William Michael Hassan, DDS
General Practice Dentistry · Mayfield, NY
William Michael Hassan, DDS is a general practice dentistry with a practice address in Mayfield, New York, and NPI 1164551792, issued on Mar 2, 2007. Check the license (New York 0400541, 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 Hassan
- Credential
- DDS
- Primary taxonomy
- General Practice Dentistry 1223G0001X
- License number
- 0400541 NY
Self-reported in NPPES; status is on the state search - Practice location
- 2540 State Highway 30, Mayfield, NY 12117
- Phone
- (518) 661-6405
- Enumerated
- Mar 2, 2007
- Record last updated
- Jul 8, 2007 (not updated in 19 years: call before relying on the address or phone)
- Fax
- (518) 661-7765
- Entity
- Type 1 · individual
8 nearest general practice dentistry records → All 7,828 in New York → Look up another NPI →
Verify William Michael Hassan 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 0400541Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
35% more Medicare Part D claims than the average general practice dentistry in 2024
112 Medicare Part D claims for 65 beneficiaries, against an average of 83 among the 70,290 providers of this specialty who prescribed in Part D. Brand-name drugs were 0% of claims.
Most prescribed
- Amoxicillin49 claims
- Azithromycin25 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.
William Michael Hassan among 7,828 general practice dentistry records in New York
William Michael Hassan, DDS is one of 7,828 general practice dentistry records with a practice address in New York. 60% 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 35% of them.
- NPI issued2007 · 35% of these records are older, 35% newer
- In a Medicare fileYes · 60% of these records are
- In the CMS Doctors and Clinicians fileNo · under 1% of these records are
- Record last updated2007 · 79% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 1223G0001X and a New York practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
1 general practice dentistry record lists a practice address in Mayfield
They are 1 of the 21 NPPES records with a practice address in Mayfield, and 7,828 general practice dentistry records in New York.
All 7,828 in New York → Every provider in Mayfield → General Practice Dentistry nationwide →
The 8 general practice dentistry records with the nearest ZIP codes
- Chris Arena, DMDLatham, NY 121101457499766
- Bhupinder Bhattal, DDSLatham, NY 121101932254935
- Lise Bradley, DDSLatham, NY 121101326100397
- Debra Check, D.D.S.Latham, NY 121101871623421
- Issa Daoui, DMDLatham, NY 121101922835024
- Jason Harris, DDSLatham, NY 121101801100938
- Yaelle Legallais, DMDLatham, NY 121101477230175
- David Malicki, DDSLatham, NY 121101801011986
Common questions
What is William Michael Hassan, DDS's NPI number?
William Michael Hassan, DDS's National Provider Identifier (NPI) is 1164551792, issued on Mar 2, 2007. An NPI identifies a provider in billing; it is not a license.
Where is William Michael Hassan, DDS located?
The NPPES record lists a practice address at 2540 State Highway 30, Mayfield, NY, 12117. Phone: (518) 661-6405. Providers update this record themselves, so call before visiting.
How can I verify William Michael Hassan, DDS's license?
NPPES lists New York license number 0400541, 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 Hassan, DDS prescribe under Medicare Part D?
In 2024, William Michael Hassan, DDS had 112 Medicare Part D claims for 65 beneficiaries; the average among general practice dentistry prescribers was 83. Part D covers Medicare prescriptions only.
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.