Stefano Azelio Iantorno, MD, PHD
Critical Care Medicine (Internal Medicine) Physician · San Francisco, CA
Stefano Azelio Iantorno, MD, PHD is a critical care medicine (internal medicine) physician with a practice address in San Francisco, California, and NPI 1952860900, issued on Mar 19, 2019. Check the license (California A177369, as entered in NPPES) on the Medical Board of California; the Medicare figures below come from public CMS files.
- Name
- Stefano Azelio Iantorno
- Credential
- MD, PHD
- Primary taxonomy
- Critical Care Medicine (Internal Medicine) Physician 207RC0200X
- License number
- A177369 CA
Self-reported in NPPES; status is on the state search - Practice location
- 505 Parnassus Ave, San Francisco, CA 94143
- Phone
- (415) 476-1000
- Enumerated
- Mar 19, 2019
- Record last updated
- Feb 27, 2024
- Medicare enrollment
- Enrolled (PECOS I20250630000673); may accept Medicare assignment
- Medical or professional school
- Columbia University College Of Physicians And Surgeons, 2019
- Entity
- Type 1 · individual
8 nearest critical care medicine (internal medicine) physician records → All 723 in California → Look up another NPI →
Also registered at 505 Parnassus Ave
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Alexander Aabedi, MDStudent in an Organized Health Care Education/Training Program1245971480
- Kathryn Aaronson, RN, CPNPPediatric Nurse Practitioner1992030951
- Sharon AbadaStudent in an Organized Health Care Education/Training Program1003492844
- Abul Abbas, MBBSAnatomic Pathology Physician1881652964
- Jesse Abelson, MDInternal Medicine Physician1083843817
- Rhonald AbitonaAcute Care Nurse Practitioner1164993473
Verify Stefano Azelio Iantorno in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMedical Board of California
Search for license A177369Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
96% fewer Medicare Part D claims than the average critical care medicine (internal medicine) physician in 2024
30 Medicare Part D claims for 14 beneficiaries, against an average of 696 among the 2,873 providers of this specialty who prescribed in Part D. Brand-name drugs were 70% of 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.
Stefano Azelio Iantorno among 723 critical care medicine (internal medicine) physician records in California
Stefano Azelio Iantorno, MD, PHD is one of 723 critical care medicine (internal medicine) physician records with a practice address in California. 87% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2019, is newer than 94% of them.
- NPI issued2019 · 94% of these records are older, 3% newer
- In a Medicare fileYes · 87% of these records are
- In the CMS Doctors and Clinicians fileYes · 77% of these records are
- Graduated2019 · median 2005 among the 559 with a school on file
- Record last updated2024 · 50% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 207RC0200X and a California practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
Critical Care Medicine (Internal Medicine) Physician providers in California
There are 723 critical care medicine (internal medicine) physician records in California.
All 723 in California → Every provider in San Francisco → Critical Care Medicine (Internal Medicine) Physician nationwide →
The 8 critical care medicine (internal medicine) physician records with the nearest ZIP codes
- Christopher Barnett, MD, MPHSan Francisco, CA 941431538127717
- Sudhamayi Bhadriraju, M.D.San Francisco, CA 941431104116243
- Mallar Bhattacharya, MDSan Francisco, CA 941431063558757
- Samuel Brusca, M.D.San Francisco, CA 941431174942148
- Jonathan BudzikSan Francisco, CA 941431356632632
- Harold Collard, MDSan Francisco, CA 941431740245380
- Kenneth Fang, M.D.San Francisco, CA 941431760566020
- Yaron Gesthalter, MDSan Francisco, CA 941431013183599
Common questions
What is Stefano Azelio Iantorno, MD, PHD's NPI number?
Stefano Azelio Iantorno, MD, PHD's National Provider Identifier (NPI) is 1952860900, issued on Mar 19, 2019. An NPI identifies a provider in billing; it is not a license.
Where is Stefano Azelio Iantorno, MD, PHD located?
The NPPES record lists a practice address at 505 Parnassus Ave, San Francisco, CA, 94143. Phone: (415) 476-1000. Providers update this record themselves, so call before visiting.
How can I verify Stefano Azelio Iantorno, MD, PHD's license?
NPPES lists California license number A177369, 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 Stefano Azelio Iantorno, MD, PHD prescribe under Medicare Part D?
In 2024, Stefano Azelio Iantorno, MD, PHD had 30 Medicare Part D claims for 14 beneficiaries; the average among critical care medicine (internal medicine) physician prescribers was 696. 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.