Summary

Dr. William Karnes treats colon polyps, GERD, and abdominal pain, and performs lower GI endoscopy, colonoscopy, and upper GI endoscopy. He practices gastroenterology and internal medicine and has 44 years of experience.

Dr. Karnes earned his medical degree from the University of Minnesota Medical School and is affiliated with UCI Medical Center, Doctors Medical Center of Modesto, Hoag Hospital Newport Beach, College Hospital Costa Mesa, and UCI Health Irvine. He sees patients in Orange, Irvine, Costa Mesa, and Modesto, California. Patients on Vitals rate Dr. Karnes 4.36 out of 5.

Overview based on verified provider data

Quick Facts

  • accepting new patients
  • 4.4
  • 44 years of experience
  • speaks English
  • University Of Minnesota Medical School
  • 8 written reviews
  • 2 specialties
  • 1 area of expertise
  • 5 hospital affiliations
  • 10 office locations
  • Male

Patients’ Perspective

  • Gave an accurate diagnosis
  • Had a good bedside manner
  • Spent time with me

Office Locations

Dr. William Ernest Karnes has 10 locations

Uci Health H H Chao Comprehensive Digestive Disease Center

101 The City Dr S Bldg 22COrange, CA 92868
Mon8:00 am - 5:00 pm
Tue8:00 am - 5:00 pm
Wed8:00 am - 5:00 pm
Thu8:00 am - 5:00 pm
Fri8:00 am - 5:00 pm
SatClosed
SunClosed

Dr. William Ernest Karnes

1 Medical Plaza Drive Gottschalk Medical PlazaIrvine, CA 92697

Dr. William Ernest Karnes

101 The City Dr S Bldg 22COrange, CA 92868
Mon8:00 am - 5:00 pm
Tue8:00 am - 5:00 pm
Wed8:00 am - 5:00 pm
Thu8:00 am - 5:00 pm
Fri8:00 am - 5:00 pm
SatClosed
SunClosed

Uci Medical Center

101 The City Dr SOrange, CA 92868

College Hospital Costa Mesa

301 Victoria StCosta Mesa, CA 92627

Dr. William Ernest Karnes

1 Medical Plaza DriveIrvine, CA 92697

Dr. William Ernest Karnes

1640 Newport Blvd Ste 350Costa Mesa, CA 92627
Mon8:00 am - 5:00 pm
Tue8:00 am - 5:00 pm
Wed8:00 am - 5:00 pm
Thu8:00 am - 5:00 pm
Fri8:00 am - 5:00 pm
SatClosed
SunClosed

Dr. William Ernest Karnes

1640 Newport Blvd Ste 100Costa Mesa, CA 92627

Uci Health Digestive Disease Center

1640 Newport Blvd Ste 350Costa Mesa, CA 92627
Mon8:00 am - 5:00 pm
Tue8:00 am - 5:00 pm
Wed8:00 am - 5:00 pm
Thu8:00 am - 5:00 pm
Fri8:00 am - 5:00 pm
SatClosed
SunClosed

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Dr. William Ernest Karnes JR., MDChimdi Mfebe, APRNJi Soo Choi, APRNJan Seiler, APRN
GastroenterologyGastroenterologyGastroenterologyGastroenterology
Accepts New Patients Accepts New Patients Accepts New Patients Accepts New Patients
4.4 
0 
0 
0 
44 Years of Experience
No Virtual Visit Option Virtual Visit Available Virtual Visit Available Virtual Visit Available
Speaks English Speaks English Speaks English Speaks English
Orange , CALittle Rock , ARSacramento , CAMontgomery , AL
Med School: University Of Minnesota Medical School Med School: Chamberlain University College of Nursing Med School: New York University Med School: Georgia State University
Current Profile
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Insurance Plans Accepted by Dr. William Ernest Karnes

  • Accepts Medicare
  • Accepts Medicaid

Medical Specialties

Dr. William Ernest Karnes has the following 2 specialties

Specialty Expertise

Dr. William Ernest Karnes has the following area of expertise

  • Internal Medicine

Certifications, License, & Education

44 Years Experience

Dr. William Ernest Karnes 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 2026.

Education & Training

Medical School

Graduated from University Of Minnesota Medical School in 1982.

NPI Number

Dr. Karnes' NPI number is 1881652998.

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Frequently Asked Questions

Which hospitals is Dr. William Karnes affiliated with?
Dr. William Karnes is affiliated with Uci Medical Center, Doctors Medical Center Of Modesto, Hoag Hospital Newport Beach, College Hospital Costa Mesa, and Uci Health Irvine.
Is Dr. William Karnes accepting new patients?
Dr. William Karnes is accepting new patients on Vitals. View Dr. William Karnes's profile on Vitals to make an appointment.
Where is Dr. William Karnes's office located?
Dr. William Karnes's office is located at 101 The City Dr S Bldg 22C, Orange, CA, 92868.
Does Dr. William Karnes accept virtual/telehealth appointments?
Dr. William Karnes has not indicated that they accept virtual/teleheatlh appointments. Contact their office through their Vitals profile to check for availability.
How can I make an appointment with Dr. William Karnes?
You can find contact information for Dr. William Karnes here on Vitals.

Data Sources

This provider profile is built using data from:

  • NPPES NPI Registry
  • State medical licensing boards
  • Healthcare system and provider network data

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