Cesar A. Sierra, MD
Ophthalmology Physician · Westport, CT
Cesar A. Sierra, MD is an ophthalmology physician with a practice address in Westport, Connecticut, and NPI 1902997240, issued on Sep 28, 2006. Check the license (Connecticut 040323, as entered in NPPES) on the Connecticut Medical Examining Board; the Medicare figures below come from public CMS files.
- Name
- Cesar A. Sierra
- Credential
- MD
- Primary taxonomy
- Ophthalmology Physician 207W00000X
- License number
- 040323 CT
Self-reported in NPPES; status is on the state search - Practice location
- 162 Kings Hwy N, Westport, CT 06880
- Phone
- (203) 226-1696
- Enumerated
- Sep 28, 2006
- Record last updated
- Sep 26, 2007 (not updated in 19 years: call before relying on the address or phone)
- Fax
- (203) 226-7799
- Medicare enrollment
- Enrolled (PECOS I20050218000472); accepts Medicare assignment
- Medical or professional school
- University Central Del Caribe Escuela De Medicina, 1996
- Entity
- Type 1 · individual
8 nearest ophthalmology physician records → All 336 in Connecticut → Look up another NPI →
Also registered at 162 Kings Hwy N
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Janaki Amin, DPTPhysical Therapist1972971257
- Ai-Tram Bui, MDDermatology Physician1578140554
- Samuel Frumkin, M.D.Internal Medicine Physician1124120043
- Anne-Marie Lezeau, RN, PMHNP, DNPPsychiatric/Mental Health Nurse Practitioner1356076764
- Holly Mehne, MSWClinical Social Worker1831931278
- Randi Roth, PH.D.Psychologist1629135785
Verify Cesar A. Sierra in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersConnecticut Medical Examining Board
Search for license 040323Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
80% fewer Medicare Part D claims than the average ophthalmology physician in 2024
310 Medicare Part D claims for 145 beneficiaries, against an average of 1,518 among the 16,459 providers of this specialty who prescribed in Part D. Brand-name drugs were 15% of claims.
Most prescribed
- Erythromycin133 claims
- Cephalexin56 claims
- Restasis19 claims
- Neomycin-Polymyxin-Dexameth18 claims
- Azithromycin17 claims
- Tobramycin-Dexamethasone16 claims
Source: CMS Medicare Part D Prescribers by Provider and Drug, 2024 (data.cms.gov). Part D covers prescriptions for Medicare patients only; drugs with fewer than 11 claims are not published.
Cesar A. Sierra among 336 ophthalmology physician records in Connecticut
Cesar A. Sierra, MD is one of 336 ophthalmology physician records with a practice address in Connecticut. 76% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2006, is newer than 19% of them.
- NPI issued2006 · 19% of these records are older, 35% newer
- In a Medicare fileYes · 76% of these records are
- In the CMS Doctors and Clinicians fileYes · 63% of these records are
- Graduated1996 · median 2000 among the 212 with a school on file
- Record last updated2007 · 66% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 207W00000X and a Connecticut practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
9 ophthalmology physician records list a practice address in Westport
They are 9 of the 886 NPPES records with a practice address in Westport, and 336 ophthalmology physician records in Connecticut.
All 336 in Connecticut → Every provider in Westport → Ophthalmology Physician nationwide →
The 8 ophthalmology physician records with the nearest ZIP codes
- Michael Bautista, MDWestport, CT 068801689038671
- Claudia Castiblanco, M.D.Westport, CT 068801801056510
- Spiro Combest, MDWestport, CT 068801194934216
- Leslie Doctor, M.D.Westport, CT 068801780769968
- Judith Doctor, M.D.Westport, CT 068801992243174
- Jessica Flanagan, D.O.Westport, CT 068801891863635
- Jane Lubin, M.D.Westport, CT 068801336481852
- David Tucker, M.D.Westport, CT 068801780854380
Common questions
What is Cesar A. Sierra, MD's NPI number?
Cesar A. Sierra, MD's National Provider Identifier (NPI) is 1902997240, issued on Sep 28, 2006. An NPI identifies a provider in billing; it is not a license.
Where is Cesar A. Sierra, MD located?
The NPPES record lists a practice address at 162 Kings Hwy N, Westport, CT, 06880. Phone: (203) 226-1696. Providers update this record themselves, so call before visiting.
How can I verify Cesar A. Sierra, MD's license?
NPPES lists Connecticut license number 040323, as entered by the provider. Search the Connecticut Medical Examining Board at https://www.elicense.ct.gov/Lookup/LicenseLookup.aspx. The NPPES record confirms identity only; the state search shows license status, expiration and public orders.
How much does Cesar A. Sierra, MD prescribe under Medicare Part D?
In 2024, Cesar A. Sierra, MD had 310 Medicare Part D claims for 145 beneficiaries; the average among ophthalmology physician prescribers was 1,518. Part D covers Medicare prescriptions only.
Source: CMS National Plan and Provider Enumeration System (NPPES), file of Aug 9, 2026 (NPPES files on CMS.gov); NUCC Health Care Provider Taxonomy. Medicare files from data.cms.gov. An NPI identifies who bills; it is not a license.
Figures on PlainDoctor are read from the federal files each page names (CMS NPPES, Medicare Part D, MIPS, Open Payments; the HHS-OIG exclusion list only as counts) and from Census population estimates, with the file date shown beside them. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error. Data current as of Aug 9, 2026.