MS. DIANE GRASSI NP
NPI 1063917136
Nurse Practitioner - Adult Health in Smithtown, NY

Active since March 29, 2018PECOS EnrolledAccepts Medicare Assignment
285 E MAIN ST, SMITHTOWN, NY 11787(631) 656-0874 Get Directions Write a Review

NPPES record last updated: January 7, 2019. Verified against the NPPES registry weekly; last sync: July 26, 2026.

Record update history: Jan 7, 2019, Mar 29, 2018 (2 updates tracked since 2018).

About Ms. Diane Grassi Np NPPES

Official registry information on file with the National Plan and Provider Enumeration System.

MS. DIANE GRASSI NP (NPI 1063917136) is an individual adult health provider in Smithtown, New York, licensed in New York (F308295-1) and active in the NPI registry since March 2018. She is enrolled in Medicare PECOS, is affiliated with North Shore University Hospital, and is a graduate of State University Of New York At Stony Brook, School Of Medicine (2016).

NPPES Registry Identity

NPI1063917136
Entity TypeIndividualFemale
Primary Taxonomy363LA2200X
Provider Legal NameMS. DIANE GRASSICredential: NP
Location Address285 E MAIN STSmithtown, NY 11787-2978
Mailing Address7 Wendy LnMassapequa Park, NY 11762-3733 · (516) 797-6670
Sole ProprietorYes
Medical School CMSState University Of New York At Stony Brook, School Of MedicineGraduated 2016
Enumeration DateMarch 29, 2018
Last NPPES UpdateJanuary 7, 20192 updates tracked since enumeration
NPI 1063917136 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses 2

Primary SpecialtyNurse Practitioner · Adult HealthPhysician Assistants & Advanced Practice Nursing Providers
Taxonomy Code363LA2200X
License Licensed in NY · F308295-1
Also ListedNurse Practitioner · GerontologyTaxonomy 363LG0600X · License F308295-1 (NY)
285 E MAIN ST, Smithtown, NY 11787

Medicare Participation & PECOS CMS

Medicare enrollment, assignment, and ordering and referring status from the CMS PECOS system.

Medicare Enrollment Status

Enrolled in Medicare and accepts Medicare assignment

Ms. Diane Grassi Np is registered in PECOS and agrees to accept the Medicare-approved amount as full payment. Medicare patients are not billed beyond the standard deductible and coinsurance.

PECOS PAC ID7416203385
PECOS Enrollment IDI20180706001592
Eligible to Order & Refer Part B Labs & Imaging Durable Medical Equipment Home Health Agency Power Mobility DevicesPer the CMS Ordering and Referring file. Eligibility means Medicare pays claims that this provider orders or refers for these categories.

Areas of Expertise CMS Part B claims

Services this provider delivered to Medicare fee-for-service patients, from the CMS Medicare utilization data. Higher counts generally reflect more experience with a service; care delivered outside Medicare is not included.

Subsequent hospital care with moderate levelof medical decision making, if using time, at least 35 minutes 99232
Follow-up hospital inpatient care involves daily check-ups while you're admitted in the hospital. Typically, a healthcare provider spends about 25 minutes each day reviewing your condition, adjusting treatment if needed, and answering any questions you might have.
339 services143 patients

Hospital Affiliations CMS Care Compare

Hospitals where this provider delivers care, identified from recent Medicare claims and place-of-service records.

North Shore University Hospital

Acute Care Hospitals · Manhasset, NY
4/5 CMS rating
OwnershipVoluntary non-profit - Private
CMS Certification Number330106
Location300 Community DriveManhasset, NY 11030 · Nassau County
Emergency services Birthing friendly

Physician Visit Costs CMS claims · ZIP area

Typical Medicare office-visit costs in the 11787 ZIP code area, from fee-for-service claims. These are area statistics, not this provider’s prices; actual charges vary by service and coverage.

New Patient
$105.06 typical visit price
range $67.40 – $203.53
Typical copayment $26.26 (range $16.85 – $50.88)
Most-billed visit code 99203
Established Patient
$117.62 typical visit price
range $21.66 – $164.45
Typical copayment $29.40 (range $5.41 – $41.11)
Most-billed visit code 99214
Amounts reflect what Medicare beneficiaries in this ZIP area are typically charged for office visits. Patients with other coverage should check their individual plans.

Referred Medical Equipment & Supplies CMS DME claims

Durable medical equipment, devices and supplies this provider ordered from DME suppliers for patients, from Medicare fee-for-service claims.

Supply allowance for therapeutic continuous glucose monitor (cgm), includes all supplies and accessories, 1 month supply = 1 unit of service K0553
DME-Other DME · category DE017N
1 supplier15 claims15 services$183.32 avg. paid by Medicare
Dollar amounts are the average Medicare paid the supplier per service. They are not the cost to the patient.

Other Providers at the Same Location NPPES 6

Providers registered at the same practice address, or within the immediate area, according to the NPPES registry.

Chiropractor
285 E MAIN ST, SUITE LL-6
SMITHTOWN, NY 11787
Dentist (General Practice)
285 E MAIN ST, SUITE 205
SMITHTOWN, NY 11787
Neuromusculoskeletal Medicine & OMM
285 E MAIN ST, SUITE LL5
SMITHTOWN, NY 11787
Physical Medicine & Rehabilitation (Sports Medicine)
285 E MAIN ST, SUITE LL5
SMITHTOWN, NY 11787
Urology
285 E MAIN ST, SUITE 207
SMITHTOWN, NY 11787
Physical Medicine & Rehabilitation (Sports Medicine)
285 E MAIN ST, SUITE LL5
SMITHTOWN, NY 11787

Frequently Asked Questions NPPES & CMS

Common questions about this NPI record, answered from the official NPPES registry and CMS datasets shown on this page.

What is Diane Grassi's NPI number?

The NPI number for Diane Grassi is 1063917136. It was assigned to this individual provider in the NPPES registry on March 29, 2018.

Where is Diane Grassi located?

Diane Grassi practices at 285 E Main St, Smithtown, NY 11787. The listed phone number is (631) 656-0874.

What is Diane Grassi's specialty?

The primary specialty registered for this NPI is Nurse Practitioner, specializing in Adult Health, with taxonomy code 363LA2200X.

Is Diane Grassi enrolled in Medicare?

Yes. Diane Grassi is registered in the Medicare PECOS system and accepts Medicare assignment, which means accepting the Medicare-approved amount as payment in full for covered services.

Is Diane Grassi affiliated with any hospitals?

According to CMS data, Diane Grassi is affiliated with North Shore University Hospital.

When was this NPI record last updated?

The NPPES record for Diane Grassi was last updated on January 7, 2019. NPI Profile syncs with the weekly NPPES data releases published by CMS.