Provider Profile
Gianna I. Masi
Unclaimed ProfileAbout Gianna Masi
Gianna I. Masi is a physician assistant practicing in Bay Shore, NY. Medicare claims data shows Gianna provided 29 services to 26 patients. The services billed most often include subsequent hospital care with straightforward or low level of medical decision making, per day, if using time, at least 25 minutes and initial hospital care with straightforward or low level of medical decision making, per day, if using time, at least 40 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) 968-3000
- Email not available
Practice Locations
301 E MAIN ST
Bay Shore, NY 11706
18 Lawrence St
Greenlawn, NY 11740
Procedures Most Often Billed to Medicare
29 services · 26 patients · 2 distinct codes
| Procedure | Type | Code | Services | Compared with peers |
|---|---|---|---|---|
| Subsequent hospital care with straightforward or low level of medical decision making, per day, if using time, at least 25 minutes | Office visit | 99231 |
15 | Less often than most peers in Physician Assistant |
| Initial hospital care with straightforward or low level of medical decision making, per day, if using time, at least 40 minutes | Office visit | 99221 |
14 | 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 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 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 — 21 related providers in 3 groups
Other physician assistants in Bay Shore 5
Same specialty, same city.
Trained at Other 8
Other providers in the same specialty who trained at the same institution.
Class of 2023 at Other 8
Providers who graduated from the same medical school in the same year.
Common questions
What does Gianna I. Masi specialize in?
Gianna I. Masi is a physician assistant in Bay Shore, NY. That is the designation recorded for this NPI in the federal registry.
NPI registry
Where is Gianna I. Masi located?
Gianna I. Masi is listed at 301 E Main St, Bay Shore, NY 11706. Addresses come from the NPI registry and can lag a move, so confirm before travelling.
NPI registry
What is Gianna I. Masi's phone number?
The number on file is (631) 968-3000. Guide.md cannot book appointments or pass on messages — please call the office directly.
NPI registry
What is the NPI for Gianna I. Masi?
Gianna I. Masi's National Provider Identifier is 1750062493. 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 Gianna I. Masi train?
Gianna I. Masi attended Other, graduating in 2023. This comes from the CMS National Downloadable File.
CMS public data
How much experience does Gianna I. Masi have?
Gianna I. Masi has 3 years experience. Calculated from a graduation year of 2023, reported in the CMS National Downloadable File.
CMS public data
What does Gianna I. Masi do most often?
According to Medicare billing data, Gianna I. Masi 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
Is Gianna I. Masi's profile verified?
Not yet. This profile is built from public federal data and has not been confirmed by Gianna I. Masi. 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.