What is Mark Fesenmyer's specialty?

Mark Fesenmyer (NPI 1992770390) is a Medicare-billing provider whose primary specialty is Gastroenterology in Merrillville, IN.

Where does Mark Fesenmyer practice?

Mark Fesenmyer practices in Merrillville, IN, based on the location reported in the CMS Medicare provider datasets for NPI 1992770390.

How much does Medicare pay Mark Fesenmyer?

Mark Fesenmyer (NPI 1992770390) received approximately $126K in total Medicare Part B payments, serving 655 beneficiaries, per the CMS Medicare Physician & Other Practitioners dataset.

PROVIDER PROFILE · NPI 1992770390

Mark FesenmyerMD

PRACTICEINTERNAL MEDICINE ASSOCIATESSee all providers at this practice →

GastroenterologyMerrillville, INI

MEDICARE UTILIZATION · PART B · 2024

Total beneficiaries

1,054

Unique beneficiaries

—

Total services

1,213

Distinct HCPCS

Medicare payment

$113K

Peer benchmark

Total Medicare services vs. 249 Gastroenterology providers in IN — top quintile (cohort median 598).

PRESCRIBING · PART D · 2024

Total Rx claims

1,245

Beneficiaries

—

Total drug cost

$160K

Distinct drugs

Brand share

30.5%

Top prescribed drugs

Pantoprazole Sodium321 claims

Peg3350/Sod Sulf,bicarb,cl/Kcl219 claims

Omeprazole165 claims

Nortriptyline Hcl87 claims

Dicyclomine Hcl78 claims

QUALITY · MIPS · 2024

No data available for this provider in 2024.

INDUSTRY PAYMENTS · OPEN PAYMENTS · 2024

Total received

$1K

Payment records

By payment type

Food and Beverage$1K

Top paying entities

Food and Beverage$1K

REFERRAL NETWORK

Where Mark Fesenmyer'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). 101 inbound referrers · 0 outbound destinations.

Receives referrals from

Inbound — who sends patients here

Physician	Patients	Visits
Peter Mavrelis Gastroenterology · Hobart, IN	227	1,264
Ahmad Shughoury Gastroenterology · Merrillville, IN	217	1,176
John Gustaitis Diagnostic Radiology · Munster, IN	205	807
Edward Bok Diagnostic Radiology · Saint Louis, MO	153	818
THE METHODIST HOSPITALS, INC	143	338
Devang Doshi Diagnostic Radiology · Munster, IN	108	393
JEHA, MIKHAIL	105	337
Feng Zhang Diagnostic Radiology · Munster, IN	97	378
Kais Yehyawi Cardiology · Portage, IN	97	317
Charisa Spoo Diagnostic Radiology · Oak Lawn, IL	96	466
Eric Schulte Cardiology · Merrillville, IN	93	559
Abdul Kawamleh Cardiology · Portage, IN	75	290

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