Call: 1-202-476-5000

Children's Pediatricians and Associates
About Us
Meet Our Doctors
CPA Offices
Contact Us
Other Pediatric locations
Patient Resources
Children’s Health Centers locations

this page Email This Page
Print this page Print This Page

  Join Us On:
  Follow Children's on Facebook  Facebook
  Follow Children's on Twitter  Twitter
  Watch Children's on YouTube  YouTube

Drs. Smith & Guarinello

Welcome to the Practice of Drs. Smith & Guarinello

Children's Pediatricians & Associates' (CP&A) mission is to provide high-quality care and services to enhance the health and well being of children and adolescents. Our purpose is accomplished through a mutually beneficial and positive relationship with Children's National Medical Center (CNMC). Under experienced physician and management leadership, CP&A shall remain financially stable and maintain the highest ethical standards so that we may strengthen the physician-patient relationship through continuity of care, patient education and advocacy, and practice management.

Meet the Doctors

About Our Practice

Office Location/Hours
We have 2 convenient locations in Melwood and Waldorf to serve you:

9692 Pennsylvania Avenue (Marlboro Pike for Driving)
Upper Marlboro, MD 20772

*Please use downloadable directions. GPS and online directions tools give the wrong information.
Metro Driving Directions

Appointment Phone Line:  301-599-7300
Medical Questions:  301-599-7300
Fax:  301-599-0476

Office Patient Hours:
Monday-Friday:  8:30 am-4:30 pm

Office Phone Line Hours: 
Monday-Friday: 8:00 am – 12:30 pm and 1:30 pm to 4:30 pm

3450 Old Washington Road, Suite 100
Waldorf, MD 20602

Metro Driving Directions
Appointment Phone Line:  301-645-0300
Medical Questions:  301-645-0300
Fax:  301-645-4009

Office Patient Hours:
Monday-Friday:  8:30 am-4:30 pm
Saturday:  8:30 am – 11:30 am

Office Phone Line Hours: 
Monday-Friday: 8:00 am – 12:30 pm and 1:30 pm to 4:30 pm
Saturday:  8:00 am – 11:30 am

Important Phone Numbers

  • Billing Questions:  301-754-3060
  • Emergency:  Dial  911
  • Poison Control:  800-222-1222 (United States National Phone Line) 

Back to Top

Our Services
Our practice offers comprehensive care from infancy to young adulthood. Our services are designed to ensure the healthy development of each child by:

  • Screening for health conditions
  • Administering immunizations against common illnesses
  • Counseling parents on nutrition, safety, and other important topics
  • Diagnosing and managing acute and chronic illnesses

Back to Top

Specialty Referrals
If your child needs a referral to a specialist, because of our affiliation with Children’s National, we can often facilitate a timely referral to their specialists. Our goal is to make every effort to schedule appointments for our patients with Children’s National specialists.  When necessary, we can provide you with a list of specialists in the area who we recommend when we are unable to get a timely specialty appointment at Children’s National. Please note that when scheduling an appointment with a specialist, you need to verify that that provider participates with your insurance. If you have an HMO or POS plan, you will also need to call our office and select the correct extension to request a referral at least 48 hours before the specialist appointment. If you have any questions regarding referrals, please contact your insurance carrier.    

Back to Top

Our Philosophy and Culture
Doctors Smith & Guarinello are board-certified Pediatricians, specializing in the care of infants, children and adolescents. Aileen Raulin and Mary Flynn are certified Pediatric Nurse Practitioners, with many years of experience in providing primary care. They are especially skilled in infant care, child care and parent education. Patients are not assigned to any one doctor, so that we may get to know all of our patients, and so that our patients and their families may also get to know us. We prefer to practice preventive pediatrics, and periodic routine physical examinations are encouraged. These visits provide each child with a thorough evaluation of health concerns, and allow us to monitor growth and development. Immunizations, routine blood and urine tests, and other screening procedures are also done. Please feel free to ask any questions during the examination.

Back to Top

Our History
In 1957, Dr. Hoeck, former Chairman of Pediatrics at Gallinger Hospital (DC General), started this pediatric practice in his home in Hillcrest Heights, Maryland. The practice has been in continuous operation since that time, now serving its third generation of children in Southern Maryland. In 1979, Drs. Smith and Guarinello joined the thriving practice at its Clinton location. In 1985, a second office was opened in Waldorf. In 1995, the Clinton office moved to Upper Marlboro. Over the years, we have been blessed with an outstanding staff of caring individuals who have helped countless children and their parents in Southern Maryland.

In February 1998, the Pediatric Professional Association formerly affiliated with Children's National Medical Center to establish the first pediatric practice in the new Children's Pediatricians and Associates corporation as a subsidiary of CNMC. The practice continues its tradition established in 1957 of providing the very best in pediatric care.

Back to Top

Accepted Health Plans
At Drs. Smith & Guarinello, we participate in many managed care plans, and see patients with traditional insurance. Many plans require that you make a copayment at the time of your visit. To make it as easy as possible for you, we accept cash, checks, and most major credit cards at our offices.

Some insurance plans may require that you get authorization from them before you visit us. Since this differs by plan, please check with your insurance company so you can receive complete benefits from your coverage. We also have trained in-house specialists who can answer many of your insurance questions.

Our practice participates with the following plans. To find out if a particular physician or clinician participates with your plan, please contact our office or your insurance company.

  • Aetna U.S. Healthcare
  • Affordable
  • CCN
  • Capp Care
  • Care First (Blue Cross/Blue Shield of Maryland and the District of Columbia) - includes Capital Care and Freestate
  • Champus
  • Children's National Health Network
  • Cigna
  • First Health
  • George Washington Unversity Health Plan
  • MAMSI - includes Alliance, MDIPA, and Optimum Choice
  • National Capital PPO
  • One Health
  • Private Health Care
  • Tricare
  • United Health Care

Back to Top


Quick Links
Visiting and Staying at Children's
Refer a Patient to Children's
Find A Doctor at Children's
Request an Appointment at Children's
Online Bill Pay
Give to Children's
Get Involved at Children's
Subscribe to Children's RSS Feed