Dr. Aaron B. Fowler, MD
- Medicare services, 2024
- 238
- Medicare patients, 2024
- 139
- Part D claims, 2024
- 18
- Publications
- 2
- Hospital affiliations
- 4
- Practice address
- 1100 West Stewart Dr, Orange, CA 92868
- Practice phone
- Call (714) 633-9111
- Professional email
- Get professional email
- Personal email
- Get personal email
- Mobile number
- Get mobile number
Primary practice
Find Dr. Fowler's professional email, personal email and mobile number
Dmand AI checks each channel through healthcare-specific waterfall enrichment. See what is on file with a free account, with practice phones, licenses and affiliations.
Dr. Aaron B. Fowler is a cardiothoracic surgeon in Orange, California
Dr. Fowler practices at Providence St. Joseph Hospital Orange in Orange, California, part of Providence Health & Services.
Dr. Fowler's NPI, 1346582053, was assigned on March 20, 2013. Dr. Fowler graduated from Spencer Fox Eccles School of Medicine in 2013. Dr. Fowler holds California license A136191.
- NPI
- 1346582053NPI Registry (opens in a new tab)
- Medicare PAC ID
- 5092136960
- NPI enumeration date
- March 20, 2013
- NPI status
- Active
- Accepts Medicare assignment
- Yes
- Practice phone
- (714) 633-9111
- Professional email
- Get email
- Personal email
- Get email
- Mobile number
- Get number
- Sex
- Male
- Estimated age
- 39
- Medical school graduation
- 2013
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; Dmand AI Affiliation Data; and Doctors and Clinicians National Downloadable File (CMS)
Dr. Aaron B. Fowler practices at Providence St. Joseph Hospital Orange in Orange, California
Dr. Fowler's primary practice is Providence St. Joseph Hospital Orange, at 1100 West Stewart Dr, Orange, CA 92868 in Orange County. The practice phone is (714) 633-9111.
- Providence St. Joseph Hospital Orange1100 West Stewart Dr, Orange, CA 92868 · Orange CountyPhone(714) 633-9111
Source: Dmand AI Affiliation Data
Dr. Aaron B. Fowler is affiliated with 7 sites of care and 3 medical groups
Dr. Fowler's primary practice is Providence St. Joseph Hospital Orange in Orange, California, part of Providence Health & Services. Dr. Fowler is also affiliated with Providence Mission Hospital. The medical group on file is Orange County Thoracic and Cardiovascular Surgeons. Dmand AI also links Dr. Fowler to 2 more hospitals, 3 group practices and clinics and 2 medical groups, each named with a free account.
Sources: Dmand AI Affiliation Data; and Dmand AI Org Hierarchy Data
Dmand AI tracks the EHR system at Dr. Aaron B. Fowler's practice
Dmand AI tracks the electronic health record (EHR) system at each site where Dr. Fowler practices, 7 sites in all. Vendor and product names are available with a free account.
| Site | EHR vendor and product |
|---|---|
| Providence St. Joseph Hospital Orange | Available with a free account |
| +6 more sites and 2 medical groups | Available with a free account |
Source: Dmand AI Technology Install Data
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Dr. Aaron B. Fowler is one of 568 cardiothoracic surgeons in California
Thoracic surgery (cardiothoracic vascular surgery) is Dr. Fowler's primary specialty in the NPI Registry, under taxonomy code 208G00000X. Dr. Fowler is board certified in thoracic and cardiac surgery by the American Board of Thoracic Surgery. Dmand AI has Dr. Fowler's licenses on file in 5 states: California, Montana, Ohio, New Jersey and Utah.
Specialties and state licenses
- Thoracic surgery (cardiothoracic vascular surgery), CaliforniaPrimary
- Montana license
- Ohio license
- New Jersey license
- Utah license
Clinical focus
Dmand AI lists heart bypass surgery and heart valve surgery among the conditions Dr. Fowler treats.
Cardiothoracic surgeons near Dr. Fowler
Counts of cardiothoracic surgeons with a Dmand AI profile, by place and practice. Each opens the list.
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; and Dmand AI Peer Benchmarks
Dr. Aaron B. Fowler billed Medicare for 238 services in 2024
CMS data shows 238 Medicare services from Dr. Fowler across 9 procedure codes in 2024, for 139 Medicare patients. Medicare paid $61,815 for them.
