What is John Callahan's specialty?

John Callahan (NPI 1952338048) is a Medicare-billing provider whose primary specialty is Orthopedic Surgery in Amherst, NY.

Where does John Callahan practice?

John Callahan practices in Amherst, NY, based on the location reported in the CMS Medicare provider datasets for NPI 1952338048.

How much does Medicare pay John Callahan?

John Callahan (NPI 1952338048) received approximately $84K in total Medicare Part B payments, serving 275 beneficiaries, per the CMS Medicare Physician & Other Practitioners dataset.

PROVIDER PROFILE · NPI 1952338048

John CallahanMD

Orthopedic SurgeryAmherst, NYI

MEDICARE UTILIZATION · PART B · 2024

Total beneficiaries

425

Unique beneficiaries

—

Total services

736

Distinct HCPCS

Medicare payment

$33K

Peer benchmark

Total Medicare services vs. 1,320 Orthopedic Surgery providers in NY — above median (cohort median 1,129).

PRESCRIBING · PART D · 2024

Total Rx claims

123

Beneficiaries

—

Total drug cost

$653

Distinct drugs

Brand share

69.9%

Top prescribed drugs

Hydrocodone/Acetaminophen75 claims

Cephalexin22 claims

Methylprednisolone15 claims

Sulfamethoxazole/Trimethoprim11 claims

QUALITY · MIPS · 2024

Final MIPS score

89.8

Quality

89.9

Cost

82.5

Improvement activities

40.0

Promoting interop.

88.0

Payment adjustment

0.62%

Group

INDUSTRY PAYMENTS · OPEN PAYMENTS · 2025

Total received

$362

Payment records

By payment type

Food and Beverage$191

Long term medical supply or device loan$171

Top paying entities

Food and Beverage$191

Long term medical supply or device loan$171

REFERRAL NETWORK

Where John 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). 7 inbound referrers · 0 outbound destinations.

Receives referrals from

Inbound — who sends patients here

Physician	Patients	Visits
ERIE COUNTY MEDICAL CENTER CORPORATION	66	311
MERCY HOSPITAL OF BUFFALO	34	101
Lasalle Ambulance Inc Ambulance Service Provider · Buffalo, NY	18	72
Nicolette Sciolino Physician Assistant · Amherst, NY	14	23
MILLER, S. DAVID	13	15
TIRONE, CHARLES	12	31
Jai Wadhwani Cardiology · Williamsville, NY	11	53

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