44 Years of Experience
Accepting patients
Affiliated with a Castle Connolly Top Hospital
Who is Dr. Giesen, Internist in Darien, CT?
Dr. William Giesen, MD is an Internist, who primarily practices in Darien, CT. He has been practicing for over 44 years and is board certified by the American Board of Internal Medicine. Dr. Giesen completed his residency at Hartford Hosp, Internal Medicine. Dr. Giesen is fluent in English, and is currently seeing new patients. Dr. Giesen’s practice accepts Cigna, Medicaid, Medicare, UnitedHealthcare and other major insurance plans. To book an appointment or to confirm insurance options, please call Dr. Giesen’s office at (203) 655-2516.
Where did Dr. Giesen go to medical school and complete their residency?
Residency: Hartford Hosp, Internal Medicine
Medical School: Georgetown Univ Sch of Med, Washington Dc
Is Dr. Giesen board certified in Internist?
Yes, Dr. William Giesen, MD is board certified by the American Board of Internal Medicine
What languages does Dr. Giesen speak?
Dr. Giesen and their clinical team can communicate with patients in the following languages:
English
What conditions does Dr. Giesen treat?
As a Internist, Dr. Giesen 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. Giesen. 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.
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
Also known as:
- Abnormal Urine Test Results
- Urine and Urination
- Unusual urine findings
- Irregular urinalysis
- Abnormal pee test
ICD-10 Codes:
- R8290: Unspecified abnormal findings in urine
Also known as:
- High Blood Pressure
- Hypertension
- Primary Hypertension
- Essential Hypertension
ICD-10 Codes:
- I10: Essential (primary) hypertension
Also known as:
- High Cholesterol
- Cholesterol
- Triglycerides
- Hypercholesterolemia
- High blood cholesterol
- Elevated cholesterol
- Hyperlipidemia
- High lipids
- Dyslipidemia
ICD-10 Codes:
- E7800: Pure hypercholesterolemia, unspecified
- E785: Hyperlipidemia, unspecified
Also known as:
- Insomnia
- Sleeplessness
- Trouble sleeping
- Chronic insomnia
ICD-10 Codes:
- G4700: Insomnia, unspecified
Also known as:
- General Disorder Screening
- Health Screening
- General Health Check
- Disease Screening
- Medical Disorder Screening
ICD-10 Codes:
- Z1389: Encounter for screening for other disorder
Also known as:
- Anxiety Disorder
- Anxiety
- General Anxiety
- Anxiety Problems
- Nervous Disorder
ICD-10 Codes:
- F419: Anxiety disorder, unspecified
Also known as:
- Acute Bronchitis
- Chest cold
- Short-term bronchitis
- Acute chest infection
ICD-10 Codes:
- J209: Acute bronchitis, unspecified
Also known as:
- Other Specific Abnormal Blood Chemistry Results
- Blood
- Specified Blood Chemistry Imbalance
- Unusual Blood Chemistry Findings
- Specific Blood Panel Abnormalities
ICD-10 Codes:
- R7989: Other specified abnormal findings of blood chemistry
Also known as:
- Attention Deficit Hyperactivity Disorder
- Attention-deficit/hyperactivity disorder
- ADHD
- ADD
- Hyperactivity Disorder
ICD-10 Codes:
- F909: Attention-deficit hyperactivity disorder, unspecified type
Also known as:
- Blocked Earwax
- Ear Disorder
- Impacted earwax
- Earwax impaction
- Excess earwax
ICD-10 Codes:
- H6123: Impacted cerumen, bilateral
Also known as:
- COVID-19
- COVID-19 (Coronavirus Disease 2019)
- Coronavirus Disease 2019
- SARS-CoV-2 Infection
- Novel Coronavirus
ICD-10 Codes:
- U071: COVID-19
Also known as:
- Type 2 Diabetes
- Diabetes Type 2
- Type 2 diabetes
- Diabetes Mellitus Type 2
- Adult-Onset Diabetes
- Non-Insulin Dependent Diabetes
ICD-10 Codes:
- E119: Type 2 diabetes mellitus without complications
Also known as:
- Sinusitis
- Sinus Infection
- Rhinosinusitis
- Acute Sinus Infection
ICD-10 Codes:
- J0190: Acute sinusitis, unspecified
Also known as:
- Common Cold
- Upper Respiratory Infection
- Head Cold
