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Edit this profileAt a glance
- 2780 Bob Wallace Avenue, Huntsville, AL 35805
About Dr. Clark
Based in Huntsville, AL, John A. Clark, M.D. is listed in the NPI registry under nephrology. John graduated from University of Alabama School of Medicine in 2002. John is also listed as specializing in internal medicine. According to Medicare claims data, John cared for 1,087 Medicare patients across 2,079 services. The services billed most often include subsequent hospital care with moderate levelof medical decision making, if using time, at least 35 minutes, established patient office or other outpatient visit with low level od decision making, if using time, 20 minutes or more, and 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'. NPI 1578631784 identifies this record in the national registry.
Factual summary compiled by Guide.md from public records; not written by this provider.
Education & Training
Specialty
Credentials & Licensing
Medicare information
Exactly as CMS reports it (National Downloadable File, Opt-Out Affidavits, Order & Referring). Not an insurance directory; confirm coverage with the office.
Contact Information
- (256) 533-4626
- Email not available
Practice Locations
2780 BOB WALLACE AVENUE
Huntsville, AL 35805
Conditions Commonly Evaluated or Treated
Within Nephrology generally. Availability varies by clinician, training and location — this profile has not been claimed, so nothing here is a personal claim by the provider.
Conditions
Most searched conditions
Acid-base disorders
Anatomical conditions
Autoimmune conditions
Blood disorders
Blood pressure
Cysts and growths
Diabetes complications
Dialysis complications
Electrolyte disorders
Fluid retention
Genetic disorders
Hormone disorders
Infections
Inflammatory conditions
Kidney damage
Kidney failure
Kidney filter diseases
Lab abnormalities
Metabolic disorders
Multi-organ conditions
Structural kidney issues
Symptoms
Urine abnormalities
Urine symptoms
Vascular conditions
Vascular kidney issues
Procedures & services
Most searched procedures
Consultations
Diagnostic tests
Diagnostics
Dialysis
Dialysis access
- Dialysis Access Physical Exam
- Dialysis Catheter Removal
- Dialysis Fistula Repair
- Temporary Dialysis Line Placement
Diet and nutrition
Imaging
Infusions
Interventional procedures
Lab tests
- 24-hour urine test
- Comprehensive Metabolic Panel
- Kidney Function Blood Test
- Parathyroid hormone monitoring
- Urine protein check
- Urine sediment test
Medication management
- Active Vitamin D Therapy
- Resistant Blood Pressure Medication Adjustment
- Steroid Therapy For Kidney Inflammation
Medication therapy
- Acid reducer treatment for kidneys
- Phosphate binder therapy
- Potassium lowering treatment
- Red blood cell booster injections
- Water pill adjustment
Patient education
Prevention
Procedures
Specialized therapies
Supportive care
Surgical procedures
Transplant care
Vascular access
Procedures Most Often Billed to Medicare
2,079 services · 1,087 patients · 21 distinct codes
| Procedure | Type | Code | Services | Compared with peers |
|---|---|---|---|---|
| Insertion of needle and/or tube into hemodialysis circuit and balloon dilation of dialysis segment with review by radiologist | Procedure | 36902 |
63 | As often as other peers in Nephrology |
| Insertion of tube into chest or arm artery, each first order branch | Procedure | 36215 |
36 | As often as other peers in Nephrology |
| Removal of tunneled central venous tube | Procedure | 36589 |
11 | Less often than most peers in Nephrology |
| Review by radiologist of arm or leg artery image | Imaging | 75710 |
25 | Less often than most peers in Nephrology |
| Ultrasonic guidance for blood vessel access | Imaging | 76937 |
18 | As often as other peers in Nephrology |
| Fluoroscopic guidance for insertion or removal of central vein access device | Imaging | 77001 |
16 | Less often than most peers in Nephrology |
| Hemodialysis procedure with physician evaluation | Treatment | 90935 |
222 | More than most peers in Nephrology |
| Home dialysis services per month (20 years or older) | Treatment | 90966 |
140 | More often than most peers in Nephrology |
| Dialysis procedure including 1 evaluation | Treatment | 90945 |
85 | More than most peers in Nephrology |
| Use of a drug to induce depression of consciousness by physician performing a procedure (5 years or older), initial 15 minutes | Treatment | 99152 |
52 | As often as other peers in Nephrology |
Source: CMS Medicare public data. Shows how often procedures were billed — not quality of care or patient satisfaction.
Related providers
Connections drawn from the registry and from what providers have told us. A link here is not a referral or an endorsement.
Other kidney specialists at this location 8
Same specialty, same street address — most likely the same department or group.
Also at this address 4
Providers at the same street address. Each files their own registry entry, so a shared practice often appears under several different names.
Other kidney specialists in Huntsville 7
Same specialty, same city.
More connections — 21 related providers in 3 groups
Trained at University of Alabama School of Medicine 8
Other providers in the same specialty who trained at the same institution.
Class of 2002 at University of Alabama School of Medicine 8
Providers who graduated from the same medical school in the same year.
Also performs Insertion of needle and/or tube into hemodialysis circuit and balloon dilation of dialysis segment with review by radiologist 5
Providers in AL who bill this service to Medicare most often.
Common questions
What kind of doctor is John A. Clark?
John A. Clark is a kidney specialist in Huntsville, AL. That is the designation recorded for this NPI in the federal registry, where it is listed as “Nephrology”.
NPI registry
What is John A. Clark's address?
John A. Clark is listed at 2780 Bob Wallace Avenue, Huntsville, AL 35805. Addresses come from the NPI registry and can lag a move, so confirm before travelling.
NPI registry
How can I make an appointment with John A. Clark?
The number on file is (256) 533-4626. Contact the office directly to confirm availability and scheduling.
NPI registry
What is John A. Clark's NPI number?
John A. Clark's National Provider Identifier is 1578631784. It is issued by the Centers for Medicare & Medicaid Services and is unique and permanent — it does not change if they move practice.
NPI registry
Where did John A. Clark train?
John A. Clark attended University of Alabama School of Medicine, graduating in 2002. This comes from the CMS National Downloadable File.
CMS public data
How long has John A. Clark been practicing?
John A. Clark has 24 years experience. Calculated from a graduation year of 2002, reported in the CMS National Downloadable File.
CMS public data
What procedures does John A. Clark perform?
According to Medicare billing data, John A. Clark performs procedures including insertion of needle and/or tube into hemodialysis circuit and balloon dilation of dialysis segment with review by radiologist, insertion of tube into chest or arm artery, each first order branch and removal of tunneled central venous tube; reads or performs imaging such as review by radiologist of arm or leg artery image and ultrasonic guidance for blood vessel access; provides treatments such as hemodialysis procedure with physician evaluation and home dialysis services per month, alongside routine visits and testing. This reflects Medicare patients only and is billing volume, not a measure of quality.
Medicare claims
Has John A. Clark confirmed this information?
Not yet. This profile is built from public federal data and has not been confirmed by John A. Clark. If this is you, claiming it is free.
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