NPI registry status
Active
2026 NPPES data Infectious Disease Physician NPI 1194727859 MD
Verify on CMS → Michael Fitzgibbons, MD
Infectious Disease Physician in Santa Ana, California.
This profile is drawn from the federal National Provider Identifier Registry (CMS NPPES), which lists more than 7 million U.S. healthcare providers - including 8,292 in Infectious Disease Physician, and covers specialty classification, practice address, and Medicare Part D prescribing data when reported. According to CMS, every field reflects the provider's official federal registration, see our methodology.
Federal data, no proprietary rating.
We show these CMS records as-is - no composite score, no star rating, no editorial opinion layered on top.
Prescribing volume
389
Medicare Part D claims · 60 beneficiaries · Infectious Disease Physician avg: 816
Generic prescribing
71%
generic claims · 26% brand-name · higher generic rates reduce patient out-of-pocket costs
Industry payments
$431.1
6 payments · CMS Open Payments (Sunshine Act)
Source: CMS Medicare Part D Prescriber Public Use File, 2023
Compiled from official public sources by the PlainDoctor editorial team.
What the federal data shows
Michael Fitzgibbons, MD filed 389 Medicare Part D claims in 2023 as a Infectious Disease Physician in Santa Ana, California, prescribing 71% generic.
- 389
- Part D claims, 2023
- 71%
- generic prescribing
- $431.1
- industry payments (Sunshine Act)
Every figure on this page comes straight from federal CMS records (NPPES, Medicare Part D, MIPS, Open Payments) - no proprietary rating or editorial opinion is applied.
Michael Fitzgibbons, MD's Medicare Part D volume vs every U.S. prescriber
Total Medicare Part D claims, 2023, across all CMS prescribers nationally
389 Top 43% higher than 57% of 1,370,886 prescribers
Each bar is a band; taller bars hold more prescribers. The dashed line + filled bar mark this entry. Hover or tap any bar for its full count, share, and where it sits relative to this entry.
Source CMS Medicare Part D Prescriber Public Use File · 2023
◑
Board-eligible specialty (heuristic, not verified)
Michael Fitzgibbons, MD practices in an ABMS-board-eligible specialty but we don't have enough CMS-participation signals to confirm active board-certified status. Consult CertificationMatters.org (the official ABMS public lookup).
What does the federal data show about Michael Fitzgibbons, MD?
Quality data not reportedPrimary specialty
Infectious Disease Physician
Medicare Part D claims
389 52% vs specialty avg
Specialty distribution in California
How Infectious Disease Physician compares to other specialties among California providers
Board certification
Not published by CMS
CMS does not publish a per-provider board-certification field in NPPES. PlainDoctor does not have a reliable per-specialty certification rate to show for Infectious Disease Physician. Verify directly:
How MIPS and board certification work
The Merit-based Incentive Payment System (MIPS) scores providers 0–100 across four performance categories: Quality, Cost, Promoting Interoperability, and Improvement Activities, weighted under 42 CFR §414.1380. Reporting is voluntary for many small practices, so absence of a MIPS score is not a quality signal.
Board certification through an ABMS or AOA member board signals voluntary post-licensure examination plus continuous Maintenance of Certification cycles. Verify any individual provider's status through certificationmatters.org (ABMS) or osteopathic.org (AOA).
Michael Fitzgibbons, MD appears in the CMS NPPES registry as a Infectious Disease Physician provider holding MD credentials at 1913 E 17TH ST, Santa Ana, CA, 92705, with a listed phone of (714) 541-3744. NPI 1194727859 was issued on 08/12/2005.
Medicare Part D records for calendar year 2023 show 389 prescription claims written by this provider, covering 60 Medicare beneficiaries and totaling roughly $231K in drug spend, split 26% brand-name and 71% generic by claim count.
Infectious Disease Physician is a mid-sized specialty nationwide, with 8,292 enrolled providers across 54 states and an average of 816 Part D claims per prescriber, so the context for interpreting these metrics differs meaningfully from a primary-care baseline.
Important: PlainDoctor is a directory of publicly available government data, not medical advice, a malpractice database, or a quality rating. Inclusion here does not imply a recommendation, and absence of complaints or sanctions on this page does not mean none exist, always verify credentials through the NPPES NPI Registry, your state medical board, and the ABMS or AOA before making healthcare decisions.
