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Dr. John Lah, MD

Dr. John Lah, MD

Fallbrook, CA

Accepting patients
Telehealth

    Who is Dr. Lah, Gastroenterologist in Fallbrook, CA?

    Dr. John Lah, MD is a Gastroenterologist, who primarily practices in Fallbrook, CA with 2 additional practice locations. He is board certified by the American Board of Internal Medicine. Dr. Lah graduated from New York Medical College and completed his residency at University of California Medical Center. Dr. Lah is fluent in English and Spanish, and is currently seeing new patients. Dr. Lah’s practice accepts Kaiser Permanente, Medicaid, Medicare, UnitedHealthcare and other major insurance plans. To book an appointment or to confirm insurance options, please call Dr. Lah’s office.

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

    • Fellowship: University of California Medical Center

    • Residency: University of California Medical Center

    • Medical School: New York Medical College

    Is Dr. Lah board certified in Gastroenterologist?

    Yes, Dr. John Lah, MD is board certified by the American Board of Internal Medicine

    What languages does Dr. Lah speak?

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

    • English

    • Spanish

    What conditions does Dr. Lah treat?

    As a Gastroenterologist, Dr. Lah 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. Lah. 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:

    • Colon Cancer Screening
    • Health Screening
    • Colorectal Cancer Screening (PDQ®)
    • Screening Tests to Detect Colorectal Cancer and Polyps
    • Tests to Detect Colorectal Cancer and Polyps
    • Colorectal Cancer Screening
    • Colonoscopy Screening
    • Bowel Cancer Screening

    ICD-10 Codes:

    • Z1211: Encounter for screening for malignant neoplasm of colon

    Also known as:

    • Colon Polyps
    • Non-Infectious Gastroenteritis and Colitis
    • Colonic Polyps
    • Digestive Disease
    • Colorectal Polyps
    • Intestinal Polyps
    • Bowel Polyps
    • Inflammation of Stomach and Intestines
    • Non-Bacterial Colitis
    • Gut Inflammation

    ICD-10 Codes:

    • Z86010: Personal history of colon polyps
    • Z860100: Personal history of colon polyps, unspecified
    • K529: Noninfective gastroenteritis and colitis, unspecified

    Also known as:

    • Family History of Digestive Organ Cancer
    • Cancer
    • Family History
    • Genetic risk for gastrointestinal cancer
    • Family history of GI cancer
    • Hereditary digestive cancer

    ICD-10 Codes:

    • Z800: Family history of malignant neoplasm of digestive organs

    Also known as:

    • Acid Reflux
    • GERD
    • Acid Reflux (GER & GERD) in Adults
    • Acid Reflux (GER & GERD) in Children
    • Acid Reflux (GER & GERD) in Infants
    • Gastroesophageal Reflux
    • Heartburn
    • Indigestion

    ICD-10 Codes:

    • K219: Gastro-esophageal reflux disease without esophagitis

    Also known as:

    • History of Adenomatous and Serrated Colon Polyps
    • Colon Polyps
    • Colonic Polyps
    • Past Colon Polyps
    • Previous Adenomas
    • History of Precancerous Colon Growths
    • Colorectal polyps
    • Bowel polyps
    • Intestinal polyps

    ICD-10 Codes:

    • Z860101: Personal history of adenomatous and serrated colon polyps
    • K635: Polyp of colon

    Also known as:

    • Change in Bowel Habits
    • Abnormal Bowel Movements
    • Bowel Movement
    • Altered Bowel Habits
    • Irregular Bowel Movements
    • Changes in Pooping
    • Unusual stool
    • Changes in poop
    • Fecal changes

    ICD-10 Codes:

    • R194: Change in bowel habit
    • R195: Other fecal abnormalities

    Also known as:

    • Widespread Abdominal Pain
    • Upper Middle Abdominal Pain
    • Abdominal Pain
    • General stomach pain
    • Overall belly pain
    • Diffuse abdominal pain
    • Epigastric pain
    • Pain below breastbone
    • Upper stomach pain
    • Stomach Ache
    • Belly Pain
    • Stomach Pain

    ICD-10 Codes:

    • R1084: Generalized abdominal pain
    • R1013: Epigastric pain
    • R109: Unspecified abdominal pain

    Also known as:

