Address:                                              17034 Bellflower Blvd.  90706

Clinic Hours:

Mon-Fri  9:00am – 8:00pm  by appointment   

Saturday 9am – 5pm  Appointments  & Walk-ins

Clinic: (562)-991-1568

Emergencies: Call 911

“Life gets better with Apex”

Dr. Appolonia Olumba, DNP, MSN/FNP-C, PMHNP-BC.
Primary Care Nurse Practitioner

Dr. Olumba has been practicing as a nurse practitioner since 2008. She is a board certified Psychiatric Mental Health Nurse Practitioner, and a board certified Family Nurse Practitioner. She attended Azusa Pacific University for her Doctor of Nursing Practice (DNP) degree and graduated in 2018. She attended California State University Dominguez Hills for her Master of Science in Nursing / Family Nurse Practitioner and graduated in 2008. She obtained a post graduate certificate in Psychiatric Mental Health Nurse Practitioner at National University in 2018. Dr. Olumba received her bachelor of science in nursing (BSN) in 1997 from the University of Southern California (USC). Dr. Olumba is a hardworking individual who believes in success through hard work and academic excellence. She has extensive background and wealth of knowledge in several areas of practice in both medical and mental health care over the years. She works as a PCMH primary care provider in an outpatient internal medicine clinic, and urgent care clinic in Los Angeles. She also works as a Psychiatric Mental Health Nurse Practitioner in an outpatient mental health clinic. She also had experience in correctional medicine at the Los Angeles County jail, with Los Angeles County Sheriff. Dr. Olumba also worked as a CHDP nurse practitioner with the Los Angeles Unified School District. As an individual who believes in education and the future of nursing profession, Dr. Olumba has also work as an adjunct faculty
with Azusa Pacific University, and National University school of Nursing, training future
Psychiatric mental health nurse practitioner.

“From my experience, personal connections and continuous care are the most important things. Therefore I always take the time to get to know my patients.”

Dr. Olumba

About Our Practice

At APEX Healthcare Services, we provide comprehensive primary care services for both medical and mental health conditions. Our clinic is staffed by experienced healthcare professionals who are dedicated to providing you with the highest level of care possible. We offer convenient walk-in hours, as well as appointments, so you can always get the care you need when it’s most convenient for you. Plus, we accept most major insurance plans, making it easy to get the care you need without breaking the bank. Contact us today to schedule your appointment!

Our Mission

Apex Health Care Services’ mission is to provide excellent medical and mental health care to patients across lifespans. Promote a healthy lifestyle and maintain wellness to patients of all ages, races, gender, or sexual orientation. As a patient care-centered clinic, our patients and their well-being are our most essential responsibility. We are committed to caring for the patient as a whole person with dignity, respect, compassion, and empathy.

Our Promise To You


Our goal is to provide our patients with the most convenient healthcare services so there are no barriers to acquiring the high quality care they need.


Being genuine, listening, understanding, encouraging and empowering is our approach to helping our patients live a more healthier life.


We believe that trust, confidentiality and professionalism is key to the wellbeing of our healthcare team and our patients.

Words from Our Patients