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Dr. Caroline Messer, MD

Dr. Caroline Messer, MD

Endocrinologist, Internist

Mount Kisco, NY

Accepting patients

Affiliated with a Castle Connolly Top Hospital

    Who is Dr. Messer, Endocrinologist in Mount Kisco, NY?

    Dr. Caroline Messer, MD is an Endocrinologist, who primarily practices in Mount Kisco, NY with 1 additional practice location. She is board certified. Dr. Messer graduated from Mount Sinai School of Medicine and completed her residency at Mount Sinai Hospital. She is a member of the North Shore-LIJ Medical Group, AACE, and Endocrine Society. Dr. Messer is fluent in English, French, and Portuguese, and is currently seeing new patients. Dr. Messer’s practice accepts Medicare and other major insurance plans. To book an appointment or to confirm insurance options, please call Dr. Messer’s office at (914) 241-1050.
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    Castle Connolly Top Doctor

    Castle Connolly Top Doctors are doctor-nominated and selected by a physician-led research team.

    What are Areas of Expertise for Dr. Messer?

    Dr. Caroline Messer, MD is a highly-rated, board-certified Endocrinologist 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. Messer empowers patients to confidently navigate their health journey, specializing in Obesity, and comprehensive wellness support. Serving the Mount Kisco, NY community, Dr. Messer is dedicated to enhancing lives through expert, patient-centered care.

    Where did Dr. Messer go to medical school and complete their residency?

    • Fellowship: Mount Sinai Hospital

    • Residency: Mount Sinai Hospital

    • Medical School: Mount Sinai School of Medicine

    Is Dr. Messer board certified as an Endocrinologist?

    Yes, Dr. Caroline Messer, MD is board certified by the American Board of Internal Medicine , American Board of Internal Medicine since 2010

    What languages does Dr. Messer speak?

    Dr. Messer and their clinical team can communicate with patients in the following languages:

    • English
    • French
    • Portuguese

    What conditions does an Endocrinologist like Dr. Messer typically treat?

    As an Endocrinologist, Dr. Messer 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. Messer. 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:

    • Hypothyroidism
    • Congenital hypothyroidism
    • Hypothyroidism (Underactive Thyroid)
    • Underactive Thyroid
    • Low Thyroid Function

    ICD-10 Codes:

    • E039: Hypothyroidism, unspecified

    Also known as:

    • Age-Related Osteoporosis
    • Fractures
    • Osteoporosis
    • Senile Osteoporosis
    • Primary Osteoporosis
    • Bone Thinning from Aging

    ICD-10 Codes:

    • M810: Age-related osteoporosis without current pathological fracture

    Also known as:

    • Unexplained Weight Gain
    • Sudden weight gain
    • Rapid weight increase
    • Abnormal increase in weight

    ICD-10 Codes:

    • R635: Abnormal weight gain

    Also known as:

    • Hashimoto's Disease
    • Thyroid Disease
    • Hashimoto's disease
    • Autoimmune thyroiditis
    • Chronic lymphocytic thyroiditis
    • Hashimoto's thyroiditis

    ICD-10 Codes:

    • E063: Autoimmune thyroiditis

    Also known as:

    • Polycystic Ovary Syndrome (PCOS)
    • Polycystic Ovary Syndrome
    • PCOS
    • Stein-Leventhal Syndrome
    • Polycystic Ovaries

    ICD-10 Codes:

    • E282: Polycystic ovarian syndrome

    What procedures does an Endocrinologist like Dr. Messer typically perform?

    As an Endocrinologist, Dr. Messer performs a variety of medical procedures. This procedure information is derived from anonymized insurance claims and highlights the medical procedures most commonly performed by Dr. Messer. 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:

    • Ultrasound-Guided Fine Needle Biopsy
    • Biopsy
    • Ultrasound
    • FNA Biopsy with Ultrasound
    • Image-Guided Biopsy
    • Fine Needle Aspiration
    • First Lesion Biopsy

    CPT Codes:

    • 10005: Fine needle aspiration biopsy, including ultrasound guidance; first lesion

    Does Dr. Messer accept my insurance?

    Dr. Messer accepts most major insurance plans. Important: Please call our office at (914) 241-1050 before your appointment to verify that your specific plan and network are accepted.

    What insurance plans does Dr. Messer accept in Mount Kisco, NY?

    Dr. Messer in Mount Kisco, NY accepts plans from many carriers. While this list is updated regularly, it is not a guarantee of coverage.

    Top Insurances

    • Cigna Group

    • Corporate Services

    • CVS Health (formerly Aetna)

    • Elevance Health Inc. (formerly Anthem)

    • EmblemHealth

    • Healthfirst New York

    • Medicare

    • Other Health Care Provider

    • Spectrum

    • UnitedHealth Group

    View All Insurances

    Where is Dr. Messer's office located?

    Dr. Caroline Messer's Primary Practice

    90 S Bedford Rd

    Mount Kisco, NY 10549

    (914) 241-1050

    Get Directions

    Dr. Caroline Messer's Practice 2

    185 Route 312

    Brewster, NY 10509

    Get Directions

    Recognitions

    Memberships & Associations

    • Member of North Shore-LIJ Medical Group

    • Member of AACE

    • Member of Endocrine Society

    Castle Connolly Doctor’s Choice Awards

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    Doctor’s Choice - All Time

    Among the most nominated for the Castle Connolly Top Doctor recognition across all time

    nomination-award-icon

    Doctor’s Choice - 2025

    Among the most nominated for the Castle Connolly Top Doctor recognition in 2025

    nomination-award-icon

    Doctor’s Choice - Last 5 Years

    Among the most nominated for the Castle Connolly Top Doctor recognition in the last 5 years

    What is Dr. Messer's NPI number?A National Provider Identifier (NPI) is a unique ID number that identifies doctors and healthcare providers nationwide.

    Dr. Messer's National Provider Identifier (NPI) number is 1386855047.

    What common questions do patients ask about Dr. Messer?

    Here are answers to patients Frequently Asked Questions (FAQ’s) about Dr. Messer

    What is Dr. Caroline Messer's specialty?

    Dr. Messer is an Endocrinologist near Mount Kisco, NY.

    What does an Endocrinologist do?

    An internist specializing in disorders of the endocrine glands, including the thyroid and adrenal glands. This specialist also manages a range of conditions such as diabetes, metabolic and nutritional disorders, obesity, pituitary disorders, and menstrual and sexual health issues.

    Is Dr. Caroline Messer affiliated with a ranked Castle Connolly Top Hospital?

    Yes, Dr. Messer is affiliated with Lenox Hill Hospital, The Mount Sinai Hospital which are a Castle Connolly Top Hospitals. 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

    When to see an Endocrinologist?: Guides for symptoms, conditions, and treatments

    Understand your symptoms and know when it’s time to see an Endocrinologist. Explore 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 Dr. Caroline Messer accepting new patients in Mount Kisco, NY?

    Yes, Dr. Caroline Messer is accepting new patients at this time.

    Does Dr. Caroline Messer offer online booking?

    Please contact Dr. Messer's office at (914) 241-1050 for information about online booking, telehealth, or to schedule an appointment.

    How can I make an appointment with Dr. Caroline Messer?

    Please contact Dr. Messer's office at (914) 241-1050 to schedule an appointment.

    Where is Dr. Messer's office located?

    Dr. Messer's offices are located in Mount Kisco, NY and Brewster, NY.

    Which board certifications does Dr. Caroline Messer have?

    Dr. Caroline Messer is certified by the American Board of Internal Medicine.