CESAR A SIERRA MD LLC
NPI 1073702338
Ophthalmology in Westport, CT
About Cesar A Sierra Md Llc NPPES
Official registry information on file with the National Plan and Provider Enumeration System.
CESAR A SIERRA MD LLC (NPI 1073702338) is a healthcare organization registered as an ophthalmology in Westport, Connecticut and active in the NPI registry since October 2007. The organization lists Cesar Sierra, Owner, as its authorized official.
NPPES Registry Identity
Specialties & Licenses
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)
Cesar A Sierra Md Llc is registered in the CMS Provider Enrollment, Chain and Ownership System (PECOS).
Clinicians Billing Medicare Through This Organization
Medicare enrollment records show 1 clinician reassigns Medicare billing to Cesar A Sierra MD LLC, 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.
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 Cesar A Sierra MD LLC's NPI number?
The NPI number for Cesar A Sierra MD LLC is 1073702338. It was assigned to this organization in the NPPES registry on October 23, 2007.
Where is Cesar A Sierra MD LLC located?
Cesar A Sierra MD LLC is located at 125 Kings Hwy N Ste B, Westport, CT 06880. The listed phone number is (203) 226-1696.
What is Cesar A Sierra MD LLC's specialty?
The primary specialty registered for this NPI is Ophthalmology with taxonomy code 207W00000X.
Is Cesar A Sierra MD LLC enrolled in Medicare?
Yes. Cesar A Sierra MD LLC is registered in the Medicare PECOS enrollment system.
How many clinicians bill Medicare through Cesar A Sierra MD LLC?
According to the CMS Revalidation Reassignment List (October 2026 release), 1 clinician (Ophthalmology) reassigns their Medicare billing to Cesar A Sierra MD LLC. 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 Cesar A Sierra MD LLC was last updated on April 4, 2018. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 8 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.
# Cesar A Sierra Md Llc · NPI 1073702338
Ophthalmology organization in Westport, Connecticut. Organization record, active in the CMS NPPES registry since October 23, 2007.
## Identity
- **NPI:** 1073702338 (Entity type: Organization)
- **Enumerated:** October 23, 2007
- **Primary specialty:** Ophthalmology · taxonomy 207W00000X
- **Organization subpart:** No
- **Authorized official:** Cesar Sierra, OWNER
## Practice location
- **Address:** 125 KINGS HWY N STE B, Westport, CT 06880-2428
- **Phone:** (203) 226-1696
## Medicare
- **Medicare:** Enrolled in Medicare (PECOS)
- **Clinicians billing through this organization:** 1 clinician (Ophthalmology) reassigns Medicare billing to this organization (form CMS-855R) · CMS Revalidation Reassignment List, October 2026 release
## Record status
- **NPPES last updated:** April 4, 2018
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Source: [NPI Profile](https://npiprofile.com/npi/1073702338) · Data from the CMS NPPES public registry.