Donald R Massee MD, Radiologist

Donald R Massee MD

Radiologist | Diagnostic Radiology

4445 Magnolia Ave Riverside CA, 92501


Dr. Donald Massee is a radiologist practicing in Riverside, CA. Dr. Massee specializes in diagnosing and treating injuries and diseases using medical imaging techniques such as X-Rays, magnetic resonance imaging and computed tomography exams. These techniques offer accurate visibility to the inside of the patients body and help to detect otherwise hidden illnesses so that they can be treated quickly and efficiently.

Education and Training

Loma Linda University School of Medicine 1986

Board Certification

RadiologyAmerican Board of RadiologyABR

Provider Details

Donald R Massee MD
Donald R Massee MD's Expert Contributions
  • What is a lung PET scan?

    -Know your medications and allergies -Limited carbohydrate diet for 24 hours prior to the date of your appointment -Do not eat or drink anything except water for 6 hours prior to the exam -Drink plenty of water -Take routine medications. Take your diabetic medication no less than 4 hours prior to the examination -Arrive 15 to 30 minutes prior to your exam -An IV will be started. In some cases, isotope and contrast are administered -Duration of the exam is up to 2 hours -Breathing instructions should be followed -Hydrate after the examination READ MORE

  • Breast mammogram vs. breast ultrasound for tumors?

    Mammograms are currently the only recognized asymptomatic screening exam. Mammograms are recommended annually beginning at the age of 40 (ACR guidelines). Mammography has been recommended to start up to a decade before a 1st degree relative was diagnosed with breast cancer. US is an excellent supplemental exam for dense breasts. MRI is currently recommended if there is a +20% lifetime chance of breast cancer. If a 35-year-old patient is symptomatic, then a diagnostic mammography and breast US should be ordered for initial evaluation. READ MORE

  • Is it safe for a 10 year old child to have an MRI performed?

    MRI does not use radiation and, along with ultrasound, is the best imaging for children. Of course, the indication for imaging must always be factored in. READ MORE

  • Is an MRI scan safe for children?

    Yes, an MRI brain is very safe for children. MRI is considered the best imaging modality of the brain. If contrast is used request a macrocyclic gadolinium agent such as Gadavist, Prohance or Dotarem. These agents have the best safety profile and are unlikely to allow the accumulation of free gadolinium in the body. READ MORE

  • Should a radiologist inform the patient about the test results?

    Radiologists interpret medical imaging and provide reports to ordering physicians. The reports are increasingly available directly to patients through the electronic medical record. The radiologist under certain circumstances may give the imaging results directly to the patient especially if the results are urgent. Please still keep your doctor's appointment they may have additional lab results and would be important in the treatment plan. READ MORE

  • Why is my 8 year old son complaining of knee pain?

    Depending on the symptoms, your orthopedic surgeon may order an MRI of the knee. READ MORE

  • Is an MRI scan painful?

    MRI scans are not painful. READ MORE

  • Is an MRI used to diagnose kidney stones?

    CT abdomen/pelvis is the most accurate imaging modality to diagnose kidney, ureteral and bladder stones. US renal can be used to diagnose hydronephrosis, which may be associated with an obstructing ureteral stone. Sometimes the stones are visualized, but US is less sensitive than CT. An X-ray of the abdomen called a KUB may be used, but is less sensitive than CT. MRI is rarely used for stones because it is not sensitive, time consuming and expensive. READ MORE

  • Can radiation therapy work for arthritis?


  • Is a CT Scan safe during pregnancy?

    A CT scan of the head is considered safe during pregnancy because the dose to the abdomen, pelvis, and fetus is negligible. MRI of the brain could be performed as an alternative exam. Regards, Donald Massee, MD READ MORE

  • How many CT scans in a span of one month are considered safe?

    I would like to say first that if imaging is necessary for a medical purpose, it is considered safe and appropriate. Each CT of the abdomen and pelvis has a dose of approximately 10 mSv. This is the same as the background radiation dose we are all exposed to in our lives during a 3-year period. Radiologists and radiology technologists try to keep CT doses as low as possible while achieving diagnostic images. The newest CT scanners have the ability to give the same information with lower doses. When possible, if the information is comparable, we will use US or MRI. These modalities do not require radiation. READ MORE

  • Is there a difference between pediatric radiology and adult radiology?

    Hi, The technology is the same for adults and children, but with children, radiation doses are decreased when a CT scan or radiography is required. Whenever possible, alternative imaging modalities not using radiation, such as US or MRI, are used in the pediatric population. Pediatric radiologists have additional training in techniques, preferred imaging modalities, and have additional expertise in the pediatric disease spectrum. Regards, Donald Massee, MD READ MORE


  • Loma Linda Univ Med Ctr, Diagnostic Radiology
  • Loma Linda University Medical Center
  • Brigham & Women's Hospital Program
  • Morristown Medical Center

Faculty Titles & Positions

  • Loma Linda Univ Med Ctr, Diagnostic Radiology
  • Loma Linda University Medical Center
  • Brigham & Women's Hospital Program


  • Indiana University Medical Center


  • Memorial Sloan Kettering Cancer Center

Philanthropic Initiatives

  • Providing surgical care to indigent patients in central and south America. Co-founder of UHMLA (Unidad Hospitalaria Movil de Latino America)

Teaching and speaking

  • John Hopkins Faculty

Accepted Insurance

+ See all 13 Insurance

Donald R Massee MD's Practice location

Practice At 4445 Magnolia Ave

4445 Magnolia Ave -
Riverside, CA 92501
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New patients: 951-788-3400
Fax: 951-788-3194

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