Barbara O'Callaghan, RN, NP
Oncology Registered Nurse · Lawrenceville, GA
Barbara O'Callaghan, RN, NP is an oncology registered nurse with a practice address in Lawrenceville, Georgia, and NPI 1003041104, issued on May 19, 2009. Check the license (Georgia RN139570, as entered in NPPES) with the Georgia board that licenses this profession; the Medicare figures below come from public CMS files.
- Name
- Barbara O'Callaghan
- Credential
- RN, NP
- Primary taxonomy
- Oncology Registered Nurse 163WX0200X
- License number
- RN139570 GA
Self-reported in NPPES; status is on the state search - Practice location
- 631 Professional Drive, Lawrenceville, GA 30046
- Phone
- (770) 963-8030
- Enumerated
- May 19, 2009
- Record last updated
- Feb 3, 2010 (not updated in 16 years: call before relying on the address or phone)
- Fax
- (770) 339-9577
- Medicare enrollment
- Enrolled (PECOS I20100714000353); accepts Medicare assignment
- Entity
- Type 1 · individual
8 nearest oncology registered nurse records → All 20 in Georgia → Look up another NPI →
Also registered at 631 Professional Drive
A shared address usually means a shared clinic or building; it does not show who employs whom.
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- John Chandler, PASurgical Physician Assistant1639226178
- James Elsey, M.D.Vascular Surgery Physician1932107349
- Christopher Hagenstad, M.D.Hematology & Oncology Physician1659460244
- Anthony Landis, D.O.Hematology & Oncology Physician1821187436
- Wallace Martin, MDSurgery Physician1487651386
Verify Barbara O'Callaghan in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersWhich Georgia board licenses this profession
Search for license RN139570Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
15% more Medicare Part D claims than the average oncology registered nurse in 2024
624 Medicare Part D claims for 156 beneficiaries, against an average of 542 among the 22 providers of this specialty who prescribed in Part D. Brand-name drugs were 12% of claims. 41 claims were for opioids.
Most prescribed
- Anastrozole55 claims
- Lorazepam32 claims
- Tramadol Hcl32 claims
- Eliquis23 claims
- Pantoprazole Sodium22 claims
- Duloxetine Hcl20 claims
Source: CMS Medicare Part D Prescribers by Provider and Drug, 2024 (data.cms.gov). Part D covers prescriptions for Medicare patients only; drugs with fewer than 11 claims are not published.
Industry payments in 2024: $1,589.05
67 payments; by number, the most common kind was food and beverage; the largest payer was Novartis Pharmaceuticals Corporation. The 32 providers of this specialty with any payment received $1,637.98 on average. Payments are reported by manufacturers, not by the provider, and are not a sign of wrongdoing.
Source: CMS Open Payments, program year 2024 (openpaymentsdata.cms.gov); average among providers of this specialty with at least one payment.
Bills Medicare through one group practice
- North Atlanta Oncology Services LLCDacula, GA
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Barbara O'Callaghan among 20 oncology registered nurse records in Georgia
Barbara O'Callaghan, RN, NP is one of 20 oncology registered nurse records with a practice address in Georgia. 20% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2009, is newer than 0% of them.
- NPI issued2009 · 0% of these records are older, 90% newer
- In a Medicare fileYes · 20% of these records are
- In the CMS Doctors and Clinicians fileYes · 15% of these records are
- Record last updated2010 · 25% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 163WX0200X and a Georgia practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
Oncology Registered Nurse providers in Georgia
There are 20 oncology registered nurse records in Georgia.
All 20 in Georgia → Every provider in Lawrenceville → Oncology Registered Nurse nationwide →
The 8 oncology registered nurse records with the nearest ZIP codes
- Kelly Jackson, N.P.Lawrenceville, GA 300461174761498
- Mary Gullatte, PHD, MSN, RNMarietta, GA 300621356268601
- Karlene PryceCovington, GA 300141902129380
- Rena Stewart, DNPStone Mountain, GA 300871700646445
- Alice Kerber, MN, APRN, AGN-BCAtlanta, GA 303031235597337
- Guylene Lea Toukam KuemoAtlanta, GA 303081104761469
- Laura BealsAtlanta, GA 303181477158699
- Gabriela CarrascoAtlanta, GA 303221487519369
Common questions
What is Barbara O'Callaghan, RN, NP's NPI number?
Barbara O'Callaghan, RN, NP's National Provider Identifier (NPI) is 1003041104, issued on May 19, 2009. An NPI identifies a provider in billing; it is not a license.
Where is Barbara O'Callaghan, RN, NP located?
The NPPES record lists a practice address at 631 Professional Drive, Lawrenceville, GA, 30046. Phone: (770) 963-8030. Providers update this record themselves, so call before visiting.
How can I verify Barbara O'Callaghan, RN, NP's license?
NPPES lists Georgia license number RN139570, as entered by the provider. Search the Georgia board that licenses this profession; the NPPES record confirms identity only.
How much does Barbara O'Callaghan, RN, NP prescribe under Medicare Part D?
In 2024, Barbara O'Callaghan, RN, NP had 624 Medicare Part D claims for 156 beneficiaries; the average among oncology registered nurse prescribers was 542. Part D covers Medicare prescriptions only.
Source: CMS National Plan and Provider Enumeration System (NPPES), file of Aug 9, 2026 (NPPES files on CMS.gov); NUCC Health Care Provider Taxonomy. Medicare files from data.cms.gov. An NPI identifies who bills; it is not a license.
Figures on PlainDoctor are read from the federal files each page names (CMS NPPES, Medicare Part D, MIPS, Open Payments; the HHS-OIG exclusion list only as counts) and from Census population estimates, with the file date shown beside them. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error. Data current as of Aug 9, 2026.