MEET THE DOCTOR:                                         Board Certified Cardiologist - Board Certified Electrophysiologist


View My Board Certification Status                            

Walter Kusumoto M.D. M.P.H.

Physician/Medical Director/Business Administrator (onsite)

Director of Electrophysiology Enloe Medical Center

Dr. Kusumoto graduated with his Doctor of Medicine from St. Louis University, School of Medicine in 1995 and finished his residency in Internal Medicine at UC Davis in 1998. Subsequently, in 2001, Dr. Kusumoto finished his fellowship in Cardiology, followed by a fellowship in Clinical Cardiac Electrophysiology in 2002, both degrees earned while studying at the Oregon Health Sciences University. Dr. Kusumoto then earned a Master’s Degree in Public Health in 2003, also at the Oregon Health Sciences University in Portland, Oregon. Beginning in 2002 the doctor first began to practice medicine in his field of Electrophysiology for Colorado Permanente. In 2005 the doctor left Colorado Permanente after accepting a recruitment offer from Enloe Medical Center in Chico, CA.

From 2005 until current, the doctor has served the Chico, California community as Enloe Medical Center’s Director of Electrophysiology. It was in 2005 that Dr. Kusumoto founded the Arrhythmia Center of Northern California (ACNC) where he has served his patients and the Northstate in his individual provider practice, until December 31, 2016.  


Beginning January 01, 2017 Arrhythmia Center of Northern California, Inc. (ACNC) officially began to see its patients under Dr. Kusumoto's newly formed medical group.  It is with great enthusiasm that Walter T Kusumoto, M.D. M.P.H. CEO makes this official announcement that moves him closer to his dream of bringing innovative cutting-edge quality patient arrhythmia services to California's Northstate. 


Please stay tuned for news of the addition of another board certified Electrophysiologist (physician) to our team in 2017.


Publications Raitt M; Kusumoto W. “Correlations Among the Frequencies of Atrial Activity on the Surface Electrocardiogram, Intracardiac Atrial Electrograms and the Atrial Effective Refractory Period in Patients with Atrial Fibrillation.” Journal of Electrocardiology, Jan 2012.

Raitt M; Kusumoto W; Giraud G; Mcanulty J. “Reversal of Electrical Remodeling After Cardioversion of Persistent Atrial Fibrillation.” Journal of Cardiovascular Electrophysiology, May 2004. 15(5): 507-512.

Raitt M; Kusumoto W; Giraud G; Mcanulty J. “Electrophysiologic Predictors of the Recurrence of Persistent Atrial Fibrillation Within 30 Days of Cardioversion.” American Journal of Cardiology, Jan 2004. 93(1): 107-110.

Okuyama T.; Waheed A; Kusumoto W; Zhu Xl; Sly WS. “Carbonic Anhydrase IV: Role of Removal of C-terminal Domain in Glycosylphosphatidylinositol Anchoring and Realization of Enzyme Activity.” Archives of Biochemistry and Biophysics, July 10, 1995. 320(2):315-322.

Book Kusumoto W.; Kusumoto F. “Wide Complex Tachycardia.” ECG
Chapter Interpretation, Publication pending 2003.

Vicki - Office Manager
HIPAA Security Officer / Ombudsman

Vicki serves the Arrhythmia Center of Northern California (ACNC) in the capacity of Office Manager, Ombudsman, and HIPAA Security Officer. Because Dr. Kusumoto’s primary concern is the well-being and care of his patients, Vicki’s goal is to provide support to Dr. Kusumoto, his management team, staff and patients. Patient complaints and HIPAA issues are handled by Vicki. Primarily, it is Vicki's goal to ensure that ACNC's patients and staff know that they are valued.

Maria - Manager I (HR)

Maria is the Arrhythmia Center of Northern California's (ACNC's) Finance and Human Resource Manager. Because Maria has worked many years in the medical industry, she also serves ACNC as a skilled Medical Assistant who rooms patients on Clinic Days. On non-clinic days, Maria is responsible for ACNC's employee and other business recordkeeping. It could be rightly said that Maria is responsible for some of the basic "nuts and bolts" of ACNC's business operation. On days that would otherwise become chaotic, Maria quickly becomes our calm in the eye of a storm. Maria has strong problem solving skills and when she doesn't know an answer she will do everything within her power to find a solution.  In many ways Maria is a backbone to the practice.

Carmen C  - Manager II (Chart Check)

Carmen joined the Arrhythmia Center of Northern California (ACNC) as an office assistant and worked her way up to medical assistant in charge of chart check.  She manages our accounts payable and accounts receivable while  also training in other practice management duties.  It is Carmen who will answer questions about insurance credentialing, business licenses and corporate issues.  During her time with ACNC Carmen has helped us create a Policy and Procedure Book and has assisted the doctor and Maria in other management duties.    

