National Provider Identifier
William Michael Gassmann, MS RN NPP
William Michael Gassmann, MS RN NPP is listed in the NPPES registry with a primary specialty of Psychiatric/Mental Health Nurse Practitioner in Clifton Springs, NY and a listed phone number of (315) 462-1050.
Source: public NPPES record, last updated February 19, 2025. This profile is informational and is not medical advice, a quality rating, or a provider recommendation.
Profile Overview
- NPI
- 1033390885
- Provider Type
- Individual
- Primary Specialty
- Psychiatric/Mental Health Nurse Practitioner
- Enumeration Date
- November 21, 2007
- Last Updated
- February 19, 2025
Practice Location
- 2 Coulter RD
- Clifton Springs, NY 14432-1122
Phone: (315) 462-1050
Mailing Address
- 315 Science Parkway
- University Of Rochester Strong Memorial Hospital
- Rochester, NY 14620
Specialties
- Psychiatric/Mental Health Nurse Practitioner (363LP0808X)
- Registered Nurse (163W00000X)
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Medicare Part B Activity
Reported 212 Medicare fee-for-service service lines in 2023.
Peer comparison
Compared to Nurse Practitioner providers in the Rochester, NY metro area.
This provider is in the 79th percentile for Medicare service volume.
Higher volume than most peers.
Performs 122% more Medicare services than the peer median.
Higher than 620 of 786 peers.
- Activity Percentile
- 78.9%
- Rank by Services
- 165 of 786
- Total Services
- 212
- Est. Allowed Value
- $11,251.38
- Dataset Year
- 2023
- Drug Code Share
- 0.0%
Estimated allowed value reflects Medicare fee-for-service allowed amounts only. It does not include Medicare Advantage, commercial insurance, cash-pay services, or employment compensation.
Peers are grouped by the broader Nurse Practitioner classification rather than the exact subspecialty label shown elsewhere on the page.
Percentile distribution
Each bar represents a 10-point percentile band of peers by total Medicare services for Nurse Practitioner across the Rochester, NY metro area. Taller bars indicate higher service-volume bands. Highlighted bar marks this provider's percentile band.
Observed service range: 11 to 7,519 total Medicare services.
Top Clinical Services
- 99213: Established patient office or other outpatient visit, 20-29 minutes
199 services | $10,868.97
- 99212: Established patient office or other outpatient visit, 10-19 minutes
13 services | $382.41
Full Record
- NPI
- 1033390885
- Entity Type
- Individual
- Last Name
- Gassmann
- First Name
- William
- Middle Name
- Michael
- Name Prefix
- Mr.
- Credential
- MS RN NPP
- Mailing Street Address
- 315 Science Parkway
- Mailing Address Line 2
- University Of Rochester Strong Memorial Hospital
- Mailing City
- Rochester
- Mailing State
- NY
- Mailing ZIP Code
- 14620
- Mailing Country
- US
- Mailing Phone
- (585) 279-7825
- Mailing Fax
- (585) 256-1984
- Practice Street Address
- 2 Coulter RD
- Practice City
- Clifton Springs
- Practice State
- NY
- Practice ZIP Code
- 14432-1122
- Practice Country
- US
- Practice Phone
- (315) 462-1050
- Practice Fax
- (315) 462-0145
- Enumeration Date
- November 21, 2007
- Last Updated
- February 19, 2025
- Sex
- Male
- Sole Proprietor
- No
- Certification Date
- February 19, 2025
- updated_by_file
- npidata_pfile_20050523-20260308.csv
- Taxonomies
- Psychiatric/Mental Health Nurse Practitioner (363LP0808X), Registered Nurse (163W00000X)