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

Mason James Webb, MD, PHD

Individual provider Internal Medicine Physician · NPI 1306306600

Mason James Webb, MD, PHD is a Hematology/Oncology in Oklahoma City, Oklahoma. Qualified in 2019, 7 years ago. Practices with Mayo Clinic, a 4,796-clinician group, works from 2 locations, accepts Medicare assignment and offers telehealth. Licensed in Minnesota and Oklahoma.

Years since qualifying
7
Licensed in
MN, OK
In the registry since
2019
Specialties on file
3
What do these letters mean?
MD — Doctor of Medicine
A physician who completed allopathic medical school.
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

800 NE 10th St Ste B
Oklahoma City, OK 73104-5418
Phone: (572) 244-0111
Fax: (572) 244-9984
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Pin is approximate — placed at the ZIP-code centre, not the exact door.

Additional practice locations (1)

  • 200 1st St Sw, Rochester, MN 55905-0001 — (507) 284-2511

Specialties & licences

Hematology & Oncology Physician (primary) Taxonomy 207RH0003X · Licence 45945 (OK)
Internal Medicine Physician Taxonomy 207R00000X · Licence 67817 (MN)
Hematology & Oncology Physician Taxonomy 207RH0003X · Licence 67817 (MN)

Record details

NPI number1306306600
Entity typeIndividual (Type 1)
GenderMale
Credentials MD , PHD
Sole proprietorNo
NPI enumeratedMarch 22, 2019
Last updated in NPPESJuly 2, 2026
Certification dateJuly 2, 2026

Medicare enrollment

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

Medicare specialtyHEMATOLOGY/ONCOLOGY
Also practisesINTERNAL MEDICINE
Medical schoolOTHER
Graduated 2019 (7 years in practice)
Group practice Mayo Clinic — 4796 clinicians
Accepts Medicare assignment Yes — accepts the Medicare-approved amount
TelehealthOffers telehealth services
Practice locations3 on file with Medicare

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