WILLIAM D NUNN II
NPI 1134860786
Pediatrics in Lake Grove, NY

Q: What is William Nunn's NPI number?

The NPI number for William Nunn is 1134860786. It was assigned to this individual provider in the NPPES registry on April 6, 2022.

Q: What is William Nunn's specialty?

The primary specialty registered for this NPI is Pediatrics with taxonomy code 208000000X.

Q: When was this NPI record last updated?

The NPPES record for William Nunn was last updated on July 30, 2025. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 14 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 April 06, 2022PECOS Enrolled

4 SMITH HAVEN MALL, LAKE GROVE, NY 11755(631) 444-7337(631) 444-2894 Get Directions Write a Review

NPPES record last updated: July 30, 2025. Verified against the NPPES registry weekly; last sync: October 25, 2026.

Record update history: Mar 26, 2025, Apr 6, 2022 (2 updates tracked since 2022).

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About William D Nunn Ii NPPES

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

WILLIAM D NUNN II (NPI 1134860786) is an individual pediatrics provider in Lake Grove, New York, licensed in New York (336386) and active in the NPI registry since April 2022. He is enrolled in Medicare PECOS.

NPPES Registry Identity

NPI1134860786

Entity TypeIndividualMale

Primary Taxonomy208000000X

Provider Legal NameWILLIAM D NUNN II

Location Address4 SMITH HAVEN MALLLake Grove, NY 11755-1219

Mailing Address101 Nicolls Rd, Hsc Level 11 Rm 040Stony Brook, NY 11794 · (631) 444-2020 · Fax (631) 444-2894

Phone(631) 444-7337

Fax(631) 444-2894

Sole ProprietorNo

Enumeration DateApril 6, 2022

Last NPPES UpdateJuly 30, 20252 updates tracked since enumeration

NPPES CertifiedJuly 30, 2025

✔ NPI 1134860786 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses

★ Primary SpecialtyPediatricsAllopathic & Osteopathic Physicians

Taxonomy Code208000000X

License✔ Licensed in NY · 336386

Definition

A pediatrician is concerned with the physical, emotional and social health of children from birth to young adulthood. Care encompasses a broad spectrum of health services ranging from preventive healthcare to the diagnosis and treatment of acute and chronic diseases. A pediatrician deals with biological, social and environmental influences on the developing child, and with the impact of disease and dysfunction on development.

4 SMITH HAVEN MALL, Lake Grove, NY 11755

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Medicare Participation & PECOS CMS

Medicare enrollment, assignment, billing reassignment, and ordering and referring status from CMS.

Medicare Enrollment Status

✔

Enrolled in Medicare (PECOS)

William D Nunn Ii 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.

Medicare Billing Reassignment

Medicare enrollment records show William Nunn reassigns Medicare billing to 1 organization. The organization bills Medicare for the services this provider delivers there.

Stony Brook Children's Service, University Faculty Practice Corporatio

3.4 mi

Pediatrics

SUNY @ STONY BROOK, HSC, L11, RM 020
Stony Brook, NY 11794

Reassigned Medicare billing, New York enrollment
191 clinicians in this Medicare group

NPI 1083660575 (631) 444-1362

Source: CMS Revalidation Reassignment List, October 2026 release. Reassignment records can lag staffing changes; confirm a current affiliation with the organization.

Physician Visit Costs CMS claims · ZIP area

Typical Medicare office-visit costs in the 11755 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 10

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

DR. SCOTT A STEIN D.O.

Internal Medicine