What is Barbara O'callaghan's specialty?

Barbara O'callaghan (NPI 1003041104) is a Medicare-billing provider whose primary specialty is Nurse Practitioner in Lawrenceville, GA.

Where does Barbara O'callaghan practice?

Barbara O'callaghan practices in Lawrenceville, GA, based on the location reported in the CMS Medicare provider datasets for NPI 1003041104.

How much does Medicare pay Barbara O'callaghan?

Barbara O'callaghan (NPI 1003041104) received approximately $27K in total Medicare Part B payments, serving 171 beneficiaries, per the CMS Medicare Physician & Other Practitioners dataset.

PROVIDER PROFILE · NPI 1003041104

Barbara O'callaghanRN, NP

Nurse PractitionerLawrenceville, GAI

MEDICARE UTILIZATION · PART B · 2024

Total beneficiaries

283

Unique beneficiaries

—

Total services

506

Distinct HCPCS

Medicare payment

$26K

Peer benchmark

Total Medicare services vs. 6,490 Nurse Practitioner providers in GA — above median (cohort median 244).

PRESCRIBING · PART D · 2024

Total Rx claims

259

Beneficiaries

—

Total drug cost

$17K

Distinct drugs

Brand share

15.4%

Top prescribed drugs

Anastrozole55 claims

Lorazepam32 claims

Tramadol Hcl32 claims

Apixaban23 claims

Pantoprazole Sodium22 claims

QUALITY · MIPS · 2024

No data available for this provider in 2024.

INDUSTRY PAYMENTS · OPEN PAYMENTS · 2025

Total received

$1K

Payment records

By payment type

Food and Beverage$1K

Top paying entities

Food and Beverage$1K

FACILITY AFFILIATIONS

Hospital & Facility Affiliations (1)

CCN 110161

Hospital

REFERRAL NETWORK

Where Barbara O'callaghan'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). 4 inbound referrers · 9 outbound destinations.

Receives referrals from

Inbound — who sends patients here

Physician	Patients	Visits
Bioreference Health, Llc Clinical Laboratory · Elmwood Park, NJ	29	166
Laboratory Corporation Of America Holdings Clinical Laboratory · Birmingham, AL	21	58
Justin Caughron Diagnostic Radiology · Lawrenceville, GA	13	53
Nanyoung Park Nurse Practitioner · Duluth, GA	11	97

Refers patients to

Outbound — where patients go next

Physician	Patients	Visits
NORTHSIDE HOSPITAL, INC.	134	1,544
Christopher Hagenstad Medical Oncology · Lawrenceville, GA	83	1,123
Bioreference Health, Llc Clinical Laboratory · Elmwood Park, NJ	53	311
NORTHSIDE HOSPITAL, INC.	44	178
Quest Diagnostics Clinical Laboratories Inc Clinical Laboratory · Tucker, GA	20	58
Laboratory Corporation Of America Holdings Clinical Laboratory · Birmingham, AL	15	38
Mohan Krishnamachary Internal Medicine · Johns Creek, GA	14	70
Nanyoung Park Nurse Practitioner · Duluth, GA	13	109
Justin Caughron Diagnostic Radiology · Lawrenceville, GA	11	38

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