Telehealth Visits are Available. Dr. Tibayan is rated as a Distinguished provider by MediFind in the treatment of Vitamin B12 Deficiency. His top areas of expertise are Breast Cancer, Paget Disease of the Breast, Drug-Induced Thrombocytopenia, and Iron Deficiency Anemia.

Randy Calegari is an Oncologist in Las Vegas, Nevada. Dr. Calegari has been practicing medicine for over 21 years and is rated as an Experienced provider by MediFind in the treatment of Vitamin B12 Deficiency. His top areas of expertise are Thrombocytopenia, Lung Cancer, Pleuropulmonary Blastoma, and Myelodysplastic Syndrome (MDS).

Telehealth Visits are Available Hamidreza Sanatinia, MD is a medical oncologist at Comprehensive Cancer Centers of Nevada (CCCN). He is board certified in internal medicine and medical oncology. Cancer affects every one of us. I believe in treating the patient as if we are treating our own family members. As a physician, it is our duty to give the best and most current advice to our patients. I encourage academic discussion and the sharing of the latest research among physicians to improve the lives of our patients. We are well trained in treating diseases; but the overall care of the patient as a whole comes first.Cancer affects every one of us. I believe in treating the patient as if we are treating our own family members. As a physician, it is our duty to give the best and most current advice to our patients. I encourage academic discussion and the sharing of the latest research among physicians to improve the lives of our patients. We are well trained in treating diseases; but the overall care of the patient as a whole comes first. Dr. Sanatinia is rated as an Advanced provider by MediFind in the treatment of Vitamin B12 Deficiency. His top areas of expertise are Paget Disease of the Breast, Agranulocytosis, Chronic Familial Neutropenia, and Acute Mountain Sickness.

EDUCATIONDr. Gollard attended University of California, Los Angeles for his undergraduate and masters studies. In 1980, he completed his bachelors in English and received his masters in English in 1983. Dr. Gollard received his medical degree from the University of Southern California School of Medicine in 1990. He completed his internal medicine internship in 1991 at the University of Southern California and his internal medicine residency at the University of Southern California Medical Center in 1993. In 1996, Dr. Gollard completed his fellowship in the Division of Hematology and Oncology at the Scripps Clinic and Research Foundation.AREAS OF SPECIAL INTERESTSpecializes in general medical oncology, hematology, leukemia, lymphoma, sarcomas and medical humanities.EXPERIENCE Dr. Gollard is a medical oncologist-hematologist at Comprehensive Cancer Centers of Nevada (CCCN). He has served on numerous committees and boards. He also teaches for the Honors College at University of Nevada, Las Vegas (UNLV) and mentors both pre-medical and medical students.He has authored many articles for medical journals and lectured all over the United States. Dr. Gollard has also received numerous awards and accolades, including the Squibb Award for Outstanding Scientific Research, the Irving Lasky Award for Outstanding Achievement in Research and being named an Outstanding Hematologist/Oncologist by numerous publications.Prior to joining CCCN, he was an oncologist at Cancer & Blood Specialists of Nevada and previously had a private practice at Nevada Cancer Center. He has been practicing in Las Vegas since 1996.BOARD CERTIFIED Internal MedicineMedical OncologyHematologyHospice and Palliative MedicineMEMBERSHIPS IN PROFESSIONAL ASSOCIATIONSAmerican Association of Cancer ResearchAmerican College of Physicians – FellowAmerican Medical AssociationAmerican Society of Clinical OncologyAmerican Society of HematologyAmerican Society of Internal MedicineClark County Medical SocietyNevada State Medical Association. Dr. Gollard is rated as an Advanced provider by MediFind in the treatment of Vitamin B12 Deficiency. His top areas of expertise are Acute Mountain Sickness, Alpha Thalassemia, Alpha Thalassemia X-Linked Intellectual Disability Syndrome, Childhood Iron Deficiency Anemia, and Bone Marrow Aspiration.

Lisa Matthews is a Physician Assistant in Las Vegas, Nevada. Ms. Matthews has been practicing medicine for over 38 years and is rated as an Experienced provider by MediFind in the treatment of Vitamin B12 Deficiency. Her top areas of expertise are Smoldering Multiple Myeloma, Vitamin B12 Deficiency, Myeloproliferative Neoplasms (MPN), and Small Lymphocytic Lymphoma (SLL).

Claire Hiles is a Hematologist and an Oncologist in Las Vegas, Nevada. Dr. Hiles has been practicing medicine for over 15 years and is rated as an Experienced provider by MediFind in the treatment of Vitamin B12 Deficiency. Her top areas of expertise are Severe Congenital Neutropenia, Anemia, Chronic Familial Neutropenia, Agranulocytosis, and Gamma Knife Radiosurgery.

Sowjanya Reganti is a Hematologist Oncology specialist and a Hematologist in Reno, Nevada. Dr. Reganti is rated as an Experienced provider by MediFind in the treatment of Vitamin B12 Deficiency. Her top areas of expertise are Paget Disease of the Breast, Breast Cancer, Familial Colorectal Cancer, and Familial Pancreatic Cancer. Dr. Reganti is currently accepting new patients.

Frederick Tanenggee is a primary care provider, practicing in Internal Medicine in Henderson, Nevada. Dr. Tanenggee has been practicing medicine for over 31 years and is rated as an Experienced provider by MediFind in the treatment of Vitamin B12 Deficiency. His top areas of expertise are Type 2 Diabetes (T2D), Osteomyelitis in Children, Nephrosclerosis, and Renovascular Hypertension.

