Mark Wess, M.D.
NPI 1861440042 · Internal Medicine Physician · Greenville, SC
Enrolled with Medicare as Practitioner - Internal Medicine · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Mark Wess, M.D. is a Internal Medicine Physician provider in Greenville, SC (NPI 1861440042).
Provider details
- NPI number
- 1861440042
- Entity type
- Individual
- Primary specialty
- Internal Medicine PhysicianAllopathic & Osteopathic Physicians
- Credential
- M.D.
- Sex
- Male
- Sole proprietor
- No
- License
- 35155 (SC)
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
20 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
250 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 | 101 | $120 |
| 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 | 78 | $16 |
| New Patient Office Or Other Outpatient Visit With Moderate Level of Medical Decision Making, If Using Time, 45 Minutes Or More99204 | 29 | $157 |
| Administration of Influenza Virus VaccineG0008 | 14 | $30 |
| Administration of Pneumococcal VaccineG0009 | 14 | $30 |
| Annual Wellness Visit, Includes a Personalized Prevention Plan of Service (pps), Subsequent Visit |
What this provider prescribes (Medicare Part D)
Top drugs by Medicare Part D claim volume, 2024 · 101 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Rosuvastatin Calcium | 247 | 120 |
| Amlodipine Besylate | 245 | 104 |
| Lisinopril | 225 | 105 |
| Atorvastatin Calcium | 222 | 103 |
| Gabapentin | 221 | 102 |
| Levothyroxine Sodium | 191 | 94 |
| Omeprazole |
Practice location
Mailing address
Registry dates
- Enumerated
- 2006-05-04
- Last updated
- 2026-03-25
- Certified
- 2026-03-25
Frequently asked questions
- What is Mark Wess's NPI number?
- Mark Wess's National Provider Identifier (NPI) is 1861440042, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Mark Wess's specialty?
- Mark Wess is listed in the NPPES registry with a primary specialty of Internal Medicine Physician (Allopathic & Osteopathic Physicians).
- Where is Mark Wess located?
- Mark Wess's practice location on file with NPPES is 3516 Highway 153, Greenville, SC 29611-7553.
- What is Mark Wess's phone number?
- The practice phone number listed in the NPPES registry for Mark Wess is (864) 729-6626.
- Does Mark Wess accept Medicare?
- Mark Wess is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Mark Wess's NPI active?
- Yes — Mark Wess's NPI (1861440042) is active in the NPPES registry as of the last update on 2026-03-25.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.