Home About Us Providers



Karunyan Arul, M.D.

Chief Medical Officer/ Endocrinology/Pediatrics

Dr. Arul has been practicing Pediatric Medicine and Endocrinology in the Antelope Valley for over 30 years. He is Board Certified in Pediatrics and Board Certified in Pediatric Endocrinology and past Board Certification in Quality Assurance and Utilization Review. He was founder and Medical Director of Sierra Medical Group from 1984-2006. He oversees professional medical staff and mid-levels, assist in the development of policies and procedures as well as Quality Assurance and Medical Advisory Committees. Dr. Arul is mainly located in our Lancaster clinic and primarily focuses on Diabetes and Endocrinology.


Donovan  Spencer, M.D.


Dr. Spencer is a Board Certified Pediatrician. He has 15 years’ experience working in Community and Public Health Clinics. He is a graduate of Wright State University School of Medicine and received his Residency training at Michigan State University.  Dr. Spencer is located in our Palmdale clinic.


Gifty-Maria Jane Ntim, M.D. MPH

Pediatrics/Internal Medicine

Dr. Gifty completed her Residency in Pediatrics and Internal Medicine at Tulane University School of Medicine and where she was the Chief Resident. She received her MD from St. George’s University and is Boarded in Pediatrics and Internal Medicine in the fall.  She works out of our Palmdale office.


Mervyn Katz, M.D.


Dr. Katz is a Board Certified Pediatrician. He has 40 years’ experience working in group pediatric practices including Lakeside, Keystone and Granada Medical Group. He is affiliated with Holy Cross Hospital in Mission Hills. He received his Medical Degree from State University of New York and did his residency at Children’s Hospital in Denver, Long island Jewish Hospital and Beth Israel Hospital. He is working out of our Palmdale office.


Quan Luong, D.O.


Dr. Luong is a Board Certified Pediatrician. She received her Doctorate of Osteopathic Medicine from Philadelphia College of Osteopathic Medicine and completed her Residence from Michigan State University Pediatric Practice. She has worked in rural and community clinics including Skagit Pediatrics, Richmond Pediatric, Yakima Valley Farm Workers Clinic and Franklin County Pediatrics.  Dr. Luong is working out of our Lancaster Health and Wellness Center.


Diane Chin, M.D. PhD

Dr. Chin attended Louisiana State University School of Medicine and graduated in 2005. She did her internship and a year in Internal Medicine Residency at University of Southern California Medical Center and completed 2 years of Ophthalmology Residency at Louisiana State University and Kansas State University. She has worked at All-Inclusive Community Health Center from November 2011 through April 2012. Dr. Chin works at both the Lancaster and Palmdale locations.


Samuel Silao, M.D.

Dr. Silao received his M.D. from Loma Linda University and his Residency was with Riverside General Hospital. He has additional certifications in Geriatric Medicine. He operates his own Family Practice/Urgent Care in Chino Hills and also started Palmdale Medical Group that operated an Urgent Care next to our Lancaster Clinic.


Charles P. Ognibene, M.D.

Dr. Ognibene received his M.D. from the University of Bologna, Italy. His Residency was at San Bernardino County Medical Center and Board Certified in Family Practice. He has worked at a number of Urgent Care and other primary care clinics throughout the Antelope and San Fernando Valley including Sierra Medical Group and Molina Medical Group. He is located at our Lancaster clinic.


James Gocke, RN, MA, FNP

Family Nurse Practitioner

Located in our Lancaster clinic, Jim Gocke, R.N., FNP has over 25 years’ experience in health care including Recreational and Respiratory Therapy and RN. He received his MSN in Family Nurse Practitioner from USC in 1995; he has practiced at AV Hospital and AV Hospital Emergency Room and started the hospital’s Sexual Assault Program.


