What is John Clark's specialty?

John Clark (NPI 1871550244) is a Medicare-billing provider whose primary specialty is Internal Medicine in Boston, MA.

Where does John Clark practice?

John Clark practices in Boston, MA, based on the location reported in the CMS Medicare provider datasets for NPI 1871550244.

How much does Medicare pay John Clark?

Medicare Part B utilization, prescribing (Part D), MIPS quality scores, and industry payments for John Clark (NPI 1871550244) are detailed on this CareTrace profile.

PROVIDER PROFILE · NPI 1871550244

John Clark

Internal MedicineBoston, MAI

MEDICARE UTILIZATION · PART B · 2024

No data available for this provider in 2024.

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 · 2025

No data available for this provider in 2025.

REFERRAL NETWORK

Where John Clark'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). 17 inbound referrers · 0 outbound destinations.

Receives referrals from

Inbound — who sends patients here

Physician	Patients	Visits
THE GENERAL HOSPITAL CORPORATION	239	3,840
Annie Chan Radiation Oncology · Boston, MA	46	819
Kevin Emerick Otolaryngology · Boston, MA	38	357
Derrick Lin Otolaryngology · Boston, MA	31	275
Laura Romo Diagnostic Radiology · Boston, MA	23	65
Paul Busse Radiation Oncology · Boston, MA	21	283
Hillary Kelly Diagnostic Radiology · Boston, MA	21	66
MASS GENERAL BRIGHAM HOME CARE, INC.	18	44
Gerald Abbott Diagnostic Radiology · Boston, MA	17	41
PATTI, JOHN	17	68
Jeanne Ackman Diagnostic Radiology · Boston, MA	17	50
Nada Farhat Pathology · Boston, MA	15	30

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