Sean Timothy Massa, MD
Otolaryngology Physician · Saint Louis, MO
Sean Timothy Massa, MD is an otolaryngology physician with a practice address in Saint Louis, Missouri, and NPI 1336586809, issued on May 23, 2013. Check the license (Missouri 2018008049, as entered in NPPES) on the Missouri Board of Registration for the Healing Arts; the Medicare figures below come from public CMS files.
- Name
- Sean Timothy Massa
- Credential
- MD
- Primary taxonomy
- Otolaryngology Physician 207Y00000X
- License number
- 2018008049 MO
Self-reported in NPPES; status is on the state search - Practice location
- 1225 S Grand, Saint Louis, MO 63104
- Phone
- (314) 977-5110
- Enumerated
- May 23, 2013
- Record last updated
- Mar 5, 2021 (not updated in 5 years: call before relying on the address or phone)
- Fax
- (314) 977-7686
- Medicare enrollment
- Enrolled (PECOS I20180809004834); accepts Medicare assignment
- Entity
- Type 1 · individual
8 nearest otolaryngology physician records → All 253 in Missouri → Look up another NPI →
Verify Sean Timothy Massa in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMissouri Board of Registration for the Healing Arts
Search for license 2018008049Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
81% fewer Medicare Part D claims than the average otolaryngology physician in 2024
103 Medicare Part D claims for 33 beneficiaries, against an average of 541 among the 8,339 providers of this specialty who prescribed in Part D. 18 claims were for opioids.
Most prescribed
- Pantoprazole Sodium12 claims
- Lidocaine Hcl Viscous11 claims
- Oxycodone Hcl11 claims
Source: CMS Medicare Part D Prescribers by Provider and Drug, 2024 (data.cms.gov). Part D covers prescriptions for Medicare patients only; drugs with fewer than 11 claims are not published.
The practice group's MIPS final score for 2023 (Medicare payment program): 81.6 of 100
The Merit-based Incentive Payment System score is reported for the practice group, not for one clinician alone. Four categories are weighted into the final score; the average among 454,083 clinicians with a measured score was 83.5.
Source: CMS Quality Payment Program, MIPS performance year 2023, group reporting; category weights for 2023 (qpp.cms.gov).
Industry payments in 2024: $81.13
3 payments; by number, the most common kind was food and beverage; the largest payer was Intuitive Surgical, Inc. The 6,429 providers of this specialty with any payment received $1,922.50 on average. Payments are reported by manufacturers, not by the provider, and are not a sign of wrongdoing.
Source: CMS Open Payments, program year 2024 (openpaymentsdata.cms.gov); average among providers of this specialty with at least one payment.
Bills Medicare through one group practice
- Ssm Health Care GroupSaint Louis, MO
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Sean Timothy Massa among 253 otolaryngology physician records in Missouri
Sean Timothy Massa, MD is one of 253 otolaryngology physician records with a practice address in Missouri. 77% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2013, is newer than 61% of them.
- NPI issued2013 · 61% of these records are older, 34% newer
- In a Medicare fileYes · 77% of these records are
- In the CMS Doctors and Clinicians fileYes · 58% of these records are
- Graduated2013 · median 2007 among the 148 with a school on file
- Record last updated2021 · 48% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 207Y00000X and a Missouri practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
Otolaryngology Physician providers in Missouri
There are 253 otolaryngology physician records in Missouri.
All 253 in Missouri → Every provider in Saint Louis → Otolaryngology Physician nationwide →
The 8 otolaryngology physician records with the nearest ZIP codes
- Jastin Antisdel, MDSaint Louis, MO 631041073714564
- Joseph Brunworth, M.D.St Louis, MO 631041366694135
- Collin Chen, M.D.St Louis, MO 631041194139113
- John Eisenbeis, MDSt Louis, MO 631041659398246
- Joshua Hentzelman, M.D.Saint Louis, MO 631041588865091
- Henry Ideker, MDSt Louis, MO 631041063973972
- Christopher Rayle, MDSaint Louis, MO 631041568993509
- Thomas Sanford, MDSt Louis, MO 631041568489151
Common questions
What is Sean Timothy Massa, MD's NPI number?
Sean Timothy Massa, MD's National Provider Identifier (NPI) is 1336586809, issued on May 23, 2013. An NPI identifies a provider in billing; it is not a license.
Where is Sean Timothy Massa, MD located?
The NPPES record lists a practice address at 1225 S Grand, Saint Louis, MO, 63104. Phone: (314) 977-5110. Providers update this record themselves, so call before visiting.
How can I verify Sean Timothy Massa, MD's license?
NPPES lists Missouri license number 2018008049, as entered by the provider. Search the Missouri Board of Registration for the Healing Arts at https://www.fsmb.org/contact-a-state-medical-board/. The NPPES record confirms identity only; the state search shows license status, expiration and public orders.
How much does Sean Timothy Massa, MD prescribe under Medicare Part D?
In 2024, Sean Timothy Massa, MD had 103 Medicare Part D claims for 33 beneficiaries; the average among otolaryngology physician prescribers was 541. Part D covers Medicare prescriptions only.
What is Sean Timothy Massa, MD's MIPS final score?
The 2023 MIPS final score is 81.6 of 100, reported for the practice group. The average among 454,083 clinicians with a measured score was 83.5.
Source: CMS National Plan and Provider Enumeration System (NPPES), file of Aug 9, 2026 (NPPES files on CMS.gov); NUCC Health Care Provider Taxonomy. Medicare files from data.cms.gov. An NPI identifies who bills; it is not a license.
Figures on PlainDoctor are read from the federal files each page names (CMS NPPES, Medicare Part D, MIPS, Open Payments; the HHS-OIG exclusion list only as counts) and from Census population estimates, with the file date shown beside them. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error. Data current as of Aug 9, 2026.