Recently Updated NPI Information — some details in this NPI profile have been updated in the NPI registry within the last 60 days.

DR. ALAN LLOYD MAZER D.M.D.
NPI 1992794069
Dentist in Port Jefferson Station, NY

Q: What is Alan Mazer's NPI number?

The NPI number for Alan Mazer is 1992794069. It was assigned to this individual provider in the NPPES registry on October 20, 2005.

Q: What is Alan Mazer's specialty?

The primary specialty registered for this NPI is Dentist with taxonomy code 122300000X.

Q: Is Alan Mazer enrolled in Medicare?

No. Alan Mazer has opted out of Medicare through January 19, 2028. Care is provided under private contracts, and Medicare does not pay for services furnished by providers who have opted out. The provider remains eligible to order and refer services for Medicare patients.

Q: When was this NPI record last updated?

The NPPES record for Alan Mazer was last updated on July 13, 2026. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 29 days 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.

Active since October 20, 2005Opted out of Medicare · through Jan 19, 2028

140 TERRYVILLE RD, PORT JEFFERSON STATION, NY 11776(631) 473-0666(631) 473-0679 Get Directions Write a Review

NPPES record last updated: July 13, 2026. Verified against the NPPES registry weekly; last sync: August 09, 2026.

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About Dr. Alan Lloyd Mazer D.m.d. NPPES

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

DR. ALAN LLOYD MAZER D.M.D. (NPI 1992794069) is an individual dentist in Port Jefferson Station, New York, licensed in New York (30090) and active in the NPI registry since October 2005. He has opted out of Medicare through January 19, 2028 and remains eligible to order and refer.

NPPES Registry Identity

NPI1992794069

Entity TypeIndividualMale

Primary Taxonomy122300000X

Provider Legal NameDR. ALAN LLOYD MAZERCredential: D.M.D.

Location Address140 TERRYVILLE RDPort Jefferson Station, NY 11776-1330

Mailing Address15 Sandstone LnStony Brook, NY 11790-3101 · (631) 689-9598 · Fax (631) 473-0679

Phone(631) 473-0666

Fax(631) 473-0679

Sole ProprietorNo

Enumeration DateOctober 20, 2005

Last NPPES UpdateJuly 13, 2026

✔ NPI 1992794069 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses

★ Primary SpecialtyDentistDental Providers

Taxonomy Code122300000X

License✔ Licensed in NY · 30090

Definition

A dentist is a person qualified by a doctorate in dental surgery (D.D.S.) or dental medicine (D.M.D.), licensed by the state to practice dentistry, and practicing within the scope of that license. There is no difference between the two degrees: dentists who have a DMD or DDS have the same education. Universities have the prerogative to determine what degree is awarded. Both degrees use the same curriculum requirements set by the American Dental Association's Commission on Dental Accreditation. Generally, three or more years of undergraduate education plus four years of dental school is required to graduate and become a general dentist. State licensing boards accept either degree as equivalent, and both degrees allow licensed individuals to practice the same scope of general dentistry. Additional post-graduate training is required to become a dental specialist.

140 TERRYVILLE RD, Port Jefferson Station, NY 11776

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Medicare Participation & PECOS CMS

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

Medicare Enrollment Status

ⓘ

Opted out of Medicare

Dr. Alan Lloyd Mazer D.m.d. has filed a Medicare opt-out affidavit. Services are provided under private contract between the provider and the patient, and are not billed to or reimbursed by Medicare. The opt-out is on file from January 19, 2016 through January 19, 2028.

Opt-Out Effective DateJanuary 19, 2016

Opt-Out In Effect ThroughJanuary 19, 2028Opt-out affidavits renew automatically every two years unless cancelled

Eligible to Order & Refer✔ Part B Labs & Imaging✔ Durable Medical Equipment✔ Home Health Agency– Power Mobility DevicesAn opted-out provider can still order and refer for Medicare patients in the categories marked above, even though their own services are not covered.

Physician Visit Costs CMS claims · ZIP area

Typical Medicare office-visit costs in the 11776 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.

Other Providers at the Same Location NPPES

Providers registered at the same practice address, or within the immediate area, according to the NPPES registry.

DR. JULIA NICOLOSI DDS

Dentist (General Practice)

140 TERRYVILLE RD
PORT JEFFERSON STATION, NY 11776

Suffolk County (631) 473-3094

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 Alan Mazer's NPI number?

The NPI number for Alan Mazer is 1992794069. It was assigned to this individual provider in the NPPES registry on October 20, 2005.

Where is Alan Mazer located?

Alan Mazer practices at 140 Terryville Rd, Port Jefferson Station, NY 11776. The listed phone number is (631) 473-0666.

What is Alan Mazer's specialty?

The primary specialty registered for this NPI is Dentist with taxonomy code 122300000X.

Is Alan Mazer enrolled in Medicare?

No. Alan Mazer has opted out of Medicare through January 19, 2028. Care is provided under private contracts, and Medicare does not pay for services furnished by providers who have opted out. The provider remains eligible to order and refer services for Medicare patients.

When was this NPI record last updated?

The NPPES record for Alan Mazer was last updated on July 13, 2026. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 29 days 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.