Barbara B. O'Callaghan, NP, RN
- Medicare patients, 2024
- 171
- Part D claims, 2024
- 624
- Hospital affiliations
- 2
- Industry payments
- $469
- Medical groups
- 3
- Practice address
- 1000 Johnson Ferry Road, NE, Atlanta, GA 30342
- Practice phone
- Call (404) 851-8000
- Professional email
- Get professional email
- Personal email
- Get personal email
- Mobile number
- Get mobile number
Primary practice
Find Barbara O'Callaghan's professional email, personal email and mobile number
Dmand AI checks each channel through healthcare-specific waterfall enrichment. See what is on file with a free account, with practice phones, licenses and affiliations.
Barbara B. O'Callaghan is an oncology registered nurse in Atlanta, Georgia
Barbara O'Callaghan practices at Northside Hospital Atlanta in Atlanta, Georgia, part of Northside Hospital.
Barbara O'Callaghan's NPI, 1003041104, was assigned on May 19, 2009. Barbara O'Callaghan holds Georgia license RN139570.
- NPI
- 1003041104NPI Registry (opens in a new tab)
- Medicare PAC ID
- 0941332738
- NPI enumeration date
- May 19, 2009
- NPI status
- Active
- Accepts Medicare assignment
- Yes
- Practice phone
- (404) 851-8000
- Professional email
- Get email
- Personal email
- Get email
- Mobile number
- Get number
- Sex
- Female
- Estimated age
- 44
- Medical school graduation
- 2008
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; Dmand AI Affiliation Data; and Doctors and Clinicians National Downloadable File (CMS)
Barbara B. O'Callaghan practices at Northside Hospital Atlanta in Atlanta, Georgia
Barbara O'Callaghan's primary practice is Northside Hospital Atlanta, at 1000 Johnson Ferry Road, NE, Atlanta, GA 30342 in Fulton County. The practice phone is (404) 851-8000.
- Northside Hospital Atlanta1000 Johnson Ferry Road, NE, Atlanta, GA 30342 · Fulton CountyPhone(404) 851-8000
Source: Dmand AI Affiliation Data
Barbara B. O'Callaghan is affiliated with 5 sites of care and 3 medical groups
Barbara O'Callaghan's primary practice is Northside Hospital Atlanta in Atlanta, Georgia, part of Northside Hospital. Barbara O'Callaghan is also affiliated with Northside Hospital Duluth. The medical group on file is Northside Hospital Gwinnett. Dmand AI also links Barbara O'Callaghan to 2 more group practices and clinics, 2 medical groups and 1 ambulatory surgery center, each named with a free account.
Sources: Dmand AI Affiliation Data; and Dmand AI Org Hierarchy Data
Dmand AI tracks the EHR system at Barbara B. O'Callaghan's practice
Dmand AI tracks the electronic health record (EHR) system at each site where Barbara O'Callaghan practices, 5 sites in all. Vendor and product names are available with a free account.
| Site | EHR vendor and product |
|---|---|
| Northside Hospital Atlanta | Available with a free account |
| +4 more sites and 2 medical groups | Available with a free account |
Source: Dmand AI Technology Install Data
For health IT teams
Dmand AI maps EHR vendors, IT decision makers and buying committees across Northside Hospital and 6.2K+ hospitals, with verified contacts in the same login.
Barbara B. O'Callaghan is one of 2 oncology registered nurses in Georgia
Oncology is Barbara O'Callaghan's primary specialty in the NPI Registry, under taxonomy code 163WX0200X. Barbara O'Callaghan is licensed in Georgia.
Specialties and state licenses
- Oncology registered nurse, GeorgiaPrimary
Oncology registered nurses near Barbara O'Callaghan
Counts of oncology registered nurses with a Dmand AI profile, by place and practice. Each opens the list.
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; and Dmand AI Peer Benchmarks
Barbara B. O'Callaghan treated 171 Medicare patients in 2024, average age 75
CMS counts 171 Medicare patients who saw Barbara O'Callaghan in 2024. The largest group is 65 to 74, with 76 patients. 75% of them have high blood pressure, and 71% have high cholesterol. 6% are also on Medicaid. Their average risk score is 1.54, where 1.00 is the Medicare average, so they are sicker than most Medicare patients.
Across all payers, Dmand AI patient panel data puts Barbara O'Callaghan's median patient age at 65, with 68% women.
Barbara O'Callaghan's Medicare patients by age, 2024
CMS leaves out age groups with fewer than 11 patients.
Barbara O'Callaghan's Medicare patients by sex, 2024
- Women11869%
- Men5331%
Chronic conditions among Barbara O'Callaghan's Medicare patients, 2024
- High blood pressure75%
- High cholesterol71%
- Cancer60%
- Arthritis42%
- Chronic kidney disease32%
- Anxiety26%
- Diabetes25%
- Ischemic heart disease25%
Share of Medicare patients with each condition. A patient can have several.
Barbara O'Callaghan's patients across all payers
Dmand AI patient panel data covers Medicare, Medicaid and commercial patients.
