Provider records sourced from NPPES (CMS National Plan & Provider Enumeration System). Data current as of October 4, 2026.
NPIDirectory

Josef Lassan

Individual provider Hospitalist Physician · NPI 1912326596

Josef Lassan is a Hospitalist in Honolulu, Hawaii. Qualified in 2014, 12 years ago. Practices with Queens University Medical Group, a 623-clinician group and accepts Medicare assignment. Licensed in Hawaii and North Carolina.

Years since qualifying
12
Licensed in
HI, NC
In the registry since
2014
Specialties on file
2
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Practice location Address checks out

1301 Punchbowl St
Honolulu, HI 96813-2499
Phone: (808) 691-1000
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Pin is approximate — placed at the ZIP-code centre, not the exact door.

Specialties & licences

Internal Medicine Physician (primary) Taxonomy 207R00000X · Licence MD20515 (HI)
Hospitalist Physician Taxonomy 208M00000X · Licence 2018-02621 (NC)

Record details

NPI number1912326596
Entity typeIndividual (Type 1)
GenderMale
Sole proprietorNo
NPI enumeratedApril 10, 2014
Last updated in NPPESJune 16, 2021
Certification dateJune 16, 2021

Medicare enrollment

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

Medicare specialtyHOSPITALIST
Also practisesINFECTIOUS DISEASE, INTERNAL MEDICINE
Medical schoolOTHER
Graduated 2014 (12 years in practice)
Group practice Queens University Medical Group — 623 clinicians
Accepts Medicare assignment Yes — accepts the Medicare-approved amount
Practice locations3 on file with Medicare

Medicare patients and services, 2024

From the CMS Medicare Physician & Other Practitioners file for calendar year 2024. It counts Original Medicare patients only, so a practice that mostly sees Medicare Advantage or privately insured patients looks smaller here than it is.

Medicare patients160
Services billed 183 a service is one billed item, such as a visit, a test or a procedure
Average patient age77

Dollar amounts are not shown. What Medicare pays a practice is gross billings, before staff, premises and tax and including the cost of any drugs it administers, so it is not what a clinician earns.

Practises at

Facilities the CMS Facility Affiliation file lists for this clinician.

Colleagues at Queens University Medical Group

Clinicians the CMS Doctors & Clinicians file lists under the same group practice. CMS counts 623 clinicians in the practice; 12 are shown here.

Other providers in Honolulu