MR. WILLIAM MICHAEL GASSMANN MS RN NPP
NPI 1033390885
Nurse Practitioner - Psychiatric/Mental Health in Clifton Springs, NY

Active since November 21, 2007PECOS EnrolledAccepts Medicare Assignment
95.19/100
CMS Quality Rating
2 COULTER RD, CLIFTON SPRINGS, NY 14432(315) 462-1050(315) 462-0145 Get Directions Write a Review

NPPES record last updated: February 19, 2025. Verified against the NPPES registry weekly; last sync: July 26, 2026.

Record update history: Feb 19, 2025, Mar 30, 2021 (2 updates tracked since 2021).

About Mr. William Michael Gassmann Ms Rn Npp NPPES

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

MR. WILLIAM MICHAEL GASSMANN MS RN NPP (NPI 1033390885) is an individual psychiatric/mental health provider in Clifton Springs, New York, licensed in New York (401059) and active in the NPI registry since November 2007. He is enrolled in Medicare PECOS, is affiliated with Rochester General Hospital, and is a graduate of Other (2006).

NPPES Registry Identity

NPI1033390885
Entity TypeIndividualMale
Primary Taxonomy363LP0808X
Provider Legal NameMR. WILLIAM MICHAEL GASSMANNCredential: MS RN NPP
Location Address2 COULTER RDClifton Springs, NY 14432-1122
Mailing Address315 Science Parkway, University Of Rochester Strong Memorial HospitalRochester, NY 14620 · (585) 279-7825 · Fax (585) 256-1984
Fax(315) 462-0145
Sole ProprietorNo
Medical School CMSOtherGraduated 2006
Enumeration DateNovember 21, 2007
Last NPPES UpdateFebruary 19, 20252 updates tracked since enumeration
NPPES CertifiedFebruary 19, 2025
NPI 1033390885 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses 2

Primary SpecialtyNurse Practitioner · Psychiatric/Mental HealthPhysician Assistants & Advanced Practice Nursing Providers
Taxonomy Code363LP0808X
License Licensed in NY · 401059
Also ListedRegistered NurseTaxonomy 163W00000X · License 4929851 (NY)
2 COULTER RD, Clifton Springs, NY 14432

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

Mr. William Michael Gassmann Ms Rn Npp 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 ID2961636378
PECOS Enrollment IDI20131017000950
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.

Established patient office or other outpatient visit with low level od decision making, if using time, 20 minutes or more 99213
This is a routine visit for patients who have already been seen by the healthcare provider. During this approximately 20-29 minute appointment, your health status will be evaluated and any necessary treatments or tests will be discussed. It's a chance to address any health concerns you may have.
70 services42 patients

Hospital Affiliations CMS Care Compare 2

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

Rochester General Hospital

Acute Care Hospitals · Rochester, NY
2/5 CMS rating
OwnershipVoluntary non-profit - Private
CMS Certification Number330125
Location1425 Portland AvenueRochester, NY 14621 · Monroe County
Emergency services Birthing friendly

Clifton Springs Hospital And Clinic

Acute Care Hospitals · Clifton Springs, NY
3/5 CMS rating
OwnershipVoluntary non-profit - Private
CMS Certification Number330265
Location2 Coulter RoadClifton Springs, NY 14432 · Ontario County
Emergency services

Physician Visit Costs CMS claims · ZIP area

Typical Medicare office-visit costs in the 14432 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
$84.93 typical visit price
range $54.87 – $166.88
Typical copayment $21.23 (range $13.71 – $41.72)
Most-billed visit code 99203
Established Patient
$97.08 typical visit price
range $17.54 – $136.14
Typical copayment $24.27 (range $4.38 – $34.03)
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.

Medicare Quality Performance CMS QPP · MIPS

Performance in the CMS Quality Payment Program: the MIPS final score across four weighted categories, and the individual quality measures reported to Medicare.

95.19/100
MIPS Final ScoreMerit-based Incentive Payment System · CMS Quality Payment Program
Scored through an Alternative Payment Model
Quality70.62
Promoting Interoperability100
Improvement Activities40

Other Providers at the Same Location NPPES 20

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

Social Worker (Clinical)
2 COULTER RD
CLIFTON SPRINGS, NY 14432
Social Worker
2 COULTER RD
CLIFTON SPRINGS, NY 14432
Social Worker (Clinical)
2 COULTER RD
CLIFTON SPRINGS, NY 14432
Counselor (Mental Health)
2 COULTER RD
CLIFTON SPRINGS, NY 14432
Physical Therapist
2 COULTER RD
CLIFTON SPRINGS, NY 14432
Social Worker
2 COULTER RD
CLIFTON SPRINGS, NY 14432
Registered Nurse
2 COULTER RD
CLIFTON SPRINGS, NY 14432
Social Worker (Clinical)
2 COULTER RD
CLIFTON SPRINGS, NY 14432

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 William Gassmann's NPI number?

The NPI number for William Gassmann is 1033390885. It was assigned to this individual provider in the NPPES registry on November 21, 2007.

Where is William Gassmann located?

William Gassmann practices at 2 Coulter Rd, Clifton Springs, NY 14432. The listed phone number is (315) 462-1050.

What is William Gassmann's specialty?

The primary specialty registered for this NPI is Nurse Practitioner, specializing in Psychiatric/Mental Health, with taxonomy code 363LP0808X.

Is William Gassmann enrolled in Medicare?

Yes. William Gassmann 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 William Gassmann affiliated with any hospitals?

According to CMS data, William Gassmann is affiliated with Rochester General Hospital and Clifton Springs Hospital And Clinic.

When was this NPI record last updated?

The NPPES record for William Gassmann was last updated on February 19, 2025. NPI Profile syncs with the weekly NPPES data releases published by CMS.