Psychologist | Clinical Psychology

Dr. Dena Z Olwan, PHD

401 Douglas Street, Suite 504, Sioux City, Iowa, 51104-1471

About Dr. Dena Z Olwan

Dr. Dena Z Olwan is a psychologist based in Sioux City, Iowa who is specialized in Clinical Psychology. Active license number of Dr. Dena Z Olwan is 00703 for General Psychology in Iowa. Her current practice location is 401 Douglas Street, Suite 504, Sioux City. Patients can contact her at 712-258-1000 or can fax her at 712-252-1100. Dr. Dena Z Olwan, PHD, specializes in Clinical Psychology and her NPI number (Unique professional ID assigned by NPPES) is 1588648596.

Dr. Dena Z Olwan is a mental health professional with highly specialized training in the diagnosis and psychological treatment of mental, behavioral and emotional illnesses, including obsessive-compulsive disorder (OCD). Her main focus is on diagnosing and treating mental, emotional, and behavioral disorders. Some of the common disorders that she can treat are learning disabilities, substance abuse, depression, anxiety, and eating disorders.

Practice Information

Dr. Dena Z Olwan's specialty, credentials, practice address, contact phone number and fax are as below. Patients can call on the below given phone number for appointment.

Provider Name Dr. Dena Z Olwan
Specialization Clinical Psychology
Credentials PHD
Gender Female
Practice Address: 401 Douglas Street, Suite 504
Sioux City, IA - 51104-1471
Fax 712-252-1100

Professional Identification Codes

NPI number stands for National Provider Identifier which is a unique 10-digit identification number issued to healthcare providers in the United States by the Centers for Medicare and Medicaid Services (CMS). NPI details are as mentioned below.

NPI Number1588648596
NPI Enumeration Date: 02 Dec, 2005
NPI Last Update On: 01 Aug, 2021

Medical Licenses:

Healthcare professionals can hold one or more medical licenses for different specialties in the same state or different states. Related medical licenses for Dr. Dena Z Olwan are as mentioned below.

License NumberSpecializationStateStatus
00703General Psychology IowaPrimary
00703Clinical Psychology IowaSecondary

Other Medical Identifiers

Other professional identifiers associated with Dr. Dena Z Olwan such as Medicaid, Medicare PIN, NSC, UPIN etc. are mentioned as below.
IdentifierTypeStateIssuer
2157180MedicaidIowa

Mailing Address

Business mailing address can be used for mailing purpose only, for visiting purpose patients need to refer above mentioned Practice address.

Dr. Dena Z Olwan
401 Douglas St Ste 504,
Sioux City, IA - 51101-1471
Phone: 712-258-1000
Fax: 712-252-1100

Book an Appointment with Dr. Dena Z Olwan

To schedule an appointment, contact Dr. Dena Z Olwan at 401 Douglas Street, Suite 504, Sioux City, Iowa or call the phone number listed below.

Book an Appointment

Frequently Asked Questions

Below are some commonly asked questions about Dr. Dena Z Olwan:

Dr. Dena Z Olwan is a psychologist specializing in General Psychology. She is specialized in psychological testing and evaluating or assessing patient's personal characteristics, such as intelligence, personality, abilities, interests, aptitudes, and neuropsychological functioning. Accordingly, she performs counseling, psychoanalysis, psychotherapy, hypnosis, biofeedback, and behavior analysis and therapy. She can diagnose and treat mental and emotional disorder or disability, alcoholism and substance abuse, disorders of habit or conduct, as well as of the psychological aspects of physical illness, accident, injury, or disability by psycheducational evaluation, therapy, remediation, and consultation.

Yes, Dr. Dena Z Olwan is currently accepting new patients. To schedule an appointment, contact the office directly and schedule an appointment.
*Availability may change. Please contact the office directly to ask about appointments.

Dr. Dena Z Olwan practices at 401 Douglas Street, Suite 504, Sioux City, Iowa, 51104-1471.

To schedule an appointment with Dr. Dena Z Olwan, please contact the office at 712-258-1000.

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**Data of this site is collected from Medicare & Medicaid Services (CMS) and NPPES. Last updated on 14 September, 2026.