Dr. Marina Ivashchenko's Practice is now Westminster Medical Clinic South.
​Accepting appointments with Dr. Bryan Petti in Lone Tree.

9892 Rosemont Avenue, #201, Lone Tree, CO 80124
t (303) 428-7449
f (833) 741-2199
A Note from Dr. Ivashchenko ~ I have retired as of Monday, 8/15/2022. Westminster Medical Clinic has agreed to accept patients from my practice and their clinic is expanding to my previous office location in Lone Tree. Dr. Bryan Petti is available in this location late August and Katie Ballard, Nurse Practitioner, will join in later this year. Please call Westminster Medical Clinic to establish care with a local, small practice at 303-428-7449. Dr. Petti and his staff will be in Lone Tree hosting an Open House in August, and each month through December. Watch this website for dates of future Open Houses to meet and greet them!

Important Information 

As of Monday, August 15th, 2022 –
  • All patients who would like to transition will need to complete New Patient paperwork as soon as possible.
  • New Patient Appointments are available generally beginning in October! Call 303-428-7449 to schedule now for October in the Lone Tree location. You may also schedule anytime at the Westminster location to get established as a patient. 
  • Sameday visits are available for all of your acute or sick needs, such as sore throats, flu/cold/covid symptoms, x-ray, pains, and strains at the main location in Westminster (approximately at Highway 36 and Sheridan). Dr. Petti will have some sameday availability daily also, but limited for a couple months.
  • Westminster Medical Clinic will be mailing, emailing and/or calling every patient with a Medicare or Medicare Advantage plan to ask if you would like to schedule with Dr. Bryan Petti. They would like to begin seeing these patients now since many patients have many prescriptions and needs. Do not wait for Westminster Medical Clinic to call you to schedule or request a prescription refill if you need one! Please call our office at 303-428-7449 now.
  • No prescription refills will be given over the phone or from a pharmacy prescription refill request. All patients wanting to transition from Dr. Ivashchenko to Westminster Medical Clinic will need a New Patient appointment.
  • Westminster Medical Clinic providers will be on-call for you After-Hours. If you are experiencing a life-or-death emergency, please call 911. For all other needs, call 303-428-7449. 

Need to pay a balance? Questions about Statements and Insurance? 

Call RPM Billing using the Toll-Free phone# below. Westminster Medical Clinic is unable to answer questions. 

Need medical records from Dr. Ivashchenko?

Request medical records from Desert River Solutions by clicking this link. Then click the button "Access the Records Release Form". Complete the form. Desert River Solutions will send your records!

If you have any questions or concerns, you can reach Desert River Solutions using the information below. 
requests@DesertRiverSolutions.com  (Email) 
480-577-3150 (Phone) 
520-214-0068 (Fax)

A new Patient Portal! 

As you transition from Dr. Ivashchenko to Westminster Medical Clinic, you will want to switch to the Westminster Medical Clinic Patient Portal. To learn more and register as a patient in the new Patient Portal, click here.