Mark Gwynne, MD
NPI 1639275100 · Family Medicine Physician · Chapel Hill, NC
Enrolled with Medicare as Practitioner - Family Practice · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Mark Gwynne, MD is a Family Medicine Physician provider in Chapel Hill, NC (NPI 1639275100).
Provider details
- NPI number
- 1639275100
- Entity type
- Individual
- Primary specialty
- Family Medicine PhysicianAllopathic & Osteopathic Physicians
- Credential
- MD
- Sex
- Male
- Sole proprietor
- No
- License
- 200400038 (NC)
Specialties & taxonomies
Allopathic & Osteopathic Physicians
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure28% of score
19 yrs in NPPES registry
- Profile completeness28% of score
100% of core fields populated
- Practice footprint17% of score
1 documented practice location
- Medicare service volume (vs. specialty peers)28% of score
32 Medicare services, 2024 (ranked within specialty)
Medicare volume is ranked against active providers in the same specialty. Signals a provider has no public data for (e.g. Medicare claims) are left out of the score entirely — never counted as zero — so providers without that data are not penalized. See the full formula and weights in our methodology.
What this provider does (Medicare)
Based on Medicare fee-for-service claims, 2024; not all care is captured.
| Service (HCPCS) | Medicare services | Typical Medicare-allowed (2024) |
|---|---|---|
| Established Patient Office Or Other Outpatient Visit With Moderate Level of Decision Making, If Using Time, 30 Minutes Or More99214 | 32 | $115 |
Typical Medicare-allowed amounts for these services range $115–$115 (2024). The Medicare-allowed amount is what Medicare recognizes for a service under fee-for-service — a reference figure for 2024, not a price quote and not what you would be billed. Medicare Part B covers roughly an eighth of all NPIs (65+ skew); services with fewer than 11 beneficiaries are suppressed by CMS. Source: CMS Medicare Physician & Other Practitioners, by Provider & Service.
What this provider prescribes (Medicare Part D)
Top drugs by Medicare Part D claim volume, 2024 · 22 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Amlodipine Besylate | 69 | 21 |
| Atorvastatin Calcium | 45 | 14 |
| Oxycodone Hcl | 29 | — |
| Omeprazole | 29 | — |
| Metoprolol Succinate | 24 | — |
| Gabapentin | 23 | — |
| Furosemide | 22 |
Practice location
Mailing address
Registry dates
- Enumerated
- 2006-09-15
- Last updated
- 2021-03-31
- Certified
- 2021-03-31
Frequently asked questions
- What is Mark Gwynne's NPI number?
- Mark Gwynne's National Provider Identifier (NPI) is 1639275100, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Mark Gwynne's specialty?
- Mark Gwynne is listed in the NPPES registry with a primary specialty of Family Medicine Physician (Allopathic & Osteopathic Physicians).
- Where is Mark Gwynne located?
- Mark Gwynne's practice location on file with NPPES is 101 Manning Dr, Chapel Hill, NC 27599-0001.
- What is Mark Gwynne's phone number?
- The practice phone number listed in the NPPES registry for Mark Gwynne is (919) 966-4996.
- Does Mark Gwynne accept Medicare?
- Mark Gwynne is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Mark Gwynne's NPI active?
- Yes — Mark Gwynne's NPI (1639275100) is active in the NPPES registry as of the last update on 2021-03-31.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.