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DR. MARK WILLIAM KNAKAL D.D.S.
NPI 1689895054
Dentist - Periodontics in East Setauket, NY

Active since May 01, 2007PECOS Enrolled
3400 NESCONSET HWY STE 109, EAST SETAUKET, NY 11733(631) 751-6700(631) 751-1124 Get Directions Write a Review

NPPES record last updated: July 8, 2007. Verified against the NPPES registry weekly; last sync: August 02, 2026.

About Dr. Mark William Knakal D.d.s. NPPES

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

DR. MARK WILLIAM KNAKAL D.D.S. (NPI 1689895054) is an individual periodontics provider in East Setauket, New York, licensed in New York (050160-1) and active in the NPI registry since May 2007. He is enrolled in Medicare PECOS.

NPPES Registry Identity

NPI1689895054
Entity TypeIndividualMale
Primary Taxonomy1223P0300X
Provider Legal NameDR. MARK WILLIAM KNAKALCredential: D.D.S.
Location Address3400 NESCONSET HWY STE 109East Setauket, NY 11733-3327
Mailing Address2 Moss Creek LnEast Patchogue, NY 11772-6160
Phone(631) 751-6700
Fax(631) 751-1124
Sole ProprietorYes
Enumeration DateMay 1, 2007
Last NPPES UpdateJuly 8, 2007
✔ NPI 1689895054 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses

★ Primary SpecialtyDentist · PeriodonticsDental Providers
Taxonomy Code1223P0300X
License✔ Licensed in NY · 050160-1
Definition
That specialty of dentistry which encompasses the prevention, diagnosis and treatment of diseases of the supporting and surrounding tissues of the teeth or their substitutes and the maintenance of the health, function and esthetics of these structures and tissues.
3400 NESCONSET HWY STE 109, East Setauket, NY 11733
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Accepted Insurance

The full list of accepted plans is on the Insurance tab. Issuers include Blue Cross and Blue Shield of Montana, Blue Cross and Blue Shield of Oklahoma, Blue Cross and Blue Shield of Texas and more.Insurance ›

Medicare Participation & PECOS CMS

Medicare enrollment, assignment, and ordering and referring status from the CMS PECOS system.

Medicare Enrollment Status

✔

Enrolled in Medicare (PECOS)

Dr. Mark William Knakal D.d.s. is registered in the CMS Provider Enrollment, Chain and Ownership System (PECOS).

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.

Physician Visit Costs CMS claims · ZIP area

Typical Medicare office-visit costs in the 11733 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
$105.06 typical visit price
range $67.40 – $203.53
Typical copayment $26.26 (range $16.85 – $50.88)
Most-billed visit code 99203
Established Patient
$83.44 typical visit price
range $21.66 – $164.45
Typical copayment $20.86 (range $5.41 – $41.11)
Most-billed visit code 99213
Amounts reflect what Medicare beneficiaries in this ZIP area are typically charged for office visits. Patients with other coverage should check their individual plans.

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 Mark Knakal's NPI number?

The NPI number for Mark Knakal is 1689895054. It was assigned to this individual provider in the NPPES registry on May 1, 2007.

Where is Mark Knakal located?

Mark Knakal practices at 3400 Nesconset Hwy Ste 109, East Setauket, NY 11733. The listed phone number is (631) 751-6700.

What is Mark Knakal's specialty?

The primary specialty registered for this NPI is Dentist, specializing in Periodontics, with taxonomy code 1223P0300X.

Is Mark Knakal enrolled in Medicare?

Yes. Mark Knakal is registered in the Medicare PECOS enrollment system.

What insurance does Mark Knakal accept?

Health plans from Blue Cross and Blue Shield of Montana, Blue Cross and Blue Shield of Oklahoma, Blue Cross and Blue Shield of Texas, Humana and Renaissance Dental list Mark Knakal as in-network in at least one marketplace plan. Coverage varies by plan and year; verify with the insurer or the provider before a visit.

When was this NPI record last updated?

The NPPES record for Mark Knakal was last updated on July 8, 2007. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 19 years ago. If this record has changed at CMS more recently, you can request an on-demand re-check against the live CMS registry, directly from this page.