What is Keith Marcus's specialty?

Keith Marcus (NPI 1255371365) is a Medicare-billing provider whose primary specialty is Hospitalist in Ludington, MI.

Where does Keith Marcus practice?

Keith Marcus practices in Ludington, MI, based on the location reported in the CMS Medicare provider datasets for NPI 1255371365.

How much does Medicare pay Keith Marcus?

Keith Marcus (NPI 1255371365) received approximately $18K in total Medicare Part B payments, serving 110 beneficiaries, per the CMS Medicare Physician & Other Practitioners dataset.

PROVIDER PROFILE · NPI 1255371365

Keith MarcusMD

PRACTICEHOSPITALIST MEDICINE PHYSICIANS OF MICHIGAN - KALAMAZOO, PLLCSee all providers at this practice →

HospitalistLudington, MII

MEDICARE UTILIZATION · PART B · 2024

Total beneficiaries

172

Unique beneficiaries

—

Total services

223

Distinct HCPCS

Medicare payment

$16K

Peer benchmark

Total Medicare services vs. 441 Hospitalist providers in MI — bottom quintile (cohort median 471).

PRESCRIBING · PART D · 2024

Total Rx claims

118

Beneficiaries

—

Total drug cost

$990

Distinct drugs

Brand share

11.9%

Top prescribed drugs

Pantoprazole Sodium23 claims

Omeprazole17 claims

Potassium Chloride15 claims

Prednisone14 claims

Cefuroxime Axetil14 claims

QUALITY · MIPS · 2024

No data available for this provider in 2024.

INDUSTRY PAYMENTS · OPEN PAYMENTS · 2025

Total received

$563

Payment records

By payment type

Food and Beverage$563

Top paying entities

Food and Beverage$563

FACILITY AFFILIATIONS

Hospital & Facility Affiliations (1)

CCN 230110

Hospital

REFERRAL NETWORK

Where Keith 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). 45 inbound referrers · 85 outbound destinations.

Receives referrals from

Inbound — who sends patients here

Physician	Patients	Visits
MUNSON HEALTHCARE GRAYLING	69	178
Jesse Johnson Diagnostic Radiology · Traverse City, MI	65	151
KOWALSKI, ROBERT	62	134
NORTH FLIGHT INC	60	155
WILLIAMS, CHARLES	56	141
William George Internal Medicine · Traverse City, MI	56	154
Niladri Mal Hospitalist · Cadillac, MI	56	122
SHINTANI, GARY	56	134
Michael Salata Internal Medicine · Traverse City, MI	52	147
FAMILY PRACTICE OF CADILLAC PC	51	104
MERCY HOSPITAL CADILLAC	49	133
PAYNE, DAVID	49	108

Refers patients to

Outbound — where patients go next

Physician	Patients	Visits
MUNSON HEALTHCARE CADILLAC	252	891
REGENTS OF THE UNIVERSITY OF MICHIGAN	171	364
NPI 1720073364	109	328
MUNSON HOME CARE	82	166
NORTH FLIGHT INC	79	205
Gregory Lambourne Internal Medicine · Lake City, MI	79	311
KOWALSKI, ROBERT	76	153
James Shirley Diagnostic Radiology · Traverse City, MI	72	127
KENNELL, TODD	68	112
William George Internal Medicine · Traverse City, MI	66	224
Daniel Boss Diagnostic Radiology · Traverse City, MI	66	110
Patrick Gartland Diagnostic Radiology · Traverse City, MI	64	129

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