Cassius Iyad N. Ochoa Chaar, M.D., M.S.
Vascular Surgery Physician · New Haven, CT
Cassius Iyad N. Ochoa Chaar, M.D., M.S. is a vascular surgery physician with a practice address in New Haven, Connecticut, and NPI 1669600698, issued on Jun 29, 2009. Check the license (Connecticut 049872, as entered in NPPES) on the Connecticut Medical Examining Board; the Medicare figures below come from public CMS files.
- Name
- Cassius Iyad N. Ochoa Chaar
- Credential
- M.D., M.S.
- Primary taxonomy
- Vascular Surgery Physician 2086S0129X
- License numbers
- 049872 CT
MT195605 PA
Self-reported in NPPES; status is on the state search - Practice location
- 330 Cedar St, New Haven, CT 06510
- Phone
- (203) 676-5835
- Enumerated
- Jun 29, 2009
- Record last updated
- Oct 8, 2014 (not updated in 12 years: call before relying on the address or phone)
- Medicare enrollment
- Enrolled (PECOS I20110815000166); accepts Medicare assignment
- Telehealth
- Offers telehealth (CMS)
- Entity
- Type 1 · individual
8 nearest vascular surgery physician records → All 89 in Connecticut → Look up another NPI →
Also registered at 330 Cedar St
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Adwoa Adu-Amoako, PAPhysician Assistant1629480207
- Nayif Alnaif, M.B.B.S.Plastic Surgery Physician1417213372
- Michael Alperovich, MDPlastic Surgery Physician1972762581
- Justin Blasberg, MDThoracic Surgery (Cardiothoracic Vascular Surgery) Physician1538391883
- Pramod Bonde, MDThoracic Surgery (Cardiothoracic Vascular Surgery) Physician1013192061
- Erica Buday De Oliveira Marnet, M.D.Student in an Organized Health Care Education/Training Program1629714365
Verify Cassius Iyad N. Ochoa Chaar in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersConnecticut Medical Examining Board
Search for license 049872Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
51% fewer Medicare Part D claims than the average vascular surgery physician in 2024
98 Medicare Part D claims for 29 beneficiaries, against an average of 201 among the 3,936 providers of this specialty who prescribed in Part D. Brand-name drugs were 34% of claims.
Most prescribed
- Clopidogrel48 claims
- Eliquis19 claims
- Xarelto11 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.
The practice group's MIPS final score for 2023 (Medicare payment program): 73.6 of 100
The Merit-based Incentive Payment System score is reported for the practice group, not for one clinician alone. Four categories are weighted into the final score; the average among 454,083 clinicians with a measured score was 83.5.
Source: CMS Quality Payment Program, MIPS performance year 2023, group reporting; category weights for 2023 (qpp.cms.gov).
Industry payments in 2024: $468.42
5 payments; by number, the most common kind was food and beverage; the largest payer was Endologix LLC. The 4,059 providers of this specialty with any payment received $6,178.00 on average. Payments are reported by manufacturers, not by the provider, and are not a sign of wrongdoing.
Source: CMS Open Payments, program year 2024 (openpaymentsdata.cms.gov); average among providers of this specialty with at least one payment.
Bills Medicare through one group practice
- Yale UniversityNew Haven, CT
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Cassius Iyad N. Ochoa Chaar among 89 vascular surgery physician records in Connecticut
Cassius Iyad N. Ochoa Chaar, M.D., M.S. is one of 89 vascular surgery physician records with a practice address in Connecticut. 91% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2009, is newer than 63% of them.
- NPI issued2009 · 63% of these records are older, 33% newer
- In a Medicare fileYes · 91% of these records are
- In the CMS Doctors and Clinicians fileYes · 80% of these records are
- Graduated2002 · median 2002 among the 71 with a school on file
- Record last updated2014 · 36% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 2086S0129X and a Connecticut practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
Vascular Surgery Physician providers in Connecticut
There are 89 vascular surgery physician records in Connecticut.
All 89 in Connecticut → Every provider in New Haven → Vascular Surgery Physician nationwide →
The 8 vascular surgery physician records with the nearest ZIP codes
- Isibor Arhuidese, MDNew Haven, CT 065101568825966
- Jonathan Cardella, M.D., FRCS (C)New Haven, CT 065101528348950
- Raul Guzman, M.D.New Haven, CT 065101083713416
- David Strosberg, M.D.New Haven, CT 065101891051876
- Michael Villarreal, MDNew Haven, CT 065101801283700
- Richard GusbergWest Haven, CT 065161609968494
- Edouard Aboian, M.D.New Haven, CT 065191588830566
- Bauer Sumpio, MD, PHDNew Haven, CT 065191750498671
Common questions
What is Cassius Iyad N. Ochoa Chaar, M.D., M.S.'s NPI number?
Cassius Iyad N. Ochoa Chaar, M.D., M.S.'s National Provider Identifier (NPI) is 1669600698, issued on Jun 29, 2009. An NPI identifies a provider in billing; it is not a license.
Where is Cassius Iyad N. Ochoa Chaar, M.D., M.S. located?
The NPPES record lists a practice address at 330 Cedar St, New Haven, CT, 06510. Phone: (203) 676-5835. Providers update this record themselves, so call before visiting.
How can I verify Cassius Iyad N. Ochoa Chaar, M.D., M.S.'s license?
NPPES lists Connecticut license number 049872, 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 Cassius Iyad N. Ochoa Chaar, M.D., M.S. prescribe under Medicare Part D?
In 2024, Cassius Iyad N. Ochoa Chaar, M.D., M.S. had 98 Medicare Part D claims for 29 beneficiaries; the average among vascular surgery physician prescribers was 201. Part D covers Medicare prescriptions only.
What is Cassius Iyad N. Ochoa Chaar, M.D., M.S.'s MIPS final score?
The 2023 MIPS final score is 73.6 of 100, reported for the practice group. The average among 454,083 clinicians with a measured score was 83.5.
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.