Practice Address
Provider Details
| NPI | 1194727859 |
|---|---|
| Specialty | Infectious Disease Physician |
| Credentials | MD |
| Gender | Male |
| NPI Issued | 08/12/2005 |
Industry payments received (2024) - CMS Open Payments transparency data
The federal Physician Payments Sunshine Act (part of the Affordable Care Act) requires drug and medical-device manufacturers + group purchasing organizations to publicly report payments and other transfers of value to physicians and teaching hospitals. The data below covers 2024 for Michael Fitzgibbons, MD. Source: openpaymentsdata.cms.gov.
Total received
$431
Largest payer
Gilead Sciences, Inc.
Most common payment type
Food and Beverage
Industry payments are not necessarily indicators of bias, they include research funding, consulting fees for evidence-based work, royalties for inventions, food at conferences, and similar items. The disclosure exists for transparency. Read our methodology for how we interpret this data.
License & disciplinary context - California MBC 2023 annual report
Aggregate state board data only, NOT a determination of any individual provider's status. The figures below describe statewide disciplinary activity across all ~150K California medical licensees in 2023 - they are NOT specific to Michael Fitzgibbons, MD. To verify Michael Fitzgibbons, MD's current license status, search the MBC public license lookup directly, or check the Federation of State Medical Boards (FSMB) verification service.
576
Total board actions, California 2023
Across 556 cases
3.84
Actions per 1,000 licensees
California statewide rate
probation
Most common action type
186 cases
MBC publishes annual disciplinary statistics as part of public-record reporting under each state's Administrative Procedure Act. See the full breakdown by action type and year on the California disciplinary trends page. Cross-checked against FSMB U.S. Medical Regulatory Trends.
Brand vs generic prescribing mix · Above average
Michael Fitzgibbons, MD - brand share 26.0%
Infectious Disease Physician average
26% brand-name claims vs 71% generic, on 389 2023 Medicare Part D claims.
The federal Medicare Part D Generic Dispensing Rate national benchmark sits near 90% generic / 10% brand for primary-care prescribers, per CMS Office of the Actuary 2024 estimates. Higher brand share is common in specialty prescribing where generic equivalents are not available.
Medicare Part D Prescribing Data
CMS Medicare Part D prescriber-level data for calendar year 2023.
389
Total Claims
$231K
Total Drug Cost
60
Medicare Beneficiaries
Prescribing Breakdown
- 30-Day Fills
- 520
- Total Day Supply
- 13,819
- Brand vs Generic
- 26% brand / 71% generic
- Brand Drug Cost
- $222K
- Generic Drug Cost
- $9K
- Antibiotic Claims
- 68
Patient Demographics
- Average Patient Age
- 72.6 years
- Avg HCC Risk Score
- 1.71
- Gender Split
- 42% female / 58% male
Top Prescribed Drugs (Medicare Part D)
Top drugs by claim count for calendar year 2023. Based on Medicare Part D data only.
What Michael Fitzgibbons, MD prescribes most
Top Medicare Part D drugs by claim count, 2023
- Biktarvy
Biktarvy
24 claims
- Amlodipine Besylate
Amlodipine Besylate
18 claims
- Eliquis
Eliquis
15 claims
- Gabapentin
Gabapentin
15 claims
- Famotidine
Famotidine
14 claims
- Juluca
Juluca
12 claims
- Azithromycin
Azithromycin
11 claims
- Cefuroxime
Cefuroxime
11 claims
| Drug | Claims |
|---|---|
| Biktarvy Bictegrav/Emtricit/Tenofov Ala | 24 |
| Amlodipine Besylate | 18 |
| Eliquis Apixaban | 15 |
| Gabapentin | 15 |
| Famotidine | 14 |
| Juluca Dolutegravir/Rilpivirine | 12 |
| Azithromycin | 11 |
| Cefuroxime Cefuroxime Axetil | 11 |
| Loperamide Loperamide Hcl | 11 |
| Venlafaxine Hcl Er Venlafaxine Hcl | 11 |
* Counts below 11 are suppressed by CMS for patient privacy. Generic names shown where available from CMS Part D data.
Infectious Disease Physician Overview
How Michael Fitzgibbons, MD fits within the Infectious Disease Physician landscape nationally.
8,292
Infectious Disease Physician Providers in US
54
States with Infectious Disease Physician
816
Avg Claims per Provider
Michael Fitzgibbons, MD's 389 claims are below the specialty average of 816.
Nearby Infectious Disease Physician Providers in California
Other clinicians with the same primary specialty enrolled in California, drawn from the same CMS NPPES roster as Fitzgibbons.
