Meet Our Providers


Chief Medical Officer

Ching Wang, MD, FACP

Location: Yuma Internal Medicine Clinic.
Specialty: Internal Medicine.
Med School: Universidade Federal de Rio de Janeiro, Rio de Janeiro, Brazil, graduated December 1989.
Residency: New York Methodist Hospital in Brooklyn, NY, completed training June 1995.
Certification: Board certified with the American Board of Internal Medicine, 1996, re-certified in 2006.
Preceptor: South University School of Nursing, Midwestern University.
Joined Sunset August 1996.

Associate Medical Director 

Saika Somjee, MD

Location: Somerton Pediatric Clinic.
Specialty: Pediatrics / Pediatric Hematology - Oncology.
Med School: Seth G. S. Medical College, Mumbai, India, graduated June 1993.
Residency: Louisiana State University Health Science Center, Metaire, LA, completed training June 2007.
Fellowship: Pediatric Hematology-Oncology, Louisiana State University Health Science, Metaire, LA, completed training June 2005.
Certification: Board certified with the American Board of Pediatrics, 2007. Board certified with the American Sub-Board of Pediatric Hematology-Oncology, 2009.
Preceptor: Northern Arizona University.
Academic Appointment- Director of Pediatrics Clinical
Education: Outpatient, YRMC Family Medicine Residency Program.
Joined Sunset July 2007. 

 Certified Nurse Midwife 

 
Delia Montopoli, CNM, MSN, OGNP-C

Location: Sunset Women's Medical Group - Yuma and San Luis Clinic.
Specialty: Certified Nurse Midwife / Health Nurse Practitioner.
School: University of Chile School of Medicine, Santiago, Chile, completed training 1976.
University of Wyoming School of Nursing,
Laramie, WY, completed Master degree 1995.
Certification: Board certified with American Midwifery Certification Board, 1995.
Board certified with the National Certification Corporation for the Obstetric, Gynecologic and Neonatal Nursing Specialties.
Master Degree in Nursing Education, 1993.
Preceptor: Frontier Nursing University, Georgetown Nursing University, Midwestern University, Northern Arizona University, Maryville University.
Joined Sunset March 1996.
 
Melody J. Castillo, CNM, FNP-C

Location: Sunset Women’s Medical Group - Yuma and San Luis Clinic.
Specialty: Certified Nurse Midwife / Family Nurse Practitioner.
School: Vanderbilt University School of Nursing, Nashville, TN, completed May 2014.
Certification: Board certified with the American Midwifery Certification Board, 2013. Board certified with the American Academy of Nurse Practitioners.
Preceptor: South University School of Nursing.
Joined Sunset July 2014.
 
Karina M. Robbins, CNM

Location: Sunset Women’s Medical Group - Yuma Clinic.
Specialty: Certified Nurse Midwife.
School: University of Utah, Salt Lake City, Utah, completed May 2008.
Certification: Board certified with American Midwifery Certification Board, 2008. Preceptor: Frontier University.
Preceptor: Frontier University.
Joined Sunset August 2014.

Family Medicine  

Sathya Vemuri, MD

Location: Yuma North Clinic.
Specialty: Family Medicine.
Med School: Gandhi Medical College, Hyderabad, India, graduated January 1996.
Residency: St Joseph Hospital and Medical Center, Paterson, NJ, completed training June 2002.
Certification: Board certified with the American Board of Family Medicine, 2002, re-certified in 2009.
Joined Sunset August 2002.
 
Pamela Sharp, FNP-BC

Location: Somerton Clinic - Extended Hours.
Specialty: Family Nurse Practitioner.
School: Regis University, Denver, CO, graduated May 2014.
Certification: Board certified with American Nurses Credential Center, 2014.
Joined Sunset September 2014.
 
Katelyn Squire, PA-C

Location: San Luis Clinic.
Specialty: Physician Assistant / Family Medicine.
School: Midwestern University, Glendale, AZ, graduated August 2014.
Certification: Board certified with the National Commission on Certification of Physician Assistant, 2014.
Preceptor: Midwestern University.
Joined Sunset September 2014.
 
Richard A. Scott , FNP-C, DC

Location:
Yuma Internal Medicine Clinic.
Specialty: Family Nurse Practitioner.
School: Maryville University, St. Louis, MO, graduated August 2015.
Certification: Board certified with the American Academy of Nurse Practitioners, 2015.
Joined Sunset November 2015.
  