On clinic days, patients will see Carmen as she works on behalf of the doctor with the rest of medical team to room patients and record vitals.  We are grateful to have Carmen on our team.

Lysa - RN

Lysa joined the Arrhythmia Center of Northern California (ACNC) on November 10, 2020.  In her experience, she has provided general nursing care for patients in physician's offices and hospitals.  We welcome Lysa as she joins our team to assist Dr. Kusumoto to provide quality cutting edge patient care,    

On clinic days, patients will see Lysa with the doctor, during their appointments. Additionally, Lysa serves ACNC as our Principal RN, Clinical Staff Education Supervisor, and she also manages the Remote Device Care appointments. Often times, when patients call with questions it will be Lysa who will answer general patient concerns and.or triage what information warrants Dr. Kusumoto's attention.

Crystal - CMA (Procedure Scheduling)

Crystal began working as temporary part-time employee for the Arrhythmia Center of Northern California (ACNC) in November of 2013. Crystal instantly fit in with this practice and was promoted to a permanent full-time medical assistant and put in charge of scheduling patient procedures at Enloe.  In this capacity she works directly with the doctor, hospital and patient to coordinatie all of the necessary details.  Because Crystal is detail oriented, she is perfect for this job.  She takes great care and pride in the service she provides to our patients. 

We are thankful for Crystal's expertise.  In these duties, she works closely with Dr. Kusumoto to ensure the best possible experience for the patient.  Additionally, Crystal works on clinic days to room patients, take vitals and updates patient prescription information etc. On non-clinic days she works diligently on procedure scheduling.  Again, we are thankful for Crystal and the patient care she provides.

Elizabeth - Medical Biller

Elizabeth began working with the Arrhythmia Center of Northern California (ACNC) in October of 2016 as a medical receptionist, next in 2017 she trained as a medical assistant assigned and began to coordinate new patient referrals, then beginning in November 2020 Liz became our medical biller.  Recently, Elizabeth has completed her prerequisites for the Nursing Program at Butte College and is looking forward to applying to nursing programs. 

Notably, it is Elizabeth's constant attention to detail and dedication to prompt accurate patient service that makes her a perfect complement to Dr. Kusumoto and ACNC's team.  If you run into a billing problem, it is Elizabeth who will help you out.


Zulema - Medical Assistant (New Patient Referrals)

Arrhythmia Center of Northern California's (ACNC) welcomes Zulema as a new in training medical receptionist.  Zulema has been ACNC's Medical Receptionist since the spring of 2020.  She is dedicated and accurate and cheerful.  Zulema will often be a patient's first contact with Arrhythmia Center.  

Zulema manages our new patient referrals from Primary Care Physicians and Cardiologists.  Dr. Kusumoto works with Zulema to process service for urgent and non-urgent referrals.  She is responsible for setting up the patient account in our Electronic Health Record (EHR), obtaining medical records, verifying insurance and for scheduling that first appointment.  

On clinic days, patients may interact with Zulema as she works with our other medical assistants to room patients and take vitals for the doctor.


Carmen - Administrative Assistant

Carmen began working for Arrhythmia Center of Northern California (ACNC) early 2013 as a medical  receptionist, then in 2014 Carmen was trained and became our Medical Biller but also worked as a medical assistant when needed.  Beginning in November 2020, to accommodate Carmen's educational goals, Carmen will be assisting ACNC in administrative tasks and on clinic days will be floating between positions.     

One day you might spot her at the receptionist window while another she may be working as a medical assistant, helping out with billing or assisting management with administrative tasks.  We are thankful for Carmen and appreciate her gregarious personality, winning smile, and her love for working with people. Her dedication to accuracy and detail sets her apart. Notably, it is Carmen's willingness to go the extra-mile to help our patients out that wins the day.

We are thankful to have Carmen on our team.

Amy Perez - Medical Receptionist

It is Arrhythmia Center of Northern California's (ACNC) receptionist, Amy, who normally will be your first contact at our office, whether by phone or in person.  The medical receptionist will expertly answer questions or get you in contact with a staff member who can best assist you.  Amy joined us in 2021.  She is dedicated to manage your medical data in a way that can ensure the best possible medical service.      

Because accurate and frequent patient data maintenance is required, our medical receptionist will verify and update BOTH email &  insurance coverage and copy insurance cards at each visit.  Because medical billing is done electronically, Amy]  will be responsible for verifying your email address at each visit and working with you to make sure that you can access your medical records and billing in your Patient Health Record (PHR) account.  Additionally, our medical receptionist will be responsible for your annual registration packet and  will make sure that your packet is attached to your electronic health record which can be viewed in your patient health record (PHR).   

Other duties performed by our receptionist are to collect co-pays, payments on account balances, make appointments, perform appointment check-in and check-out; as well as verify home address, email address and phone numbers at each visit.  Of course she will be your first contact when scheduling appointments or calling to speak with our nurse or medical assistants.  The receptionist is here for our patients!