Doctor profile · Federal record
Dr. Mark Greenwell, M.D.
Nephrology Physician (CMS: Nephrology) · Nephrology Physician · Paris, TX
- NPI 1184681371
- Accepts Medicare
- 27 yrs in practice
- Licensed in 2 states
- Male
- Group practice
- No sanctions
Practice & contact
Operates at 3 locations .
- Primary practice
-
635 Stone Ave
Paris, TX 754609342
(903) 785-3300
fax (903) 785-3310 - Additional location
-
1104 E Lincoln RD
Idabel, OK 747457364 - Additional location
-
105 Medical Cir Bldg 3
Sulphur Springs, TX 754822138 - Mailing address
-
1133 Medical Dr
Tyler, TX 757012130
Credentials & registration
- NPI registered
- May 2006 — 20 yrs on file
- Profile last updated
- April 20, 2023
- Year of graduation
- 1999 — 27 yrs since
- Specialty taxonomy
- 207RN0300X — NUCC code
- State licenses (2)
- Texas #P3725 · Oklahoma #29498
- Medicaid (2)
- OK #200452580 A · TX #3058059-01
Federal sanctions & exclusions
No sanctions, exclusions or revocations on file
Checked against OIG LEIE on NPI 1184681371. Last verified May 11, 2026.Medicare procedures · 2023
Top services delivered
Total services
2,134
Distinct HCPCS
10
Medicare allowed
$262,792
| HCPCS | Description | Services | Patients | Avg allowed | |
|---|---|---|---|---|---|
99214 |
Established patient office or other outpatient visit, 30-39 minutes | 506 | 354 | $91 | |
90970 |
Dialysis services, per day, less than full month service (20 years or older) | 406 | 24 | $9 | |
99232 |
Subsequent hospital care with moderate levelof medical decision making, if using time, at least 35 minutes | 358 | 109 | $76 | |
99233 |
Subsequent hospital care with moderate levelof medical decision making, if using time, at least 50 minutes | 295 | 127 | $113 | |
90960 |
Dialysis services, 4 or more physician visits per month (20 years or older) | 257 | 74 | $342 | |
90966 |
Home dialysis services per month (20 years or older) | 85 | 31 | $266 | |
90961 |
Dialysis services, 2-3 physician visits per month (20 years or older) | 65 | 49 | $286 | |
99204 |
New patient office or other outpatient visit, 45-59 minutes | 65 | 65 | $155 | |
99223 |
Initial hospital care with moderate level of medical decision making, if using time, at least 75 minutes | 53 | 50 | $162 | |
99215 |
Established patient office or other outpatient visit, 40-54 minutes | 28 | 26 | $146 |
In context: peer comparison
Among 3 peers in Paris Nephrology Physician, average services per provider: 174. This provider delivers 12× the peer median.Open Payments
Industry payments received
All-time total
$23
Transactions
1
Manufacturers
1
| Payer (manufacturer) | Industry | Txns | Amount |
|---|---|---|---|
| Boehringer Ingelheim Pharmaceuticals, INC. | 1 | $23.12 |
By nature of payment
Medicare Part D · 2023
Top prescriptions
Total claims
1,394
Patients
403
Total drug cost
$282,758
| Drug | Type | Claims | Patients | Total cost |
|---|---|---|---|---|
| Jardiance (Empagliflozin) | Brand | 221 | 37 | $162,918 |
| Losartan Potassium | Generic | 152 | 49 | $2,029 |
| Amlodipine Besylate | Generic | 124 | 42 | $877 |
| Farxiga (Dapagliflozin Propanediol) | Brand | 117 | 28 | $92,557 |
| Furosemide | Generic | 117 | 40 | $819 |
| Chlorthalidone | Generic | 102 | 31 | $1,151 |
| Lisinopril | Generic | 88 | 33 | $815 |
| Carvedilol | Generic | 80 | 23 | $1,046 |
| Sevelamer Carbonate | Generic | 72 | 27 | $16,827 |
| Spironolactone | Generic | 65 | 21 | $470 |
Hospital affiliations
Frequently asked questions
What is Dr. Mark Greenwell's medical specialty?
Dr. Mark Greenwell practices Nephrology Physician in Paris, TX.
Where does Dr. Mark Greenwell practice?
Dr. Mark Greenwell practices at 635 Stone Ave, Paris, TX 754609342. Office phone: 9037853300.
What is Dr. Mark Greenwell's NPI?
Dr. Mark Greenwell's National Provider Identifier (NPI) is 1184681371, issued by NPPES.
Does Dr. Mark Greenwell accept Medicare assignment?
Yes. Dr. Mark Greenwell accepts Medicare assignment, meaning Medicare-allowed amounts are accepted as full payment for covered services.
What procedures does Dr. Mark Greenwell commonly perform?
Top Medicare-reported procedures in 2023: Established patient office or other outpatient visit (HCPCS 99214); Dialysis services (HCPCS 90970); Subsequent hospital care with moderate levelof medical decision making (HCPCS 99232). Source: CMS Medicare Physician & Other Practitioners file.