What is Michael Callahan's specialty?

Michael Callahan (NPI 1548396492) is a Medicare-billing provider whose primary specialty is Gynecological Oncology in Indianapolis, IN.

Where does Michael Callahan practice?

Michael Callahan practices in Indianapolis, IN, based on the location reported in the CMS Medicare provider datasets for NPI 1548396492.

How much does Medicare pay Michael Callahan?

Michael Callahan (NPI 1548396492) received approximately $50K in total Medicare Part B payments, serving 118 beneficiaries, per the CMS Medicare Physician & Other Practitioners dataset.

PROVIDER PROFILE · NPI 1548396492

Michael CallahanMD

Gynecological OncologyIndianapolis, INI

MEDICARE UTILIZATION · PART B · 2024

Total beneficiaries

110

Unique beneficiaries

—

Total services

163

Distinct HCPCS

Medicare payment

$13K

Peer benchmark

Total Medicare services vs. 19 Gynecological Oncology providers in IN — above median (cohort median 292).

PRESCRIBING · PART D · 2024

Total Rx claims

134

Beneficiaries

—

Total drug cost

$205K

Distinct drugs

Brand share

38.8%

Top prescribed drugs

Letrozole30 claims

Ondansetron27 claims

Anastrozole16 claims

Betamethasone/Propylene Glyc14 claims

Megestrol Acetate12 claims

QUALITY · MIPS · 2024

No data available for this provider in 2024.

INDUSTRY PAYMENTS · OPEN PAYMENTS · 2025

Total received

$48

Payment records

By payment type

Food and Beverage$48

Top paying entities

Food and Beverage$48

REFERRAL NETWORK

Where Michael Callahan'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). 13 inbound referrers · 0 outbound destinations.

Receives referrals from

Inbound — who sends patients here

Physician	Patients	Visits
ST. VINCENT HOSPITAL & HEALTH CARE CENTER, INC.	205	1,313
INDIANA UNIVERSITY HEALTH BALL MEMORIAL HOSPITAL, INC.	53	313
Ameripath Indianapolis Pc Clinical Laboratory · Indianapolis, IN	25	58
MORTON, MICHAEL	22	69
Hubert Fornalik Gynecological Oncology · Indianapolis, IN	17	47
Terence Cudahy Pathology · Indianapolis, IN	16	38
ROTHBAUM, DONALD	16	47
Sadaf Hussain Hospitalist · Indianapolis, IN	14	37
ROONEY, SUZANNE	14	43
IOM HEALTH SYSTEM LP	13	35
INDIANA UNIVERSITY HEALTH INC	12	80
Stewart Worrell Diagnostic Radiology · Maywood, IL	11	27

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