Mark Greenwell, M.D.
NPI 1184681371 · Nephrology Physician · Paris, TX
Enrolled with Medicare as Practitioner - Nephrology · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Mark Greenwell, M.D. is a Nephrology Physician provider in Paris, TX (NPI 1184681371).
Provider details
- NPI number
- 1184681371
- Entity type
- Individual
- Primary specialty
- Nephrology PhysicianAllopathic & Osteopathic Physicians
- Credential
- M.D.
- Sex
- Male
- Sole proprietor
- No
- License
- 29498 (OK)
Specialties & taxonomies
Allopathic & Osteopathic Physicians
Allopathic & Osteopathic Physicians
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure25% of score
20 yrs in NPPES registry
- Profile completeness25% of score
100% of core fields populated
- Practice footprint15% of score
3 documented practice locations
- Medicare service volume (vs. specialty peers)25% of score
2,215 Medicare services, 2024 (ranked within specialty)
- Open Payments transparency10% of score
Has Open Payments disclosures (2024)
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 .
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 | 580 | $90 |
| 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 | 569 | $16 |
| Subsequent Hospital Care With Moderate Levelof Medical Decision Making, If Using Time, at Least 35 Minutes99232 | 351 | $75 |
| Dialysis Services, 4 Or More Physician Visits Per Month (20 Years Or Older)90960 | 251 | $335 |
| Dialysis Services, 2-3 Physician Visits Per Month (20 Years Or Older)90961 | 93 | $279 |
| Subsequent Hospital Care With Moderate Levelof Medical Decision Making, If Using Time, at Least 50 Minutes |
What this provider prescribes (Medicare Part D)
Top drugs by Medicare Part D claim volume, 2024 · 58 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Empagliflozinbrand: Jardiance | 174 | 39 |
| Losartan Potassium | 167 | 46 |
| Dapagliflozin Propanediolbrand: Farxiga | 137 | 36 |
| Amlodipine Besylate | 129 | 42 |
| Lisinopril | 118 | 40 |
| Furosemide | 114 | 47 |
| Chlorthalidone |
Transparency — industry payments
Based on CMS Open Payments, 2024; not all care is captured.
$23 across 1 record (Open Payments 2024)
Open Payments discloses payments and transfers of value (meals, travel, consulting, research, royalties) from drug and device makers to providers. This is a transparency signal, not a verdict — such payments are legal and common, and their presence is neither an endorsement nor a criticism. Source: CMS Open Payments, program year 2024.
Practice location
Mailing address
Additional practice locations (2)
- 1104 E Lincoln RdIdabel, OK 74745-7364Phone: (903) 785-3300Fax: (903) 785-3310
- 105 Medical Cir Bldg 3Sulphur Springs, TX 75482-2138Phone: (903) 785-3300Fax: (903) 785-3310
Registry dates
- Enumerated
- 2006-05-01
- Last updated
- 2023-04-20
- Certified
- 2023-04-20
Frequently asked questions
- What is Mark Greenwell's NPI number?
- Mark Greenwell's National Provider Identifier (NPI) is 1184681371, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Mark Greenwell's specialty?
- Mark Greenwell is listed in the NPPES registry with a primary specialty of Nephrology Physician (Allopathic & Osteopathic Physicians).
- Where is Mark Greenwell located?
- Mark Greenwell's practice location on file with NPPES is 635 Stone Ave, Paris, TX 75460-9342.
- What is Mark Greenwell's phone number?
- The practice phone number listed in the NPPES registry for Mark Greenwell is (903) 785-3300.
- Does Mark Greenwell accept Medicare?
- Mark Greenwell is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Mark Greenwell's NPI active?
- Yes — Mark Greenwell's NPI (1184681371) is active in the NPPES registry as of the last update on 2023-04-20.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.