Summary

Dr. Lukejohn Day is a gastroenterologist and internal medicine physician who graduated from Stanford University School of Medicine. With 22 years of clinical experience, he provides comprehensive digestive health care and general internal medicine services. Dr. Day speaks English and brings more than two decades of expertise to his practice.

Dr. Day is affiliated with Zuckerberg San Francisco General Hospital and Trauma Center and UCSF Helen Diller Medical Center at Parnassus Heights, practicing in San Francisco, California. He specializes in treating conditions such as proctitis, anal dysplasia, and anal pain. His procedural expertise includes colonoscopy and lower GI endoscopy with sedation services. Patients have given him an average rating of 5.0 on Vitals.

Overview based on verified provider data

Quick Facts

  • 5
  • 22 years of experience
  • speaks English
  • Stanford University School Of Medicine
  • 2 specialties
  • 11 areas of expertise
  • 2 hospital affiliations
  • 1 office location
  • Male

Office Location

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Dr. Lukejohn Welch Day, MDRebecca Humphries, APRNRachel Oliver, APRNSuk Whang, MD
GastroenterologyGastroenterologyGastroenterologyGastroenterology
Accepts New Patients Accepts New Patients Accepts New Patients
22 Years of Experience 24 Years of Experience
No Virtual Visit Option Virtual Visit Available Virtual Visit Available No Virtual Visit Option
Speaks English Speaks English Speaks English
San Francisco , CASacramento , CASacramento , CAVacaville , CA
Med School: Stanford University School Of Medicine Med School: Emory University Med School: University of South Alabama Med School: Uniformed Services Univ Of The Health Sciences F E Hebert Schl Of Medicine
Current Profile
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Insurance Plans Accepted by Dr. Lukejohn Welch Day

Be sure to verify insurance information directly with your doctor's office, as it may undergo frequent changes.

Medical Specialties

Dr. Lukejohn Welch Day has the following 2 specialties

Specialty Expertise

Dr. Lukejohn Welch Day has the following 11 areas of expertise

  • Abdominal Pain
  • Acid Reflux Disease (Gastroesophageal Reflux / GERD)
  • Acid Reflux Disease (GERD)
  • Celiac Disease
  • Colonoscopy
  • Constipation
  • Hemorrhoids
  • Hepatitis C
  • Internal Medicine
  • Irritable Bowel Syndrome (IBS)
  • Ulcerative Colitis

Certifications, License, & Education

22 Years Experience

Dr. Lukejohn Welch Day holds an expired medical license in the state of California.

Medical License

Medical Doctor with an expired medical license in the state of California that expired in 2025.

Education & Training

Medical School

Graduated from Stanford University School Of Medicine in 2004.

NPI Number

Dr. Day's NPI number is 1669623773.

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Frequently Asked Questions

Does Dr. Lukejohn Day accept my insurance?
You can see the insurance plans that Dr. Lukejohn Day accepts on their Vitals profile.
Where is Dr. Lukejohn Day's office located?
Dr. Lukejohn Day's office is located at 1001 Potrero Ave, San Francisco, CA, 94110.
How can I make an appointment with Dr. Lukejohn Day?
You can find contact information for Dr. Lukejohn Day here on Vitals.
Does Dr. Lukejohn Day accept virtual/telehealth appointments?
Dr. Lukejohn Day has not indicated that they accept virtual/teleheatlh appointments. Contact their office through their Vitals profile to check for availability.
Which hospitals is Dr. Lukejohn Day affiliated with?
Dr. Lukejohn Day is affiliated with Zuckerberg San Francisco General Hospital And Trauma Center and Ucsf Helen Diller Medical Center At Parnassus Heights.

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