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

William Efehi Osai

Individual provider Family Nurse Practitioner · NPI 1366474769

William Efehi Osai is a Nurse Practitioner in Houston, Texas. Graduated from Vanderbilt University School of Medicine in 1999, 27 years ago. Practices with Trumen Physician and Associates Post Acute PLLC, a 121-clinician group and accepts Medicare assignment. Licensed in Texas.

Years since qualifying
27
Trained at
Vanderbilt University School of Medicine
Licensed in
TX
In the registry since
2006
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Practice location Address checks out

8313 SW Fwy Ste 105
Houston, TX 77074-1611 Not confirmed with CMS for 13 years — call before visiting
Phone: (713) 773-1102
Fax: (832) 369-7355
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Pin is approximate — placed at the ZIP-code centre, not the exact door.

Specialties & licences

Family Nurse Practitioner (primary) Taxonomy 363LF0000X · Licence 600763 (TX)

Record details

NPI number1366474769
Entity typeIndividual (Type 1)
GenderMale
Sole proprietorNo
NPI enumeratedJuly 7, 2006
Last updated in NPPESAugust 21, 2013

Medicare enrollment

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

Medicare specialtyNURSE PRACTITIONER
Medical schoolVANDERBILT UNIVERSITY SCHOOL OF MEDICINE
Graduated 1999 (27 years in practice)
Group practice Trumen Physician And Associates Post Acute Pllc — 121 clinicians
Accepts Medicare assignment Yes — accepts the Medicare-approved amount
Practice locations2 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 patients239
Services billed 1,209 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.

Colleagues at Trumen Physician and Associates Post Acute PLLC

Clinicians the CMS Doctors & Clinicians file lists under the same group practice. CMS counts 121 clinicians in the practice; 12 are shown here.

Other providers in Houston