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Areas of Care

Kidney Stone Clinic

About us

The Kidney Stone Clinic is a comprehensive, multidisciplinary kidney stone program designed for patients who suffer from any type of renal stone disease, from simple to complex, using the latest technology available for treatment and prevention of stone formation.  The clinic is made up of an experienced team of urologists, nephrologists, advanced practice nurses, registered nurses and a dietitian. The team provides family-centred care and offer treatments and therapies based on the best evidence. Treatment is tailored to the individual patient based on a variety of factors, including the size and location of the stone, the symptoms caused by the stone and patient's overall medical condition.

Contact us

If you are calling to inquire about your child’s referral from your family doctor or preliminary consultation clinic appointment, call 416-813-6661.

Press #1 – General Info
Press #2 – Referral Info
Press #3 – Dr. Armando Lorenzo or Dr. Darius Bägli
Press #4 – Dr. Walid Farhat, Dr. Martin Koyle, Dr. Frank Papanikolaou or Dr. Roberto Iglesias-Lopes
Press #5 – Dr. Joana Dos Santos or the fellows

If you are calling to inquire about your child’s surgery please contact the surgeon’s administrative staff directly.

Staff contacts for Drs. Bägli and Lorenzo

Davika Ram - Surgical Bookings, Clinical Assistant

Jessica Rosales - Administrative Assistant, Observership/Residents

Staff contacts for Drs. Farhat, Papanikolaou and Koyle

Lisa Abreu - Fellowship Coordinator, Administrative Coordinator

Britney Dwyer - Surgical Bookings, Clinical Assistant
Fax: 416-813-6461

If you cannot come to your scheduled clinic appointment or have a question about your appointment, call the clinic clerk at 416-813-6661. We will try our best to schedule another appointment as soon as possible, based on availability. You may need to leave a message due to the high volumes of calls received. If you leave a message you can expect to hear back from us within 24 hours.

Clinic/registration location

If this is your child’s first visit to SickKids you need to register for your appointment at Clinic Registration near the Atrium entrance on Elizabeth Street. Arrive early so you have enough time to register.

If this is a return visit to SickKids you need to register in the Urology Clinic on Unit 5D.

The Urology Clinic is located on the fifth floor of the Atrium. Take the Atrium elevator to the fifth floor and look for the D sign. That will lead you to 5D.

When you register, a SickKids identification (ID) band will be placed on your child. The band must be worn on your child's arm or ankle at all times. Check your child's ID band to make sure the information is correct. If your child is not wearing a band or has the wrong one, it can lead to errors that can result in the wrong care for your child. Staff must always check the band before providing care to your child. Your child must keep the band on at all times while at SickKids.

If you or your child are sick before your appointment

Call the clinic if you or your child have had a cold, cough, diarrhea, fever or rash within two days of your appointment, or have been sick with or exposed to chicken pox in the last three weeks. Your appointment may need to be rescheduled. 

Tell the clerk, nurse or doctor if your child has been in a hospital outside of Canada within the last 12 months. 

If you cannot come to your child’s appointment, it is important that you call the clinic as soon as possible to cancel and reschedule.

Be on time

If you are late, you may have to wait for other patients to be seen first. Allow lots of time to get to the hospital. It can take some time to get used to finding your way around and it is important to be on time for your child’s appointment. Staff will try to see your child as close to your appointment time as possible. Please understand that some patients being seen ahead of you may need more time than expected, and this can cause delay for others.

Bring the following

  • You must show valid health-care coverage at every visit. If you do not, you will be required to pay a fee for the visit, unless coverage or insurance can be verified.

Proof of health-care coverage must be valid at the time of visit (not expired).

    • If you live in Ontario, show your child’s valid Ontario Health Insurance Plan (OHIP) card.
    • If you live in another province, show your child’s provincial health-care card.
    • If you are a refugee claimant, show your child’s Interim Federal Health Program (IFHP) certificate.
    • If you have private health insurance, show the appropriate information or documentation.
    • If you are receiving support from a Community Health Centre (CHC), show a letter from the CHC.
  • Your appointment card or letter
  • Toys, books, nut-free snacks, diapers and formula to keep your child comfortable and occupied in case there is a wait
  • Any medical information, such as referral letters, test results, information about current therapies, X-rays, MRIs, ultrasounds or CT scans
  • All medications your child is currently taking (in original packaging), including alternative and complementary treatments
  • Urine and/or blood reports

Try not to bring other children to the appointment

If other children must come, please consider taking them to the Play Park during your visit. The Play Park is a free, fun and safe place for brothers and sisters of patients to play. It is open Monday to Friday from 8:30 a.m. to 4 p.m. and weekends from 11:30 a.m. to 3:15 p.m. It is located on the Main Floor of the Atrium, next to the parking elevators. All children over 2 ½ years of age are welcome. Trained staff and volunteers will watch your children carefully. You do not need to book in advance to use the Play Park. The Play Park number is 416-813-8884.

Latex allergy

Call the clinic before coming to the hospital if your child or anyone coming with them has a known or suspected allergy to latex.


All visitor entrances on the Main Floor are wheelchair accessible. SickKids has several wheelchair-accessible washrooms on the Main Floor. Both male and female washrooms in the Atrium have large change tables where children and teens can have diapers changed. There is another private wheelchair-accessible washroom with a large change table on the Service Floor of the Black Wing in Room S213, across the hall from Rehabilitation Services. Wheelchairs are available near the Atrium and University Avenue entrances.

Assistance dogs for children or parents with disabilities are allowed at SickKids. Please make sure they are clean and have up-to-date immunizations.

Interpreter Services

If you need an interpreter, please call the clinic before your appointment so we can arrange for an interpreter. There is no charge for an interpreter. Please give us at least 24 to 48 hours' notice to make it easier for us to find an interpreter for you.

What to expect during your visit

Your child may need to complete some diagnostic tests (renal ultrasound, KUB X-ray), blood work and urine test (urinalysis) prior to seeing the multidisciplinary team in the clinic. Your child’s name will be called and you will be taken to a clinic room. You and your child may meet with several team members depending on your child’s needs.  The appointment will involve an assessment of your child’s current or past health concern, a physical examination and a discussion with you about findings and suggestions for treatment. You will have lots of time to ask questions and give feedback on your child’s plan of care.

If any referrals or follow-up appointments are needed, the clinic coordinator/clerk will be available to assist you with scheduling an appointment. At the end of the appointment, you will be given an appointment card or your appointment will be mailed to you, depending on booking availabilities.

In total, the appointment will take about 30-60 minutes, depending on wait times.

More information:

Division of Urology