DR. WILLIAM C GEHRHARDT M.D.
NPI 1649297797
Pediatrics in Greenlawn, NY

Q: What is William Gehrhardt's NPI number?

The NPI number for William Gehrhardt is 1649297797. It was assigned to this individual provider in the NPPES registry on July 16, 2006.

Q: What is William Gehrhardt'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 Gehrhardt 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.

Active since July 16, 2006PECOS Enrolled

284 PULASKI RD, GREENLAWN, NY 11740(631) 425-5250(631) 425-0140 Get Directions Write a Review

NPPES record last updated: July 8, 2007. Verified against the NPPES registry weekly; last sync: October 25, 2026.

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About Dr. William C Gehrhardt M.d. NPPES

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

DR. WILLIAM C GEHRHARDT M.D. (NPI 1649297797) is an individual pediatrics provider in Greenlawn, New York, licensed in New York (224722) and active in the NPI registry since July 2006. He is enrolled in Medicare PECOS.

NPPES Registry Identity

NPI1649297797

Entity TypeIndividualMale

Primary Taxonomy208000000X

Provider Legal NameDR. WILLIAM C GEHRHARDTCredential: M.D.

Location Address284 PULASKI RDGreenlawn, NY 11740-1602

Mailing Address284 Pulaski RdGreenlawn, NY 11740-1602 · (631) 425-5250 · Fax (631) 425-0140

Phone(631) 425-5250

Fax(631) 425-0140

Sole ProprietorNo

Enumeration DateJuly 16, 2006

Last NPPES UpdateJuly 8, 2007

✔ NPI 1649297797 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses

★ Primary SpecialtyPediatricsAllopathic & Osteopathic Physicians

Taxonomy Code208000000X

License✔ Licensed in NY · 224722

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.

284 PULASKI RD, Greenlawn, NY 11740

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Other Identifiers 3

Medicare UPINI04215NY

Medicaid02389628NY

Medicare ID-Type Unspecified527X81NY

Medicare Participation & PECOS CMS

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

Medicare Enrollment Status

✔

Enrolled in Medicare (PECOS)

Dr. William C Gehrhardt M.d. 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 Reassignments

Medicare enrollment records show William Gehrhardt reassigns Medicare billing to 3 organizations. Each organization bills Medicare for the services this provider delivers there; the nearest is listed first.

Huntington Hospital Dolan Family Health Center

Same address

Health Service

284 PULASKI RD
Greenlawn, NY 11740

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

NPI 1578593588 (631) 425-5250

Huntington Hospital Association

2.0 mi

Physician Assistant

270 PARK AVE
Huntington, NY 11743

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

NPI 1386619385 (631) 547-6392

North Shore-Lij Medical PC

17 mi

Urology

1010 NORTHERN BLVD STE 110
Great Neck, NY 11021

Reassigned Medicare billing, New York enrollment
9,353 clinicians in this Medicare group

NPI 1053688572 (516) 321-7400

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 11740 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.

KATHERINE MURPHY DO

Family Medicine