Primary Care Pediatrician, Longwood

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A street view of our Longwood primary care pediatricians' office building.

The waiting room has a television that plays kids' movies.

Our exam rooms are spacious and well-equipped to care for kids of all ages, newborns to teens.

The interior of our pediatric primary care office is bright and colorful.

A view of our pediatric primary care office from the lobby entrance.

The building's entrance has a covered, drive-thru drop-off for your convenience.

Hours of Operation

This office is only seeing well patients.

Monday–Friday: 8 a.m. to 5 p.m.

Saturday: This office is temporarily closed on Saturdays. Appointments may be made at our Lake Nona location.

NOTE: We will open regular business hours on Friday, July 3 and closed on Saturday, July 4.

Complimentary Meet-and-Greet Appointments

Walk-In Sick Care

Walk-in hours have been suspended to make certain we can maintain social distancing.

Important Numbers

Fax: (407) 830-4907
Poison Control: (800) 222-1222
Emergencies: 911

Why Choose Us

For more than 25 years in Longwood, our primary pediatricians and staff have cared for kids from birth to age 18. We cherish being your family’s resource for preventive and wellness information and services, vaccinations and routine care for everyday childhood illnesses and bumps and bruises.

Your Child's Patient-Centered Medical Home

We are a certified Patient-Centered Medical Home, which means your child receives coordinated care that meets stringent national standards. Here, we take a team approach to caring for your child, and you are an important member of the team. Learn More »

Families choose us for comprehensive pediatric primary care and:

focus on prevention, whole-child wellness and effective management of chronic conditions
family inclusion in care decisions
coordination of services, including those outside our office

We also offer expertise and services such as:

an FAAP-certified pediatrician committed to lifelong learning (Fellow of American Academy of Pediatrics)
expertise in behavioral and developmental disabilities
obesity management and prevention
access to Nemours pediatric experts in a wide range of specialties, close to home
24/7 online doctor visits with Nemours pediatricians via CareConnect
seamless physician access electronic health records so we're all on the same page
online patient portal and email communication with caregivers through MyNemours

First Visit

For the first visit, a child must be accompanied by a parent or legal guardian with proof of custody.

Language(s) Spoken

English, Spanish

Interpreter Services:

available for most languages
available for hearing impaired with advance notice

Doctors & Care Teams

Madhushree Desiraju, MD

Practicing Since: 1999
Languages Spoken: Telugu

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Appointment Online »

SallyAnn Marchi, PA

Practicing Since: 2014
Languages Spoken: English

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Alfonso Mireles, MD

Practicing Since: 1984
Languages Spoken: Spanish

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Appointment Online »

Map & Directions

Our primary care pediatrics office is conveniently located in the medical campus at South Seminole Hospital off of W. State Road 434.

Extra Safety Measures

We have taken every possible precaution to make sure our locations are safe for you and your children, including:

COVID-19 screening for everyone
safeguards for social distancing
everyone over 2 y.o. must wear mask
deep cleaning daily

Locations & Services

Children can get the full spectrum of pediatric care through our extensive network.

The Best Measles Protection: Vaccination

The United States is seeing the highest number of measles cases since 1994, with reports in 24 states. Call your doctor to make sure your family’s vaccines are up to date.

Learn More About Protecting Your Child »

24/7 Online Doctor Visits

See a Nemours pediatrician for minor illnesses and injuries 365 days a year with on demand doctor visits. Access a live video visit from your mobile device or computer.

Learn More »