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

Dr. Diego Sebastian Humphrey, MD

Individual provider Cardiovascular Disease Physician · NPI 1073525515

Dr. Diego Sebastian Humphrey, MD is a Cardiovascular Disease (Cardiology) in Tahlequah, Oklahoma. Qualified in 1984, 42 years ago. Practices with Cherokee Nation, a 448-clinician group, works from 2 locations and accepts Medicare assignment. Licensed in Oklahoma.

Years since qualifying
42
Licensed in
OK
In the registry since
2006
What do these letters mean?
MD — Doctor of Medicine
A physician who completed allopathic medical school.

See every abbreviation used in this directory →

Practice location Address checks out

1500 E Downing #
Tahlequah, OK 74464
Phone: (918) 207-0882
Fax: (918) 207-0335
Show map & directions

Pin is approximate — placed at the ZIP-code centre, not the exact door.

Additional practice locations (1)

  • 300 Rockefeller Dr, Muskogee, OK 74401-5075 — (918) 682-5501

Specialties & licences

Cardiovascular Disease Physician (primary) Taxonomy 207RC0000X · Licence 19979 (OK)

Record details

NPI number1073525515
Entity typeIndividual (Type 1)
GenderMale
Credentials MD
Sole proprietorNo
NPI enumeratedAugust 13, 2006
Last updated in NPPESApril 8, 2020
Certification dateApril 8, 2020

Medicare enrollment

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

Medicare specialtyCARDIOVASCULAR DISEASE (CARDIOLOGY)
Also practisesINTERNAL MEDICINE
Medical schoolOTHER
Graduated 1984 (42 years in practice)
Group practice Cherokee Nation — 448 clinicians
Accepts Medicare assignment Yes — accepts the Medicare-approved amount
Practice locations4 on file with Medicare