Freddy S. Calderon, M.D.
Nephrology Physician · Pasadena, CA
Freddy S. Calderon, M.D. is a nephrology physician with a practice address in Pasadena, California, and NPI 1932316338, issued on May 16, 2007. Check the license (California A96401, as entered in NPPES) on the Medical Board of California; the Medicare figures below come from public CMS files.
- Name
- Freddy S. Calderon
- Credential
- M.D.
- Primary taxonomy
- Nephrology Physician 207RN0300X
- License number
- A96401 CA
Self-reported in NPPES; status is on the state search - Practice location
- 393 E Walnut St, Pasadena, CA 91188
- Phone
- (626) 405-7914
- Enumerated
- May 16, 2007
- Record last updated
- Nov 29, 2021 (not updated in 5 years: call before relying on the address or phone)
- Entity
- Type 1 · individual
8 nearest nephrology physician records → All 1,468 in California → Look up another NPI →
Also registered at 393 E Walnut St
A shared address usually means a shared clinic or building; it does not show who employs whom.
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- Brian Apter, M.D.Hospitalist Physician1134418171
- Isabella AquinoMarriage & Family Therapist1700475167
- Annapoorani AsokanInternal Medicine Physician1750083960
- Rozely Barbero, DNP, CRNACertified Registered Nurse Anesthetist1184324097
- Leona Bell, RN CRNPPediatrics Physician1457342941
Verify Freddy S. Calderon in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMedical Board of California
Search for license A96401Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
52% fewer Medicare Part D claims than the average nephrology physician in 2024
699 Medicare Part D claims for 156 beneficiaries, against an average of 1,465 among the 10,986 providers of this specialty who prescribed in Part D.
Most prescribed
- Calcitriol59 claims
- Furosemide45 claims
- Amlodipine Besylate44 claims
- Cephalexin44 claims
- Fluconazole43 claims
- Losartan Potassium39 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.
Freddy S. Calderon among 1,468 nephrology physician records in California
Freddy S. Calderon, M.D. is one of 1,468 nephrology physician records with a practice address in California. 88% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2007, is newer than 52% of them.
- NPI issued2007 · 52% of these records are older, 35% newer
- In a Medicare fileYes · 88% of these records are
- In the CMS Doctors and Clinicians fileNo · 77% of these records are
- Record last updated2021 · 62% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 207RN0300X and a California practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
Nephrology Physician providers in California
There are 1,468 nephrology physician records in California.
All 1,468 in California → Every provider in Pasadena → Nephrology Physician nationwide →
The 8 nephrology physician records with the nearest ZIP codes
- Raffi Minasian, MDGlendale, CA 912041306860465
- Artashes Patrikyan, MDGlendale, CA 912041972624591
- Michel Zakari, M.D.Glendale, CA 912041750361093
- Duc Bui, M.D.Glendale, CA 912051831170950
- Dariush Arfaania, M.D.Glendale, CA 912061265543755
- Sarbani Bhaduri, M.D.Glendale, CA 912061174716765
- Sam Daneshvari, M.D.Glendale, CA 912061851496145
- Coreen Huo, DOGlendale, CA 912061932626553
Common questions
What is Freddy S. Calderon, M.D.'s NPI number?
Freddy S. Calderon, M.D.'s National Provider Identifier (NPI) is 1932316338, issued on May 16, 2007. An NPI identifies a provider in billing; it is not a license.
Where is Freddy S. Calderon, M.D. located?
The NPPES record lists a practice address at 393 E Walnut St, Pasadena, CA, 91188. Phone: (626) 405-7914. Providers update this record themselves, so call before visiting.
How can I verify Freddy S. Calderon, M.D.'s license?
NPPES lists California license number A96401, as entered by the provider. Search the Medical Board of California at https://www.mbc.ca.gov/License-Verification/default.aspx. The NPPES record confirms identity only; the state search shows license status, expiration and public orders.
How much does Freddy S. Calderon, M.D. prescribe under Medicare Part D?
In 2024, Freddy S. Calderon, M.D. had 699 Medicare Part D claims for 156 beneficiaries; the average among nephrology physician prescribers was 1,465. 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.