Juan Cattoni is a Hematologist Oncology specialist and a Hematologist in Reno, Nevada. Dr. Cattoni is rated as an Experienced provider by MediFind in the treatment of Vitamin B12 Deficiency. His top areas of expertise are Familial Pancreatic Cancer, Astrocytoma, Gliosarcoma, and Embryonal Tumor with Multilayered Rosettes. Dr. Cattoni is currently accepting new patients.

Santhosh Ambika is a Hematologist Oncology specialist and a Hematologist in Reno, Nevada. Dr. Ambika is rated as an Experienced provider by MediFind in the treatment of Vitamin B12 Deficiency. His top areas of expertise are Lung Cancer, Pleuropulmonary Blastoma, Follicular Lymphoma, Hodgkin Lymphoma, and Bone Marrow Aspiration. Dr. Ambika is currently accepting new patients.

Donna Kelly is a Nurse Practitioner in Laughlin, Nevada. Ms. Kelly is rated as an Advanced provider by MediFind in the treatment of Vitamin B12 Deficiency. Her top areas of expertise are Vitamin B12 Deficiency, Vitamin D Deficiency, Yaws, and Seasonal Affective Disorder (SAD). Ms. Kelly is currently accepting new patients.

Dana Forte is a primary care provider, practicing in Family Medicine in Las Vegas, Nevada. Dr. Forte is rated as an Advanced provider by MediFind in the treatment of Vitamin B12 Deficiency. Her top areas of expertise are High Cholesterol, Type 2 Diabetes (T2D), Insomnia, and Hypothyroidism. Dr. Forte is currently accepting new patients.

Anuradha Thummala is a Hematologist Oncology specialist and a Hematologist in Las Vegas, Nevada. Dr. Thummala is rated as an Advanced provider by MediFind in the treatment of Vitamin B12 Deficiency. Her top areas of expertise are Paget Disease of the Breast, Breast Cancer, Lung Cancer, and Iron Deficiency Anemia.

Syed Pervaiz is a Pediatrics specialist and a Hospital Medicine provider in Las Vegas, Nevada. Dr. Pervaiz is rated as an Advanced provider by MediFind in the treatment of Vitamin B12 Deficiency. His top areas of expertise are Hypertension, Obesity in Children, Urinary Tract Infection in Children, and Vitamin D Deficiency.

Dhan Kaushal is a Hematologist Oncology specialist and a Hematologist in Las Vegas, Nevada. Dr. Kaushal is rated as an Advanced provider by MediFind in the treatment of Vitamin B12 Deficiency. His top areas of expertise are Acute Mountain Sickness, Iron Deficiency Anemia, Chronic Familial Neutropenia, and Agranulocytosis.

Michael Yudez is a primary care provider, practicing in Family Medicine in Las Vegas, Nevada. Dr. Yudez is rated as an Advanced provider by MediFind in the treatment of Vitamin B12 Deficiency. His top areas of expertise are Hypertension, Glucocorticoid-Remediable Aldosteronism, Familial Hypertension, and Insomnia.

Imran Ahmed is a Hematologist Oncology specialist and a Hematologist in Las Vegas, Nevada. Dr. Ahmed is rated as an Advanced provider by MediFind in the treatment of Vitamin B12 Deficiency. His top areas of expertise are Thrombocytopenia, Acute Mountain Sickness, Pulmonary Embolism, Knee Replacement, and Endoscopy.

Qui Thai is a primary care provider, practicing in Internal Medicine in Las Vegas, Nevada. Dr. Thai is rated as an Advanced provider by MediFind in the treatment of Vitamin B12 Deficiency. His top areas of expertise are Respiratory Alkalosis, Insomnia, Parinaud Oculoglandular Syndrome, and Tension Headache. Dr. Thai is currently accepting new patients.

Stacey Lythgoe is a Nurse Practitioner in Las Vegas, Nevada. Ms. Lythgoe is rated as an Advanced provider by MediFind in the treatment of Vitamin B12 Deficiency. Her top areas of expertise are Vitamin B12 Deficiency, Myeloproliferative Neoplasms (MPN), Vitamin D Deficiency, and Gastroesophageal Junction Cancer.

Telehealth Visits are Available Oscar B. Goodman Jr., MD, PhD, is a medical oncologist and clinical researcher at Comprehensive Cancer Centers of Nevada (CCCN). He is board certified in internal medicine, medical oncology, and hematology with expertise in genitourinary malignancies. Dr. Goodman also participates in various basic, translational and clinical research studies, most recently focusing on circulating tumor cells by using the cells as the basis for personalized therapies against prostate and other cancers.I believe that taking care of my patients is the greatest privilege and responsibility that can be bestowed in our society. I strive to treat every patient as I would want a member of my family to be treated under the circumstances. I communicate honestly and directly to the patient, not by sugar-coating. I hold the patient-physician partnership as the key to one day eliminating all human suffering related to cancer and blood diseases, and aim to do so one patient at a time. Dr. Goodman is rated as an Experienced provider by MediFind in the treatment of Vitamin B12 Deficiency. His top areas of expertise are Prostate Cancer, Chronic Familial Neutropenia, Agranulocytosis, Severe Congenital Neutropenia, and Orchiectomy.