- Cold Symptoms
ICD-10 Codes:
- J069: Acute upper respiratory infection, unspecified
Also known as:
- Cough
- Coughing
- Persistent cough
- Chronic cough
ICD-10 Codes:
- R059: Cough, unspecified
Also known as:
- Urinary Tract Infection
- UTI
- Bladder infection
- Kidney infection
- Urine infection
ICD-10 Codes:
- N390: Urinary tract infection, site not specified
Also known as:
- Sore Throat
- Acute pharyngitis
- Throat inflammation
- Acute throat infection
ICD-10 Codes:
- J029: Acute pharyngitis, unspecified
Also known as:
- Hypothyroidism
- Congenital hypothyroidism
- Hypothyroidism (Underactive Thyroid)
- Underactive Thyroid
- Low Thyroid Function
ICD-10 Codes:
- E039: Hypothyroidism, unspecified
Which procedures does Dr. Giesen perform as a Internist?
As a Internist, procedures performed by an Dr. William Giesen 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
For detailed information, please contact Dr. Giesen's office.
Does Dr. Giesen accept my insurance?
Dr. Giesen accepts most major insurance plans. Important: Please call our office at (203) 655-2516 before your appointment to verify that your specific plan and network are accepted.
What insurance plans does Dr. Giesen accept in Darien, CT?
Dr. Giesen in Darien, CT accepts plans from many carriers. While this list is updated regularly, it is not a guarantee of coverage.
Top Insurances
Cigna
Community Health Network
CVS Health (formerly Aetna)
Elevance Health Inc. (formerly Anthem)
Express Scripts
Medicare
Spectrum
State of Tennessee
TCF Financial Corporation
UnitedHealthcare
View All Insurances
Where is Dr. Giesen's office located?
What is Dr. Giesen's NPI number?An National Provider Identifier (NPI) is a unique ID number that identifies doctors and healthcare providers nationwide.
Dr. Giesen's National Provider Identifier (NPI) number is 1124104724.
What common questions do patients ask about Dr. Giesen?
Here are answers to patients Frequently Asked Questions (FAQ’s) about Dr. Giesen
What is Dr. William Giesen's specialty?
Dr. Giesen is a Internist near Darien, CT.
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.
Contact Dr. Giesen to book an appointment today.Is this Dr. William Giesen affiliated with a ranked Castle Connolly Top Hospital?
Yes, Dr. Giesen is affiliated with Stamford Hospital which is a Castle Connolly Top Hospital. Castle Connolly Top Hospitals are healthcare institutions recognized for their excellence in specific medical procedures and overall patient care. They are identified through a rigorous peer nomination process, evaluating factors like patient outcomes, quality of care, and expertise. The list recognizes hospitals that excel in 20 or more specific medical procedures, representing the top 25% nationwide. Castle Connolly Top Hospitals
Where can I learn more about Internist?
Explore Internist with insights from trusted medical experts on EverydayHealth.com, where you'll find the most relevant content and helpful condition guides for up-to date information about symptoms, causes, diagnosis, treatment and more. See all our health guides to find trusted information on medical conditions from our experts at Everyday Health.
Is William Giesen accepting new patients in Darien, CT?
Yes, Dr. William Giesen is accepting new patients at this time.
Does Dr. William Giesen offer online booking?
Please contact Dr. Giesen's office at (203) 655-2516 for information about online booking, telehealth, or to schedule an appointment.
How can I make an appointment with William Giesen?
Please contact Dr. Giesen's office at (203) 655-2516 for information regarding telehealth appointment availability or for scheduling assistance.
Which board certifications does Dr. William Giesen have?
Dr. William Giesen is certified by the American Board of Internal Medicine.
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