Joseph Robert Zanga, MD
Internal Medicine Physician · Durham, NC
Joseph Robert Zanga, MD is an internal medicine physician with a practice address in Durham, North Carolina, and NPI 1841465366, issued on Apr 25, 2008. Check the license (North Carolina 122422, as entered in NPPES) on the North Carolina Medical Board; the Medicare figures below come from public CMS files.
- Name
- Joseph Robert Zanga
- Credential
- MD
- Primary taxonomy
- Internal Medicine Physician 207R00000X
- License number
- 122422 NC
Self-reported in NPPES; status is on the state search - Practice location
- Duke University Hospital Erwin RD, Durham, NC 27710
- Phone
- (919) 684-8111
- Enumerated
- Apr 25, 2008
- Record last updated
- Sep 17, 2025
- Medicare enrollment
- Enrolled (PECOS I20100123000132); accepts Medicare assignment
- Medical or professional school
- University Of North Carolina At Chapel Hill School Of Medicine, 2004
- Entity
- Type 1 · individual
8 nearest internal medicine physician records → All 4,056 in North Carolina → Look up another NPI →
Also registered at Duke University Hospital Erwin RD
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Nicholas Steinour, MDEmergency Medicine Physician1396911426
- Susan Steves, RDRegistered Dietitian1972321115
Verify Joseph Robert Zanga in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersNorth Carolina Medical Board
Search for license 122422Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
97% fewer Medicare Part D claims than the average internal medicine physician in 2024
95 Medicare Part D claims for 11 beneficiaries, against an average of 3,176 among the 108,855 providers of this specialty who prescribed in Part D. Brand-name drugs were 12% of 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.
Bills Medicare through one group practice
- Duke Health Integrated Practice IncDurham, NC
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Joseph Robert Zanga among 4,056 internal medicine physician records in North Carolina
Joseph Robert Zanga, MD is one of 4,056 internal medicine physician records with a practice address in North Carolina. 82% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2008, is newer than 57% of them.
- NPI issued2008 · 57% of these records are older, 39% newer
- In a Medicare fileYes · 82% of these records are
- In the CMS Doctors and Clinicians fileYes · 67% of these records are
- Graduated2004 · median 2004 among the 2,706 with a school on file
- Record last updated2025 · 48% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 207R00000X and a North Carolina practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
380 internal medicine physician records list a practice address in Durham
They are 380 of the 13,451 NPPES records with a practice address in Durham, and 4,056 internal medicine physician records in North Carolina.
All 4,056 in North Carolina → Every provider in Durham → Internal Medicine Physician nationwide →
The 8 internal medicine physician records with the nearest ZIP codes
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- Richard Frothingham, M.D.Durham, NC 277101912088493
- David Gallagher, MDDurham, NC 277101376575746
- Rania KazanDurham, NC 277101588748495
- James Kelly, MD, MBADurham, NC 277101922004191
- Mary Klotman, MDDurham, NC 277101003846411
Common questions
What is Joseph Robert Zanga, MD's NPI number?
Joseph Robert Zanga, MD's National Provider Identifier (NPI) is 1841465366, issued on Apr 25, 2008. An NPI identifies a provider in billing; it is not a license.
Where is Joseph Robert Zanga, MD located?
The NPPES record lists a practice address at Duke University Hospital Erwin RD, Durham, NC, 27710. Phone: (919) 684-8111. Providers update this record themselves, so call before visiting.
How can I verify Joseph Robert Zanga, MD's license?
NPPES lists North Carolina license number 122422, as entered by the provider. Search the North Carolina Medical Board at https://portal.ncmedboard.org/verification/search.aspx. The NPPES record confirms identity only; the state search shows license status, expiration and public orders.
How much does Joseph Robert Zanga, MD prescribe under Medicare Part D?
In 2024, Joseph Robert Zanga, MD had 95 Medicare Part D claims for 11 beneficiaries; the average among internal medicine physician prescribers was 3,176. 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.