Patient panel by age, all payers
Median age 65
Patient panel by sex, all payers
- Women68%
- Men32%
Sources: Dmand AI Patient Panel Data; and Medicare Physician & Other Practitioners - by Provider (CMS), 2024 data
Barbara B. O'Callaghan wrote 624 Medicare Part D claims in 2024
In 2024, Barbara O'Callaghan wrote 624 Medicare Part D claims for 156 patients. 88% of them were for generic drugs.
Barbara O'Callaghan's Part D claims by kind of drug, 2024
- Generic552 claims88%
- Brand-name72 claims12%
Drug classes CMS tracks in Barbara O'Callaghan's Part D claims, 2024
- Opioids7%41 of 624 claims
- Antibiotics4%26 of 624 claims
Share of all Part D claims for each drug class CMS reports on. Classes with no claims are left out.
Source: Medicare Part D Prescribers - by Provider (CMS), 2024 data
How Barbara B. O'Callaghan takes part in Medicare
Barbara O'Callaghan accepts Medicare assignment, so Medicare's approved amount is taken as full payment.
- Accepts Medicare assignment
- Yes
Source: Doctors and Clinicians National Downloadable File (CMS)
For MedTech and pharma teams
Filter 7.4M+ HCPs by Medicare procedures, Part D drugs and Open Payments history, then reach them with verified contacts in one login.
Barbara B. O'Callaghan received $469 in industry payments in 2025
CMS Open Payments shows 18 general payments to Barbara O'Callaghan from 14 drug and device companies in 2025. Food and beverage make up the largest share, 100% of the total. Daiichi Sankyo Inc. paid the most, $75.
Companies that paid Barbara O'Callaghan the most, 2025 to 2025
Share is of all general payments to this clinician.
Source: Open Payments (CMS), 2025 data, released July 7, 2026
Sources for Barbara B. O'Callaghan's profile data
| Data on this page | Source |
|---|---|
| NPI, name, sex, specialty and licenses | NPPES NPI Registry (CMS) (opens in a new tab)Dmand AI Professional Profile Data |
| Practice locations and phone | Dmand AI Affiliation Data |
| Primary practice, affiliations and health system | Dmand AI Affiliation DataDmand AI Org Hierarchy Data |
| Medicare patients and the all-payer patient panel | Dmand AI Patient Panel DataMedicare Physician & Other Practitioners - by Provider (CMS) (opens in a new tab) |
| Part D prescribing | Medicare Part D Prescribers - by Provider (CMS) (opens in a new tab) |
| MIPS scores, telehealth, assignment and procedure percentiles | Doctors and Clinicians National Downloadable File (CMS) (opens in a new tab) |
| Industry payments | Open Payments (CMS) (opens in a new tab) |
| EHR at each practice site | Dmand AI Technology Install Data |
| Similar physicians | Dmand AI Affiliation Data |
Data last refreshed October 2026Report an inaccuracyRemove my information
FAQ
Frequently asked questions about Barbara B. O'Callaghan
Spotted something out of date? Email hello@dmand.ai and we will check the record. Contact details live in the free trial.
What is Barbara B. O'Callaghan's NPI number?
Barbara B. O'Callaghan's NPI number is 1003041104. It was assigned on May 19, 2009, and it is active in the NPI Registry.
What does Barbara B. O'Callaghan specialize in?
Barbara B. O'Callaghan is an oncology registered nurse in Atlanta, Georgia. The primary specialty in the NPI Registry is Oncology Registered Nurse (taxonomy code 163WX0200X).
Where does Barbara B. O'Callaghan practice?
Barbara O'Callaghan practices at 1000 Johnson Ferry Road, NE, Atlanta, GA 30342. Barbara O'Callaghan's primary practice is Northside Hospital Atlanta in Atlanta, Georgia, part of Northside Hospital. Dmand AI also links Barbara O'Callaghan to 2 group practices and clinics, 2 medical groups and 1 ambulatory surgery center.
What is Barbara B. O'Callaghan's office phone number?
The practice phone on file for Barbara O'Callaghan is (404) 851-8000.
What is Barbara B. O'Callaghan's medical license number?
Barbara O'Callaghan holds Georgia license RN139570.
Which hospitals is Barbara B. O'Callaghan affiliated with?
Barbara O'Callaghan practices at Northside Hospital Atlanta in Atlanta, Georgia. Barbara O'Callaghan is also affiliated with Northside Hospital Duluth.
What medical group is Barbara B. O'Callaghan part of?
Barbara O'Callaghan is linked to Northside Hospital Gwinnett. Dmand AI links Barbara O'Callaghan to 2 more medical groups.
Does Barbara B. O'Callaghan accept Medicare?
Yes. CMS lists Barbara O'Callaghan as accepting Medicare assignment.
How many Medicare patients does Barbara B. O'Callaghan see?
CMS counts 171 Medicare patients who saw Barbara O'Callaghan in 2024, with an average age of 75.
Has Barbara B. O'Callaghan received payments from drug or device companies?
CMS Open Payments shows $469 in general payments to Barbara O'Callaghan from 14 companies from 2025 to 2025. The largest total came from Daiichi Sankyo Inc.
How long has Barbara B. O'Callaghan been practicing?
Barbara O'Callaghan graduated from medical school in 2008, 18 years ago.
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