Dr. Fowler's Medicare services by type, 2023 to 2024
- 2023
- 2024
- Surgery
- 2023: 732024: 13484%
- Office and hospital visits
- 2023: 502024: 8264%
- Imaging
- 2023: 212024: 225%
Where Dr. Fowler's Medicare services took place, 2024
- In an office4720%
- In a facility19180%
Dr. Fowler compared with the California median for cardiothoracic surgeons, 2024
- Dr. Fowler
- California median
- Medicare services
- 238vs 1142.1 times
- Medicare patients
- 139vs 9546% above
- Part D claims
- 44vs 192.3 times
Medians across 453 cardiothoracic surgeons in California with Dmand AI profiles that report each measure.
Dr. Fowler's most billed Medicare procedure codes, 2024
CMS publishes codes billed for 11 or more Medicare patients. Each label is the code family; CPT descriptions are licensed by the AMA.
Need commercial claims for Dr. Fowler?
Medicare shows one payer. Book a meeting to get commercial claims data for Dr. Fowler and other cardiothoracic surgeons in California.
Sources: Medicare Physician & Other Practitioners - by Provider and Service (CMS), 2024 data; and Dmand AI Peer Benchmarks
Dr. Aaron B. Fowler treated 139 Medicare patients in 2024, average age 77
CMS counts 139 Medicare patients who saw Dr. Fowler in 2024. The largest group is 75 to 84, with 66 patients. 75% of them have heart failure, and 75% have high blood pressure. 24% are also on Medicaid. Their average risk score is 2.59, where 1.00 is the Medicare average, so they are sicker than most Medicare patients.
Across all payers, Dmand AI patient panel data puts Dr. Fowler's median patient age at 70, with 36% women.
Dr. Fowler's Medicare patients by age, 2024
CMS leaves out age groups with fewer than 11 patients.
Dr. Fowler's Medicare patients by sex, 2024
- Women4935%
- Men9065%
Chronic conditions among Dr. Fowler's Medicare patients, 2024
- Heart failure75%
- High blood pressure75%
- High cholesterol75%
- Ischemic heart disease75%
- Atrial fibrillation60%
- Arthritis52%
- Chronic kidney disease48%
- Diabetes45%
Share of Medicare patients with each condition. A patient can have several.
Dr. Fowler's patients across all payers
Dmand AI patient panel data covers Medicare, Medicaid and commercial patients.
Patient panel by age, all payers
Median age 70
Patient panel by sex, all payers
- Women36%
- Men63%
Sources: Dmand AI Patient Panel Data; and Medicare Physician & Other Practitioners - by Provider (CMS), 2024 data
Dr. Aaron B. Fowler wrote 18 Medicare Part D claims in 2024
In 2024, Dr. Fowler wrote 18 Medicare Part D claims. 100% of them were for generic drugs. They cover 2 drugs, with $379 in total drug cost. In 2016, CMS named 34 claims across 2 drugs.
Dr. Fowler's most prescribed drugs by claims, 2017
CMS names a drug when it has 11 or more claims. Share is of the claims for drugs CMS names.
Part D claims for drugs CMS names, 2016 to 2017
- 2016
- 2017
- Claims for drugs CMS names
- 2016: 342017: 4429%
Drugs named by CMS: 2 in 2017, 2 in 2016.
Sources: Medicare Part D Prescribers - by Provider and Drug (CMS), 2024 data, released May 6, 2026; and Medicare Part D Prescribers - by Provider (CMS), 2024 data
Dr. Aaron B. Fowler ranks in the 81st percentile for coronary artery bypass graft (cabg) in Medicare
Dr. Fowler accepts Medicare assignment, so Medicare's approved amount is taken as full payment. CMS counts 28 procedures of coronary artery bypass graft (cabg) by Dr. Fowler, more than 81% of the clinicians it reports for that procedure.
- Accepts Medicare assignment
- Yes
Where Dr. Fowler ranks in Medicare procedure volume
- Coronary artery bypass graft (CABG)
- 81st percentile28 procedures
CMS ranks each clinician against every clinician it reports for the same procedure category.
