What is John Parker's specialty?

John Parker (NPI 1821005109) is a Medicare-billing provider whose primary specialty is Internal Medicine in Topsham, ME.

Where does John Parker practice?

John Parker practices in Topsham, ME, based on the location reported in the CMS Medicare provider datasets for NPI 1821005109.

How much does Medicare pay John Parker?

Medicare Part B utilization, prescribing (Part D), MIPS quality scores, and industry payments for John Parker (NPI 1821005109) are detailed on this CareTrace profile.

PROVIDER PROFILE · NPI 1821005109

John Parker

Internal MedicineTopsham, MEI

MEDICARE UTILIZATION · PART B · 2024

No data available for this provider in 2024.

PRESCRIBING · PART D · 2024

Total Rx claims

Beneficiaries

—

Total drug cost

$473

Distinct drugs

Brand share

0.0%

Top prescribed drugs

Famotidine13 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 John Parker'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). 14 inbound referrers · 0 outbound destinations.

Receives referrals from

Inbound — who sends patients here

Physician	Patients	Visits
Jaime Kline Diagnostic Radiology · Brunswick, ME	75	307
Keith Fleming Diagnostic Radiology · Brunswick, ME	64	258
Richard Schafer Internal Medicine · Farmington, ME	32	168
Christopher Meserve Internal Medicine · Topsham, ME	22	125
CORMIER, MARLENE	18	99
Mark Marotto Ophthalmology · Bath, ME	16	83
SAMSON, MICHAEL	15	54
RIEMANN, HELGE	14	34
Town Of Topsham Ambulance Service Provider · Topsham, ME	13	39
Callie Mcmahon Physician Assistant · Brunswick, ME	13	47
David Benton Hematology-Oncology · Topsham, ME	13	83
Hal Sreden Pulmonary Disease · Brunswick, ME	12	146

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