RHEUMATOLOGY ASSOCIATES OF L.I., LLP
NPI 1689660573
Specialist in Smithtown, NY
About Rheumatology Associates Of L.i., Llp NPPES
Official registry information on file with the National Plan and Provider Enumeration System.
RHEUMATOLOGY ASSOCIATES OF L.I., LLP (NPI 1689660573) is a healthcare organization registered as a specialist in Smithtown, New York and active in the NPI registry since September 2005. The organization holds an CLIA Accreditation certificate valid through December 22, 2027 and lists Lynette Byrnes, Business Administrator, as its authorized official.
NPPES Registry Identity
Specialties & Licenses
Other Identifiers 1
Group Practice 1
Medicare Participation & PECOS CMS
Medicare enrollment and the clinicians who bill Medicare through this organization, from CMS.
Medicare Enrollment Status
Enrolled in Medicare (PECOS)
Rheumatology Associates Of L.i., Llp is registered in the CMS Provider Enrollment, Chain and Ownership System (PECOS).
Clinicians Billing Medicare Through This Organization
13Medicare enrollment records show 13 clinicians reassign Medicare billing to Rheumatology Associates Of L.I., LLP, which bills Medicare for the services they deliver. Of these, 5 practice at this address and 8 within 10 miles. They are listed nearest first.
Clinicians by Medicare Specialty 3
Clinicians, nearest first (13)
Source: CMS Revalidation Reassignment List, October 2026 release. Reassignment records can lag staffing changes; confirm a current affiliation with the organization.
CLIA Laboratory Certificates CMS CLIA
Laboratory certificates issued under the Clinical Laboratory Improvement Amendments (CLIA) program, which sets federal quality standards for human laboratory testing in the United States. There is no official CMS crosswalk between CLIA and NPI numbers; these certificates are associated with this NPI by matching facility names, locations and phone numbers in the CMS CLIA registry.
Certificate of Accreditation 33D0159278
Rheumatology Associates Of Long Island · Smithtown, NYFrequently 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 Rheumatology Associates Of L.I., LLP's NPI number?
The NPI number for Rheumatology Associates Of L.I., LLP is 1689660573. It was assigned to this organization in the NPPES registry on September 26, 2005.
Where is Rheumatology Associates Of L.I., LLP located?
Rheumatology Associates Of L.I., LLP is located at 315 Middle Country Rd, Smithtown, NY 11787. The listed phone number is (631) 360-7778.
What is Rheumatology Associates Of L.I., LLP's specialty?
The primary specialty registered for this NPI is Specialist with taxonomy code 174400000X.
Is Rheumatology Associates Of L.I., LLP enrolled in Medicare?
Yes. Rheumatology Associates Of L.I., LLP is registered in the Medicare PECOS enrollment system.
How many clinicians bill Medicare through Rheumatology Associates Of L.I., LLP?
According to the CMS Revalidation Reassignment List (October 2026 release), 13 clinicians in 3 Medicare specialties reassign their Medicare billing to Rheumatology Associates Of L.I., LLP. A 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 the clinician's services. The largest specialties are Rheumatology (10), Internal Medicine (2) and Nurse Practitioner (1). Of these, 5 practice at this address and 8 within 10 miles. Reassignment records can lag staffing changes; confirm a current affiliation with the organization.
Does Rheumatology Associates Of L.I., LLP hold a CLIA laboratory certificate?
Yes. A Certificate of Accreditation (number 33D0159278) is associated with this NPI, valid through December 22, 2027. CLIA certificates authorize laboratory testing under the federal Clinical Laboratory Improvement Amendments program.
When was this NPI record last updated?
The NPPES record for Rheumatology Associates Of L.I., LLP was last updated on August 22, 2020. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 6 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.
# Rheumatology Associates Of L.i., Llp · NPI 1689660573
Specialist organization in Smithtown, New York. Organization record, active in the CMS NPPES registry since September 26, 2005.
## Identity
- **NPI:** 1689660573 (Entity type: Organization)
- **Enumerated:** September 26, 2005
- **Primary specialty:** Specialist · taxonomy 174400000X
- **Organization subpart:** No
- **Authorized official:** Lynette Byrnes, BUSINESS ADMINISTRATOR
## Practice location
- **Address:** 315 MIDDLE COUNTRY RD, Smithtown, NY 11787-2817
- **Phone:** (631) 360-7778 · **Fax:** (631) 979-1609
## Medicare
- **Medicare:** Enrolled in Medicare (PECOS)
- **Clinicians billing through this organization:** 13 clinicians in 3 Medicare specialties reassign Medicare billing to this organization (form CMS-855R); largest: Rheumatology (10), Internal Medicine (2), Nurse Practitioner (1); 5 practice at this address and 8 within 10 miles · CMS Revalidation Reassignment List, October 2026 release
## Record status
- **NPPES last updated:** August 22, 2020
- **Other identifiers:** Medicaid 02501664 (NY)
- **CLIA laboratory certificates:** 1 on file
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Source: [NPI Profile](https://npiprofile.com/npi/1689660573) · Data from the CMS NPPES public registry.