Sources: Doctors and Clinicians National Downloadable File (CMS); and Doctors and Clinicians Utilization Data (CMS)
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Dr. Aaron B. Fowler has 2 publications on record
Dmand AI links 2 papers to Dr. Fowler. Dr. Fowler's most frequent co-authors are Aamna Ali, MD, Mohammed Hassan Al-Temimi, MD and Hannah Copeland, MD.
Dr. Fowler's most frequent co-authors
- Aamna Ali, MD1 shared paper
- Mohammed Hassan Al-Temimi, MD1 shared paper
- Hannah Copeland, MD1 shared paper
Recent publications by Dr. Fowler
See who Dr. Fowler researches with
Physician Network Discovery turns co-authorship, shared hospitals and shared groups into a map of who Dr. Fowler works with, so you can find a warm path to the right cardiothoracic surgeons.
Sources: PubMed (National Library of Medicine); and Dmand AI Research Linkage
Dr. Aaron B. Fowler received $38,307 in industry payments from 2018 to 2025
CMS Open Payments shows 440 general payments to Dr. Fowler from 28 drug and device companies from 2018 to 2025. Food and beverage make up the largest share, 63% of the total. Edwards Lifesciences Corporation paid the most, $14,161.
General payments to Dr. Fowler by program year, 2018 to 2025
General payments to Dr. Fowler by kind, 2018 to 2025
- Food and beverage$24,18063%
- Travel and lodging$11,37730%
- Consulting fees$2,7507%
Companies that paid Dr. Fowler the most, 2018 to 2025
Share is of all general payments to this clinician.
Source: Open Payments (CMS), 2025 data, released July 7, 2026
Dr. Aaron B. Fowler graduated from Spencer Fox Eccles School of Medicine
Dr. Fowler graduated from Spencer Fox Eccles School of Medicine in 2013.
- Medical school
- Board certified in thoracic and cardiac surgery
Source: Dmand AI Professional Profile Data
Dr. Aaron B. Fowler accepts plans from 9 insurance carriers
Dr. Fowler is in network with 9 carriers, including Aetna, Blue Cross Blue Shield of Michigan and United Healthcare. Medicare plans come from the most carriers, 7. Check the plan with the practice before a visit.
- Aetna
- Blue Cross Blue Shield of Michigan
- United Healthcare
- Kaiser Permanente
- Blue Cross Blue Shield of Massachusetts
- HCSC
- Regence Health Plans
- Blue Cross and Blue Shield of Kansas City
- +1 more carriersWith a free account
Plan types Dr. Fowler accepts, by number of carriers
- Medicare7
- PPO6
- HMO4
- POS4
- EPO3
Source: Dmand AI Insurance Network Data
Sources for Dr. Aaron B. Fowler's profile data
| Data on this page | Source |
|---|---|
| NPI, name, sex, specialty and licenses | NPPES NPI Registry (CMS) (opens in a new tab)Dmand AI Professional Profile Data |
| Practice locations and phone | Dmand AI Affiliation Data |
| Primary practice, affiliations and health system | Dmand AI Affiliation DataDmand AI Org Hierarchy Data |
| Medicare services and procedure codes | Medicare Physician & Other Practitioners - by Provider and Service (CMS) (opens in a new tab) |
| State medians for the same specialty | Dmand AI Peer Benchmarks |
| Medicare patients and the all-payer patient panel | Dmand AI Patient Panel DataMedicare Physician & Other Practitioners - by Provider (CMS) (opens in a new tab) |
| Part D prescribing | Medicare Part D Prescribers - by Provider and Drug (CMS) (opens in a new tab)Medicare Part D Prescribers - by Provider (CMS) (opens in a new tab) |
| MIPS scores, telehealth, assignment and procedure percentiles | Doctors and Clinicians National Downloadable File (CMS) (opens in a new tab)Doctors and Clinicians Utilization Data (CMS) (opens in a new tab) |
| Publications, topics and co-authors | PubMed (National Library of Medicine) (opens in a new tab)Dmand AI Research Linkage |
| Industry payments | Open Payments (CMS) (opens in a new tab) |
| Training, board certification and memberships | Dmand AI Professional Profile Data |
| Insurance carriers and plan types | Dmand AI Insurance Network Data |
| EHR at each practice site | Dmand AI Technology Install Data |
| Similar physicians | Dmand AI Affiliation Data |
Data last refreshed October 2026Report an inaccuracyRemove my information
FAQ
Frequently asked questions about Dr. Aaron B. Fowler
Spotted something out of date? Email hello@dmand.ai and we will check the record. Contact details live in the free trial.
