Clark Denniston, MD
NPI 1871698878 · Family Medicine Physician · Chapel Hill, NC
Enrolled with Medicare as Practitioner - Family Practice · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Clark Denniston, MD is a Family Medicine Physician provider in Chapel Hill, NC (NPI 1871698878).
Provider details
- NPI number
- 1871698878
- Entity type
- Individual
- Primary specialty
- Family Medicine PhysicianAllopathic & Osteopathic Physicians
- Credential
- MD
- Sex
- Male
- Sole proprietor
- No
- License
- 38928 (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
337 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 | 126 | $119 |
| Visit Complexity Inherent to Evaluation and Management Associated With Medical Care Services That Serve As the Continuing Focal Point for All Needed Health Care Services And/Or With Medical Care Services That Are Part of Ongoing Care Related to a Patient'SG2211 | 85 | $15 |
| Established Patient Office Or Other Outpatient Visit With Low Level OD Decision Making, If Using Time, 20 Minutes Or More99213 | 65 | $85 |
| Hemoglobin A1c Level83036 | 22 | $10 |
| Established Patient Office Or Other Outpatient Visit With High Level of Medical Decision Making, If Using Time, 40 Minutes Or More99215 | 14 | $169 |
| Administration of Influenza Virus Vaccine |
What this provider prescribes (Medicare Part D)
Top drugs by Medicare Part D claim volume, 2024 · 32 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Atorvastatin Calcium | 103 | 28 |
| Chlorthalidone | 45 | 13 |
| Losartan Potassium | 33 | 11 |
| Amlodipine Besylate | 32 | — |
| Metformin Hcl | 30 | — |
| Levothyroxine Sodium | 30 | — |
| Oxycodone Hcl | 27 |
Practice location
Mailing address
Registry dates
- Enumerated
- 2006-09-14
- Last updated
- 2021-03-31
- Certified
- 2021-03-31
Frequently asked questions
- What is Clark Denniston's NPI number?
- Clark Denniston's National Provider Identifier (NPI) is 1871698878, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Clark Denniston's specialty?
- Clark Denniston is listed in the NPPES registry with a primary specialty of Family Medicine Physician (Allopathic & Osteopathic Physicians).
- Where is Clark Denniston located?
- Clark Denniston's practice location on file with NPPES is 101 Manning Dr, Chapel Hill, NC 27599-0001.
- What is Clark Denniston's phone number?
- The practice phone number listed in the NPPES registry for Clark Denniston is (919) 966-4996.
- Does Clark Denniston accept Medicare?
- Clark Denniston is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Clark Denniston's NPI active?
- Yes — Clark Denniston's NPI (1871698878) 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.