Dr. Gregory O. Clark
- Gender: Male
- Experience: 22 years
- Sole propriator: No
- NPI: 1053363952
Dr. Gregory O. Clark M.D.
Endocrinologist
He is located at 355 West Dundee Road Suite 110 in Buffalo Grove, IL 60089. Can help patients with the following: Arthritis, Cushing's Syndrome, Gynecomastia, Hypothyroidism, Osteoporosis, Thyroid Disease. His National Provider Identifier (NPI) number is 1053363952. Appointment can be made via the phone number (847) 541-4878.
Conditions treated
Dr. Gregory O. Clark, being an endocrinologist, 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. Gregory O. Clark.
- Abdominal Pain
- Achondroplasia
- Acute Pain
- Addison's Disease
- Amyloidosis
- Anemia
- Arthritis
- Asthma
- Atherosclerosis
- Bladder Control
- Bone Loss
- Carcinoid Tumor
- Chest Pain
- Cholecystitis
- Chronic Obstructive Pulmonary Disease (COPD)
- Common Cold
- Constipation
- Cushing's Syndrome
- Cystitis
- Diabetes
- Diabetes Insipidus (DI)
- Diabetes Mellitus (DM) Type 1
- Diabetes Mellitus (DM) Type 2
- Diabetic Neuropathy
- Diarrhea
- Edema
- Fertility
- Fever
- Gastroesophageal Reflux Disease (GERD)
- General Care
- Goiter
- Graves' Disease
- Growth Hormone Imbalance
- Gynecomastia
- Headache
- Heart Disease
- Hiatal Hernia
- High Blood Pressure
- Hot Flashes
- Hypercalcemia
- Hyperglycemia
- Hyperlipidemia
- Hyperparathyroidism
- Hyperthyroidism
- Hypocalcemia
- Hypoglycemia
- Hyponatremia
- Hypoparathyroidism
- Hypothyroidism
- Influenza
- Inguinal Hernia
- Insulin Resistance (IR)
- Low Testosterone
- Metabolic Syndrome
- Migraine
- Nausea and Vomiting
- Obesity
- Osteoporosis
- Peptic Ulcer
- Prescription Refill
- Thyroid Cancer
- Thyroid Disease
- Thyroiditis
- Urethritis
- Urinary Tract Infection (UTI)
- Vitamin D Deficiency
- Wilson-Turner Syndrome
Payments received from industry
- $1,969.06 in general payments (consulting fees, meals, travel, gifts, etc.) across 40 payments
Meals, travel & gifts
| Category | Amount | Payments |
|---|---|---|
| Food and beverage | $1,704.26 | 34 |
| Gifts | $118.80 | 2 |
Other payments
| Category | Amount | Payments |
|---|---|---|
| Education | $146.00 | 4 |
Companies that paid this doctor
| Company | Amount | Payments |
|---|---|---|
| Mannkind Corporation | $623.92 | 15 |
| Abbott Laboratories | $409.10 | 7 |
| Tandem Diabetes Care, Inc. | $324.65 | 4 |
| SANOFI-AVENTIS U.S. LLC | $245.88 | 5 |
| Novo Nordisk Inc | $208.69 | 6 |
| Companion Medical, Inc. | $71.56 | 1 |
| Stryker Corporation | $48.33 | 1 |
| Sequel Med Tech, LLC | $36.93 | 1 |
Based on CMS Open Payments data collected as of Sep 10, 2026. This reflects only payments CMS classifies as reportable and published under the Physician Payments Sunshine Act - it is not a complete picture of every financial relationship, and it is not a comment on the quality of care Dr. Gregory O. Clark provides.
Additional Specialities
- Internist
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Questions & Answers
Where can you meet with Dr. Gregory O. Clark?
Dr. Gregory O. Clark's office is located at 355 West Dundee Road Suite 110 in Buffalo Grove, IL 60089.
What conditions does Dr. Gregory O. Clark treat?
Dr. Gregory O. Clark provides treatment for Arthritis, Cushing's Syndrome, Gynecomastia, Hypothyroidism, Osteoporosis, Thyroid Disease. For the full list see this list.