Provider records sourced from NPPES (CMS National Plan & Provider Enumeration System). Data current as of August 10, 2026.
NPIDirectory

Dr. Warren Ross Loos, PHD

Individual provider Clinical Psychologist · NPI 1548360167

Dr. Warren Ross Loos, PHD is a Clinical Psychologist in Honolulu, Hawaii. Qualified in 1988, 38 years ago. Practices as a sole proprietor, accepts Medicare assignment and offers telehealth. Licensed in Hawaii.

Years since qualifying
38
Licensed in
HI
In the registry since
2006
What do these letters mean?
PHD — Doctor of Philosophy
A research doctorate. In healthcare it usually sits alongside a clinical licence.

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Practice location Address checks out

4300 Waialae Ave Apt B1002
Honolulu, HI 96816-5757
Phone: (808) 284-2200
Fax: (888) 668-8527
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Pin is approximate — placed at the ZIP-code centre, not the exact door.

Specialties & licences

Clinical Psychologist (primary) Taxonomy 103TC0700X · Licence PSY-792 (HI)

Record details

NPI number1548360167
Entity typeIndividual (Type 1)
GenderMale
Credentials PHD
Sole proprietorYes
NPI enumeratedSeptember 24, 2006
Last updated in NPPESJuly 26, 2022
Certification dateJuly 26, 2022
Mailing address4348 Waialae Ave # 403, Honolulu, HI 96816-5767

Medicare enrollment

From the CMS Doctors & Clinicians file — this clinician is enrolled in Medicare.

Medicare specialtyCLINICAL PSYCHOLOGIST
Medical schoolOTHER
Graduated 1988 (38 years in practice)
Accepts Medicare assignment Yes — accepts the Medicare-approved amount
TelehealthOffers telehealth services

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