Marc St Cyr, MD
Emergency Medicine Physician · Paoli, PA
Marc St Cyr, MD is an emergency medicine physician with a practice address in Paoli, Pennsylvania, and NPI 1356907414, issued on May 14, 2019. Check the license (Pennsylvania MD485187, as entered in NPPES) on the Pennsylvania Department of State (PALS); the Medicare figures below come from public CMS files.
- Name
- Marc St Cyr
- Credential
- MD
- Primary taxonomy
- Emergency Medicine Physician 207P00000X
- License number
- MD485187 PA
Self-reported in NPPES; status is on the state search - Practice location
- 255 W Lancaster Ave, Paoli, PA 19301
- Phone
- (484) 565-1000
- Enumerated
- May 14, 2019
- Record last updated
- Nov 10, 2025
- Medicare enrollment
- Enrolled (PECOS I20250516001140); accepts Medicare assignment
- Medical or professional school
- University Of Texas Medical School At Houston, 2020
- Entity
- Type 1 · individual
8 nearest emergency medicine physician records → All 3,911 in Pennsylvania → Look up another NPI →
Also registered at 255 W Lancaster Ave
A shared address usually means a shared clinic or building; it does not show who employs whom.
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Verify Marc St Cyr in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersPennsylvania Department of State (PALS)
Search for license MD485187Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
87% fewer Medicare Part D claims than the average emergency medicine physician in 2024
29 Medicare Part D claims for 22 beneficiaries, against an average of 226 among the 54,106 providers of this specialty who prescribed in Part D.
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.
Bills Medicare through one group practice
- Main Line Emergency Med Associates LLCPaoli, PA
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Marc St Cyr among 3,911 emergency medicine physician records in Pennsylvania
Marc St Cyr, MD is one of 3,911 emergency medicine physician records with a practice address in Pennsylvania. 82% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2019, is newer than 75% of them.
- NPI issued2019 · 75% of these records are older, 21% newer
- In a Medicare fileYes · 82% of these records are
- In the CMS Doctors and Clinicians fileYes · 57% of these records are
- Graduated2020 · median 2013 among the 2,231 with a school on file
- Record last updated2025 · 51% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 207P00000X and a Pennsylvania practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
13 emergency medicine physician records list a practice address in Paoli
They are 13 of the 902 NPPES records with a practice address in Paoli, and 3,911 emergency medicine physician records in Pennsylvania.
All 3,911 in Pennsylvania → Every provider in Paoli → Emergency Medicine Physician nationwide →
The 8 emergency medicine physician records with the nearest ZIP codes
- Brittany Beck, PA-CPaoli, PA 193011407331838
- Stuart Brilliant, MDPaoli, PA 193011295708667
- Mitchell Drake, MDPaoli, PA 193011578535522
- Steven Gamburg, MDPaoli, PA 193011063485407
- Duane Godshall, MDPaoli, PA 193011134192586
- Andrea Horvath, DOPaoli, PA 193011164495420
- Laurel Krouse, MDPaoli, PA 193011851364160
- David Nathan, MDPaoli, PA 193011891748141
Common questions
What is Marc St Cyr, MD's NPI number?
Marc St Cyr, MD's National Provider Identifier (NPI) is 1356907414, issued on May 14, 2019. An NPI identifies a provider in billing; it is not a license.
Where is Marc St Cyr, MD located?
The NPPES record lists a practice address at 255 W Lancaster Ave, Paoli, PA, 19301. Phone: (484) 565-1000. Providers update this record themselves, so call before visiting.
How can I verify Marc St Cyr, MD's license?
NPPES lists Pennsylvania license number MD485187, as entered by the provider. Search the Pennsylvania Department of State (PALS) at https://www.pals.pa.gov/. The NPPES record confirms identity only; the state search shows license status, expiration and public orders.
How much does Marc St Cyr, MD prescribe under Medicare Part D?
In 2024, Marc St Cyr, MD had 29 Medicare Part D claims for 22 beneficiaries; the average among emergency medicine physician prescribers was 226. Part D covers Medicare prescriptions only.
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.