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Dr. Thomas Wallach, MD

New York, NY

Accepting patients

Affiliated with a Castle Connolly Top Hospital

    Who is Dr. Wallach, Pediatric Gastroenterologist in New York, NY?

    Dr. Thomas Wallach, MD is a Pediatric Gastroenterologist, who primarily practices in New York, NY with 2 additional practice locations. Dr. Wallach is fluent in English, and is currently seeing new patients. To book an appointment or to confirm insurance options, please call Dr. Wallach’s office at (202) 305-5437.

    What languages does Dr. Wallach speak?

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

    • English

    What conditions does a Pediatric Gastroenterologist like Dr. Wallach typically treat?

    As a Pediatric Gastroenterologist, Dr. Wallach 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. Wallach. 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 here.

    Also known as:

    • Constipation
    • Difficulty Passing Stool
    • Infrequent Bowel Movements
    • Hard Stools

    ICD-10 Codes:

    • K5900: Constipation, unspecified

    Also known as:

    • Crohn's Disease
    • Crohn’s Disease
    • Regional Enteritis
    • Inflammatory Bowel Disease (IBD)
    • Terminal Ileitis

    ICD-10 Codes:

    • K5090: Crohn's disease, unspecified, without complications

    Also known as:

    • Failure to Thrive in Children
    • Growth Disorder
    • Poor growth in children
    • Childhood growth problems
    • Infant growth failure

    ICD-10 Codes:

    • R6251: Failure to thrive (child)

    Also known as:

    • Abdominal Pain
    • Stomach Ache
    • Belly Pain
    • Stomach Pain

    ICD-10 Codes:

    • R109: Unspecified abdominal pain

    Also known as:

    • Ulcerative Colitis
    • Colitis
    • Inflammatory Bowel Disease (IBD)
    • Chronic Colitis

    ICD-10 Codes:

    • K5190: Ulcerative colitis, unspecified, without complications

    Also known as:

    • Underweight
    • Body Weight
    • Low body weight
    • Below healthy weight
    • Malnutrition

    ICD-10 Codes:

    • R636: Underweight

    Also known as:

    • Unexplained Weight Loss
    • Involuntary Weight Loss
    • Significant Weight Loss
    • Unintentional Weight Loss

    ICD-10 Codes:

    • R634: Abnormal weight loss

    What procedures does a Pediatric Gastroenterologist like Dr. Wallach typically perform?

    As a Pediatric Gastroenterologist, Dr. Wallach 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. Wallach. 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 here.

    Also known as:

    • Diagnostic Upper Endoscopy with Biopsy
    • EGD with Biopsy
    • Esophagogastroduodenoscopy
    • Upper GI Endoscopy
    • Stomach Scope with Sample

    CPT Codes:

    • 43235: Esophagogastroduodenoscopy, flexible, transoral; diagnostic, including collection of specimen(s) by brushing or washing, when performed (separate procedure)

    Also known as:

    • Colonoscopy with Biopsy
    • Colonoscopy
    • Colorectal Cancer Screening Tests
    • Flexible Colonoscopy
    • Colon Biopsy
    • Large Intestine Scope
    • Colorectal Cancer Screening

    CPT Codes:

    • 45380: Colonoscopy, flexible; with biopsy, single or multiple

    Also known as:

    • Upper Endoscopy with Biopsy
    • Biopsy
    • Endoscopy
    • EGD with Biopsy
    • Gastroscopy with Biopsy
    • Esophagogastroduodenoscopy with Biopsy

    CPT Codes:

    • 43239: Esophagogastroduodenoscopy, flexible, transoral; with biopsy, single or multiple

    Does Dr. Wallach accept my insurance?

    Dr. Wallach accepts most major insurance plans. Important: Please call our office at (202) 305-5437 before your appointment to verify that your specific plan and network are accepted.

    What insurance plans does Dr. Wallach accept in New York, NY?

    Dr. Wallach in New York, NY accepts plans from many carriers. While this list is updated regularly, it is not a guarantee of coverage.

    Top Insurances

    • Centene Corporation

    • CVS Health (formerly Aetna)

    • Elevance Health Inc. (formerly Anthem)

    • EmblemHealth

    • Healthfirst New York

    • Molina Healthcare

    • National Benefit Fund

    • New York City Health and Hospitals Corporation

    • Service Employees International Union (SEIU)

    • UnitedHealth Group

    View All Insurances

    Where is Dr. Wallach's office located?

    Dr. Thomas Wallach's Primary Practice

    3959 Broadway

    New York, NY 10032

    (202) 305-5437

    Get Directions

    Dr. Thomas Wallach's Practice 2

    185 Montague St Fl 6

    Brooklyn Heights, NY 11201

    Get Directions

    Dr. Thomas Wallach's Practice 3

    450 Clarkson Ave

    Brooklyn, NY 11203

    Get Directions

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

    Dr. Wallach's National Provider Identifier (NPI) number is 1801162870.

    What common questions do patients ask about Dr. Wallach?

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

    What is Dr. Thomas Wallach's specialty?

    Dr. Wallach is a Pediatric Gastroenterologist near New York, NY.

    What does a Pediatric Gastroenterologist do?

    A pediatrician specializing in diagnosing and treating digestive system diseases in infants, children, and adolescents. This expert manages conditions like abdominal pain, ulcers, diarrhea, cancer, and jaundice and is skilled in performing complex diagnostic and therapeutic procedures using endoscopic techniques to visualize internal organs.

    Is this Dr. Thomas Wallach affiliated with a ranked Castle Connolly Top Hospital?

    Yes, Dr. Wallach is affiliated with Suny Downstate Medical Center (university Hospital Of Brooklyn) 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

    When to see a Pediatric Gastroenterologist?: Guides for symptoms, conditions, and treatments

    Understand your symptoms and know when it’s time to see a Pediatric Gastroenterologist. 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 Thomas Wallach accepting new patients in New York, NY?

    Yes, Dr. Thomas Wallach is accepting new patients at this time.

    Does Dr. Thomas Wallach offer online booking?

    Please contact Dr. Wallach's office at (202) 305-5437 for information about online booking, telehealth, or to schedule an appointment.

    How can I make an appointment with Thomas Wallach?

    Please contact Dr. Wallach's office at (202) 305-5437 for information regarding telehealth appointment availability or for scheduling assistance.

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