What is David Janssen's specialty?

David Janssen (NPI 1700995339) is a Medicare-billing provider whose primary specialty is Infectious Disease in O Fallon, MO.

Where does David Janssen practice?

David Janssen practices in O Fallon, MO, based on the location reported in the CMS Medicare provider datasets for NPI 1700995339.

How much does Medicare pay David Janssen?

David Janssen (NPI 1700995339) received approximately $42K in total Medicare Part B payments, serving 93 beneficiaries, per the CMS Medicare Physician & Other Practitioners dataset.

PROVIDER PROFILE · NPI 1700995339

David JanssenM.D.

Infectious DiseaseO Fallon, MOI

MEDICARE UTILIZATION · PART B · 2024

Total beneficiaries

193

Unique beneficiaries

—

Total services

571

Distinct HCPCS

Medicare payment

$40K

Peer benchmark

Total Medicare services vs. 125 Infectious Disease providers in MO — above median (cohort median 373).

PRESCRIBING · PART D · 2024

Total Rx claims

539

Beneficiaries

—

Total drug cost

$75K

Distinct drugs

Brand share

65.9%

Top prescribed drugs

Cefuroxime Axetil96 claims

Ceftriaxone Sodium67 claims

Amoxicillin/Potassium Clav62 claims

Ertapenem Sodium48 claims

Doxycycline Hyclate38 claims

QUALITY · MIPS · 2024

No data available for this provider in 2024.

INDUSTRY PAYMENTS · OPEN PAYMENTS · 2025

No data available for this provider in 2025.

REFERRAL NETWORK

Where David Janssen'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). 59 inbound referrers · 0 outbound destinations.

Receives referrals from

Inbound — who sends patients here

Physician	Patients	Visits
MERCY HOSPITALS EAST COMMUNITIES	213	1,696
ROSENTHAL, DEBRA	50	140
Jad Khoury Infectious Disease · Saint Louis, MO	43	143
Toni Roth Diagnostic Radiology · Saint Louis, MO	41	116
CREPPS, LOUIS	34	89
STICKLEY, LOUIS	32	90
Colleen Spieler Diagnostic Radiology · Saint Louis, MO	32	77
James Nepute Diagnostic Radiology · Saint Louis, MO	31	104
Kerri Harting Diagnostic Radiology · Plymouth, MN	30	83
Deryk Mcdowell Cardiology · Saint Louis, MO	30	82
Cindy Zhang Diagnostic Radiology · Saint Louis, MO	27	69
Jason Skyles Diagnostic Radiology · Saint Louis, MO	27	75

Refers patients to

Outbound — where patients go next

No outbound pairs above the suppression threshold.

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