Close mobile menu×
Close mobile menu

Marcella Donovan Walker, MD

Board Certifications: 
Accepting New Patients
Virtual Visits/Telehealth
Profile Headshot

Schedule an Appointment

Virtual Visits/Telehealth

Virtual Visits allow you to connect with your provider from the comfort, convenience, and safety of your own home.

Schedule Virtual Visit

Phone Appointments

New and Existing Patients:

Connect Patient Portal

For existing patients, login to make an appointment, view documentation or contact your care provider.

Connect Sign In

Credentials & Experience

Board Certifications

  • Endocrinology

Clinical Expertise

  • Bone and Joint Infections
  • Bone and Mineral Metabolism
  • Bone Diseases
  • Bone Metabolism Disorder
  • Bone Tumors
  • Hyperparathyroidism
  • Metabolic Bone Disease

Education & Training

  • Johns Hopkins School of Medicine
  • Residency: Johns Hopkins Hospital
  • Fellowship: NewYork-Presbyterian Hospital/Columbia University Medical Center

Honors & Awards

  • Phi Beta Kappa, Wesleyan University, 1992
  • Hawk Prize for Biochemistry, Wesleyan University, 1993
  • Outstanding Small Group Preceptor Award, Columbia University, College of Physicians and Surgeons, 2008
  • Irving Scholar, 2011-2014

About Marcella Walker

Dr. Walker is an Assistant Professor of Clinical Medicine at the College of Physicians and Surgeons, Columbia University in the Division of Endocrinology. Dr. Walker received her undergraduate training at Wesleyan University (Middletown, CT) and her medical training at the Johns Hopkins University School of Medicine in Baltimore, Maryland. She completed her internship and residency in Internal Medicine at the Johns Hopkins Hospital in 2002 and went on to complete a 3-year fellowship training program in Endocrinology, Diabetes and Metabolism at the College of Physicians and Surgeons, Columbia University. Dr. Walker joined the faculty at the College of Physicians and Surgeons in 2005. Dr. Walker also completed a Masters Degree in Biostatistics and Patient-Oriented Research at the Mailman School of Public Health, Columbia University in 2009.

Dr. Walker is board-certified in Internal Medicine and Endocrinology and is an International Society for Clinical Densitometry-certified Clinical Densitometrist. Dr. Walker's clinical activities involve seeing patients in the Metabolic Bone Diseases Unit at Columbia with a variety of disorders including postmenopausal and glucocorticoid-induced osteoporosis, idiopathic osteoporosis, hyper- and hypoparathyroidism, Paget's disease, fibrous dysplasia, osteomalacia and osteopetrosis.

Dr. Walker also has academic responsibilities which include teaching endocrine pathophysiology to first year medical students and serving as a preceptor for 3rd year medical students during their medicine Clerkship. Additionally, Dr. Walker attends on the inpatient Internal Medicine and Endocrinology consult services with residents and fellows.

Academic Titles

  • Irving Assistant Professor of Clinical Medicine

Hospital Affiliations

  • NewYork-Presbyterian / Columbia University Irving Medical Center


  • Female

Insurance Accepted


  • Aetna Signature Administrators
  • EPO
  • HMO
  • Medicare Managed Care
  • NYP Employee Plan
  • NY Signature
  • POS
  • PPO
  • Student Health


  • Medicare Managed Care
  • Special Needs

Capital District Physician Health Plan

  • Capital District Physician Health Plan


  • EPO
  • Great West (National)
  • HMO
  • POS
  • PPO

Empire Blue Cross/Blue Shield

  • EPO
  • Medicare Managed Care
  • PPO

Health Insurance Plan of NY (HIP)

  • ConnectiCare
  • EPO
  • Essential Plan
  • HMO
  • Medicaid Managed Care
  • Medicare Managed Care
  • POS
  • PPO
  • Select Care (Exchange)
  • Vytra

Local 1199

  • Local 1199

MagnaCare (National)

  • MagnaCare


  • Traditional Medicare


  • Multiplan

MVP Health Care

  • Child/Family Health Plus
  • Essential Plan
  • HMO
  • Medicaid Managed Care

Oxford Health Plans

  • Freedom
  • Liberty

United Health Care

  • Columbia Employee POS
  • Compass (Exchange)
  • HMO
  • Medicaid (Community Plan)
  • Medicare Managed Care
  • POS
  • PPO

*Please contact the provider’s office directly to verify that your particular insurance is accepted.

Contact & Locations

180 Fort Washington Avenue
Room 904
New York, New York 10032


Dr. Walker's major research interests involve the clinical investigation of 1) the cardiovascular effects of vitamin D deficiency, 2) the cardiovascular, neurological and psychiatric manifestations of modern primary hyperparathyroidism and 3) racial differences in skeletal macro/microstructure and bone metabolism. She has received funding from the NIH, National Osteoporosis Foundation, New York Academy of Medicine and the Irving Scholars Program. She has authored numerous articles related to these topics. Dr. Walker is a member of the American Society for Bone and Mineral Research.