What is Mark Grzesiak's specialty?

Mark Grzesiak (NPI 1376717272) is a Medicare-billing provider whose primary specialty is Physician Assistant in Mineola, NY.

Where does Mark Grzesiak practice?

Mark Grzesiak practices in Mineola, NY, based on the location reported in the CMS Medicare provider datasets for NPI 1376717272.

How much does Medicare pay Mark Grzesiak?

Mark Grzesiak (NPI 1376717272) received approximately $3K in total Medicare Part B payments, serving 28 beneficiaries, per the CMS Medicare Physician & Other Practitioners dataset.

PROVIDER PROFILE · NPI 1376717272

Mark GrzesiakRPAC

PRACTICENYU LANGONE HOSPITALSSee all providers at this practice →

Physician AssistantMineola, NYI

MEDICARE UTILIZATION · PART B · 2024

Total beneficiaries

Unique beneficiaries

—

Total services

Distinct HCPCS

Medicare payment

$3K

Peer benchmark

Total Medicare services vs. 8,690 Physician Assistant providers in NY — bottom quintile (cohort median 149).

PRESCRIBING · PART D · 2024

Total Rx claims

684

Beneficiaries

—

Total drug cost

$441K

Distinct drugs

Brand share

37.3%

Top prescribed drugs

Ondansetron105 claims

Olanzapine69 claims

Oxycodone Hcl56 claims

Apixaban43 claims

Prochlorperazine Maleate40 claims

QUALITY · MIPS · 2024

Final MIPS score

79.1

Quality

57.9

Cost

80.4

Improvement activities

40.0

Promoting interop.

77.0

Payment adjustment

0.17%

Group

INDUSTRY PAYMENTS · OPEN PAYMENTS · 2025

No data available for this provider in 2025.

REFERRAL NETWORK

Where Mark Grzesiak'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). 1 inbound referrers · 3 outbound destinations.

Receives referrals from

Inbound — who sends patients here

Physician	Patients	Visits
Sunil Butani Physical Medicine and Rehabilitation · Mineola, NY	23	124

Refers patients to

Outbound — where patients go next

Physician	Patients	Visits
Sunil Butani Physical Medicine and Rehabilitation · Mineola, NY	29	207
Timur Yasin Physical Medicine and Rehabilitation · Smithtown, NY	20	27
Usman Saleem Interventional Pain Management · Bellerose, NY	11	13

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