What is Winfred Williams's specialty?

Winfred Williams (NPI 1891709242) is a Medicare-billing provider whose primary specialty is Nephrology in Boston, MA.

Where does Winfred Williams practice?

Winfred Williams practices in Boston, MA, based on the location reported in the CMS Medicare provider datasets for NPI 1891709242.

How much does Medicare pay Winfred Williams?

Winfred Williams (NPI 1891709242) received approximately $19K in total Medicare Part B payments, serving 90 beneficiaries, per the CMS Medicare Physician & Other Practitioners dataset.

PROVIDER PROFILE · NPI 1891709242

Winfred WilliamsMD

NephrologyBoston, MAI

MEDICARE UTILIZATION · PART B · 2024

Total beneficiaries

127

Unique beneficiaries

—

Total services

203

Distinct HCPCS

Medicare payment

$16K

Peer benchmark

Total Medicare services vs. 270 Nephrology providers in MA — bottom quintile (cohort median 904).

PRESCRIBING · PART D · 2024

Total Rx claims

699

Beneficiaries

—

Total drug cost

$63K

Distinct drugs

Brand share

5.3%

Top prescribed drugs

Prednisone172 claims

Tacrolimus63 claims

Amlodipine Besylate62 claims

Mycophenolate Mofetil53 claims

Furosemide48 claims

QUALITY · MIPS · 2024

No data available for this provider in 2024.

INDUSTRY PAYMENTS · OPEN PAYMENTS · 2025

No data available for this provider in 2025.

REFERRAL NETWORK

Where Winfred Williams'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). 28 inbound referrers · 0 outbound destinations.

Receives referrals from

Inbound — who sends patients here

Physician	Patients	Visits
THE GENERAL HOSPITAL CORPORATION	219	2,691
Eliot Heher Nephrology · Boston, MA	48	426
Quest Diagnostics Massachusetts Llc Clinical Laboratory · Marlborough, MA	45	530
Tatsuo Kawai General Surgery · Boston, MA	38	267
Parsia Vagefi General Surgery · Boston, MA	31	124
David Wojciechowski Nephrology · Dallas, TX	27	134
Thomas Ptak Diagnostic Radiology · Worcester, MA	20	56
PATTI, JOHN	20	51
Anand Prabhakar Diagnostic Radiology · Boston, MA	20	44
Matthew Gilman Diagnostic Radiology · Boston, MA	19	67
John Godine Endocrinology · Boston, MA	19	133
Ajay Singh Diagnostic Radiology · Boston, MA	19	74

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