Sean Timothy Massa, MD
NPI 1336586809ActiveIndividual· Otolaryngology· Saint Louis, MO
Otolaryngology (MD) with Ssm Health Care Group, practicing in Saint Louis, Missouri. 138 Medicare patients in 2024, $67,219 paid; nearly all of their 103 Part D prescriptions were generic (97%). Stryker Corporation reported $16.62 in payments in 2025, mostly food and beverage. Lists Ssm Health Depaul Hospital St Louis and 2 other hospitals as hospital affiliations.
Overview
| NPI | 1336586809 |
|---|---|
| Status | Active |
| Entity type | Individual |
| Credential | MD |
| Sole proprietor | No |
| NPI issued | May 23, 2013 |
| Last updated in NPPES | Mar 5, 2021 |
| Certified by provider | Feb 17, 2021 |
Specialties and licenses
| Taxonomy | Code | License | State |
|---|---|---|---|
| Otolaryngology Primary | 207Y00000X | 2018008049 | MO |
Exclusion screening
| List | Result | Details |
|---|---|---|
| HHS-OIG LEIE · Nov 10, 2026 | No match | Checked by NPI and by name + state |
| North Carolina Medicaid · Nov 11, 2026 | No match | — |
| New York OMIG · Nov 11, 2026 | No match | — |
| Ohio Medicaid · Nov 11, 2026 | No match | — |
| Pennsylvania Medicheck · Nov 11, 2026 | No match | — |
| Washington HCA · Nov 11, 2026 | No match | — |
Official OIG search · How matching works ·Bulk check a roster
Medicare
| Enrollment (PECOS) | Enrolled Practitioner - Otolaryngology (MO) |
|---|---|
| Accepts assignment | Yes (participating) |
Medicare services in 2024
| Medicare patients | 138 |
|---|---|
| Services billed | 414 across 103 procedure codes |
| Paid by Medicare | $67,219 |
Part D prescriptions in 2024
| Prescriptions (claims) | 103 · 130 30-day fills |
|---|---|
| Patients | 33 |
| Total drug cost | $1,355 |
| Generic share | 97% of claims |
Education and affiliations
| Graduation year | 2013 |
|---|---|
| Medicare specialty | Otolaryngology |
Medical group
- Ssm Health Care GroupSaint Louis, MO · 940 clinicians
Hospital affiliations
- Ssm Health Depaul Hospital St LouisBridgeton, MO
- Ssm Health Saint Louis University HospitalSaint Louis, MO
- Ssm St Joseph Health CenterSaint Charles, MO
Industry payments (Open Payments)
- 2025$16.62 · 1 payment from 1 company
- 2024$81.13 · 3 payments from 3 companies
Top paying companies in 2025
| Company | Amount | Payments |
|---|---|---|
| Stryker Corporation | $16.62 | 1 |
What the 2025 payments were for
- Food and Beverage$16.62 · 1 payment
Receiving payments does not imply wrongdoing. What Open Payments covers ·original records
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All 93 otolaryngologists in Saint Louis · All otolaryngologists in Missouri