Provider Profile
Jillian N. Marsilio, PA-C
Unclaimed ProfileAbout Jillian Marsilio
Jillian N. Marsilio, PA-C is a physician assistant based in Ronkonkoma, NY. According to Medicare claims data, Jillian cared for 592 Medicare patients across 4,396 services. The services billed most often include subsequent nursing facility care with straightforward level of medical decision making, per day, if using time, 20 minutes or more, subsequent nursing facility care with moderate level of medical decision making, per day, if using time, at least 30 minutes, and nursing facility discharge management, more than 30 minutes.
Summarised automatically from public NPI registry and CMS Medicare data. Not written or reviewed by this provider. Claim this profile to replace it — free, and no identity document with a practice or institutional email.
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
- (631) 676-7656
- Email not available
Practice Locations
3505 VETERANS MEMORIAL HWY STE C
Ronkonkoma, NY 11779
Procedures Most Often Billed to Medicare
4,396 services · 592 patients · 3 distinct codes
| Procedure | Type | Code | Services | Compared with peers |
|---|---|---|---|---|
| Subsequent nursing facility care with straightforward level of medical decision making, per day, if using time, 20 minutes or more | Office visit | 99308 |
3,368 | More than most peers in Physician Assistant |
| Subsequent nursing facility care with moderate level of medical decision making, per day, if using time, at least 30 minutes | Office visit | 99309 |
872 | More often than most peers in Physician Assistant |
| Nursing facility discharge management, more than 30 minutes | Office visit | 99316 |
156 | More 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 3
Same specialty, same street address — most likely the same department or group.
Related specialists at this location 8
Clinically related specialties at the same address — the people this provider most likely works alongside.
Also at this address 3
Providers at the same street address. Each files their own registry entry, so a shared practice often appears under several different names.
More connections — 22 related providers in 3 groups
Other physician assistants in Ronkonkoma 6
Same specialty, same city.
Trained at Other 8
Other providers in the same specialty who trained at the same institution.
Class of 2018 at Other 8
Providers who graduated from the same medical school in the same year.
Common questions
What does Jillian N. Marsilio specialize in?
Jillian N. Marsilio is a physician assistant in Ronkonkoma, NY. That is the designation recorded for this NPI in the federal registry.
NPI registry
Where is Jillian N. Marsilio located?
Jillian N. Marsilio is listed at 3505 Veterans Memorial Hwy Ste C, Ronkonkoma, NY 11779. Addresses come from the NPI registry and can lag a move, so confirm before travelling.
NPI registry
What is Jillian N. Marsilio's phone number?
The number on file is (631) 676-7656. Guide.md cannot book appointments or pass on messages — please call the office directly.
NPI registry
What is Jillian N. Marsilio's NPI number?
Jillian N. Marsilio's National Provider Identifier is 1598229742. 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 Jillian N. Marsilio train?
Jillian N. Marsilio attended Other, graduating in 2018. This comes from the CMS National Downloadable File.
CMS public data
How long has Jillian N. Marsilio been practicing?
Jillian N. Marsilio has 8 years experience. Calculated from a graduation year of 2018, reported in the CMS National Downloadable File.
CMS public data
What does Jillian N. Marsilio do most often?
According to Medicare billing data, Jillian N. Marsilio 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 Jillian N. Marsilio confirmed this information?
Not yet. This profile is built from public federal data and has not been confirmed by Jillian N. Marsilio. 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.