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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: Santa Clarita Primary & Specialty Care
25775 McBean Parkway
Suite 202
Valencia, CA 91355
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Phone: 661-753-5464
Fax: 661-753-5465

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

Adrenal Disorders
Calcium & Vitamin Deficiency
Calcium and Bone Health Disorders
Cholesterol
Cholesterol in the Blood
The cholesterol in your blood comes from the foods you eat and your liver. Your liver makes all of the cholesterol your body needs. It helps your body make cell membranes, many hormones, and vitamin D.
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Cushing´s Disease
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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Endocrine Disorders in Pregnancy
Endocrine Syndromes
Home Page - Endocrinology
The endocrine system is a complex collection of hormone-producing glands that control basic body functions such as metabolism, growth, and sexual development.
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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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Graves Disease
Hyperthyroidism
Hyperthyroidism means your thyroid gland is too active. This tiny gland is found in your neck. An overactive thyroid gland makes too much thyroid hormone. This makes your metabolism work at a faster rate.
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Hypogonadism
Latent Autoimmune Diabetes of Adults (LADA)
Maturity Onset Diabetes of the Young (MODY)
Overview of Diabetes Mellitus
Diabetes can be defined as a metabolic disorder because the disease affects the way the body uses food to make glucose. This is the main source of fuel for the body. The three main types of diabetes include: Type 1 diabetes; Type 2 diabetes; Gestational diabetes.
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Metabolic Syndrome
Metabolic Syndrome
Metabolic syndrome is a condition that includes the presence of a cluster of risk factors specific for cardiovascular disease. Metabolic syndrome greatly raises the risk of developing diabetes, heart disease, stroke, or all three.
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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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Paget's Disease
Paget Disease of the Bone
Paget disease of the bone is a chronic bone disorder. It causes bones to become enlarged and deformed. Bone may become dense, but fragile, because of excessive breakdown and deformation of bone. The disease is the most common bone disorder after osteoporosis in people older than age 50.
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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
Thyroid Gland
Detailed information on the thyroid gland, including anatomy and function
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Thyroid Cancer
Thyroid Cancer: Introduction
Thyroid cancer starts in the gland called the thyroid. It occurs when cells in the thyroid gland grow out of control.
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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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Tumor

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.

Awards

Super Doctors® Southern California Rising Stars 2021

Andrew Day, MD click here to update your profile

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Patient Stories

Cholesterol in the Blood

Type 1 Diabetes

Type 2 Diabetes

Home Page - Endocrinology

Hormones and the Endocrine System

Hyperthyroidism

Overview of Diabetes Mellitus

Metabolic Syndrome

Osteoporosis

Paget Disease of the Bone

Parathyroid Glands

Disorders of the Pituitary Gland

Diagnosing Diabetes

Thyroid Gland

Thyroid Cancer: Introduction

Disorders of the Thyroid

Thyroid Function Tests