Provider records sourced from NPPES (CMS National Plan & Provider Enumeration System). Data current as of October 4, 2026.
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Dr. Michael Ross Tangum, MD

Individual provider Internal Medicine Physician · NPI 1497729321

Dr. Michael Ross Tangum, MD practises Internal Medicine in Portland, Oregon. Graduated from University of Texas Medical Branch at Galveston in 1996, 30 years ago. Practices with Legacy Clinics LLC, a 718-clinician group and accepts Medicare assignment. Licensed in Oregon.

Years since qualifying
30
Trained at
University of Texas Medical Branch at Galveston
Licensed in
OR
In the registry since
2006
What do these letters mean?
MD — Doctor of Medicine
A physician who completed allopathic medical school.

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Practice location Address checks out

1015 NW 22nd Ave
Portland, OR 97210-3025 Not confirmed with CMS for 15 years — call before visiting
Phone: (503) 413-7711
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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 MD21239 (OR)

Record details

NPI number1497729321
Entity typeIndividual (Type 1)
GenderMale
Credentials MD
Sole proprietorNo
NPI enumeratedFebruary 15, 2006
Last updated in NPPESSeptember 6, 2011

Medicare enrollment

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

Medicare specialtyINTERNAL MEDICINE
Medical schoolUNIVERSITY OF TEXAS MEDICAL BRANCH AT GALVESTON
Graduated 1996 (30 years in practice)
Group practice Legacy Clinics Llc — 718 clinicians
Accepts Medicare assignment Yes — accepts the Medicare-approved amount
Practice locations4 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 patients87
Services billed 266 a service is one billed item, such as a visit, a test or a procedure
Average patient age70

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 Legacy Clinics LLC

Clinicians the CMS Doctors & Clinicians file lists under the same group practice. CMS counts 718 clinicians in the practice; 12 are shown here.

Other providers in Portland