Dr. Sanaz Abderrahmane
M.D.
Sacramento, CA
Dr. Glen Abergel
M.D.
Oxnard, CA
Dr. Igor Abolnik
MD
Rureka, CA
Dr. Nehkonti Adams
M.D.
San Diego, CA
Dr. Alina Adeel
M.D
La Jolla, CA
Compare Infectious Disease Physician nationally: see state-by-state distribution →
Before you book an appointment
Use this federal record as your verification checklist, not as a recommendation.
- Confirm the NPI record is current in the official CMS registry, providers update their own NPPES details, and moves can lag. Verify this NPI
- Check the active license and any disciplinary history with the California medical board, federal registration is not a license check. Credential verification guide
- Weigh a second option: compare this provider with a nearby Infectious Disease Physician peer on Medicare volume and prescribing patterns. Compare providers
Medicare Part D and MIPS figures describe practice patterns in federal programs only, they are not quality ratings, and PlainDoctor does not rate, rank, or recommend providers.
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Frequently Asked Questions
What is Michael Fitzgibbons, MD's specialty? ▼
Michael Fitzgibbons, MD specializes in Infectious Disease Physician and practices in Santa Ana, California. Credentials: MD.
How much does Michael Fitzgibbons, MD prescribe under Medicare Part D? ▼
In 2023, Michael Fitzgibbons, MD wrote 389 Medicare Part D claims totaling $231K in drug costs for 60 beneficiaries.
Where is Michael Fitzgibbons, MD located? ▼
Michael Fitzgibbons, MD is located at 1913 E 17TH ST, Santa Ana, CA, 92705. Phone: (714) 541-3744.
What is Michael Fitzgibbons, MD's NPI number? ▼
Michael Fitzgibbons, MD's National Provider Identifier (NPI) is 1194727859, issued on 08/12/2005.
Does Michael Fitzgibbons, MD prescribe more brand-name or generic drugs? ▼
Michael Fitzgibbons, MD's prescribing is 26% brand-name and 71% generic drugs by claim count, with $222K in brand drug costs.
How many Infectious Disease Physician providers are there in the US? ▼
There are 8,292 Infectious Disease Physician providers across 54 states in the US. The average Infectious Disease Physician provider writes 816 Medicare Part D claims per year.
What drugs does Michael Fitzgibbons, MD prescribe most often? ▼
Based on 2023 Medicare Part D data, Michael Fitzgibbons, MD's most frequently prescribed drugs include Biktarvy, Amlodipine Besylate, Eliquis. This reflects Medicare Part D prescriptions only and does not include commercial insurance or other payer types.
Does Michael Fitzgibbons, MD accept Medicare? ▼
Michael Fitzgibbons, MD appears in CMS Medicare data with 389 Part D claims and 60 Medicare beneficiaries in 2023. Contact the provider's office directly to confirm current Medicare enrollment and accepted plans.
How can I verify Michael Fitzgibbons, MD's credentials? ▼
Michael Fitzgibbons, MD's NPI is 1194727859 with credentials MD. You can verify this through the NPPES NPI Registry, check state medical board records, and confirm board certification through the ABMS or AOA.
Data Sources
View source datasets and methodology notes
- Provider Directory
- CMS National Plan and Provider Enumeration System (NPPES), download.cms.gov/nppes, updated monthly. Contains NPI, specialty, credentials, and practice location.
- Specialty Classification
- NUCC Health Care Provider Taxonomy (nucc.org), the industry standard for classifying provider specialties in Medicare and Medicaid billing.
- Prescribing Data
- CMS Medicare Part D Prescriber Public Use File (2023). Includes claims, drug costs, beneficiaries, and opioid prescribing rates.
- Limitations
- Provider data is self-reported to CMS. Prescribing data reflects Medicare Part D only and does not include commercial insurance, Medicaid, or cash prescriptions. Claims below 11 beneficiaries are suppressed by CMS for privacy.
See our complete data methodology for details on how we collect and process government data.
Data as of April 2026 (NPPES) / 2023 (Medicare Part D). Source: Centers for Medicare & Medicaid Services (CMS).
Disclaimer: Data from CMS NPPES and Medicare Part D. PlainDoctor does not rate or rank providers. Provider information is self-reported and may not be current. Always verify information directly with the provider. About · Methodology
Compiled from official public sources by the PlainDoctor editorial team.