WARREN STEINBERG MD PC
NPI 1770770232
Internal Medicine in Westport, CT
About Warren Steinberg Md Pc NPPES
Official registry information on file with the National Plan and Provider Enumeration System.
WARREN STEINBERG MD PC (NPI 1770770232) is a healthcare organization registered as an internal medicine in Westport, Connecticut and active in the NPI registry since September 2007. The organization lists Warren Richard Steinberg, President, as its authorized official.
NPPES Registry Identity
Specialties & Licenses
Group Practice 1
Medicare Participation & PECOS CMS
Medicare enrollment, revalidation and the clinicians who bill Medicare through this organization, from CMS.
Medicare Enrollment Status
Enrolled in Medicare (PECOS)
Warren Steinberg Md Pc is registered in the CMS Provider Enrollment, Chain and Ownership System (PECOS).
Medicare Revalidation Due Date
Revalidation due by November 30, 2026
Medicare-enrolled providers and suppliers confirm their enrollment information with CMS on a set cycle, every 5 years for most and every 3 years for medical equipment suppliers. CMS sets the due date for each enrollment.
Clinicians Billing Medicare Through This Organization
Medicare enrollment records show 1 clinician reassigns Medicare billing to Warren Steinberg MD PC, which bills Medicare for the services this clinician delivers.
Clinician (1)
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 for Provider-Performed Microscopy Procedures (PPMP) 07D0101939
Warren R Steinberg MD · Westport, CTFrequently 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 Warren Steinberg MD PC's NPI number?
The NPI number for Warren Steinberg MD PC is 1770770232. It was assigned to this organization in the NPPES registry on September 28, 2007.
Where is Warren Steinberg MD PC located?
Warren Steinberg MD PC is located at 225 Main St, Westport, CT 06880. The listed phone number is (203) 222-9533.
What is Warren Steinberg MD PC's specialty?
The primary specialty registered for this NPI is Internal Medicine with taxonomy code 207R00000X.
Is Warren Steinberg MD PC enrolled in Medicare?
Yes. Warren Steinberg MD PC is registered in the Medicare PECOS enrollment system.
When is Warren Steinberg MD PC's Medicare revalidation due?
According to the CMS Revalidation Due Date List (October 2026 release), the Medicare Non-DME Part B enrollment for this organization (Connecticut, Clinic/Group Practice) is due for revalidation by November 30, 2026. Medicare providers and suppliers revalidate their enrollment every 5 years, and medical equipment suppliers every 3 years. Confirm current requirements with your Medicare Administrative Contractor.
How many clinicians bill Medicare through Warren Steinberg MD PC?
According to the CMS Revalidation Reassignment List (October 2026 release), 1 clinician (Internal Medicine) reassigns their Medicare billing to Warren Steinberg MD PC. 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. Reassignment records can lag staffing changes; confirm a current affiliation with the organization.
When was this NPI record last updated?
The NPPES record for Warren Steinberg MD PC was last updated on September 28, 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.
# Warren Steinberg Md Pc · NPI 1770770232
Internal Medicine organization in Westport, Connecticut. Organization record, active in the CMS NPPES registry since September 28, 2007.
## Identity
- **NPI:** 1770770232 (Entity type: Organization)
- **Enumerated:** September 28, 2007
- **Primary specialty:** Internal Medicine · taxonomy 207R00000X
- **Organization subpart:** No
- **Authorized official:** Warren Steinberg, PRESIDENT
## Practice location
- **Address:** 225 MAIN ST, Westport, CT 06880-3216
- **Phone:** (203) 222-9533 · **Fax:** (203) 222-1933
## Medicare
- **Medicare:** Enrolled in Medicare (PECOS)
- **Medicare revalidation due:** November 30, 2026 (Non-DME Part B, Connecticut, Clinic/Group Practice) · CMS Revalidation Due Date List, October 2026 release
- **Clinicians billing through this organization:** 1 clinician (Internal Medicine) reassigns Medicare billing to this organization (form CMS-855R) · CMS Revalidation Reassignment List, October 2026 release
## Record status
- **NPPES last updated:** September 28, 2007
- **CLIA laboratory certificates:** 1 on file
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Source: [NPI Profile](https://npiprofile.com/npi/1770770232) · Data from the CMS NPPES public registry.