CITY MEDICAL OF UPPER EAST SIDE, PLLC
NPI 1811485188
Clinic/Center - Urgent Care in Riverhead, NY
About City Medical Of Upper East Side, Pllc NPPES
Official registry information on file with the National Plan and Provider Enumeration System.
CITY MEDICAL OF UPPER EAST SIDE, PLLC (NPI 1811485188), doing business as Citymd Urgent Care, is a healthcare organization registered as an urgent care in Riverhead, New York and active in the NPI registry since April 2018. The organization holds a CLIA Waiver certificate valid through March 26, 2027 and lists Swahili Henry, Director Of Payment Solutions, as its authorized official.
NPPES Registry Identity
Specialties & Licenses
Other Names 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)
City Medical Of Upper East Side, Pllc is registered in the CMS Provider Enrollment, Chain and Ownership System (PECOS).
Clinicians Billing Medicare Through This Organization
593Medicare enrollment records show 593 clinicians reassign Medicare billing to City Medical Of Upper East Side, PLLC, which bills Medicare for the services they deliver. Listed here are the 20 practicing nearest to this location.
Clinicians by Medicare Specialty 35
Nearest to this location (20)
See all 593Stony Brook, NY 11794
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 Waiver 33D2136392
City Medical Of Upper East Side PLLC · Riverhead, 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 City Medical Of Upper East Side, PLLC's NPI number?
The NPI number for City Medical Of Upper East Side, PLLC is 1811485188. It was assigned to this organization in the NPPES registry on April 23, 2018. The provider is doing business as CityMD Urgent Care.
Where is City Medical Of Upper East Side, PLLC located?
City Medical Of Upper East Side, PLLC is located at 999 Old Country Rd, Riverhead, NY 11901. The listed phone number is (631) 284-5900.
What is City Medical Of Upper East Side, PLLC's specialty?
The primary specialty registered for this NPI is Clinic/Center, specializing in Urgent Care, with taxonomy code 261QU0200X.
Is City Medical Of Upper East Side, PLLC enrolled in Medicare?
Yes. City Medical Of Upper East Side, PLLC is registered in the Medicare PECOS enrollment system.
How many clinicians bill Medicare through City Medical Of Upper East Side, PLLC?
According to the CMS Revalidation Reassignment List (October 2026 release), 593 clinicians in 35 Medicare specialties reassign their Medicare billing to City Medical Of Upper East Side, PLLC. 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 Emergency Medicine (214), Family Practice (170) and Internal Medicine (59). Reassignment records can lag staffing changes; confirm a current affiliation with the organization.
Does City Medical Of Upper East Side, PLLC hold a CLIA laboratory certificate?
Yes. A Certificate of Waiver (number 33D2136392) is associated with this NPI, valid through March 26, 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 City Medical Of Upper East Side, PLLC was last updated on March 5, 2025. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 19 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.
# City Medical Of Upper East Side, Pllc · NPI 1811485188
Urgent Care organization in Riverhead, New York. Organization record, active in the CMS NPPES registry since April 23, 2018.
## Identity
- **NPI:** 1811485188 (Entity type: Organization)
- **Enumerated:** April 23, 2018
- **Primary specialty:** Clinic/Center - Urgent Care · taxonomy 261QU0200X
- **Also known as:** CityMD Urgent Care (Doing Business As)
- **Organization subpart:** Yes (part of City Medical Of Upper East Side, Pllc)
- **Authorized official:** Swahili Henry, DIRECTOR OF PAYMENT SOLUTIONS
## Practice location
- **Address:** 999 OLD COUNTRY RD, Riverhead, NY 11901-2113
- **Phone:** (631) 284-5900 · **Fax:** (631) 369-2819
## Medicare
- **Medicare:** Enrolled in Medicare (PECOS)
- **Clinicians billing through this organization:** 593 clinicians in 35 Medicare specialties reassign Medicare billing to this organization (form CMS-855R); largest: Emergency Medicine (214), Family Practice (170), Internal Medicine (59); [full list](https://npiprofile.com/npi/1811485188/clinicians) · CMS Revalidation Reassignment List, October 2026 release
## Record status
- **NPPES last updated:** March 5, 2025
- **CLIA laboratory certificates:** 1 on file
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Source: [NPI Profile](https://npiprofile.com/npi/1811485188) · Data from the CMS NPPES public registry.