What is Karen Marcus's specialty?

Karen Marcus (NPI 1003043993) is a Medicare-billing provider whose primary specialty is Psychiatry in Pittsburg, CA.

Where does Karen Marcus practice?

Karen Marcus practices in Pittsburg, CA, based on the location reported in the CMS Medicare provider datasets for NPI 1003043993.

How much does Medicare pay Karen Marcus?

Karen Marcus (NPI 1003043993) received approximately $70K in total Medicare Part B payments, serving 100 beneficiaries, per the CMS Medicare Physician & Other Practitioners dataset.

PROVIDER PROFILE · NPI 1003043993

Karen MarcusM.D.

PsychiatryPittsburg, CAI

MEDICARE UTILIZATION · PART B · 2024

Total beneficiaries

223

Unique beneficiaries

—

Total services

854

Distinct HCPCS

Medicare payment

$69K

Peer benchmark

Total Medicare services vs. 2,213 Psychiatry providers in CA — top quintile (cohort median 203).

PRESCRIBING · PART D · 2024

Total Rx claims

Beneficiaries

—

Total drug cost

$532

Distinct drugs

Brand share

0.0%

Top prescribed drugs

Metformin Hcl15 claims

Trazodone Hcl13 claims

Aripiprazole12 claims

QUALITY · MIPS · 2024

No data available for this provider in 2024.

INDUSTRY PAYMENTS · OPEN PAYMENTS · 2024

No data available for this provider in 2024.

FACILITY AFFILIATIONS

Hospital & Facility Affiliations (1)

CCN 050305

Hospital

REFERRAL NETWORK

Where Karen Marcus'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 · 6 outbound destinations.

Receives referrals from

Inbound — who sends patients here

Physician	Patients	Visits
ALAMEDA HEALTH SYSTEM	55	252

Refers patients to

Outbound — where patients go next

Physician	Patients	Visits
ALAMEDA HEALTH SYSTEM	80	642
Ronald Seff Psychiatry · Woodside, CA	44	188
Unilab Corporation Clinical Laboratory · Sacramento, CA	20	50
CONTRA COSTA COUNTY	13	49
Unilab Corporation Clinical Laboratory · San Jose, CA	13	56
PARAMEDICS PLUS, LLC	11	18

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