Dr. John Clark
- Gender: Male
- Experience: 19 years
- Graduated from: University Of Alabama School Of Medicine
- Graduation year: 2002
- Sole propriator: Yes
- NPI: 1578631784
Dr. John Clark M.D.
Nephrologist
He is located at 2780 Bob Wallace Avenue in Huntsville, AL 35805. Can help patients with the following: Acute Pain, Asthma, Chronic Obstructive Pulmonary Disease (COPD), Gastroesophageal Reflux Disease (GERD), Hiatal Hernia, Kidney Infection. His National Provider Identifier (NPI) number is 1578631784. Appointment can be made via the phone number (256) 533-4626. He is affiliated with 2 practices and 3 hospitals.
Conditions treated
Dr. John Clark, being an nephrologist, treats the following conditions. Please be advised that this list may not be complete. For the full list of conditions treated, consult directly with Dr. John Clark.
- Abdominal Pain
- Acute Pain
- Anemia
- Arthritis
- Asthma
- Atherosclerosis
- Bladder Control
- Blood in Urine
- Chest Pain
- Cholecystitis
- Chronic Obstructive Pulmonary Disease (COPD)
- Common Cold
- Constipation
- Cystitis
- Diarrhea
- Edema
- Fever
- Gastroesophageal Reflux Disease (GERD)
- General Care
- Gout
- Headache
- Heart Disease
- Hemolytic Uremic Syndrome (HUS)
- Hiatal Hernia
- High Blood Pressure
- Hot Flashes
- Hydronephrosis
- Hypercalcemia
- Hyperkalemia
- Hyperlipidemia
- Hyperparathyroidism
- Hyponatremia
- Influenza
- Inguinal Hernia
- Kidney Cancer
- Kidney Failure
- Kidney Infection
- Kidney Stones
- Low Blood Pressure
- Low Potassium
- Migraine
- Nausea and Vomiting
- Obesity
- Osteoporosis
- Peptic Ulcer
- Polycystic Kidney Disease (PKD)
- Prescription Refill
- Rhabdomyolysis
- Urethritis
- Urinary Tract Infection (UTI)
- Vitamin D Deficiency
Procedures Performed by Dr. John Clark
ACA Marketplace (Obamacare/HealthCare.gov) plan networks
Insurers selling ACA Marketplace (HealthCare.gov) plans list Dr. John Clark as in-network for the following 2026 plans.
Health plans
Ambetter of Alabama
Network data as of Sep 15, 2026, as reported by the insurer.
Show all 18 plans from Ambetter of Alabama
| Plan | Plan type | Network tier | New patients |
|---|---|---|---|
| Complete Gold | EPO · Gold | Preferred | Accepting new patients |
| Complete Gold + Vision + Adult Dental | EPO · Gold | Preferred | Accepting new patients |
| Elite Bronze | EPO · Expanded Bronze | Preferred | Accepting new patients |
| Elite Bronze + Vision + Adult Dental | EPO · Expanded Bronze | Preferred | Accepting new patients |
| Elite Gold | EPO · Gold | Preferred | Accepting new patients |
| Elite Gold + Vision + Adult Dental | EPO · Gold | Preferred | Accepting new patients |
| Enhanced Diabetes Care Silver with $0 Drug Options | EPO · Silver | Preferred | Accepting new patients |
| Enhanced Diabetes Care Silver with $0 Drug Options + Vision + Adult Dental | EPO · Silver | Preferred | Accepting new patients |
| Everyday Bronze | EPO · Expanded Bronze | Preferred | Accepting new patients |
| Everyday Bronze + Vision + Adult Dental | EPO · Expanded Bronze | Preferred | Accepting new patients |
| Focused Silver | EPO · Silver | Preferred | Accepting new patients |
| Focused Silver + Vision + Adult Dental | EPO · Silver | Preferred | Accepting new patients |
| Standard Expanded Bronze | EPO · Expanded Bronze | Preferred | Accepting new patients |
| Standard Expanded Bronze + Vision + Adult Dental | EPO · Expanded Bronze | Preferred | Accepting new patients |
| Standard Gold | EPO · Gold | Preferred | Accepting new patients |
| Standard Gold + Vision + Adult Dental | EPO · Gold | Preferred | Accepting new patients |
| Standard Silver | EPO · Silver | Preferred | Accepting new patients |
| Standard Silver + Vision + Adult Dental | EPO · Silver | Preferred | Accepting new patients |
Oscar Insurance Company
Network data as of Sep 15, 2026, as reported by the insurer.
