PROVIDER PROFILE · NPI 1902999212

Karen MrejenMD

PRACTICELOUIS SAFFRAN PHYSICIAN PLLCSee all providers at this practice →

Pulmonary DiseaseRockville Centre, NYI

MEDICARE UTILIZATION · PART B · 2024

Total beneficiaries

1,645

Unique beneficiaries

—

Total services

2,165

Distinct HCPCS

Medicare payment

$128K

Peer benchmark

Total Medicare services vs. 811 Pulmonary Disease providers in NY — top quintile (cohort median 790).

PRESCRIBING · PART D · 2024

Total Rx claims

2,581

Beneficiaries

—

Total drug cost

$809K

Distinct drugs

Brand share

65.4%

Top prescribed drugs

Albuterol Sulfate538 claims

Fluticasone/Umeclidin/Vilanter286 claims

Fluticasone/Vilanterol246 claims

Azithromycin213 claims

Prednisone186 claims

QUALITY · MIPS · 2024

Final MIPS score

93.1

Quality

79.8

Cost

0.0

Improvement activities

40.0

Promoting interop.

88.8

Payment adjustment

0.76%

APM Entity

INDUSTRY PAYMENTS · OPEN PAYMENTS · 2024

No data available for this provider in 2024.

REFERRAL NETWORK

Where Karen Mrejen'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). 59 inbound referrers · 0 outbound destinations.

Receives referrals from

Inbound — who sends patients here

Physician	Patients	Visits
Raul Mendoza Cardiology · Lawrence, NY	213	482
Andrew Hwang Diagnostic Radiology · Anaheim, CA	147	367
Sydney Yoon Diagnostic Radiology · Oceanside, NY	117	300
David Pfeffer Diagnostic Radiology · West Islip, NY	100	225
Ari Steiner Diagnostic Radiology · Garden City, NY	88	198
Pilar Stevens-Haynes Cardiology · Oceanside, NY	81	138
KAMATH, AVIVA	73	290
ROSNER, LOUIS	58	131
Seniorcare Emergency Medical Services Inc. Ambulance Service Provider · Bronx, NY	47	83
Stephen Covey Interventional Cardiology · Rockville Centre, NY	43	108
Quest Diagnostics Clinical Laboratories Inc Clinical Laboratory · Melville, NY	43	146
Donna Denier Cardiology · Boone, NC	39	57

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