What is Marc Merbaum's specialty?

Marc Merbaum (NPI 1245204338) is a Medicare-billing provider whose primary specialty is Internal Medicine in Saint Louis, MO.

Where does Marc Merbaum practice?

Marc Merbaum practices in Saint Louis, MO, based on the location reported in the CMS Medicare provider datasets for NPI 1245204338.

How much does Medicare pay Marc Merbaum?

Marc Merbaum (NPI 1245204338) received approximately $82K in total Medicare Part B payments, serving 233 beneficiaries, per the CMS Medicare Physician & Other Practitioners dataset.

PROVIDER PROFILE · NPI 1245204338

Marc MerbaumM.D.

Internal MedicineSaint Louis, MOI

MEDICARE UTILIZATION · PART B · 2024

Total beneficiaries

1,924

Unique beneficiaries

—

Total services

2,622

Distinct HCPCS

Medicare payment

$66K

Peer benchmark

Total Medicare services vs. 1,563 Internal Medicine providers in MO — top quintile (cohort median 658).

PRESCRIBING · PART D · 2024

Total Rx claims

12,394

Beneficiaries

—

Total drug cost

$952K

Distinct drugs

137

Brand share

20.0%

Top prescribed drugs

Amlodipine Besylate787 claims

Lisinopril718 claims

Atorvastatin Calcium552 claims

Levothyroxine Sodium518 claims

Metoprolol Succinate506 claims

QUALITY · MIPS · 2024

No data available for this provider in 2024.

INDUSTRY PAYMENTS · OPEN PAYMENTS · 2025

Total received

$19

Payment records

By payment type

Food and Beverage$19

Top paying entities

Food and Beverage$19

REFERRAL NETWORK

Where Marc Merbaum'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). 9 inbound referrers · 22 outbound destinations.

Receives referrals from

Inbound — who sends patients here

Physician	Patients	Visits
MERCY HOSPITALS EAST COMMUNITIES	208	1,302
ROSENTHAL, DEBRA	24	67
Cindy Zhang Diagnostic Radiology · Saint Louis, MO	22	75
ST. LUKES EPISCOPAL-PRESBYTERIAN HOSPITAL	18	51
MERCY HEALTH SERVICES LLC	17	63
Jeffrey Reed Dermatology · Saint Louis, MO	16	40
Toni Roth Diagnostic Radiology · Saint Louis, MO	16	46
Quest Diagnostics Clinical Laboratories Inc Clinical Laboratory · Maryland Heights, MO	12	29
Robert Ferrara Cardiology · Saint Louis, MO	11	29

Refers patients to

Outbound — where patients go next

Physician	Patients	Visits
MERCY HOSPITALS EAST COMMUNITIES	324	2,666
BOURGEOIS, NANCY	27	54
Donald Grunz Diagnostic Radiology · Saint Louis, MO	23	69
Labone Llc Clinical Laboratory · Lenexa, KS	20	58
Donna Igou Diagnostic Radiology · Saint Louis, MO	19	46
Thomas Applewhite Diagnostic Radiology · Saint Louis, MO	18	46
Deborah Wadsworth Diagnostic Radiology · Saint Louis, MO	18	46
ST. LUKES EPISCOPAL-PRESBYTERIAN HOSPITAL	17	47
Kerri Harting Diagnostic Radiology · Plymouth, MN	16	54
Cindy Zhang Diagnostic Radiology · Saint Louis, MO	14	36
Jeffrey Reed Dermatology · Saint Louis, MO	14	34
Deryk Mcdowell Cardiology · Saint Louis, MO	14	35

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