Rabia Khan, FNP-C

Location: San Luis Clinic.
Specialty: Family Nurse Practitioner.
School: Georgetown University, Washington, DC, graduated December 2015.
Certification: Board certified with the American Academy of Nurse Practitioners, 2016.
Joined Sunset March 2016.
 

 Thomas Culwell, PA-C

Location: Somerton Clinic.
Specialty: Physician Assistant.
School: Midwestern University, Glendale, AZ, graduated August 2011. 
Certification: Board certified with the National Commission on Certification of Physician Assistant, 2011.
Joined Sunset October 2016.

 

 

General Dentistry

Satish Kumar, DDS

Location: Somerton Dental Clinic.
Specialty: General Dentistry.
Dental School: Government Dental College and Hospital, Amristar, India, graduated April 1979.
Joined Sunset March 1993.
 

Miriam Gonzalez, DMD

Location: San Luis Dental Clinic.
Specialty: General Dentistry.
Dental School: Midwestern University College of Dental Medicine, Glendale, AZ, graduated June 2016.
Joined Sunset August 2016.

 

Internal Medicine 

Maria Fereira-Caroz, MD

Location: Somerton Internal Medicine Clinic.
Specialty: Internal Medicine.
Med School: University of  Zulia, Maracaibo, Venezuela, graduated December 2003.
Residency: Morehouse School of Medicine, Atlanta, GA, completed training June 2014.
Certification: Board certified with the American Board of Internal Medicine, 2014.
Joined Sunset November 2014
 
Oliver Severino, MD

Location: San Luis Internal Medicine Clinic.
Specialty: Internal Medicine.
Med School: University of the Philippines, Manila, Philippines, graduated May 2000.
Residency: The Jewish Hospital of Cincinnati, Cincinnati, OH, completed training June 2005. 
Certification: Board certified with the American Board of Internal Medicine, 2005, re-certified 2015.
Joined Sunset August 2005.

David J. Atondo, FNP-C

Location: Yuma North Clinic.
Specialty: Family Nurse Practitioner.
School: Northern Arizona University, Flagstaff, AZ, graduated May 2013.
Certification: Board certified with the American Academy of Nurse Practitioners, 2013.
Joined Sunset August 2013.
 
Mohammad Zargarian, MD

Location: Yuma Internal Medicine Clinic.
Specialty: Internal Medicine.
Med School: Universidad de Santiago (UTESA), Santo Domingo, Dominican Republic, graduated January 1989.
Residency: St. Luke's Memorial Hospital, Ponce, Puerto Rico, completed training June 2001.
Certification: Board certified with the American Board of Internal Medicine, 2007.
Joined Sunset November 2015.
 
Richard Fortney, PA-C

Location: Somerton Internal Medicine Clinic.
Specialty: Physician Assistant / Internal Medicine.
School: Northern Illinois University, Dekalb, IL, completed Bachelors and Master, May 1987.
Certification: Board certified with the National Commission on Certification of Physician Assistants, 1992, re-certified in 2007.
Joined Sunset February 2007.
 
Ana Marie Rivera, MSN, FNP-C

Location: Yuma Internal Medicine Clinic.
Specialty: Family Nurse Practitioner.
School: University of Arizona, Tucson, AZ, graduated 2004.
Certification: Board certified with the American Academy of Nurse Practitioner, 2004.
Joined Sunset December 2013.

 Obstetrics and Gynecology 

Terry A. Lewis, MD, FACOG

Location: Sunset Women’s Medical Group - Yuma Clinic.
Specialty: Obstetrics and Gynecology.
Med School: University of New Mexico, Albuquerque, NM, graduated 1974.
Certification: Board certified with the American Board of Obstetrics and Gynecology, 1981.
Residency: Naval Regional Medical Center, Oakland, California, 1978.
Joined Sunset February 2014.
 
Angel R. Temponi Zabala, MD

Location: Sunset Women’s Medical Group - Yuma and San Luis Clinic.
Specialty: Obstetrics and Gynecology.
Med School: Emory University School of Medicine, Atlanta, GA, graduated June 2014.
Residency: Emory University School of Gynecology and Obstetrics, graduated June 2014.
Certification: Board certified with the American College of Obstetricians and Gynecologists, 2014.
Preceptor: Walden University, Indiana State University, Grand Canyon University College of Nursing, Northern Arizona University.
Joined Sunset July 2014.

