Our Management
Jill Chiascione: Business Office Manager
Joined OCOH in 1992
Joining the practice in November 1992, Jill quickly established our business office. Over the last 25 years she has experienced all matters relating to insurance claims, billing and patient financial matters. Throughout this time she has worked in many medical specialties and finds the practice of oncology to be not only the most interesting and but also the most challenging. As insurance plans and benefits continue to change and evolve, Jill and the business office staff strive to stay ahead of the curve and on top of each permutation of policy to assist and educate patients in all areas relating to medical billing. It is the job of the administrative staff to keep patient satisfaction as one of the primary goals of the business office. This is their top priority.
Charles M. Denny, Chief Operating Officer
With OCOH since 1992
Has been consulting exclusively to the healthcare industry since 1986. He has consulted to OCOH continuously since June 1992 and was appointed the Chief Operating Officer by Dr. VanderMolen in 2006. He has been involved in the recruitment of our current and past physicians, as well as key administrative staff. Provides strategic planning consulting and facilitates the OCOH annual Strategic Planning Retreats. Involved with Cancer Clinics of Excellence (CCE) on behalf of OCOH. Represents OCOH in the recent and ongoing Medicare legislative efforts, including lobbying on Capitol Hill in Washington, D.C. Is a lecturer and workshop presenter to many healthcare organizations and events.
Andres Lopez: Business and Human Relations Manager
Joined OCOH in March 2007
Andres has a Bachelor Degree in Health Services Management and an MBA. He is currently doing a Doctorate of Business Administration. Andres has been working for 16 years in Health Services Management. Andres was given the opportunity to join OCOH and he thinks it is a great company to work for. Andres oversees banking and financial matters, accounts payables, contracts, human resources and vendor relations.
Ellen Youngs: Nurse Manager, R.N.,B.S.N.,O.C.N.
Joined OCOH in 1995
Ellen trained at Molloy College in New York where she received her B.S.N. in 1990. She relocated to California in September 1991, and received her O.C.N. in 1993. Before coming to our practice, Ellen was an Oncology nurse at Hoag Hospital for four years. She is a member of the local and national Oncology Nursing Society Chapters.
Erin O'Neill: Patient Liaison
Joined OCOH in 2002
Erin joined the Business Office staff after having previously worked as a medical secretary for five years at OCOH. She meets personally with all of our new patients to discuss and review insurance benefit information. Erin has been involved in the healthcare field for over 11 years including working for Hoag Hospital's Business Office.
Our Nurses
Letty Barajas: M.A.
Joined OCOH in 2004
Letty is a medical assistant and she is happy working for such a great organization.
Anthony Garcia: L.V.N.
Joined OCOH in 2007
Prior to joining OCOH Anthony was Assistant Manager at WaMu for 13 years. He received his training at St. Francis Career College in Business Management.
Sandra Figueroa, L.V.N.
Joined OCOH in 2009.
Sandra comes to OCOH after along career of 4 years as a CNA, 12 years as an M.A., and 2 years as an L.V.N. Her contribution to OCOH is to share her knowledge and medical experience with patients, as well as caring for them. She has an IV certificate and worked in different specialties.
Vanessa Hawkins: R.N., BSN, OCN
Joined OCOH in 2004
Prior to coming to our Treatment Center Vanessa graduated from Azusa Pacific University in 1999 with a BS in Nursing and a minor in Psychology. After graduation, Vanessa worked for a private practice community based oncology office for 5 years in Pasadena.
Clarissa Higuera: R.N.
Joined OCOH in 2007
Clarissa graduated with honors from Rio Hondo College's nursing program and has worked at White Memorial Medical Center in the Neonatal ICU. The incredible staff and doctors are what attracted Clarissa to seek and join OCOH.
Liwayway Johnson: L.V.N.
Joined OCOC in 2008
Also known as Li, earned her L.V.N. degree at Summit Career College in Colton, California and she trained at Arrowhead Regional Hospital in the Inland Empire. She worked three years as a home health aide in Orange County and one year in the Coumadin Clinic in Irvine before joining OCOH. She wants to be part of a group of highly skilled professionals who are committed to provide excellent service and care.
Denise Kowalski: R.N.
Joined OCOH in 2005
Denise grew up in Germany and received her BSN in Nursing and BA in German at the University of North Dakota in May 2002. She has experience in medical surgery and progressive care.
Haylee Leang: M.A.
Joined OCOH in 2008
Haylee has been in the medical field for six years. She wants to get more experience and learn new things. She is going back to school to enroll in the LVN program.
Jill Mahony: R.N., O.C.N.
Joined OCOH in 1995
Jill graduated in 1991 and worked at Hoag on the Oncology Unit from 1991-1995. She has been an Oncology Certified Nurse since 1993 and has been a member of ONS since 1993.
Cam McKinney: R.N.,O.C.N.
Joined OCOH in 1993
Cam graduated from Golden West College with Nursing Degrees and an ASN from Chapman Universty. She spent over 15 years in Oncology at Hoag Hospital and joined OCOH in 1993. Cam wanted the experience of a new and exciting healthcare environment that OCOH was offering and to provide quality care to patients and family that may enter the facility. She has been with OCOH for 15 years.
