NOTICE: Office Closing May 15th 2020

Home / Doctors / General Surgery / H. Ray Rassai MD, FACS

H. Ray Rassai

MD, FACS

Cardiology & Internal Medicine
General Surgery
Antioch office
Sinus Center office
925-757-2160
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

2350 Country Hills Drive Suite A Antioch, CA 94509
2400 Balfour Road Suite 300
Brentwood, CA 94513

Affiliations

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

Sub-specialties

Surgical Critical Care, Advanced Laparoscopic

About

Dr. Rassai earned his Bachelor of Science in biochemistry with honors from the University of California, Davis. He then received his medical degree from the Medical College of Pennsylvania. Following his passion for surgery, he completed a general surgery residency at the University of California Davis/San Joaquin General Hospital. In 2000, he joined East Bay Surgical Associates, where he practiced general, minimally-invasive, endocrine, venous and trauma surgery. In 2007, he took a three-year sabbatical from private practice and returned to San Joaquin General Hospital as an associate professor and chairman of the Department of Surgery. In early 2010, Dr. Rassai concluded his sabbatical and returned to private practice with East Bay Surgical Associates, which merged with BASS Medical Group in 2010. Dr. Rassai continues to practice general surgery with a special interest in minimally-invasive hernia procedures, gallbladder issues, thyroid and parathyroid disease, and colon cancer. He also treats varicose veins. Dr. Rassai currently works in Antioch and Concord.

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: Medical College of Pennsylvania in Philadelphia
Internship: San Joaquin General Hospital in Stockton, California
Residency: San Joaquin General Hospital in Stockton, California and University of California Davis

Media

For more information about BPH/enlarged prostate and the Urolift procedure, click the banner below:

Main Office

2350 Country Hills Drive Suite A Antioch, CA 94509

Affiliations

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

Sub-specialties

Surgical Critical Care, Advanced Laparoscopic

Patient Forms

HIPAANew Patient - General SurgeryNew Patient PacketNew Patient RegistrationBASS Financial Policy

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