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

Kay Thi Oo, MD

Individual provider Hospitalist Physician · NPI 1184110538

Kay Thi Oo, MD is an Internal Medicine in Springfield, Massachusetts. Qualified in 2012, 14 years ago. Practices with Southern California Permanente Medical Group, an 11,242-clinician group and accepts Medicare assignment. Licensed in Massachusetts.

Years since qualifying
14
Licensed in
MA
In the registry since
2018
Specialties on file
2
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

759 Chestnut St
Springfield, MA 01107-1619
Phone: (413) 794-6297
Fax: (413) 794-1767
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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 287430 (MA)
Hospitalist Physician Taxonomy 208M00000X · Licence 287430 (MA)

Record details

NPI number1184110538
Entity typeIndividual (Type 1)
GenderFemale
Credentials MD
Sole proprietorNo
NPI enumeratedJuly 9, 2018
Last updated in NPPESMay 27, 2025
Certification dateAugust 13, 2021
Mailing address280 Chestnut St, 2nd Floor, Springfield, MA 01199-1001

Medicare enrollment

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

Medicare specialtyINTERNAL MEDICINE
Medical schoolOTHER
Graduated 2012 (14 years in practice)
Group practice Southern California Permanente Medical Group — 11242 clinicians
Accepts Medicare assignment Yes — accepts the Medicare-approved amount
Practice locations2 on file with Medicare

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