Shawn Mostafania, PA-C

Physician Assistant

Shawn Mostafania, PA-C received his Bachelors of Science in Physician Assistant Studies from the University of Southern California. He has nine years’ experience working in a variety of settings including LAC-USC Medical Center Emergency Room, Urgent Cares and Department of Corrections.  Shawn works in our Lancaster clinic and also in our Mobile Van Units.


Diane  Bite, RN, MA, FNP

Family Nurse Practitioner

Diane Bite, RN graduated from the UCLA Family Nurse Practitioner program. Diane has been an RN for about ten years and has worked at Antelope Valley Hospital and Lancaster Community Hospital.  She is currently working at our Palmdale location and also serves part-time as our Director of Clinical Services.


Rich Emanuel, RN, MSN, FNP

Family Nurse Practitioner

Rich Emanuel, RN graduated from University of Phoenix with his MSN/FNP and received his RN Degree from LA County USC School of Nursing. He has over 16 years of experience as an ER and Critical Care Nurse. Rich sees patients in our Lancaster locations.


Charity Stauter, RN, MA, FNP

Family Nurse Practitioner

Charity Stauter, RN, MA attended University of Phoenix where she received her Bachelor of Science of Nursing and then received her Master’s of Science in Nursing and Family Practitioner. She also worked as a Clinical Nurse Preceptor at Antelope Valley Hospital Emergency room for 6 years. Charity primarily works at our Lancaster Clinic


Chanthol Pen, MSN, FNP-BC

Family Nurse Practitioner

Chanthol Pen graduated from Regis College in Weston Massachusetts with her Master’s of Science in Nursing in May 2009. She worked at Flagler Hospital in St. Augustine Fl. until moving to California in 2011. She worked at First Health Medical Clinic in Lancaster prior to arriving at AVCC. Chanthol pen works at both Lancaster and Palmdale clinics.


Dan Shepard, PA-C

Dan Shepard received his Physician Assistant degree from the US Army Academy of Health Sciences and his Bachelors Degree from University of State of New York. He has worked as a Physician Assistant with the US Army and was a Special Forces Medic. He has worked for Molina Medical Group in Lancaster for the last 17 years and woks out of our Lancaster Clinic.


Michael Gales, PA-C

Michael Gales graduated from University of Southern California and served in the Navy and Reserves as a EMT. He has almost 30 years of experience as  Physician Assistant worked at Samuel Dixon Health Center in Santa Clarita as well as SCV Quality Care and Henry Mayo Family Medical Center in Santa Clarita. He will primarily be located at our Lancaster Clinic.

Oghenesume D. Umugbe, M.D.


Dr. Umugbe received his MD from the University of Benin, Nigeria in 1991 and is Board certified in Psychiatry.  He completed his Residency at Howard University Hospital in Washington DC and Wake First University Baptist Medical Center in Winston Salem, NC.  he has worked at several California State Prisons including Napa State, Atascadero and Lancaster. He has a private practice in Lancaster CA. Dr. Umugbe provides psychiatric evaluations and treatment for AVCC on a part-time consulting basis.


Traci Spriggs Moreno, Psy.D.

Director of Mental Health Services/Clinical Psychologist

Dr. Moreno received her Bachelor’s Degree from Florida State University, her Masters in Mental Health Counseling from Nova Southeastern University in Florida and her Doctorate in Psychology from Alliant International University in Los Angeles. She worked as a Clinical Psychologist and Senior Psychologist at California State Prison in Lancaster prior to her arrival at AVCC in May 2012.


Tara Garrett, MA, LCSW

Tara received her Bachelor’s Degree and Masters Degree in Social Work from California State University Long Beach. She is a Licensed Clinical Social Work and has worked for the California Department of Corrections, Providence Holy Cross in Mission Hills and Hathaway Children and Family Center. She sees both adults and children in our Lancaster Health and Wellness Center. She is also working towards her Doctoral Degree in Clinical Psychology.

, Powered by Joomla! | Web Hosting by SiteGround