Andrew J. Day, MD
Accepting New Patients

Andrew J. Day, MD

  • Endocrinology
Average rating: 5.0
 
Santa Clarita Primary & Specialty Care |

About

Dr. Andrew Day is an endocrinologist who practices at UCLA Health's Santa Clarita clinic.

Dr. Day received his medical degree from the Temple University School of Medicine. He completed his internship and residency in internal medicine at the University of Wisconsin, Madison. He moved to the University of California, Los Angeles to complete a fellowship in endocrinology, diabetes, and metabolism. He received his undergraduate degree from the University of Chicago, where he graduated with honors.

Prior to pursuing a career in medicine, Dr. Day participated in research that studied the associations between sleep and metabolic health. Dr. Day has an interest in medical education and is involved with the David Geffen School of Medicine at UCLA.

Dr. Day was born and raised in Wisconsin. Outside of medicine, his interests include travel, reading, baseball, camping, hiking, kayaking, and enjoying the arts.

Patient Stories

Great UCLA Doctor

Languages

English

Education

Medical Board Certifications

Endocrinology, Diabetes and Metabolism, American Board of Internal Medicine, 2018
Internal Medicine, American Board of Internal Medicine, 2016

Fellowship

Endocrinology Diabetes & Metabolism, UCLA School of Medicine, 2018

Residency

Internal Medicine, University of Wisconsin Hospitals and Clinics, 2016

Degree

MD, Temple University School of Medicine, 2013

Recognitions

  • Super Doctors® Southern California Rising Stars 2021-2025

Hospital Affiliations

Ronald Reagan UCLA Medical Center

Medical Services

Research

Publications

  1. Day A, Yeh M, Livhits M. Surgery for Hyperthyroidism Lowers Cardiovascular Mortality Compared with Radioactive Iodine. Clinical Thyroidology. Jan 2018; 30: 15-17.
  2. Grock S, Day A, Bhat S. Two cases of impaired sensitivity to thyroid hormone with wild-type THRβ gene. Clinical Thyroidology. Aug 2017; 29: 318-321.
  3. Broussard J, Kilkus J, Delebecque F, Abraham V, Day A, Whitmore H, Tasali E. Elevated ghrelin predicts food intake during experimental sleep restriction. Obesity. Jan 2016; 24(1):132-8.
  4. Broussard J, Chapotot F, Abraham V, Day A, Delebecque F, Whitmore H, Tasali E. Sleep restriction increases free fatty acids in healthy men. Diabetologia. Apr 2015; 58(4):791-8.
  5. Pamidi S, Wroblewski K, Broussard J, Day A, Hanlon E, Abraham V, Tasali E. Obstructive sleep apnea in young lean men: impact on insulin sensitivity and secretion. Diabetes Care. Nov 2012; 35(11):2384-9.

Insurance

  • Aetna
  • Anthem Blue Cross
  • Blue Shield of California
  • Centivo
  • Cigna
  • First Health
  • Health Net of California
  • Interplan (part of HealthSmart)
  • Medicare Advantage
  • MultiPlan
  • UFCM Health System
  • Prime Health Services
  • Private Healthcare Systems (PHCS)
  • TRICARE
  • UnitedHealthcare

The list of health care plans above may not be comprehensive and could change. 
Please contact your benefits coordinator or health insurance company directly to verify coverage.

Visit our health insurance information page for more details.

Recognitions

  • Super Doctors® Southern California Rising Stars 2021-2025

Reviews

Overall Rating:
5.0
289 total ratings | 47 reviews
5.0
May 29, 2025
Thorough, educational, Helpful,
5.0
May 29, 2025
I had a great time meeting with Dr.Day and his staff! He's very understanding doctor who's listening to his patient and making a very wise decision. I will definitely come back and will highly recommend UCLA to anyone's needs. Thank you.
5.0
May 29, 2025
Dr. Day is an excellent doctor. He explains things to me showing diagrams, so that I can understand and picture what he is saying.
5.0
May 29, 2025
Right on top of things
5.0
May 28, 2025
In 20 minutes I learned so much about my blood test results as the doctor was so informative and knowledgeable about my results. The doctor took his time to explain all my questions, very happy with him. UCLA have a great doctor