Anna Ryabets-Lienhard, DO

Anna Ryabets-Lienhard, DO

Director, Pediatric Bone Program
Attending Physician
Assistant Professor of Clinical Pediatrics, Keck School of Medicine of USC
Clinical Interests

Metabolic and mineral bone disorders
Skeletal genetic disorders


Medical School

Doctor of Osteopathic Medicine (Honors), Western University of Health Sciences, College of Osteopathic Medicine, Pomona, CA


Pediatrics, Children’s Hospital Los Angeles (CHLA), USC Keck School of Medicine, Los Angeles, CA


Pediatrics, CHLA, USC Keck School of Medicine, Los Angeles, CA


Pediatric Endocrinology, CHLA, USC Keck School of Medicine, Los Angeles, CA



American Board of Pediatrics,American Board of Pediatrics, Subspecialty Board, Pediatric Endocrinology


The Endocrine Society 
Pediatric Endocrine Society 
American Diabetes Association 
American Society for Bone and Mineral Research 
European Society of Pediatric Endocrinology

Medical Awards

Featured Poster Presentation 
Pediatric Resident, Outstanding Teaching Award 
Stephen L. Graham, M.D. Academic Excellence Scholarship 
Second Placed Best Research Poster/ Oral Presentation 
Frederic R. Weisman Philanthropic 
The National Dean’s List 
Intensive Summer Anatomy Course 
The National Society of Collegiate Scholars

Specialty Interests

Optic Nerve Hypoplasia/Septo-Optic Dysplasia, Puberty, Hypopituitarism, Metabolic Bone disorders



Akhtar Ali S, Kang H, Olney R, Ramos-Platt L, Ryabets-Lienhard A, Georgia S, Pitukcheewanont P. Quantifying RANKL and OPG levels in healthy children: A large cross-sectional analysis. Bone. 2019 Jun 15;127:215-219. doi: 10.1016/j.bone.2019.06.012. PMID: 31212033

Ryabets-Lienhard A, Akhtar S, Monzavi R, Austin J. 
Meeting Report: 2018 Annual Meeting of the Pediatric Endocrine Society, Toronto, Canada, May 5-8, 2018, Selected Highlights. Pediatr Endocrinol Rev. 2018 Dec;16(2):284-293. 

Akhtar Ali S, Ramos-Platt L, Ryabets-Lienhard A, Georgia S, Pitukcheewanont P "Evaluating RANKL and OPG Levels in Patients with Duchenne Muscular Dystrophy", has been accepted (June 2019) for publication in Osteoporosis International. 

Ryabets-Lienhard, A, Issaranggoon na Ayuthaya, Graham Jr, J, Pitukcheewanont, P. A Case of Severe TBCE-negative Hypoparathyroidism-Retardation-Dysmorphism Syndrome: Case Report and Literature Review. Am J Med Genet A. 2018 Aug;176(8):1768-1772. PMID: 30055029 

Stewart C, Garcia-Filion P, Fink C, Ryabets-Lienhard A, Geffner ME, Borchert M. Efficacy of Growth Hormone Replacement on Anthropometric Outcomes, Obesity, and Lipids in Children with Optic Nerve Hypoplasia and Growth Hormone Deficiency. Int J Pediatr Endocrinol. 2016:5, 2016. PMID: 26937243


Research Summary

Disorders of Pediatric Metabolic Bone Disease
Skeletal Genetic Disorders. 

Research Studies

To collect information on the long-term effects of XLH on children and adults who have participated in burosumab clinical trials, adults and children who have not participated in burosumab clinical...
This study will evaluate the effect of denosumab on lumbar spine mineral density (BMD), as assessed by dual-energy X-Ray absorpitometry (DEXA) at 12 months in children 5 to 17 years of age with GIOP.