Pediatrics

Raymond Hatton, MD

Location: Yuma Pediatric Clinic.
Specialty: Pediatrics.
Med School: University of Louisville Medical School, Louisville, KY, graduated June 1970.
Residency: Medical College of Ohio, Akron, OH, completed training December 1975.
Certification: Board certified with the American Academy of Pediatrics, 1977, re-certified 2012.
Joined Sunset August 1998.
 
Ahmad Ashfaq, MD

Location: San Luis Pediatric Clinic.
Specialty: Pediatrics.
Med School: King Edward Medical College, Lahore, Punjab, Pakistan, graduated April 2006.
Residency: Harlem Hospital Center, Columbia University Medical Center, New York, NY, completed training June 2013
Certification: Board certified with the American Board of Pediatrics, 2014.
Preceptor: South University School of Nursing.
Joined Sunset September 2013.
 
Mwela N. Asombang, MD

Location: Yuma Pediatric Clinic.
Specialty: Pediatrics.
Med School: Kasturba Medical College, Karnataka, India, graduated March 2005.
Residency: Cardinal Glennon Children’s Medical Center, Saint Louis University School of Medicine, St. Louis, Missouri, completed training June 2013
Certification: Board certified with the American Board of Pediatrics, 2014.
Joined Sunset September 2013.
 

Adil I. Baig, MD

Location - North Yuma Clinic. 
Specialty - Pediatrics.
Med School - King Edward Medical University, Lahore, Pakistan, graduated April 2008.
Residency - Metropolitan Hospital Center, New York Medical College, New York, NY, completed training June 2016.
Certification - Board Eligible.
Joined Sunset August 2016

Jay Kumar, MD

LocationYuma Pediatric Clinic.
SpecialtyPediatrics.
Med School - Liaquat University of Medical and Health Sciences, Jamshoro, Pakistan, graduated February 2006.
Residency - Metropolitan Hospital Center, New York Medical College, New York, NY, completed training June 2016.
Certification - Board Eligible.
Joined Sunset August 2016 

Mohamed Nagiub, MD

Location - North Yuma Clinic.
Specialty – Pediatrics / Pediatric Cardiology
Med School – University of Alexandria, Alexandria, Egypt, graduated October 2000.
Residency - St. John Providence Children Hospital, Detroit, MI, completed training August 2013.
Fellowship - Richmond Children Hospital at VCU, Richmond, VA, completed training August 2016.
Certification - Board Certified with the American Board of Pediatrics, 2013.
Joined Sunset September 2016

 

 

 

 

 

 

Locations / Hours

Click here for detailed contact information and hours of operation.

SAN LUIS MEDICAL
Medical: (928) 627-3822
Pharmacy: (928) 373-5757
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SAN LUIS DENTAL
Dental: (928) 627-8584
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YUMA MEDICAL
Medical: (928) 819-8999
Pharmacy: (928) 819-8941
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NORTH YUMA MEDICAL
Medical: (928) 539-3140
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SOMERTON MEDICAL
Medical: (928) 627-2051
Pharmacy: (928) 627-1607
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SOMERTON DENTAL
Dental: (928) 627-8806
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WELLTON MEDICAL
Medical: (928) 785-3256
Pharmacy: (928) 785-3256
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WELLTON DENTAL
Medical: (928) 785-8808
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Locations

Yuma - 24th St building-yuma24 2060 W. 24th Street
Yuma, AZ 85364
(928) 819-8999 - Medical
(928) 819-8941 - Pharmacy Click here for map
North Yuma building-yumaB 675 S. Avenue B
Yuma, AZ 85364
(928) 539-3140 Click here for map
Somerton building-somerton 115 N. Somerton Avenue
PO Box 538
Somerton, AZ 85350
(928) 627-2051 - Medical
(928) 627-8806 - Dental
(928) 627-1607 - Pharmacy Click here for map
San Luis building-sanluis 815 E. Juan Sánchez Blvd.
PO Box 2017
San Luis, AZ 85349
(928) 627-3822 - Medical
(928) 373-5757 - Pharmacy
Click here for map
San Luis Dental building-sanluis 801 N. 2nd Avenue
PO Box 2017
San Luis, AZ 85349
(928) 627-8584

Click here for map

Wellton building-wellton 10425 Williams Street
P.O. Box 686
Wellton, AZ 85356
(928) 785-3256 Medical
(928) 785-8008 Dental
(928) 785-3256 Pharmacy Click here for map