Start exploring the all-new Children's Medical Group website. Take a tour.

Children’s Medical Group
Book an appointment
Rhinebeck  Choose another location
Hero Image 1
Hero Image 2

Quality pediatric care in your neighborhood

Schedule appointment (845) 452-1700

Your patient-centered medical home (PCMH)

Placing you and your child at the center of our care

Learn more

We're Children’s Medical Group! Providing kids healthcare in Rhinebeck

For more than 40 years, parents have been choosing us for their children’s healthcare. We support kids’ futures using evidence-based practices and the latest technologies to provide the highest quality of care.

(845) 452-1752

  • Monday: 8AM–5PM
  • Tuesday: 8AM–5PM
  • Wednesday: 8AM–7PM
  • Thursday: 8AM–5PM
  • Friday: 8AM–5PM
  • Saturday: Closed
  • Sunday: Closed

Loading map...

Visit our pediatric office

Children’s Medical Group offers a warm, kid-friendly environment designed to ease anxiety and make every visit comfortable for both children and parents.

Our Office

Extended & weekend hours

Children’s Medical Group has the most extensive hours of any private practice in the Hudson Valley.

Learn more

Patient-centered medical home and NCQA accredited

Our Patient-Centered Medical Home program is certified by the National Committee for Quality Assurance (NCQA) for achieving high standards of care.

Learn more

Same-day appointments

If your child is sick and needs care ASAP, make Children’s Medical Group your first call for a same-day appointment.

Learn more

Meet our team

Christian Hietanen, DO, MS

Christian Hietanen, DO, MS

Board-Certified Pediatrician

Carolyn Hirschmann, DO

Carolyn Hirschmann, DO

Board-Certified Pediatrician

Marcella Spera, MD

Marcella Spera, MD

Board-Certified Pediatrician

Dana Larkin Mitchell, MSN, PNP-PC, RN

Dana Larkin Mitchell, MSN, PNP-PC, RN

Nurse Practitioner

A message from our Chief Medical Officer

At Children’s Medical Group, we’re passionate about keeping Rhinebeck’s kids healthy and happy. Guided by our core values—Care, Accessibility, Reliability, and Excellence—we’re proud to support families like yours with trusted, innovative pediatric care. Whether you’re new or a long-time patient, thank you for trusting us. We look forward to being part of your health journey.

C. Rocky Slonaker, M.D., CHCO, FAAP 


A comprehensive resource for vaccines in 2026

A comprehensive resource for vaccines in 2026

Keeping your children safe is top priority, but the new CDC schedule changes can be complex. Vaxfacts.info provides concise, pediatrician-supported clarity from our nationwide network of pediatricians and can help you make informed decisions on your child’s vaccine schedule.

Vaxfacts.info
Our families love us

thoroughly explain solutions and care.

Great experience. The staff is welcoming and helpful in making my son feel comfortable. They listen well and thoroughly explain solutions and care.

Daniel B.

A consummate professional in a field where medical rigour and communication skills of her high calibre are the cornerstone of an outstanding practice.

Our first time at CMG Rhinebeck. Dr Spiro was focussed, knowledgeable and empathetic. A consummate professional in a field where medical rigour and communication skills of her high calibre are the cornerstone of an outstanding practice.

Christian F.

They treat you like you’re family.

We love CMG. They treat you like you’re family and truly care about their patients. We LOVE Dr. Lee but all the doctors are wonderful! Thank you all for taking such good care of our boy!

Jaclynn S.

Compassionate and kind.

We love Dr. Spera! Compassionate and kind and so knowledgeable. Everyone on staff today was lovely and helpful and wonderful with kiddos.

Hillary L.

Dr. Lee.

My daughter got the best care tonight with Dr. Lee.

Jean H.

immediate assistance via phone calls.

Outstanding experience since day one. We have had excellent care and educated conversation on the various topic throughout our child’s development. We have also experienced the need to be seen immediately and receive urgent medical advice and guidance to which we have had immediate assistance via phone calls and fitting us into a different office to be seen when our son was sick for the very first time. An experience that is always scary for even the most seasoned mom and provider. As a mom and health care provider myself, I have been very happy with our experiences at this practice with all of the practitioners even with Dr hirchman being our main provider

Marissa Marie G.

they had a great time talking with her and sharing all the things they are doing.

I love Dr. Spera, she is so kind with the kids. We were there for our annual physical yesterday, and you can tell that she genuinely loves her job and working with kids. My kids do not love to go to the doctors, as most kids, but they had a great time talking with her and sharing all the things they are doing. I highly recommend seeing Dr. Spera, well in all honestly, I have never had a bad interaction at the Rhinebeck location. All of the doctors and nurses are great!

nicole d.

very positive experience.

We’ve always had a very positive experience at Children’s Medical Group with all the doctors in the practice (we love Dr. Spera) and the entire staff who work there. They are empathetic, professional, kind, a great balance of not over-prescribing but weighing various paths and answering questions clearly. I have two kids who have been going there for five+ years, and I’ve never had a bad experience. A deep thanks to everyone there!

Marina C.

Dr. Spera is so wonderful!

Dr. Spera is so wonderful! She has been seeing our son since we brought him home from the hospital. Her compassion and knowledge have helped us navigate being first time parents. Her staff always make us feel comfortable and we know our son is in wonderful hands with Dr. Spera and her staff. I cannot recommend her enough! Thank you for all you do & being so wonderful to all the children you take care of!

Jennifer L.

Have visited 5 or 6 different locations.

Have been with the CMG for 25 years and still going for another 5. Have visited 5 or 6 different locations. Doctors and staff always knowledgeable and friendly. Highly recommend!

Tamara P.

We accept most major insurances

Children’s Medical Group accepts many major insurance plans, including New York State Medicaid and Child Health Plus plans.

View all insurances accepted

Keeping kids healthy in Rhinebeck

doctor-with-kid.jpg

Ready when you are

Schedule an Appointment