Mark Dyson, MD
NPI 1639666480 · Emergency Medicine Physician · Greenville, NC
Enrolled with Medicare as Practitioner - Emergency Medicine · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Mark Dyson, MD is a Emergency Medicine Physician provider in Greenville, NC (NPI 1639666480).
Provider details
- NPI number
- 1639666480
- Entity type
- Individual
- Primary specialty
- Emergency Medicine PhysicianAllopathic & Osteopathic Physicians
- Credential
- MD
- Sex
- Male
- Sole proprietor
- No
- License
- 2021-02669 (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
8 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
273 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) |
|---|---|---|
| Emergency Department Visit With Moderate Level of Medical Decision Making99284 | 148 | $112 |
| Emergency Department Visit With High Level of Medical Decision Making99285 | 80 | $164 |
| Emergency Department Visit With Low Level of Medical Decision Making99283 | 34 | $66 |
| Critical Care, First 30-74 Minutes99291 | 11 | $198 |
Typical Medicare-allowed amounts for these services range $66–$198 (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 · 8 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Prednisone | 29 | 24 |
| Oxycodone Hcl | 23 | 23 |
| Ondansetronbrand: Ondansetron Odt | 22 | 22 |
| Methocarbamol | 13 | 11 |
| Amlodipine Besylate | 12 | — |
| Lisinopril | 12 | — |
| Atorvastatin Calcium | 11 |
Practice location
Mailing address
Registry dates
- Enumerated
- 2018-04-17
- Last updated
- 2021-09-30
- Certified
- 2021-01-04
Frequently asked questions
- What is Mark Dyson's NPI number?
- Mark Dyson's National Provider Identifier (NPI) is 1639666480, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Mark Dyson's specialty?
- Mark Dyson is listed in the NPPES registry with a primary specialty of Emergency Medicine Physician (Allopathic & Osteopathic Physicians).
- Where is Mark Dyson located?
- Mark Dyson's practice location on file with NPPES is 2100 Stantonsburg Rd, Greenville, NC 27834-2818.
- What is Mark Dyson's phone number?
- The practice phone number listed in the NPPES registry for Mark Dyson is (919) 625-5351.
- Does Mark Dyson accept Medicare?
- Mark Dyson is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Mark Dyson's NPI active?
- Yes — Mark Dyson's NPI (1639666480) is active in the NPPES registry as of the last update on 2021-09-30.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.