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

Dr. Sean Timothy Massa, MD

Individual provider Otolaryngology Physician · NPI 1336586809

Dr. Sean Timothy Massa, MD is an Otolaryngology in Saint Louis, Missouri. Qualified in 2013, 13 years ago. Practices with SSM Health Care Group, a 923-clinician group and accepts Medicare assignment. Licensed in Missouri.

Years since qualifying
13
Licensed in
MO
In the registry since
2013
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

1225 S Grand Door 3
Saint Louis, MO 63104
Phone: (314) 977-5110
Fax: (314) 977-7686
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Pin is approximate — placed at the ZIP-code centre, not the exact door.

Specialties & licences

Otolaryngology Physician (primary) Taxonomy 207Y00000X · Licence 2018008049 (MO)

Record details

NPI number1336586809
Entity typeIndividual (Type 1)
GenderMale
Credentials MD
Sole proprietorNo
NPI enumeratedMay 23, 2013
Last updated in NPPESMarch 5, 2021
Certification dateFebruary 17, 2021

Medicare enrollment

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

Medicare specialtyOTOLARYNGOLOGY
Medical schoolOTHER
Graduated 2013 (13 years in practice)
Group practice Ssm Health Care Group — 923 clinicians
Accepts Medicare assignment Yes — accepts the Medicare-approved amount
Practice locations3 on file with Medicare

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