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Meet the Doctors

Your Riderwood medical providers

  • Eugenio Machado, M.D.

    Medical Director

    Dr. Machado earned his bachelor's degree in Chemical Engineering from the University of Maryland in College Park, Maryland. He received his medical degree from the University of Maryland Medical School and completed his internship and residency at Maryland General Hospital in Baltimore, Maryland. Dr. Machado is Board Certified in Internal Medicine. He joined Riderwood in February 2004.

  • Loveen Puthumana, M.D.

    Dr. Puthumana received her medical degree and completed her residency at the Government Medical College in Thrissur, India. She completed a three-year residency at Union Memorial Hospital in Baltimore, Maryland. She is Board Certified in Internal Medicine and has a fellowship in Geriatrics. Dr. Puthumana joined Riderwood in November 2003.

  • Mark Parkhurst, M.D.

    Dr. Parkhurst received his bachelor's degree in Zoology and his medical degree from the University of Maryland School of Medicine in Baltimore, Maryland. He completed his residency at Prince George's Hospital in Cheverly, Maryland. Dr. Parkhurst is Board Certified in Internal Medicine. He joined Riderwood in January 2007.

  • Rachelle Alexion, M.D.

    Dr. Alexion received her bachelor's degree in Biology and her medical degree from Johns Hopkins University School of Medicine in Baltimore, Maryland. She completed her residency in Family Practice at Franklin Square Hospital in Baltimore, Maryland. Dr. Alexion is Board Certified in Family Practice and joined Riderwood in September 2007.

  • Andrew Kundrat, M.D.

    Dr. Kundrat received his bachelor's degree in Chemistry from King's College in Wilkes-Barre, Pennsylvania, and his medical degree from Hahnemann Medical College and Hospital/Drexel University College of Medicine in Philadelphia, Pennsylvania. He completed his internship at the Medical College of Virginia in Richmond, Virginia, and his residency at Eastern Virginia School of Medicine in Norfolk, Virginia. Dr. Kundrat is Board Certified in Internal Medicine and Geriatric Medicine. He joined Riderwood in September 2008.

  • Roberto Araujo, D.P.M.

    Dr. Araujo received his bachelor's degree from the University of Maryland in College Park, Maryland, and his medical degree from Temple University School of Podiatric Medicine in Philadelphia, Pennsylvania. He completed his residency in Podiatric Medicine at Kensington Hospital in Philadelphia, Pennsylvania. Dr. Araujo joined Riderwood in December 2005.

  • Eileen Gemmell, C.R.N.P.

    Ms. Gemmell has her bachelor's degree in Nursing and received her master's degree in Nursing from the University of Las Vegas in Las Vegas, Nevada. Ms. Gemmell is certified as a Family Nurse Practitioner. She joined Riderwood in September 2003.

  • Julaine Beth Harding, C.R.N.P.

    Ms. Harding received her bachelor's degree in Nursing from Capital University in Columbus, Ohio. She received her master's degree in Nursing from the University of Maryland in Baltimore, Maryland. She is certified as both an Adult Nurse Practitioner and a Gerontological Nurse Practitioner. She joined Riderwood in March 2010.

  • Roberta Feldhausen, A.P.R.N.-M.H.

    Ms. Feldhausen received one bachelor's degree in Psychobiology from Hood College in Frederick, Maryland, and another in Nursing from Johns Hopkins University in Baltimore, Maryland. She graduated with a master's degree in Adult and Geriatric Psychiatric Nursing from the University of Maryland School of Nursing in Baltimore, Maryland. Ms. Feldhausen is certified in Adult Psychiatric Mental Health Nursing. She joined Riderwood in October 2004.

  • Barbara Harrison, A.P.R.N.-M.H.

    Ms. Harrison received her bachelor's degree in Nursing from McMaster University in Hamilton, Ontario, Canada, and her master's degree in Psychiatric and Behavioral Health Nursing from the University of Maryland in Baltimore, Maryland. She joined Riderwood in May 2006.

  • Patricia O’Donnell, C.R.N.P.

    Ms. O’Donnell received both her bachelor’s degree and master’s degree in Nursing from University of Maryland School of Nursing in Baltimore, Maryland. She is a certified Adult Nurse Practitioner. Ms. O’Donnell joined Riderwood in March 2013.

  • Michaela Crawley Robinson, A.P.R.N.-M.H.

    Ms. Robinson received her bachelor’s degree in Psychology and Nursing from the University of Rhode Island in Kingston, Rhode Island and her master’s degree in Psychiatric Nursing and Community Mental Health from Boston College in Chestnut Hill, Massachusetts. She is certified in Adult Psychiatric Nursing. Ms. Robinson first came to Erickson Living in 2002 as part of the medical team at Oak Crest, our sister community in Parkville, Maryland. She joined Riderwood in February 2013.