Newly Listed Provider — this NPI profile has been added to the NPI registry within the last 90 days.

MARY KRISTIN THAYER FNP-C
NPI 1457268435
Nurse Practitioner - Family in Stony Brook, NY

Q: What is Mary Thayer's NPI number?

The NPI number for Mary Thayer is 1457268435. It was assigned to this individual provider in the NPPES registry on August 26, 2026.

Q: What is Mary Thayer's specialty?

The primary specialty registered for this NPI is Nurse Practitioner, specializing in Family, with taxonomy code 363LF0000X.

Q: When was this NPI record last updated?

The NPPES record for Mary Thayer was last updated on August 26, 2026. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 2 months 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 August 26, 2026PECOS Enrolled

101 NICOLLS RD, STONY BROOK, NY 11794(631) 444-4686 Get Directions Write a Review

NPPES record added: August 26, 2026. Verified against the NPPES registry weekly; last sync: November 08, 2026.

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About Mary Kristin Thayer Fnp-c NPPES

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

MARY KRISTIN THAYER FNP-C (NPI 1457268435) is an individual family provider in Stony Brook, New York, licensed in New York (360238) and active in the NPI registry since August 2026. She is enrolled in Medicare PECOS.

NPPES Registry Identity

NPI1457268435

Entity TypeIndividualFemale

Primary Taxonomy363LF0000X

Provider Legal NameMARY KRISTIN THAYERCredential: FNP-C

Location Address101 NICOLLS RDStony Brook, NY 11794-0001

Mailing Address101 Nicolls RdStony Brook, NY 11794-0001

Phone(631) 444-4686

Sole ProprietorNo

Enumeration DateAugust 26, 2026

NPPES CertifiedAugust 26, 2026

✔ NPI 1457268435 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses

★ Primary SpecialtyNurse Practitioner · FamilyPhysician Assistants & Advanced Practice Nursing Providers

Taxonomy Code363LF0000X

License✔ Licensed in NY · 360238

101 NICOLLS RD, Stony Brook, NY 11794

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Medicare Participation & PECOS CMS

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

Medicare Enrollment Status

✔

Enrolled in Medicare (PECOS)

Mary Kristin Thayer Fnp-c 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 11794 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

$117.62 typical visit price

range $21.66 – $164.45

Typical copayment $29.40 (range $5.41 – $41.11)

Most-billed visit code 99214

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 20

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

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