Registry data as of Aug 27, 2026

Alexander Alonso, M.D.

Nephrology Physician · Peoria, IL

Alexander Alonso, M.D. is a nephrology physician with a practice address in Peoria, Illinois, and NPI 1124152707, issued on Mar 15, 2007. Check the license (Illinois 036115179, as entered in NPPES) on the Illinois Department of Financial and Professional Regulation; the Medicare figures below come from public CMS files.

Record from CMS NPPES, loaded Aug 27, 2026 · Medicare files 2023 and 2024 · method · Verify with CMS →

NPPES recordas of Aug 27, 2026
1124152707
Name
Alexander Alonso
Credential
M.D.
Primary taxonomy
Nephrology Physician 207RN0300X
License number
036115179 IL
Self-reported in NPPES; status is on the state search
Practice location
420 NE Glen Oak Ave Ste 401, Peoria, IL 61603
Phone
(309) 676-8123
Enumerated
Mar 15, 2007
Entity
Type 1 · individual
Public record from CMS NPPES (open it on the CMS NPI Registry). A record is not a license: verify it with the state board.
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Also registered at 420 NE Glen Oak Ave Ste 401

A shared address usually means a shared clinic or building; it does not show who employs whom.

  1. Stepan Akshelyan, MDTransplant Surgery Physician1942846316
  2. Sudha Cherukuri, MDNephrology Physician1629126222
  3. Judith Dansizen, CNSNurse Practitioner1558493155
  4. Michelle DehneNurse Practitioner1962994707
  5. Chaitanya Desai, M.D.Nephrology Physician1508090234
  6. Kathryn Gensel, NPPediatric Nurse Practitioner1699740902

Verify Alexander Alonso in five checks

  1. 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
  2. 2LicenseActive license and public ordersIllinois Department of Financial and Professional Regulation
    Search for license 036115179    Check the board
  3. 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
  4. 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
  5. 5CertificationBoard certificationABMS, AOA, NCCPA, AANPNot checked
Open the Illinois license search

PlainDoctor does not match the HHS-OIG exclusion list to individual records: most entries carry no NPI. Search the OIG exclusion list by name.

2.5 times the Medicare Part D claims of the average nephrology physician in 2024

3,830 Medicare Part D claims for 546 beneficiaries, against an average of 1,511 among the 8,473 providers of this specialty who prescribed in Part D. Brand-name drugs were 18% of claims.

  1. Alexander Alonso3,830
  2. Specialty average1,511

Most prescribed

  1. Jardiance534 claims
  2. Calcitriol384 claims
  3. Losartan Potassium374 claims
  4. Allopurinol217 claims
  5. Amlodipine Besylate215 claims
  6. Lisinopril215 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.

One hospital or facility affiliation

  1. Renalcare Associates, S.C.Washington, IL

Source: CMS Doctors and Clinicians affiliations; Hospital General Information (Care Compare) (data.cms.gov). Star ratings are CMS hospital ratings, not ratings of this provider.

Nephrology Physician providers in Illinois

There are 463 nephrology physician records in Illinois.

All 463 in Illinois → Every provider in Peoria →

Other nephrology physician records in Illinois

  1. Momen Abbasi, M.D.Chicago, IL1184472268
  2. Pabitra Adhikari, MDChicago, IL1427629740
  3. Bhavani Adusumilli, MDSpringfield, IL1568792604
  4. Nidhi Aggarwal, M.D.Chicago, IL1740368208
  5. Vikram Aggarwal, M.DChicago, IL1316235583
  6. Akansha Agrawal, MDChicago, IL1396280905
  7. Fayzan Ahmad, MDChicago, IL1376005835
  8. Mashood Ahmad, MDRockford, IL1043232846
  9. Sarmad Ahmad, DOChicago, IL1952979775
  10. Naila Ahmed, MDJoliet, IL1447368949

Common questions

What is Alexander Alonso, M.D.'s NPI number?

Alexander Alonso, M.D.'s National Provider Identifier (NPI) is 1124152707, issued on Mar 15, 2007. An NPI identifies a provider in billing; it is not a license.

Where is Alexander Alonso, M.D. located?

The NPPES record lists a practice address at 420 NE Glen Oak Ave Ste 401, Peoria, IL, 61603. Phone: (309) 676-8123. Providers update this record themselves, so call before visiting.

How can I verify Alexander Alonso, M.D.'s license?

NPPES lists Illinois license number 036115179, as entered by the provider. Search the Illinois Department of Financial and Professional Regulation at https://idfpr.illinois.gov/checklicense.html. The NPPES record confirms identity only; the state search shows license status, expiration and public orders.

How much does Alexander Alonso, M.D. prescribe under Medicare Part D?

In 2024, Alexander Alonso, M.D. had 3,830 Medicare Part D claims for 546 beneficiaries; the average among nephrology physician prescribers was 1,511. Part D covers Medicare prescriptions only.

Source: CMS National Plan and Provider Enumeration System (NPPES), loaded Aug 27, 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.

Compiled from official public sources by the editorial process.

Every figure on PlainDoctor is rendered directly from the federal CMS NPPES registry, Medicare Part D, MIPS, and Open Payments records, no number is typed in by an editor. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error. Data current as of Aug 27, 2026.