JOHN DILLON CSW
NPI 1023139300
Social Worker - Clinical in Garden City, NY
About John Dillon Csw NPPES
Official registry information on file with the National Plan and Provider Enumeration System.
JOHN DILLON CSW (NPI 1023139300) is an individual clinical provider in Garden City, New York, licensed in New York (R053490-1) and active in the NPI registry since April 2007. He is enrolled in Medicare PECOS.
NPPES Registry Identity
Specialties & Licenses
Medicare Participation & PECOS CMS
Medicare enrollment, assignment, billing reassignment, and ordering and referring status from CMS.
Medicare Enrollment Status
Enrolled in Medicare (PECOS)
John Dillon Csw is registered in the CMS Provider Enrollment, Chain and Ownership System (PECOS).
Medicare Billing Reassignment
Medicare enrollment records show John Dillon reassigns Medicare billing to 1 organization. The organization bills Medicare for the services this provider delivers there.
Rockville Centre, NY 11571
- Reassigned Medicare billing, New York enrollment
- 266 clinicians in this Medicare group
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 11530 ZIP code area, from fee-for-service claims. These are area statistics, not this provider’s prices; actual charges vary by service and coverage.
Other Providers at the Same Location NPPES 4
Providers registered at the same practice address, or within the immediate area, according to the NPPES registry.
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 John Dillon's NPI number?
The NPI number for John Dillon is 1023139300. It was assigned to this individual provider in the NPPES registry on April 3, 2007.
Where is John Dillon located?
John Dillon practices at 385 Oak Street, Garden City, NY 11530. The listed phone number is (516) 705-3400.
What is John Dillon's specialty?
The primary specialty registered for this NPI is Social Worker, specializing in Clinical, with taxonomy code 1041C0700X.
Is John Dillon enrolled in Medicare?
Yes. John Dillon is registered in the Medicare PECOS enrollment system.
Which organization bills Medicare for John Dillon's services?
According to the CMS Revalidation Reassignment List (October 2026 release), John Dillon reassigns Medicare benefits to Mercy Medical Center (Rockville Centre, NY). The reassignment is filed with Medicare on form CMS-855R, signed by both the clinician and the organization, and lets the organization bill Medicare and receive payment for John Dillon's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.
When was this NPI record last updated?
The NPPES record for John Dillon was last updated on April 1, 2015. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 11 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.
# John Dillon, CSW · NPI 1023139300
Clinical provider in Garden City, New York. Individual provider, active in the CMS NPPES registry since April 3, 2007.
## Identity
- **NPI:** 1023139300 (Entity type: Individual)
- **Enumerated:** April 3, 2007
- **Primary specialty:** Social Worker - Clinical · taxonomy 1041C0700X
- **State license:** R053490-1 (New York)
- **Sole proprietor:** Yes
## Practice location
- **Address:** 385 OAK STREET, Garden City, NY 11530
- **Phone:** (516) 705-3400
## Medicare
- **Medicare:** Enrolled in Medicare (PECOS)
- **Ordering & referring:** eligible for Part B labs & imaging, durable medical equipment
- **Bills Medicare through:** Mercy Medical Center (NPI 1104097294, Rockville Centre, NY), under Medicare reassignment (form CMS-855R) · CMS Revalidation Reassignment List, October 2026 release
## Record status
- **NPPES last updated:** April 1, 2015
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Source: [NPI Profile](https://npiprofile.com/npi/1023139300) · Data from the CMS NPPES public registry.