITAL	19	47
George Haines Pathology · Chicago, IL	16	34
Quest Diagnostics Incorporated Clinical Laboratory · Clifton, NJ	14	58
Eric Wilck Diagnostic Radiology · New York, NY	12	24

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