Provider Profile
Sean C. Osullivan, PHYSICIAN ASSISTANT
Unclaimed ProfileAbout Sean Osullivan
Sean C. Osullivan, PHYSICIAN ASSISTANT is a physician assistant practicing in Brewster, NY. According to Medicare claims data, Sean cared for 450 Medicare patients across 475 services. The services billed most often include established patient office or other outpatient visit with low level od decision making, if using time, 20 minutes or more, respiratory infectious agent detection by rna for severe acute respiratory syndrome coronavirus 2 (covid 19), influenza a, influenza b, and respiratory syncytial virus, upper respiratory specimen, each reported as detected or not detected, and established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more.
Summarised automatically from public NPI registry and CMS Medicare data. Not written or reviewed by this provider. Claim this profile to replace it.
Education & Training
Specialty
Credentials & Licensing
License numbers are what the provider reported to NPPES when the NPI was issued or updated. NPPES does not verify licensure; confirm current standing with the state licensing board.
Medicare information
Exactly as CMS reports it (National Downloadable File, Opt-Out Affidavits, Order & Referring). Not an insurance directory; confirm coverage with the office.
Contact Information
- (845) 592-4915
- Email not available
Practice Locations
111 CLOCK TOWER CMNS NORTHERN MEDICAL GROUP, PLLC
Brewster, NY 10509
Procedures Most Often Billed to Medicare
475 services · 450 patients · 10 distinct codes
| Procedure | Type | Code | Services | Compared with peers |
|---|---|---|---|---|
| Respiratory infectious agent detection by rna for severe acute respiratory syndrome coronavirus 2 (covid 19), influenza a, influenza b, and respiratory syncytial virus, upper respiratory specimen, each reported as detected or not detected | 0241U |
62 | More than most peers in Physician Assistant | |
| Established patient office or other outpatient visit with low level od decision making, if using time, 20 minutes or more | Office visit | 99213 |
206 | More often than most peers in Physician Assistant |
| Established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more | Office visit | 99214 |
54 | As often as other peers in Physician Assistant |
| Urinalysis, manual test | Lab test | 81002 |
41 | More often than most peers in Physician Assistant |
| Detection test by immunoassay with direct visual observation for influenza virus | Lab test | 87804 |
30 | As often as other peers in Physician Assistant |
| New patient office or other outpatient visit with low level of medical decision making, if using time, 30 minutes or more | Office visit | 99203 |
27 | As often as other peers in Physician Assistant |
| Established patient office or other outpatient visit with high level of medical decision making, if using time, 40 minutes or more | Office visit | 99215 |
19 | Less often than most peers in Physician Assistant |
| Detection test by immunoassay with direct visual observation for severe acute respiratory syndrome coronavirus 2 (covid-19) | Lab test | 87811 |
13 | Less often than most peers in Physician Assistant |
| Detection test by nucleic acid for strep (streptococcus, group a), amplified probe technique | Lab test | 87651 |
12 | Less often than most peers in Physician Assistant |
| Detection test by immunoassay with direct visual observation for respiratory syncytial virus | Lab test | 87807 |
11 | Less often than most peers in Physician Assistant |
Source: CMS Medicare public data. Shows how often procedures were billed — not quality of care or patient satisfaction.
Related providers
Connections drawn from the registry and from what providers have told us. A link here is not a referral or an endorsement.
Other physician assistants at this location 1
Same specialty, same street address — most likely the same department or group.
Related specialists at this location 7
Clinically related specialties at the same address — the people this provider most likely works alongside.
Also at this address 4
Providers at the same street address. Each files their own registry entry, so a shared practice often appears under several different names.
More connections — 19 related providers in 3 groups
Other physician assistants in Brewster 3
Same specialty, same city.
Trained at Other 8
Other providers in the same specialty who trained at the same institution.
Class of 2003 at Other 8
Providers who graduated from the same medical school in the same year.
Common questions
What does Sean C. Osullivan specialize in?
Sean C. Osullivan is a physician assistant in Brewster, NY. That is the designation recorded for this NPI in the federal registry.
NPI registry
Where is Sean C. Osullivan located?
Sean C. Osullivan is listed at 111 Clock Tower Cmns Northern Medical Group, Pllc, Brewster, NY 10509. Addresses come from the NPI registry and can lag a move, so confirm before travelling.
NPI registry
What is Sean C. Osullivan's phone number?
The number on file is (845) 592-4915. Guide.md cannot book appointments or pass on messages — please call the office directly.
NPI registry
What is Sean C. Osullivan's NPI number?
Sean C. Osullivan's National Provider Identifier is 1437103090. It is issued by the Centers for Medicare & Medicaid Services and is unique and permanent — it does not change if they move practice.
NPI registry
Where did Sean C. Osullivan train?
Sean C. Osullivan attended Other, graduating in 2003. This comes from the CMS National Downloadable File.
CMS public data
How long has Sean C. Osullivan been practicing?
Sean C. Osullivan has 23 years experience. Calculated from a graduation year of 2003, reported in the CMS National Downloadable File.
CMS public data
What does Sean C. Osullivan do most often?
According to Medicare billing data, Sean C. Osullivan the Medicare record under this individual NPI shows mainly office visits and diagnostic testing. Hospital-based physicians usually have their procedural work billed by the facility rather than under their own number, so this is a floor on their practice, not a description of it. This reflects Medicare patients only and is billing volume, not a measure of quality.
Medicare claims
Has Sean C. Osullivan confirmed this information?
Not yet. This profile is built from public federal data and has not been confirmed by Sean C. Osullivan. If this is you, claiming it is free.
Guide.md
Provider data sourced from the NPPES NPI Registry and CMS public datasets. Information is provided for reference and is not medical advice.