Doctor profile · Federal record
Dr. John Clark, M.D.
Internal Medicine Physician (CMS: Nephrology) · Huntsville, AL
- NPI 1578631784
- Accepts Medicare
- 24 yrs in practice
- Male
- Solo practice
- No sanctions
Practice & contact
- Primary practice
-
2780 Bob Wallace Avenue
Huntsville, AL 358054104
(256) 533-4626
Credentials & registration
- NPI registered
- December 2006 — 20 yrs on file
- Profile last updated
- March 21, 2012
- Year of graduation
- 2002 — 24 yrs since
- Specialty taxonomy
- 207R00000X — NUCC code
- State license (1)
- Tennessee #MD0000040647
Federal sanctions & exclusions
No sanctions, exclusions or revocations on file
Checked against OIG LEIE on NPI 1578631784. Last verified May 11, 2026.Medicare procedures · 2023
Top services delivered
Total services
1,776
Distinct HCPCS
10
Medicare allowed
$262,752
| HCPCS | Description | Services | Patients | Avg allowed | |
|---|---|---|---|---|---|
99232 |
Subsequent hospital care with moderate levelof medical decision making, if using time, at least 35 minutes | 628 | 185 | $74 | |
99213 |
Established patient office or other outpatient visit, 20-29 minutes | 251 | 198 | $78 | |
90935 |
Hemodialysis procedure with physician evaluation | 175 | 52 | $66 | |
90966 |
Home dialysis services per month (20 years or older) | 118 | 23 | $273 | |
99223 |
Initial hospital care with moderate level of medical decision making, if using time, at least 75 minutes | 89 | 86 | $162 | |
90945 |
Dialysis procedure including 1 evaluation | 67 | 19 | $80 | |
90960 |
Dialysis services, 4 or more physician visits per month (20 years or older) | 57 | 12 | $331 | |
99214 |
Established patient office or other outpatient visit, 30-39 minutes | 47 | 36 | $93 | |
36902 |
Insertion of needle and/or tube into hemodialysis circuit and balloon dilation of dialysis segment with review by radiologist | 45 | 36 | $1,080 | |
99152 |
Use of a drug to induce depression of consciousness by physician performing a procedure (5 years or older), initial 15 minutes | 40 | 31 | $44 |
In context: peer comparison
Among 32 peers in this city , average services per provider: 142. This provider delivers 13× the peer median.Open Payments
Industry payments received
All-time total
$922
Transactions
40
Manufacturers
15
| Payer (manufacturer) | Industry | Txns | Amount |
|---|---|---|---|
| Vifor Pharma, Inc. | 4 | $104.95 | |
| Bayer Healthcare Pharmaceuticals Inc. | 5 | $103.33 | |
| Boehringer Ingelheim Pharmaceuticals, Inc. | 4 | $97.31 | |
| AstraZeneca Pharmaceuticals LP | 4 | $78.94 | |
| Travere Therapeutics, Inc. | 3 | $73.71 | |
| OPKO Pharmaceuticals, LLC | 4 | $72.96 | |
| Otsuka America Pharmaceutical, Inc. | 4 | $72.92 | |
| CALLIDITAS THERAPEUTICS US INC. | 3 | $55.07 | |
| AKEBIA THERAPEUTICS INC | 2 | $53.78 | |
| Novartis Pharmaceuticals Corporation | 2 | $47.62 | |
| CorMedix Inc. | 1 | $38.51 | |
| ANI Pharmaceuticals, Inc. | 1 | $31.52 | |
| Ardelyx, Inc. | 1 | $20.39 | |
| Lilly USA, LLC | 1 | $19.90 | |
| GlaxoSmithKline, LLC. | 1 | $17.82 |
By nature of payment
Medicare Part D · 2023
Top prescriptions
Total claims
999
Patients
241
Total drug cost
$276,054
| Drug | Type | Claims | Patients | Total cost |
|---|---|---|---|---|
| Paricalcitol | Generic | 147 | 43 | $42,358 |
| Losartan Potassium | Generic | 112 | 38 | $1,529 |
| Hydralazine Hcl | Generic | 84 | 23 | $1,092 |
| Furosemide | Generic | 82 | 25 | $383 |
| Sevelamer Carbonate | Generic | 82 | 21 | $13,128 |
| Amlodipine Besylate | Generic | 79 | 27 | $477 |
| Kerendia (Finerenone) | Brand | 78 | 13 | $59,986 |
| Allopurinol | Generic | 70 | 16 | $713 |
| Carvedilol | Generic | 69 | 21 | $704 |
| Nifedipine Er (Nifedipine) | Brand | 49 | 14 | $1,830 |
Frequently asked questions
What is Dr. John Clark's medical specialty?
Dr. John Clark practices Internal Medicine Physician in Huntsville, AL.
Where does Dr. John Clark practice?
Dr. John Clark practices at 2780 Bob Wallace Avenue, Huntsville, AL 358054104. Office phone: 2565334626.
What is Dr. John Clark's NPI?
Dr. John Clark's National Provider Identifier (NPI) is 1578631784, issued by NPPES.
Does Dr. John Clark accept Medicare assignment?
Yes. Dr. John Clark accepts Medicare assignment, meaning Medicare-allowed amounts are accepted as full payment for covered services.
What procedures does Dr. John Clark commonly perform?
Top Medicare-reported procedures in 2023: Subsequent hospital care with moderate levelof medical decision making (HCPCS 99232); Established patient office or other outpatient visit (HCPCS 99213); Hemodialysis procedure with physician evaluation (HCPCS 90935). Source: CMS Medicare Physician & Other Practitioners file.