William Michael Gassmann, MS RN NPP
Psychiatric/Mental Health Nurse Practitioner · Clifton Springs, NY
William Michael Gassmann, MS RN NPP is a psychiatric/mental health nurse practitioner with a practice address in Clifton Springs, New York, and NPI 1033390885, issued on Nov 21, 2007. Check the license (New York 401059, as entered in NPPES) with the New York board that licenses this profession; the Medicare figures below come from public CMS files.
- Name
- William Michael Gassmann
- Credential
- MS RN NPP
- Primary taxonomy
- Psychiatric/Mental Health Nurse Practitioner 363LP0808X
- License numbers
- 401059 NY
4929851 NY
Self-reported in NPPES; status is on the state search - Practice location
- 2 Coulter RD, Clifton Springs, NY 14432
- Phone
- (315) 462-1050
- Enumerated
- Nov 21, 2007
- Record last updated
- Feb 19, 2025
- Fax
- (315) 462-0145
- Medicare enrollment
- Enrolled (PECOS I20131017000950); accepts Medicare assignment
- Telehealth
- Offers telehealth (CMS)
- Entity
- Type 1 · individual
8 nearest psychiatric/mental health nurse practitioner records → All 4,129 in New York → Look up another NPI →
Also registered at 2 Coulter RD
A shared address usually means a shared clinic or building; it does not show who employs whom.
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- Paul Bishop, LMSWCounselor1821818592
- Terri Blood, RNRegistered Nurse1457890832
- Leah BrownStudent in an Organized Health Care Education/Training Program1215580337
Verify William Michael Gassmann in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersWhich New York board licenses this profession
Search for license 401059Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
3.5 times the Medicare Part D claims of the average psychiatric/mental health nurse practitioner in 2024
3,205 Medicare Part D claims for 215 beneficiaries, against an average of 906 among the 30,717 providers of this specialty who prescribed in Part D. Brand-name drugs were 3% of claims.
Most prescribed
- Bupropion Xl200 claims
- Trazodone Hcl189 claims
- Sertraline Hcl149 claims
- Quetiapine Fumarate139 claims
- Aripiprazole131 claims
- Venlafaxine Hcl Er128 claims
Source: CMS Medicare Part D Prescribers by Provider and Drug, 2024 (data.cms.gov). Part D covers prescriptions for Medicare patients only; drugs with fewer than 11 claims are not published.
The MIPS final score for 2023 (Medicare payment program): 95.2 of 100
The Merit-based Incentive Payment System score is reported for this clinician. Four categories are weighted into the final score; the average among 454,083 clinicians with a measured score was 83.5.
Source: CMS Quality Payment Program, MIPS performance year 2023; category weights for 2023 (qpp.cms.gov).
Industry payments in 2024: $18.19
1 payment: food and beverage; the largest payer was Neurocrine Biosciences, Inc. The 23,362 providers of this specialty with any payment received $1,027.77 on average. Payments are reported by manufacturers, not by the provider, and are not a sign of wrongdoing.
Source: CMS Open Payments, program year 2024 (openpaymentsdata.cms.gov); average among providers of this specialty with at least one payment.
Bills Medicare through one group practice
- Clifton Springs Sanitarium COClifton Springs, NY
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
William Michael Gassmann among 4,129 psychiatric/mental health nurse practitioner records in New York
William Michael Gassmann, MS RN NPP is one of 4,129 psychiatric/mental health nurse practitioner records with a practice address in New York. 68% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2007, is newer than 8% of them.
- NPI issued2007 · 8% of these records are older, 87% newer
- In a Medicare fileYes · 68% of these records are
- In the CMS Doctors and Clinicians fileYes · 46% of these records are
- Graduated2006 · median 2021 among the 1,914 with a school on file
- Record last updated2025 · 34% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 363LP0808X and a New York practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
3 psychiatric/mental health nurse practitioner records list a practice address in Clifton Springs
They are 3 of the 262 NPPES records with a practice address in Clifton Springs, and 4,129 psychiatric/mental health nurse practitioner records in New York.
All 4,129 in New York → Every provider in Clifton Springs → Psychiatric/Mental Health Nurse Practitioner nationwide →
The 8 psychiatric/mental health nurse practitioner records with the nearest ZIP codes
- Persephone Nelson, PMHNP-BCClifton Springs, NY 144321063941268
- Frederick Osborne, NPPClifton Springs, NY 144321972530426
- Shahid Ali, NPP, FNPChurchville, NY 144281376573733
- Erica Boccia, NPDansville, NY 144371639810872
- Glenn Hann, PNP, NPPDansville, NY 144371902006463
- Lisa Hooker, MSN, PMHNPDansville, NY 144371407210198
- Mitchell MillerDansville, NY 144371477471456
- April Sutton, NPDansville, NY 144371790324473
Common questions
What is William Michael Gassmann, MS RN NPP's NPI number?
William Michael Gassmann, MS RN NPP's National Provider Identifier (NPI) is 1033390885, issued on Nov 21, 2007. An NPI identifies a provider in billing; it is not a license.
Where is William Michael Gassmann, MS RN NPP located?
The NPPES record lists a practice address at 2 Coulter RD, Clifton Springs, NY, 14432. Phone: (315) 462-1050. Providers update this record themselves, so call before visiting.
How can I verify William Michael Gassmann, MS RN NPP's license?
NPPES lists New York license number 401059, as entered by the provider. Search the New York board that licenses this profession; the NPPES record confirms identity only.
How much does William Michael Gassmann, MS RN NPP prescribe under Medicare Part D?
In 2024, William Michael Gassmann, MS RN NPP had 3,205 Medicare Part D claims for 215 beneficiaries; the average among psychiatric/mental health nurse practitioner prescribers was 906. Part D covers Medicare prescriptions only.
What is William Michael Gassmann, MS RN NPP's MIPS final score?
The 2023 MIPS final score is 95.2 of 100. The average among 454,083 clinicians with a measured score was 83.5.
Source: CMS National Plan and Provider Enumeration System (NPPES), file of Aug 9, 2026 (NPPES files on CMS.gov); NUCC Health Care Provider Taxonomy. Medicare files from data.cms.gov. An NPI identifies who bills; it is not a license.
Figures on PlainDoctor are read from the federal files each page names (CMS NPPES, Medicare Part D, MIPS, Open Payments; the HHS-OIG exclusion list only as counts) and from Census population estimates, with the file date shown beside them. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error. Data current as of Aug 9, 2026.