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Home / Doctors / Otolaryngology (ENT) / Benjamin M. Loos MD

Benjamin M. Loos

MD

Cardiology & Internal Medicine
Otolaryngology (ENT)
Antioch office
Sinus Center office
925-685-0917
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

2700 Grant Street Suite 104 Concord, CA 94520
2400 Balfour Road Suite 300
Brentwood, CA 94513

Affiliations

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

Sub-specialties

About

Dr. Loos specializes in head and neck surgery as well as facial plastic surgery. He works out of several BASS Medical Group offices in Contra Costa County. Dr. Loos received his medical education from Baylor College of Medicine in Houston, Texas. He completed a general surgery internship and head and neck surgery training at Georgetown University Medical Center in Washington, DC. Dr. Loos completed additional training in facial plastic and reconstructive surgery at the University of California, San Francisco. He is board certified by the American Board of Facial Plastic and Reconstructive Surgery as well as the American Board of Otolaryngology – Head and Neck Surgery. Dr. Loos’ research has appeared in medical textbooks and national scientific journals on both facial plastic surgery and head and neck surgery. Dr. Loos’ credentials include specialized experience in all aspects of head and neck surgery with additional attention to facial plastic surgery. In evaluating and treating all ages of patients, Dr. Loos focuses on delivering individualized care. While he enjoys traveling, exercise, and playing guitar, Dr. Loos most enjoys spending time with his wife, twin boys, and dog.

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:Baylor College of Medicine in Houston, Texas
Internship:Georgetown University Medical Center in Washington DC
Residency:Georgetown University Medical Center in Washington DC
Fellowship: Armed Forces Institute of Pathology in Washington DC

Media

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Main Office

2700 Grant Street Suite 104 Concord, CA 94520

Affiliations

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

Sub-specialties

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