Mark William Knakal, D.D.S.
Periodontics · East Setauket, NY
Mark William Knakal, D.D.S. is a periodontics with a practice address in East Setauket, New York, and NPI 1689895054, issued on May 1, 2007. Check the license (New York 050160-1, as entered in NPPES) with the New York board that licenses this profession; the Medicare figures below come from public CMS files.
- Name
- Mark William Knakal
- Credential
- D.D.S.
- Primary taxonomy
- Periodontics 1223P0300X
- License number
- 050160-1 NY
Self-reported in NPPES; status is on the state search - Practice location
- 3400 Nesconset Hwy Ste 109, East Setauket, NY 11733
- Phone
- (631) 751-6700
- Enumerated
- May 1, 2007
- Record last updated
- Jul 8, 2007 (not updated in 19 years: call before relying on the address or phone)
- Fax
- (631) 751-1124
- Entity
- Type 1 · individual
8 nearest periodontics records → All 565 in New York → Look up another NPI →
Verify Mark William Knakal 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 050160-1Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
48% more Medicare Part D claims than the average periodontics in 2024
409 Medicare Part D claims for 209 beneficiaries, against an average of 277 among the 4,191 providers of this specialty who prescribed in Part D. Brand-name drugs were 0% of claims. 50 claims were for opioids.
Most prescribed
- Amoxicillin207 claims
- Ibuprofen105 claims
- Azithromycin38 claims
- Acetaminophen-Codeine23 claims
- Hydrocodone-Acetaminophen23 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.
Industry payments in 2024: $27.88
2 payments; by number, the most common kind was food and beverage; the largest payer was Dentsply Sirona Inc. The 2,966 providers of this specialty with any payment received $1,338.41 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.
Mark William Knakal among 565 periodontics records in New York
Mark William Knakal, D.D.S. is one of 565 periodontics records with a practice address in New York. 70% 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 28% of them.
- NPI issued2007 · 28% of these records are older, 36% newer
- In a Medicare fileYes · 70% of these records are
- In the CMS Doctors and Clinicians fileNo · under 1% of these records are
- Record last updated2007 · 80% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 1223P0300X and a New York practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
Periodontics providers in New York
There are 565 periodontics records in New York.
All 565 in New York → Every provider in East Setauket → Periodontics nationwide →
The 8 periodontics records with the nearest ZIP codes
- Steven Zove, DDSEast Setauket, NY 117331902929706
- Biagio Lepre, DDSEast Northport, NY 117311528274172
- Vikas Mittle, D.D.S.Farmingdale, NY 117351942328158
- Jane Darviche, DMDDeer Park, NY 117291891895298
- Sheryl Varnai, DDSFarmingville, NY 117381730369059
- Alan Berman, D.D.S.Commack, NY 117251528185642
- Jeffrey Rosario, D.D.S.Commack, NY 117251013048032
- William Greene, D.M.D.Huntington, NY 117431518115716
Common questions
What is Mark William Knakal, D.D.S.'s NPI number?
Mark William Knakal, D.D.S.'s National Provider Identifier (NPI) is 1689895054, issued on May 1, 2007. An NPI identifies a provider in billing; it is not a license.
Where is Mark William Knakal, D.D.S. located?
The NPPES record lists a practice address at 3400 Nesconset Hwy Ste 109, East Setauket, NY, 11733. Phone: (631) 751-6700. Providers update this record themselves, so call before visiting.
How can I verify Mark William Knakal, D.D.S.'s license?
NPPES lists New York license number 050160-1, as entered by the provider. Search the New York board that licenses this profession; the NPPES record confirms identity only.
How much does Mark William Knakal, D.D.S. prescribe under Medicare Part D?
In 2024, Mark William Knakal, D.D.S. had 409 Medicare Part D claims for 209 beneficiaries; the average among periodontics prescribers was 277. 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.