What is Dr. Aaron B. Fowler's NPI number?
Dr. Aaron B. Fowler's NPI number is 1346582053. It was assigned on March 20, 2013, and it is active in the NPI Registry.
What kind of doctor is Dr. Aaron B. Fowler?
Dr. Aaron B. Fowler is a cardiothoracic surgeon in Orange, California. The primary specialty in the NPI Registry is Thoracic Surgery (Cardiothoracic Vascular Surgery) Physician (taxonomy code 208G00000X).
Where does Dr. Aaron B. Fowler practice?
Dr. Fowler practices at 1100 West Stewart Dr, Orange, CA 92868. Dr. Fowler's primary practice is Providence St. Joseph Hospital Orange in Orange, California, part of Providence Health & Services. Dmand AI also links Dr. Fowler to 2 hospitals, 3 group practices and clinics and 2 medical groups.
What is Dr. Aaron B. Fowler's office phone number?
The practice phone on file for Dr. Fowler is (714) 633-9111.
What is Dr. Aaron B. Fowler's medical license number?
Dr. Fowler holds California license A136191, one of the licenses on file in 5 states.
Which states has Dr. Aaron B. Fowler been licensed in?
Dmand AI has state licenses on file for Dr. Fowler in California (2015 to 2027), Montana (2024 to 2026), Ohio (2019 to 2022), New Jersey (2018 to 2021) and Utah (2016 to 2018).
Which hospitals is Dr. Aaron B. Fowler affiliated with?
Dr. Fowler practices at Providence St. Joseph Hospital Orange in Orange, California. Dr. Fowler is also affiliated with Providence Mission Hospital. Dmand AI links Dr. Fowler to 2 more hospitals.
What medical group is Dr. Aaron B. Fowler part of?
Dr. Fowler is linked to Orange County Thoracic and Cardiovascular Surgeons. Dmand AI links Dr. Fowler to 2 more medical groups.
Does Dr. Aaron B. Fowler accept Medicare?
Yes. CMS data shows Dr. Fowler billed Medicare for 238 services in 2024, and Dr. Fowler accepts Medicare assignment.
How many Medicare patients does Dr. Aaron B. Fowler see?
CMS counts 139 Medicare patients who saw Dr. Fowler in 2024, with an average age of 77.
Show 9 more questionsShow fewer questions
Is Dr. Aaron B. Fowler board certified?
Yes. Dr. Fowler is board certified in thoracic and cardiac surgery by the American Board of Thoracic Surgery.
What services does Dr. Aaron B. Fowler bill to Medicare?
In 2024, Dr. Fowler's most billed Medicare services were hospital inpatient care (99223), surgery: heart and blood vessels (33533) and surgery: heart and blood vessels (33508).
Where did Dr. Aaron B. Fowler go to medical school?
Dr. Fowler graduated from Spencer Fox Eccles School of Medicine in 2013.
What drugs does Dr. Aaron B. Fowler prescribe most?
In 2017 Medicare Part D data, Dr. Fowler's most prescribed drugs by claims were Tramadol HCl and Hydrocodone-Acetaminophen.
Has Dr. Aaron B. Fowler received payments from drug or device companies?
CMS Open Payments shows $38,307 in general payments to Dr. Fowler from 28 companies from 2018 to 2025. The largest total came from Edwards Lifesciences Corporation.
How long has Dr. Aaron B. Fowler been practicing?
Dr. Fowler graduated from medical school in 2013, 13 years ago.
Does Dr. Aaron B. Fowler do research?
Dmand AI links 2 publications to Dr. Fowler.
Who does Dr. Aaron B. Fowler publish with?
Dr. Fowler's most frequent co-authors are Aamna Ali, MD (1 shared paper), Mohammed Hassan Al-Temimi, MD (1 shared paper) and Hannah Copeland, MD (1 shared paper).
What insurance does Dr. Aaron B. Fowler accept?
Dr. Fowler is in network with 9 carriers, including Aetna, Blue Cross Blue Shield of Michigan and United Healthcare. Medicare plans come from the most carriers, 7. Check the plan with the practice before a visit.
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