Gabriel Rocha, M.A.
Joined OCOH in 2009
Gabriel is a certified medical assistant. He has years of experience as an oncology MA. He feels very motivated working for OCOH and he feels very compassionate and caring.
Cherie Weddle: R.N.
Joined OCOH in 2004
Cherie initially joined our Treatment Center team, as a part-time staff member in July 2004. She graduated from Azusa Pacific University with a BSN in 1999 and has worked as an oncology nurse at Huntington Memorial Hospital and since 2001 at Hoag Memorial Hospital.
Helen Yoo: R.N.
Joined OCOH in 2007
Before joining OCOH Helen worked for Internal/Pulmonary in Fountain Valley for six years and at the detox unit for one year at Garden Grove Hospital as well as being a med/surgery nurse since 2003 in a variety of settings. Helen wanted to join OCOH for the chance to work with patients over a long period of time amongst a team oriented staff.
Carrie Williams, R.N., BSN
Joined OCOH in 2009
Carrie has an Associate’s degree in nursing from Maric College and a Bachelor’s degree in nursing from University of Phoenix . Carrie started in-patient medical/surgical oncology and then moved to outpatient. For a few years she tried other specialties including hospice. She missed working with oncology patients and that was the reason for becoming a nurse. Carrie joined OCOH because she wanted to work in a team oriented and patient centered environment. Carrie is currently working on a master’s degree in nursing.
Christopher Zych: R.N., O.C.N.
Joined OCOH in 2000
Before joining our practice he worked as an Oncology Certified Nurse at Hoag Hospital where he cared for high dose chemo and stem cell transplant patients.
Our Front Office Staff
Frankie Baez : Front Office
Joined OCOH in 2000
Frankie works as a lead front desk clerk at the Treatment Center. He shares his customer service skills on a daily basis and he is proud to be part of such great organization.
Ana Chavez: Front Office
Joined OCOH in 2005
Ana loves to wear a smile. She has been part of OCOH for 5 years. She is very happy to be part of the busy OCOH team. Ana has been in the medical field for 9 years.
Jennifer Erwin: Medical Records
Joined OCOH in 2009
Jennifer works in medical records. She has been in the work force for over 15 years. She is very proud to be a part of the OCOH team.
Ashley Hawkinson: Front Office
Joined OCOH in 2008
Ashley joined OCOH to improve herself and to be able to help others on a daily basis. She has been in the medical field since 2003 and felt that she found her purpose to be able to help others and bring a smile to their face.
Ann Kantor: Supervisor of Medical Records
Joined OCOH in 1992
Ann has been the medical records supervisor for 18 years. Her contribution is to coordinate all the demanding services of medical records. She is a great asset to the practice.
Cindy Marlow: Front Office
Joined OCOH in 2007
Cindy has worked in the medical field in the front office for the last 10 years.
Julie McCullough: Front Office
Joined OCOH in 1991
Julie’s prior experience includes working in various key roles in physician’s offices as well as hospital settings.
Madeline O'Neill: File Clerk
Joined OCOH in 2009
Madeline is a college student who works part time for OCOH. She wanted to work in the medical field because she enjoys working with people.
Victoria Rossi: Administrative Assistant
Joined OCOH in 2007
Victoria has 20 years experience as customer service coordinator. She chose to join OCOH to expand her experience and knowledge in the ever changing medical field.
Our Business Office Staff
Tina Casas, M.A.
Joined OCOH in 2009.
Tina has a certificate in front office, back office, and billing and coding. She has worked for over 13 years in the medical field. She joined OCOH because she wanted to be part of a highly skilled professional medical group.
Nancy Landa: Accounts Receivable Supervisor
Joined OCOH in 2008
Nancy has worked in the medical field since 1993. She has done oncology billing for 14 years. She wants to lend her knowledge of oncology to make a successful billing department.
Frank Quesada: Patient Account Representative
Joined OCOH in 2007
Prior to coming to O.C.O.H. Frank obtained a BS and MS in Oriental Medicine Acupuncture with an AA in Psychology. He has been in the medical field in a variety of roles including medical assistant, physical therapy assistant and supervisor. He states, "I join OCOH because I want to make a difference in patient quality of life."
Crystal Meyer: Financial Counselor
Joined OCOH in 2009
I want to bring my knowledge of the many financial assistant programs available to patients. My background in the medical field started in 2003 with a national DME provider. In 2008 I worked for a hematology/oncology office and I knew I wanted to continue my growth in this field. Crystal will be working at the business office assisting all OCOH patients with their financial needs.
Buford Schmieder: Courier
Joined OCOH in 2008
Buford took early retirement and now works as a courier for OCOH. He spent four years in the Air Force and 40 years at VONS supermarket.
Renee Stitt: Administrative Assistant
Joined OCOH in March 2010
Renee has 17 years of experience in the medical field working in various key roles at Hoag Hospital and physician’s office settings. Renee will be working as an administrative assistant and patient support, rejoining after previously working for OCOH for seven years. Renee’s prior experience includes Radiology, Nuclear Medicine, Oncology/Hematology and Bariatrics. She is passionate about working in the medical field.