Ian Fernando Guillen Alvarez, MD
Internal Medicine Physician · Bridgeport, CT
Ian Fernando Guillen Alvarez, MD is an internal medicine physician with a practice address in Bridgeport, Connecticut, and NPI 1801465166, issued on Jun 22, 2021. Check the license (Connecticut 76275, as entered in NPPES) on the Connecticut Medical Examining Board; the Medicare figures below come from public CMS files.
- Name
- Ian Fernando Guillen Alvarez
- Credential
- MD
- Primary taxonomy
- Internal Medicine Physician 207R00000X
- License number
- 76275 CT
Self-reported in NPPES; status is on the state search - Practice location
- 2800 Main Street, Bridgeport, CT 06606
- Phone
- (475) 210-5791
- Enumerated
- Jun 22, 2021
- Record last updated
- Jun 12, 2024
- Fax
- (475) 210-5022
- Medicare enrollment
- Enrolled (PECOS I20240625000480); accepts Medicare assignment
- Entity
- Type 1 · individual
8 nearest internal medicine physician records → All 2,623 in Connecticut → Look up another NPI →
Also registered at 2800 Main Street
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Maheep Achanta, MBBSStudent in an Organized Health Care Education/Training Program1205623659
- Barbara AddiFamily Nurse Practitioner1730798406
- Nishob AdhikariStudent in an Organized Health Care Education/Training Program1619811619
- Amr AhmedStudent in an Organized Health Care Education/Training Program1427988955
- Oluwasegun Akinyelure, MDStudent in an Organized Health Care Education/Training Program1235923491
- Zaid Alkhananalka'Abneh, M.D.Student in an Organized Health Care Education/Training Program1740119312
Verify Ian Fernando Guillen Alvarez in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersConnecticut Medical Examining Board
Search for license 76275Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
89% fewer Medicare Part D claims than the average internal medicine physician in 2024
334 Medicare Part D claims for 108 beneficiaries, against an average of 3,176 among the 108,855 providers of this specialty who prescribed in Part D.
Most prescribed
- Amlodipine Besylate23 claims
- Furosemide18 claims
- Metoprolol Succinate18 claims
- Atorvastatin Calcium17 claims
- Lisinopril15 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.
Bills Medicare through one group practice
- Hartford Healthcare Medical Group Specialists PLLCBridgeport, CT
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Ian Fernando Guillen Alvarez among 2,623 internal medicine physician records in Connecticut
Ian Fernando Guillen Alvarez, MD is one of 2,623 internal medicine physician records with a practice address in Connecticut. 81% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2021, is newer than 91% of them.
- NPI issued2021 · 91% of these records are older, 5% newer
- In a Medicare fileYes · 81% of these records are
- In the CMS Doctors and Clinicians fileYes · 63% of these records are
- Graduated2017 · median 2004 among the 1,646 with a school on file
- Record last updated2024 · 61% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 207R00000X and a Connecticut practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
130 internal medicine physician records list a practice address in Bridgeport
They are 130 of the 2,980 NPPES records with a practice address in Bridgeport, and 2,623 internal medicine physician records in Connecticut.
All 2,623 in Connecticut → Every provider in Bridgeport → Internal Medicine Physician nationwide →
The 8 internal medicine physician records with the nearest ZIP codes
- Nalini Anand, M.D.Bridgeport, CT 066061649218363
- Michael Cavaliere, MDBridgeport, CT 066061194713339
- Anthony Ciccaglione, M.D.Bridgeport, CT 066061265435309
- Lisa Coplit, MDBridgeport, CT 066061194756791
- Santiago Escobar, M.D.Bridgeport, CT 066061558367920
- Forugh Homayounrooz, MDBridgeport, CT 066061346276912
- Syed HussainBridgeport, CT 066061144258377
- Adrian Klufas, MDBridgeport, CT 066061396731642
Common questions
What is Ian Fernando Guillen Alvarez, MD's NPI number?
Ian Fernando Guillen Alvarez, MD's National Provider Identifier (NPI) is 1801465166, issued on Jun 22, 2021. An NPI identifies a provider in billing; it is not a license.
Where is Ian Fernando Guillen Alvarez, MD located?
The NPPES record lists a practice address at 2800 Main Street, Bridgeport, CT, 06606. Phone: (475) 210-5791. Providers update this record themselves, so call before visiting.
How can I verify Ian Fernando Guillen Alvarez, MD's license?
NPPES lists Connecticut license number 76275, 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 Ian Fernando Guillen Alvarez, MD prescribe under Medicare Part D?
In 2024, Ian Fernando Guillen Alvarez, MD had 334 Medicare Part D claims for 108 beneficiaries; the average among internal medicine physician prescribers was 3,176. 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.