Affiliated with a Castle Connolly Top Hospital
Who is Dr. Fiedler, Internist in Lisle, IL?
What are Areas of Expertise for Dr. Fiedler?
Dr. John Fiedler, MD is a highly-rated, board-certified Internist known for expertly diagnosing, treating, and managing a wide array of related conditions and procedures. Utilizing the latest medical advancements and evidence-based practices, Dr. Fiedler empowers patients to confidently navigate their health journey, specializing in Preventive Medicine, Primary Care, Wellness Care, and comprehensive wellness support. Serving the Lisle, IL community, Dr. Fiedler is dedicated to enhancing lives through expert, patient-centered care.
Where did Dr. Fiedler go to medical school and complete their residency?
Residency: Univ Of Mi Hosps & Hlth Ctrs, Internal Medicine | University Of Michigan Hospitals | University of Michigan Program
Medical School: Loyola Univ of Chicago Stritch Sch of Med, Maywood Il | Loyola University Chicago Stritch School of Medicine
Is Dr. Fiedler board certified as an Internist?
Yes, Dr. John Fiedler, MD is board certified by the American Board of Internal Medicine
What languages does Dr. Fiedler speak?
Dr. Fiedler and their clinical team can communicate with patients in the following languages:
- English
- Korean
- Spanish
What conditions does an Internist like Dr. Fiedler typically treat?
As an Internist, Dr. Fiedler diagnoses, treats, and manages a wide range of conditions. This condition information is derived from anonymized insurance claims and highlights the medical conditions most commonly treated by Dr. Fiedler. It provides insight into the doctor’s areas of experience and expertise based on real-world patient encounters from the past two years, updated quarterly. Learn more about our claims-based healthcare methodology.
Also known as:
- High Blood Pressure
- Hypertension
- Primary Hypertension
- Essential Hypertension
ICD-10 Codes:
- I10: Essential (primary) hypertension
Also known as:
- Mixed High Cholesterol and Triglycerides
- Cholesterol
- Triglycerides
- Mixed hyperlipidemia
- Combined hyperlipidemia
- High lipids
ICD-10 Codes:
- E782: Mixed hyperlipidemia
Also known as:
- Mammogram for Breast Cancer Screening
- Health Screening
- Mammography
- Breast Cancer Screening (PDQ®)
- Mammograms
- Breast X-ray
- Breast Cancer Check
ICD-10 Codes:
- Z1231: Encounter for screening mammogram for malignant neoplasm of breast
Also known as:
- Vitamin D Deficiency
- Low Vitamin D Levels
- Lack of Vitamin D
- Hypovitaminosis D
ICD-10 Codes:
- E559: Vitamin D deficiency, unspecified
Also known as:
- Hypothyroidism
- Congenital hypothyroidism
- Hypothyroidism (Underactive Thyroid)
- Underactive Thyroid
- Low Thyroid Function
ICD-10 Codes:
- E039: Hypothyroidism, unspecified
Also known as:
- Antiphospholipid Syndrome
- Bleeding Disorder
- Antiphospholipid syndrome
- APS
- Hughes syndrome
- Sticky blood syndrome
ICD-10 Codes:
- D6861: Antiphospholipid syndrome
Also known as:
- High Fasting Blood Sugar
- Blood Glucose
- Impaired Fasting Glucose
- Prediabetes (Fasting)
- Borderline Diabetes (Fasting)
ICD-10 Codes:
- R7301: Impaired fasting glucose
Also known as:
- Routine Adult Health Checkup
- Health Checkup
- Adult physical exam
- Annual wellness visit for adults
- General adult medical exam
ICD-10 Codes:
- Z0000: Encounter for general adult medical examination without abnormal findings
What procedures does an Internist like Dr. Fiedler typically perform?
As an Internist, procedures performed by Dr. John Fiedler may include:
- Ambulatory Care Consultation
- Annual Check Up
- Annual Physical
- Aromatherapy
- Bladder and Bowel Management
- Blood Pressure Testing
- Bowel and Bladder Management
- Certified Medical Examination for Commercial Driver / Vessel Master
Please contact Dr. Fiedler's office directly to confirm care for your specific procedure, for more information, or to schedule a consultation.
Does Dr. Fiedler accept my insurance?
Dr. Fiedler accepts most major insurance plans. Important: Please call our office at (847) 742-3525 before your appointment to verify that your specific plan and network are accepted.
What insurance plans does Dr. Fiedler accept in Lisle, IL?
Dr. Fiedler in Lisle, IL accepts plans from many carriers. While this list is updated regularly, it is not a guarantee of coverage.
Top Insurances
Cigna Group
CVS Health (formerly Aetna)
Health Care Service Corporation
Humana
Medicare
Pharmacy Network Services
State of Illinois
UnitedHealth Group
View All Insurances
Where is Dr. Fiedler's office located?
Dr. John Fiedler's Primary Practice
430 Warrenville Rd Ste 210
Lisle, IL 60532
(847) 742-3525
What hospitals are Dr. Fiedler affiliated with?
Castle Connolly Top Hospital
This doctor is affiliated with a Castle Connolly Top Hospital.
Dr. Fiedler has admitting privileges at the following hospitals:
What is Dr. Fiedler's NPI number?A National Provider Identifier (NPI) is a unique ID number that identifies doctors and healthcare providers nationwide.
Dr. Fiedler's National Provider Identifier (NPI) number is 1487623716.
What common questions do patients ask about Dr. Fiedler?
Here are answers to patients Frequently Asked Questions (FAQ’s) about Dr. Fiedler
What is Dr. John Fiedler's specialty?
What does an Internist do?
A physician who provides long-term, comprehensive care in the office and the hospital, managing both common and complex illness of adolescents, adults and the elderly. Internists are trained in the diagnosis and treatment of cancer, infections and diseases affecting the heart, blood, kidneys, joints and digestive, respiratory and vascular systems. They are also trained in the essentials of primary care internal medicine, which incorporates an understanding of disease prevention, wellness, substance abuse, mental health and effective treatment of common problems of the eyes, ears, skin, nervous system and reproductive organs.