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Specialty:: Medicine, Endocrinology - Diabetes and Metabolism
Department Affiliation:: Medicine
State License:: A143775
Phone:: 661-753-5464
Health Plans:: Accepted Plans

About Me

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

Links

uclahealth.org/santa-clarita
uclahealth.org/endocrinology

Primary Office: UCLA Health Santa Clarita - Primary & Specialty Care
Primary Address: 25775 McBean Parkway
Suite 202
Valencia, California 91355
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Phone: 661-753-5464

Medical Board Certifications: Internal Medicine, American Board of Internal Medicine, 2016
Certification 2: Endocrinology, Diabetes and Metabolism, American Board of Internal Medicine, 2018
Fellowship: Endocrinology Diabetes & Metabolism, UCLA School of Medicine, 2016-2018
Residency: Internal Medicine, University of Wisconsin Hospitals and Clinics, 2013-2016
Degree: Temple University School of Medicine, MD, 2013

Interests

Bone
Calcium & Vitamin Deficiency
Diabetes Type 1
Type 1 Diabetes
In type 1 diabetes, the body can’t make insulin. Insulin is needed to help sugar (glucose) enter cells for energy. Read on to learn more about this condition that often develops in children or young adults.
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Diabetes Type 2
Type 2 Diabetes
When your body can't make enough insulin or can't use insulin, it is called type 2 diabetes. Insulin helps the cells in the body absorb glucose, or sugar, for energy. Without insulin, glucose builds up in the blood resulting in high blood sugar.
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General Endocrinology
Hormones and the Endocrine System
The endocrine system uses hormones to control and coordinate your body's internal metabolism (or homeostasis) energy level, reproduction, growth and development, and response to injury, stress, and environmental factors.
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Hypogonadism
Osteoporosis
Osteoporosis
Osteoporosis is a disease that causes weak, thinning bones. This leaves the bones at greater risk of breaking. The bones most often affected are the hips, spine, and wrists.
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Parathyroid
Parathyroid Glands
Parathyroid glands produce parathyroid hormone, which plays a key role in the regulation of calcium levels in the blood. Precise calcium levels are important in the human body, since small changes can cause muscle and nerve problems.
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Parathyroid Disorders
Parathyroid Glands
Parathyroid glands produce parathyroid hormone, which plays a key role in the regulation of calcium levels in the blood. Precise calcium levels are important in the human body, since small changes can cause muscle and nerve problems.
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Pituitary Disorders
Disorders of the Pituitary Gland
Detailed information on pituitary gland disorders, including acromegaly, diabetes insipidus, empty sella syndrome, hypopituitarism, and pituitary gland tumors.
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Pre-Diabetes
Diagnosing Diabetes
According to the National Institute of Diabetes and Digestive and Kidney Diseases: People over age 45 should be tested for prediabetes or diabetes. If the first blood glucose test is normal, they should be retested every 3 years. If you are younger, you should be tested if you are at high risk.
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Thyroid Disorders
Disorders of the Thyroid
Detailed information on disorders of the thyroid, including hyperthyroidism, Graves' disease, toxic nodular goiter, thyroiditis, hypothyroidism, Hashimoto's thyroiditis, thyroid tumor, hypothyroidism and pregnancy, postpartum thyroiditis, and thyroid horm
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Thyroid Nodules
Thyroid Function Tests
Detailed information on the most common types of thyroid function tests
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Publications

Day A, Yeh M, Livhits M. Surgery for Hyperthyroidism Lowers Cardiovascular Mortality Compared with Radioactive Iodine. Clinical Thyroidology. Jan 2018; 30: 15-17.
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.
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.
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.
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.

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Patient Stories

Type 1 Diabetes

Type 2 Diabetes

Hormones and the Endocrine System

Osteoporosis

Parathyroid Glands

Parathyroid Glands

Disorders of the Pituitary Gland

Diagnosing Diabetes

Disorders of the Thyroid

Thyroid Function Tests