What is Marion Kowalewski's specialty?

Marion Kowalewski (NPI 1538126461) is a Medicare-billing provider whose primary specialty is Internal Medicine in Baltimore, MD.

Where does Marion Kowalewski practice?

Marion Kowalewski practices in Baltimore, MD, based on the location reported in the CMS Medicare provider datasets for NPI 1538126461.

How much does Medicare pay Marion Kowalewski?

Marion Kowalewski (NPI 1538126461) received approximately $244K in total Medicare Part B payments, serving 926 beneficiaries, per the CMS Medicare Physician & Other Practitioners dataset.

PROVIDER PROFILE · NPI 1538126461

Marion KowalewskiM.D.

PRACTICEMERCY MEDICAL CENTERSee all providers at this practice →

Internal MedicineBaltimore, MDI

MEDICARE UTILIZATION · PART B · 2024

Total beneficiaries

3,409

Unique beneficiaries

—

Total services

5,235

Distinct HCPCS

Medicare payment

$239K

Peer benchmark

Total Medicare services vs. 2,306 Internal Medicine providers in MD — top quintile (cohort median 884).

PRESCRIBING · PART D · 2024

Total Rx claims

15,065

Beneficiaries

—

Total drug cost

$1.2M

Distinct drugs

179

Brand share

23.8%

Top prescribed drugs

Atorvastatin Calcium713 claims

Losartan Potassium511 claims

Levothyroxine Sodium490 claims

Amlodipine Besylate385 claims

Pantoprazole Sodium349 claims

QUALITY · MIPS · 2024

No data available for this provider in 2024.

INDUSTRY PAYMENTS · OPEN PAYMENTS · 2025

Total received

$62

Payment records

By payment type

Food and Beverage$62

Top paying entities

Food and Beverage$62

REFERRAL NETWORK

Where Marion Kowalewski'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
NPI 1255386041	128	314
UNIVERSITY OF MARYLAND ST. JOSEPH MEDICAL CENTER, LLC	81	525
FRANKLIN SQUARE HOSPITAL CENTER, INC	79	290
Kak Kim Vascular Surgery · Flushing, NY	73	182
Ankur Gupta Diagnostic Radiology · New York, NY	65	127
MERCY MEDICAL CENTER INC	51	225
Laboratory Corporation Of America Holdings Clinical Laboratory · Raritan, NJ	45	108
Quest Diagnostics Incorporated Md Clinical Laboratory · Baltimore, MD	37	103
Sean Sider Podiatry · Baltimore, MD	31	114
GREATER BALTIMORE MEDICAL CENTER, INC.	30	190
Janet Lin Dermatology · Baltimore, MD	25	61
Blair Andrew Diagnostic Radiology · Baltimore, MD	24	69

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