Mark D. Gwynne, MD
Family Medicine Physician · Chapel Hill, NC
Mark D. Gwynne, MD is a family medicine physician with a practice address in Chapel Hill, North Carolina, and NPI 1639275100, issued on Sep 15, 2006. Check the license (North Carolina 200400038, as entered in NPPES) on the North Carolina Medical Board; the Medicare figures below come from public CMS files.
- Name
- Mark D. Gwynne
- Credential
- MD
- Primary taxonomy
- Family Medicine Physician 207Q00000X
- License number
- 200400038 NC
Self-reported in NPPES; status is on the state search - Practice location
- 101 Manning Dr, Chapel Hill, NC 27599
- Phone
- (919) 966-4996
- Enumerated
- Sep 15, 2006
- Record last updated
- Mar 31, 2021 (not updated in 5 years: call before relying on the address or phone)
- Fax
- (919) 843-5515
- Medicaid ID
- 89137AA NC
- Medicare enrollment
- Enrolled (PECOS I20040812001321); accepts Medicare assignment
- Entity
- Type 1 · individual
8 nearest family medicine physician records → All 4,953 in North Carolina → Look up another NPI →
Also registered at 101 Manning Dr
A shared address usually means a shared clinic or building; it does not show who employs whom.
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- Thaniyyah Ahmad, MDStudent in an Organized Health Care Education/Training Program1023454600
Verify Mark D. Gwynne in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersNorth Carolina Medical Board
Search for license 200400038Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
79% fewer Medicare Part D claims than the average family medicine physician in 2024
753 Medicare Part D claims for 58 beneficiaries, against an average of 3,544 among the 117,163 providers of this specialty who prescribed in Part D. 68 claims were for opioids.
Most prescribed
- Amlodipine Besylate69 claims
- Atorvastatin Calcium45 claims
- Omeprazole29 claims
- Oxycodone Hcl29 claims
- Metoprolol Succinate24 claims
- Gabapentin23 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
- University OF North Carolina AT Chapel HillChapel Hill, NC
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Mark D. Gwynne among 4,953 family medicine physician records in North Carolina
Mark D. Gwynne, MD is one of 4,953 family medicine physician records with a practice address in North Carolina. 79% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2006, is newer than 12% of them.
- NPI issued2006 · 12% of these records are older, 51% newer
- In a Medicare fileYes · 79% of these records are
- In the CMS Doctors and Clinicians fileYes · 63% of these records are
- Graduated2001 · median 2006 among the 3,104 with a school on file
- Record last updated2021 · 50% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 207Q00000X and a North Carolina practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
147 family medicine physician records list a practice address in Chapel Hill
They are 147 of the 7,608 NPPES records with a practice address in Chapel Hill, and 4,953 family medicine physician records in North Carolina.
All 4,953 in North Carolina → Every provider in Chapel Hill → Family Medicine Physician nationwide →
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Common questions
What is Mark D. Gwynne, MD's NPI number?
Mark D. Gwynne, MD's National Provider Identifier (NPI) is 1639275100, issued on Sep 15, 2006. An NPI identifies a provider in billing; it is not a license.
Where is Mark D. Gwynne, MD located?
The NPPES record lists a practice address at 101 Manning Dr, Chapel Hill, NC, 27599. Phone: (919) 966-4996. Providers update this record themselves, so call before visiting.
How can I verify Mark D. Gwynne, MD's license?
NPPES lists North Carolina license number 200400038, 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 Mark D. Gwynne, MD prescribe under Medicare Part D?
In 2024, Mark D. Gwynne, MD had 753 Medicare Part D claims for 58 beneficiaries; the average among family medicine physician prescribers was 3,544. 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.