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Home / Doctors / Gastroenterology / V. Arek Keledjian MD

V. Arek Keledjian

MD

Cardiology & Internal Medicine
Gastroenterology
Antioch office
Sinus Center office
925-754-0765
Walnut Creek office
Internal Medicine office
Texting appointment line: 925-395-4023
Currently Not Accepting New Patients
Currently Not Accepting New Patients
Currently Not Accepting New Patients
Currently Not Accepting New Patients

Main Office

3903 Lone Tree Way Suite 205 Antioch, CA 94509
2400 Balfour Road Suite 300
Brentwood, CA 94513

Affiliations

John Muir Health Concord Medical Center
John Muir Health Walnut Creek Medical Center

Sub-specialties

About

Dr. V. Arek Keledjian received his Bachelor of Science in biology from Oakland University in Rochester, Michigan. He then received his medical degree from State Medical Institute of Yerevan in Armenia. Dr. Keledjian then completed his residency in internal medicine at Cook County Hospital in Chicago, Illinois. At Cook County, Dr. Keledjian was chief medical resident. He also completed a fellowship in gastroenterology at Cook County Hospital. Dr. Keledjian began practicing with the Gastroenterology Group of Contra Costa in 1990. The group became affiliated with BASS in early 2015. His area of interest is diseases of the biliary system and liver. Dr. Keledjian is the Chair of the Department of Gastroenterology for the John Muir Medical Center’s Concord campus and is an active member of the American Gastroenterological Association, the American Society of Gastrointestinal Endoscopy, the California Medical Association, the Alameda-Contra Costa Medical Association, and the Northern California Society of Clinical Gastroenterology. He is also an expert medical reviewer for the Medical Board of California. Dr. Keledjian is board certified in internal medicine and gastroenterology.

Dr. Audrey "Lisa" Arzamendi is double board-certified in internal medicine and endocrinology. Since 2012, she has specialized in diabetes, obesity and metabolism, thyroid disease (including Hashimoto's and Graves'), polycystic ovary syndrome (PCOS) and sex hormone disorders, adrenal and pituitary dysfunction, osteoporosis, parathyroid/calcium disorders, and thyroid and parathyroid nodules and cancers. She is highly trained in ultrasound-guided fine-needle aspiration (FNA) biopsy of the thyroid (99% diagnostic rate).

Dr. Arzamendi is committed to safe and established medical treatments, and prides herself on staying informed about emerging therapies and research-supported non-prescription options. She is experienced working with all forms of brand-name and generic thyroid medications, and as a type 1 diabetic herself, has first-hand knowledge of nearly all available prescription and technological diabetic treatments, to best support patients in selecting their optimal diabetes treatment regimens.

Dr. Arzamendi graduated with honors from Stanford University, with a BA in Human Biology and a concentration in Health & Human Performance.  She attended UC San Diego School of Medicine (receiving a federal NIH National Cancer Institute fellowship), and completed her internal medicine residency at Kaiser Pemanente’s Santa Clara Medical Center.  Her endocrinology training was completed at UC Davis Medical Center. She previously practiced in California's South Bay before relocating to open her practice in Walnut Creek in 2020. Dr. Arzamendi was a Stanford varsity athlete and still enjoys running, hiking, tennis, rowing, and other outdoor activities. She loves spending time with her husband and many pets, and looks forward to being your doctor!

Conditions Treated

  • Alternative and second opinions in surgical and non surgical conditions
  • Anal Abscess/Fistula
  • Anal Cancer
  • Anal Fissure
  • Anal Incontinence
  • Anal Warts
  • Anorectal Bleeding
  • Colonoscopy
  • Colon Cancer
  • Colorectal Cancer
  • Colorectal Cancer Screening
  • Colorectal Cancer Surgery
  • Constipation
  • Crohn's Disease
  • Diverticular Disease
  • Hemorrhoids
  • Inflammatory Bowel Disease
  • Ostomy
  • Pilonidal Disease
  • Polyps of the Colon & Rectum 
  • Pruritis - ani / anal itching 
  • Rectal Prolapse
  • Rectocele
  • Rectal Cancer
  • Ulcerative Colitis

Conditions Treated

  • Alternative and second opinions in surgical and non surgical conditions
  • Anal Abscess/Fistula
  • Anal Cancer
  • Anal Fissure
  • Anal Incontinence
  • Anal Warts
  • Anorectal Bleeding
  • Colonoscopy
  • Colon Cancer
  • Colorectal Cancer
  • Colorectal Cancer Screening
  • Colorectal Cancer Surgery
  • Constipation
  • Crohn's Disease
  • Diverticular Disease
  • Hemorrhoids
  • Inflammatory Bowel Disease
  • Ostomy
  • Pilonidal Disease
  • Polyps of the Colon & Rectum 
  • Pruritis - ani / anal itching 
  • Rectal Prolapse
  • Rectocele
  • Rectal Cancer
  • Ulcerative Colitis

Conditions Treated

  • Alternative and second opinions in surgical and non surgical conditions
  • Anal Abscess/Fistula
  • Anal Cancer
  • Anal Fissure
  • Anal Incontinence
  • Anal Warts
  • Anorectal Bleeding
  • Colonoscopy
  • Colon Cancer
  • Colorectal Cancer
  • Colorectal Cancer Screening
  • Colorectal Cancer Surgery
  • Constipation
  • Crohn's Disease
  • Diverticular Disease
  • Hemorrhoids
  • Inflammatory Bowel Disease
  • Ostomy
  • Pilonidal Disease
  • Polyps of the Colon & Rectum 
  • Pruritis - ani / anal itching 
  • Rectal Prolapse
  • Rectocele
  • Rectal Cancer
  • Ulcerative Colitis

Education

Medical School: State Medical Institute of Yerevan in Armenia
Residency: Cook County Hospital in Chicago, Illinois
Fellowship: Cook County Hospital in Chicago, Illinois

Media

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Main Office

3903 Lone Tree Way Suite 205 Antioch, CA 94509

Affiliations

John Muir Health Concord Medical Center
John Muir Health Walnut Creek Medical Center

Sub-specialties

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