Pediatricians specialize in diagnosing and treating a broad range of illnesses in infants, children, and adolescents.


Board Certified Pediatricians

Seasons Pediatrics has over 100 years of combined medical experience and work closely with the community in providing expert pediatric care to patients of Rexburg and the Upper Valley area. Our Pediatric Providers are Robert Lofgran, MD, Douglas Cottrell, DO, Gene Gates, MD, Jason Hymas, MD, and Mark Hammar, PA-C.

Our Pediatricians take time to work one-on-one with families to ensure children get complete, comprehensive care. Parents are always included in the process, and can rest assured that we will be available 24hrs a day for your children.

Services & Treatments Include

Anticipatocalendarry Guidance

Anticipatory guidance offers parents important health information before significant physical or psychological milestones occur in their children.

addressDevelopmental Evaluations

Developmental Evaluations cover growth and progress of both infants and toddlers to ensure proper health development.

_lactation_councelingLactation Consultations

A lactation consultant is a health professional who specializes in the clinical management of breastfeeding.   Read more →

_hypertensionIllness Care

The illnesses children face come with a wide variety of challenges that our pediatricians are highly skilled in caring for.


Vaccines stimulate the body’s own immune system to protect a person against subsequent infection or disease.

_child_wellnessInfant Care

Neonatal or infant care focuses on maintenance and improvement of physical and developmental health needs in infants.

_physical_examsPhysical Exams

Physical Exams study medical history and experienced symptoms, a physical examination can help determine correct diagnosis.

_physical_examsWellness Exams

At this exam our providers will check your infant or child’s growth and development in order to find or prevent problems.

New Patient Forms

Download our New Patient Forms and bring them in to your first appointment.

Schedule An Appointment


(208) 356-0234


(208) 656-8440

Pediatrics Clinic Opening Hours

Monday thru Friday

8:00am - 5:00pm


9:00am - 12:00pm



Our Valuable Team Members

Robert C. Lofgran, MD

Robert Lofgran, MD has been a practicing pediatrician in the Upper Snake River Valley for the past twenty-six years. He was born and raised in rural central Utah and with his family made the move to this area in 1983 after graduating from the University of Utah College of Medicine and completing a pediatric residency at Primary Children’s Medical Center and its affiliated hospitals. He is recognized as a diplomat of the American Academy of Pediatrics.

Gene P. Gates, MD

Gene Gates, MD has been practicing Pediatrics in Rexburg, Idaho since June, 1992. He is originally from Louisiana. His medical education was from LSU Medical Center in New Orleans. His interests include all areas of Pediatric care and Neonatology. He is a diplomat of the American Board of Pediatrics and has done a fellowship in Neonatology.

Douglas G. Cottrell, DO

Douglas Cottrell, DO was raised in Raytown, MO, a suburb of Kansas City. He graduated with honors from Graceland University in Lamoni, IA. He graduated from Kansas City University Hospital, Kansas City, MO in 1982. Dr. Cottrell practiced in the Midwest for the next 24 yrs until moving to Idaho in 2004. During his tenure in the Midwest, he was on the teaching faculties of University Hospital, St. Louis Children’s Hospital and the University of Nebraska School of Medicine. Dr. Cottrell is a recognized Fellow of the American Academy of Pediatrics.

Jason E. Hymas, MD

Jason Hymas, MD grew up in Sugar City. After graduating from Ricks College and BYU-Idaho, he attended the Medical College of Wisconsin in Milwaukee and completed his residency at the Children’s Hospital and Medical Center in Omaha. He is a member of the American Academy of Pediatrics. Dr. Hymas enjoys all of Pediatrics, but has a special interest in preventive medicine, newborn care, and treating childhood obesity.

Mark S. Hammar, PA-C

Mark Hammar, PA-C was born and raised in Rexburg, ID. Following as LDS mission in Hong Kong, he attended Ricks College and later transferred to Idaho State University. He completed his Physician Assistant Studies at Jefferson College of Heath Sciences in Roanoke, VA. He is an active member of the American Academy of Physician Assistants.

Sonya Thompson, IBCLC

Sonya Thompson, IBCLC 

Seasons Adult Medicine | 37 South 2nd East | 1st Floor | Rexburg, ID 83440

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