Show all 9 plans from Oscar Insurance Company
| Plan | Plan type | Network tier | New patients |
|---|---|---|---|
| Bronze Classic 4700 | EPO · Expanded Bronze | Preferred | Accepting new patients |
| Bronze Classic Standard | EPO · Expanded Bronze | Preferred | Accepting new patients |
| Bronze Elite + PCP Saver Plus | EPO · Expanded Bronze | Preferred | Accepting new patients |
| Bronze Simple Chronic Care CKM | EPO · Expanded Bronze | Preferred | Accepting new patients |
| Gold Classic Standard | EPO · Gold | Preferred | Accepting new patients |
| Gold Simple | EPO · Gold | Preferred | Accepting new patients |
| Silver Classic Standard | EPO · Silver | Preferred | Accepting new patients |
| Silver Simple | EPO · Silver | Preferred | Accepting new patients |
| Silver Simple Chronic Care CKM | EPO · Silver | Preferred | Accepting new patients |
This covers ACA Marketplace plans only, as reported by each insurer. It does not include employer, Medicare Advantage, or state-run exchange plans, and a plan missing from this list does not mean Dr. John Clark is out of network. Insurer directories can be out of date, so always confirm with the insurer and the office before your visit.
Medicare Enrollment
Dr. John Clark is enrolled to bill Medicare as a Practitioner - Nephrology .
Bills through: Nephrology Consultants Llc
Based on Medicare's public enrollment records as of Jul 17, 2026. This reflects Medicare fee-for-service enrollment only and says nothing about other insurance, quality, outcomes, or board certification.
Payments received
Drug payment
| Amgen | $299 |
| Otsuka Pharmaceutical | $258 |
| Relypsa | $236 |
Other
| Food and Beverage | $2049 |
Studies
UNIVERSITY OF ALABAMA SCHOOL OF MEDICINE
Graduated in 2002Additional Specialities
- Internist
Looking for more Nephrologists?
There are 7 other nephrologists in this region.
- Gender: Male
- Address: 2780 Bob Wallace Avenue Southwest Huntsville, 35805, AL
- Gender: Male
- Address: 2780 Bob Wallace Avenue Southwest Huntsville, 35805, AL
- Gender: Male
- Address: 2780 Bob Wallace Avenue Southwest Huntsville, 35805, AL
- Gender: Male
- Address: 2780 Bob Wallace Avenue Southwest Huntsville, 35805, AL
- Gender: Male
- Address: 2780 Bob Wallace Avenue Southwest Huntsville, 35805, AL
- Gender: Male
- Address: 2780 Bob Wallace Avenue Southwest Huntsville, 35805, AL
- Gender: Male
- Address: 2780 Bob Wallace Avenue Southwest Huntsville, 35805, AL
Questions & Answers
What conditions does Dr. John Clark treat?
Dr. John Clark provides treatment for Acute Pain, Asthma, Chronic Obstructive Pulmonary Disease (COPD), Gastroesophageal Reflux Disease (GERD), Hiatal Hernia, Kidney Infection. For the full list see this list.
Where can you meet with Dr. John Clark?
Dr. John Clark's office is located at 2780 Bob Wallace Avenue in Huntsville, AL 35805.
Has Dr. John Clark affiliation with hospitals?
Dr. John Clark is affiliated with HUNTSVILLE HOSPITAL. For the full list of hospitals see this list.
Does Dr. John Clark have affiliation with practices?
Dr. John Clark is affiliated with Huntsville Center for Sight. For the full list of practices see this list.
Does Dr. John Clark accept patients with Oscar Insurance Company?
Yes, Dr. John Clark is listed in-network for Oscar Insurance Company through the ACA Marketplace (Obamacare/HealthCare.gov). See the Marketplace plans section for details.