Mario David Felix, MD
Rheumatology Physician · New Haven, CT
Mario David Felix, MD is a rheumatology physician with a practice address in New Haven, Connecticut, and NPI 1760986046, issued on Mar 21, 2018. Check the license (Connecticut 80999, as entered in NPPES) on the Connecticut Medical Examining Board; the Medicare figures below come from public CMS files.
- Name
- Mario David Felix
- Credential
- MD
- Primary taxonomy
- Rheumatology Physician 207RR0500X
- License number
- 80999 CT
Self-reported in NPPES; status is on the state search - Practice location
- 20 York St, New Haven, CT 06510
- Phone
- (203) 688-4242
- Enumerated
- Mar 21, 2018
- Record last updated
- Jul 3, 2025
- Medicare enrollment
- Enrolled (PECOS I20251124000016); may accept Medicare assignment
- Medical or professional school
- University Of Connecticut School Of Medicine, 2018
- Entity
- Type 1 · individual
8 nearest rheumatology physician records → All 145 in Connecticut → Look up another NPI →
Also registered at 20 York St
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Cyrena Abbasi, MDStudent in an Organized Health Care Education/Training Program1609703289
- Ali Abboud, MD, MBAStudent in an Organized Health Care Education/Training Program1942943097
- Basil Abdalla, MDStudent in an Organized Health Care Education/Training Program1154905057
- Jasmina AbdallaStudent in an Organized Health Care Education/Training Program1700638590
- Sarah AbdallahPsychiatry Physician1740800952
- Usama Abdelghany, PHARM DOncology Pharmacist1548827843
Verify Mario David Felix in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersConnecticut Medical Examining Board
Search for license 80999Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
90% fewer Medicare Part D claims than the average rheumatology physician in 2024
207 Medicare Part D claims for 36 beneficiaries, against an average of 1,978 among the 6,301 providers of this specialty who prescribed in Part D.
Most prescribed
- Prednisone37 claims
- Hydroxychloroquine Sulfate24 claims
- Celecoxib15 claims
- Methotrexate14 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.
Mario David Felix among 145 rheumatology physician records in Connecticut
Mario David Felix, MD is one of 145 rheumatology physician records with a practice address in Connecticut. 79% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2018, is newer than 92% of them.
- NPI issued2018 · 92% of these records are older, 7% newer
- In a Medicare fileYes · 79% of these records are
- In the CMS Doctors and Clinicians fileYes · 65% of these records are
- Graduated2018 · median 2004 among the 94 with a school on file
- Record last updated2025 · 65% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 207RR0500X and a Connecticut practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
Rheumatology Physician providers in Connecticut
There are 145 rheumatology physician records in Connecticut.
All 145 in Connecticut → Every provider in New Haven → Rheumatology Physician nationwide →
The 8 rheumatology physician records with the nearest ZIP codes
- Charles Disabatino, MDNew Haven, CT 065101457337644
- Evelyn Donroe, M.D., M.P.H.New Haven, CT 065101225204936
- Liana Fraenkel, MDNew Haven, CT 065101679556815
- Shivani Garg, M.D.New Haven, CT 065101528321122
- Betty Hsiao, M.D.New Haven, CT 065101699195016
- Lais Osmani, MDNew Haven, CT 065101932586062
- Amaad Rana, MDNew Haven, CT 065101366962417
- Marissa Sansone, M.D.New Haven, CT 065101063874063
Common questions
What is Mario David Felix, MD's NPI number?
Mario David Felix, MD's National Provider Identifier (NPI) is 1760986046, issued on Mar 21, 2018. An NPI identifies a provider in billing; it is not a license.
Where is Mario David Felix, MD located?
The NPPES record lists a practice address at 20 York St, New Haven, CT, 06510. Phone: (203) 688-4242. Providers update this record themselves, so call before visiting.
How can I verify Mario David Felix, MD's license?
NPPES lists Connecticut license number 80999, 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 Mario David Felix, MD prescribe under Medicare Part D?
In 2024, Mario David Felix, MD had 207 Medicare Part D claims for 36 beneficiaries; the average among rheumatology physician prescribers was 1,978. 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.