    • Stomach Inflammation
    • Stomach Disorder
    • Gastritis & Gastropathy
    • Gastritis
    • Inflamed stomach lining
    • Stomach lining inflammation

    ICD-10 Codes:

    • K2970: Gastritis, unspecified, without bleeding

    Also known as:

    • Rectal Bleeding
    • Gastrointestinal Bleeding
    • Gastrointestinal (GI) Bleeding
    • Anal Bleeding
    • Blood in Stool
    • Lower GI Bleed

    ICD-10 Codes:

    • K625: Hemorrhage of anus and rectum

    Also known as:

    • Abdominal Bloating
    • Gas
    • Gas in the Digestive Tract
    • Bloated Stomach
    • Swollen Belly
    • Gaseous Distension

    ICD-10 Codes:

    • R140: Abdominal distension (gaseous)

    Also known as:

    • Hemorrhoids
    • Piles
    • Anal veins
    • Swollen rectal veins

    ICD-10 Codes:

    • K648: Other hemorrhoids

    Also known as:

    • Large Intestine Diverticulosis
    • Diverticulosis and Diverticulitis
    • Diverticular Disease
    • Colon Diverticula
    • Pockets in the Colon

    ICD-10 Codes:

    • K5730: Diverticulosis of large intestine without perforation or abscess without bleeding

    Also known as:

    • Throat and Esophagus Swallowing Difficulty
    • Swallowing Disorder
    • Pharyngoesophageal dysphagia
    • Trouble swallowing in throat
    • Esophageal swallowing problems

    ICD-10 Codes:

    • R1314: Dysphagia, pharyngoesophageal phase

    Also known as:

    • Iron Deficiency Anemia
    • Anemia
    • Iron
    • Anemia from Iron Lack
    • Low Iron Anemia
    • Sideropenic Anemia

    ICD-10 Codes:

    • D509: Iron deficiency anemia, unspecified

    Does Dr. Lah accept my insurance?

    Dr. Lah accepts most major insurance plans. Important: Please call our office at before your appointment to verify that your specific plan and network are accepted.

    What insurance plans does Dr. Lah accept in Fallbrook, CA?

    Dr. Lah in Fallbrook, CA accepts plans from many carriers. While this list is updated regularly, it is not a guarantee of coverage.

    Top Insurances

    • All Other Third Party

    • Blue Shield of California

    • Centene

    • CVS Health (formerly Aetna)

    • Express Scripts

    • Kaiser Permanente

    • Medicare

    • Monarch HealthCare

    • Other Health Care Provider

    • UnitedHealthcare

    View All Insurances

    Where is Dr. Lah's office located?

    Dr. John Lah also offers virtual visits

    Dr. John Lah's Primary Practice

    521 E Elder St Ste 104

    Fallbrook, CA 92028

    Get Directions

    Suite 201and401

    12675 La Mirada Blvd

    La Mirada, CA 90638

    Get Directions

    Dr. John Lah's Practice 3

    12462 Putnam St

    Whittier, CA 90602

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

    Dr. Lah's National Provider Identifier (NPI) number is 1437221272.

    What common questions do patients ask about Dr. Lah?

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

    What is Dr. John Lah's specialty?

    Dr. Lah is a Gastroenterologist near Fallbrook, CA. An internist focused on diagnosing and treating disorders of the digestive system, encompassing the stomach, intestines, liver, and gallbladder. This specialist manages conditions like abdominal pain, ulcers, diarrhea, cancer, and jaundice, and performs intricate diagnostic and therapeutic procedures using endoscopes to examine internal organs. Contact Dr. Lah to book an appointment today.

    Is this Dr. John Lah affiliated with a ranked Castle Connolly Top Hospital?

    No, Lah is not affiliated with a Castle Connolly Top Hospital. Castle Connolly Top Hospitals 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 Gastroenterologist?

    Explore Gastroenterologist 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 John Lah accepting new patients in Fallbrook, CA?

    Yes, Dr. John Lah is accepting new patients at this time.

    Does Dr. John Lah offer online booking?

    Please contact Dr. Lah's office for information about online booking, telehealth, or to schedule an appointment.

    How can I make an appointment with John Lah?

    Please contact Dr. Lah's office for information regarding telehealth appointment availability or for scheduling assistance.

    Which board certifications does Dr. John Lah have?

    Dr. John Lah is certified by the American Board of Internal Medicine.

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