Michael Warren Fitzgibbons, MD
Infectious Disease Physician · Santa Ana, CA
Michael Warren Fitzgibbons, MD is an infectious disease physician with a practice address in Santa Ana, California, and NPI 1194727859, issued on Aug 12, 2005. Check the license (California G34615, as entered in NPPES) on the Medical Board of California; the Medicare figures below come from public CMS files.
- Name
- Michael Warren Fitzgibbons
- Credential
- MD
- Primary taxonomy
- Infectious Disease Physician 207RI0200X
- License number
- G34615 CA
Self-reported in NPPES; status is on the state search - Practice location
- 1913 E 17TH St, Santa Ana, CA 92705
- Phone
- (714) 541-3744
- Enumerated
- Aug 12, 2005
- Record last updated
- Apr 1, 2013 (not updated in 13 years: call before relying on the address or phone)
- Fax
- (714) 541-4680
- Medicare enrollment
- Enrolled (PECOS I20121108000318); accepts Medicare assignment
- Medical or professional school
- Georgetown University School Of Medicine, 1976
- Telehealth
- Offers telehealth (CMS)
- Entity
- Type 1 · individual
Also registered at 1913 E 17TH St
A shared address usually means a shared clinic or building; it does not show who employs whom.
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Verify Michael Warren Fitzgibbons in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMedical Board of California
Search for license G34615Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
48% fewer Medicare Part D claims than the average infectious disease physician in 2024
358 Medicare Part D claims for 63 beneficiaries, against an average of 689 among the 7,388 providers of this specialty who prescribed in Part D.
Most prescribed
- Biktarvy23 claims
- Amoxicillin-Clavulanate Potass17 claims
- Fluconazole16 claims
- Juluca12 claims
- Sulfamethoxazole-Trimethoprim11 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.
Industry payments in 2024: $431.10
6 payments; by number, the most common kind was food and beverage; the largest payer was Gilead Sciences, Inc. The 3,895 providers of this specialty with any payment received $4,362.19 on average. Payments are reported by manufacturers, not by the provider, and are not a sign of wrongdoing.
Source: CMS Open Payments, program year 2024 (openpaymentsdata.cms.gov); average among providers of this specialty with at least one payment.
Infectious Disease Physician providers in California
There are 1,119 infectious disease physician records in California.
Other infectious disease physician records in California
- Sanaz Abderrahmane, M.D.Sacramento, CA1902039902
- Shira Abeles, M.D.San Diego, CA1720240625
- Igor Abolnik, MDRureka, CA1194783829
- Firas Abubaker, MDCorona, CA1346255254
- Nehkonti Adams, M.D.San Diego, CA1194985705
- Paul Adamson, MD, MPHLos Angeles, CA1639558455
- Alina Adeel, M.DLa Jolla, CA1831453596
- Oladunni Adeyiga, MDLos Angeles, CA1801809751
- Jacqueline Adler, M.D.West Hills, CA1326094582
- Dipti Agrawal, MDPalo Alto, CA1437137189
Common questions
What is Michael Warren Fitzgibbons, MD's NPI number?
Michael Warren Fitzgibbons, MD's National Provider Identifier (NPI) is 1194727859, issued on Aug 12, 2005. An NPI identifies a provider in billing; it is not a license.
Where is Michael Warren Fitzgibbons, MD located?
The NPPES record lists a practice address at 1913 E 17TH St, Santa Ana, CA, 92705. Phone: (714) 541-3744. Providers update this record themselves, so call before visiting.
How can I verify Michael Warren Fitzgibbons, MD's license?
NPPES lists California license number G34615, 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 Michael Warren Fitzgibbons, MD prescribe under Medicare Part D?
In 2024, Michael Warren Fitzgibbons, MD had 358 Medicare Part D claims for 63 beneficiaries; the average among infectious disease physician prescribers was 689. 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.