PROVIDER PROFILE · NPI 1205883238

Marcia TonnesenM.D.

PRACTICENORTH SHORE HEMATOLOGY ONCOLOGY ASSOCIATESSee all providers at this practice →

DermatologyEast Setauket, NYI

MEDICARE UTILIZATION · PART B · 2024

Total beneficiaries

Unique beneficiaries

—

Total services

244

Distinct HCPCS

Medicare payment

$27K

Peer benchmark

Total Medicare services vs. 960 Dermatology providers in NY — bottom quintile (cohort median 1,575).

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 · 2024

No data available for this provider in 2024.

REFERRAL NETWORK

Where Marcia Tonnesen'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
Evan Jones Micrographic Dermatologic Surgery · Stony Brook, NY	12	81

Refers patients to

Outbound — where patients go next

Physician	Patients	Visits
Tara Kaufmann Dermatology · East Setauket, NY	16	800
Evan Jones Micrographic Dermatologic Surgery · Stony Brook, NY	12	86
CLARK, RICHARD	12	81

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