What is Aaron Fieker's specialty?

Aaron Fieker (NPI 1326268079) is a Medicare-billing provider whose primary specialty is Gastroenterology in Tulsa, OK.

Where does Aaron Fieker practice?

Aaron Fieker practices in Tulsa, OK, based on the location reported in the CMS Medicare provider datasets for NPI 1326268079.

How much does Medicare pay Aaron Fieker?

Aaron Fieker (NPI 1326268079) received approximately $114K in total Medicare Part B payments, serving 665 beneficiaries, per the CMS Medicare Physician & Other Practitioners dataset.

PROVIDER PROFILE · NPI 1326268079

Aaron FiekerD.O.

GastroenterologyTulsa, OKI

MEDICARE UTILIZATION · PART B · 2024

Total beneficiaries

1,001

Unique beneficiaries

—

Total services

1,034

Distinct HCPCS

Medicare payment

$101K

Peer benchmark

Total Medicare services vs. 106 Gastroenterology providers in OK — above median (cohort median 983).

PRESCRIBING · PART D · 2024

Total Rx claims

1,512

Beneficiaries

—

Total drug cost

$1.7M

Distinct drugs

Brand share

47.4%

Top prescribed drugs

Pantoprazole Sodium205 claims

Omeprazole203 claims

Peg3350/Sod Sulf,bicarb,cl/Kcl197 claims

Peg3350/Sod Sulf,bicarb,cl/Kcl117 claims

Sodium, Potassium,mag Sulfates69 claims

QUALITY · MIPS · 2024

No data available for this provider in 2024.

INDUSTRY PAYMENTS · OPEN PAYMENTS · 2025

Total received

$2K

Payment records

112

By payment type

Food and Beverage$2K

Top paying entities

Food and Beverage$2K

FACILITY AFFILIATIONS

Hospital & Facility Affiliations (5)

Hospital

Hospital

Hospital

Hospital

Hospital

REFERRAL NETWORK

Where Aaron Fieker'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). 17 inbound referrers · 25 outbound destinations.

Receives referrals from

Inbound — who sends patients here

Physician	Patients	Visits
ST JOHN MEDICAL CENTER INC	276	706
REGIONAL MEDICAL LABORATORY, INC	111	375
COLE, MICHAEL	40	83
Zachary Chonka Diagnostic Radiology · Tulsa, OK	35	47
Kevin Baker Diagnostic Radiology · Grand Rapids, MI	26	45
OWASSO MEDICAL FACILITY, INC	25	45
John Morelli Diagnostic Radiology · Tulsa, OK	23	36
ST. JOHN BROKEN ARROW, INC	22	40
CHAIN, VICKI	22	41
Lisa Hayes Diagnostic Radiology · Tulsa, OK	21	31
Centurion Health Systems, Inc Ambulance Service Provider · Owasso, OK	18	27
Mark Trimble Cardiology · Tulsa, OK	15	25

Refers patients to

Outbound — where patients go next

Physician	Patients	Visits
ST JOHN MEDICAL CENTER INC	118	239
REGIONAL MEDICAL LABORATORY, INC	117	367
Kanwaljit Aulakh Pathology · Tulsa, OK	47	112
LAUGHLIN, RICHARD	40	66
John Fitter Diagnostic Radiology · Tulsa, OK	36	72
Emergency Medical Services Authority Ambulance Service Provider · Tulsa, OK	35	63
James Taylor Pathology · Tulsa, OK	35	78
Zachary Chonka Diagnostic Radiology · Tulsa, OK	32	46
Steven Casner Pathology · Tulsa, OK	29	62
Rodney Shaffer Diagnostic Radiology · Greenville, SC	29	45
Kevin Baker Diagnostic Radiology · Grand Rapids, MI	26	43
COLE, MICHAEL	26	42

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