What is Mark Fesler's specialty?

Mark Fesler (NPI 1235204066) is a Medicare-billing provider whose primary specialty is Hematology-Oncology in Saint Louis, MO.

Where does Mark Fesler practice?

Mark Fesler practices in Saint Louis, MO, based on the location reported in the CMS Medicare provider datasets for NPI 1235204066.

How much does Medicare pay Mark Fesler?

Mark Fesler (NPI 1235204066) received approximately $195K in total Medicare Part B payments, serving 258 beneficiaries, per the CMS Medicare Physician & Other Practitioners dataset.

PROVIDER PROFILE · NPI 1235204066

Mark FeslerMD

PRACTICEST LOUIS UNIVERSITYSee all providers at this practice →

Hematology-OncologySaint Louis, MOI

MEDICARE UTILIZATION · PART B · 2024

Total beneficiaries

391

Unique beneficiaries

—

Total services

1,452

Distinct HCPCS

Medicare payment

$173K

Peer benchmark

Total Medicare services vs. 155 Hematology-Oncology providers in MO — above median (cohort median 981).

PRESCRIBING · PART D · 2024

Total Rx claims

2,274

Beneficiaries

—

Total drug cost

$11.4M

Distinct drugs

Brand share

54.1%

Top prescribed drugs

Valacyclovir Hcl355 claims

Lenalidomide169 claims

Sulfamethoxazole/Trimethoprim165 claims

Acyclovir162 claims

Venetoclax159 claims

QUALITY · MIPS · 2024

Final MIPS score

77.9

Quality

69.0

Cost

50.9

Improvement activities

40.0

Promoting interop.

0.0

Payment adjustment

0.12%

Individual

INDUSTRY PAYMENTS · OPEN PAYMENTS · 2024

Total received

$193K

Payment records

134

By payment type

Compensation for services other than consulting, including serving as faculty or as a speaker at a venue other than a continuing education program$161K

Travel and Lodging$18K

Consulting Fee$11K

Food and Beverage$3K

Top paying entities

Compensation for services other than consulting, including serving as faculty or as a speaker at a venue other than a continuing education program$161K

Travel and Lodging$18K

Consulting Fee$11K

Food and Beverage$3K

FACILITY AFFILIATIONS

Hospital & Facility Affiliations (1)

CCN 260179

Hospital

REFERRAL NETWORK

Where Mark Fesler'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). 7 inbound referrers · 22 outbound destinations.

Receives referrals from

Inbound — who sends patients here

Physician	Patients	Visits
Steven Pincus Hematology-Oncology · Saint Louis, MO	23	238
Katherine Robbins Pathology · Saint Louis, MO	21	133
JALLAD, BASSEL	14	193
Nishant Poddar Hematology-Oncology · Ballwin, MO	14	135
GARRETT, ROBERT	14	84
Sagun Goyal Hematology-Oncology · St. Louis, MO	12	833
Yifan Tu Hematology-Oncology · St. Louis, MO	12	186

Refers patients to

Outbound — where patients go next

Physician	Patients	Visits
SLH VISTA, INC.	106	2,631
Razi Muzaffar Nuclear Medicine · Saint Louis, MO	28	60
Linda Goldenberg Nurse Practitioner · Saint Louis, MO	23	575
Karen Moser Pathology · Salt Lake City, UT	19	128
STAROS, ERIC	18	148
Steven Pincus Hematology-Oncology · Saint Louis, MO	18	203
Ece Akduman Diagnostic Radiology · Saint Louis, MO	16	86
John Richart Hematology-Oncology · St Louis, MO	15	217
Sagun Goyal Hematology-Oncology · St. Louis, MO	14	833
Carl Freter Hematology-Oncology · Spokane, WA	14	178
Katherine Robbins Pathology · Saint Louis, MO	14	137
Christina Doherty Diagnostic Radiology · Saint Louis, MO	13	46

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