Dr. Aaron D. Kromhout, MD
- Medicare services, 2024
- 44
- Medicare patients, 2024
- 56
- Part D claims, 2024
- 410
- Publications
- 1
- Hospital affiliations
- 3
- Practice address
- 1911 Johnson Ave, San Luis Obispo, CA 93401
- Practice phone
- Call (805) 543-5353
- Professional email
- Get professional email
- Personal email
- Get personal email
- Mobile number
- Get mobile number
Find Dr. Kromhout'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 D. Kromhout is an obstetrics physician in San Luis Obispo, California
Dr. Kromhout practices at Dignity Health - French Hospital Medical Center in San Luis Obispo, California, part of CommonSpirit Health.
Dr. Kromhout's NPI, 1093717472, was assigned on August 15, 2005. Dr. Kromhout graduated from UC San Diego School of Medicine in 1997. Dr. Kromhout holds California license A88432.
- NPI
- 1093717472NPI Registry (opens in a new tab)
- Medicare PAC ID
- 6800859034
- NPI enumeration date
- August 15, 2005
- NPI status
- Active
- Accepts Medicare assignment
- Yes
- Practice phone
- (805) 543-5353
- Professional email
- Get email
- Personal email
- Get email
- Mobile number
- Get number
- Sex
- Male
- Estimated age
- 55
- Medical school graduation
- 1997
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; Dmand AI Affiliation Data; and Doctors and Clinicians National Downloadable File (CMS)
Dr. Aaron D. Kromhout practices at Dignity Health - French Hospital Medical Center in San Luis Obispo, California
Dr. Kromhout's primary practice is Dignity Health - French Hospital Medical Center, at 1911 Johnson Ave, San Luis Obispo, CA 93401 in San Luis Obispo County. The practice phone is (805) 543-5353.
- Dignity Health - French Hospital Medical Center1911 Johnson Ave, San Luis Obispo, CA 93401 · San Luis Obispo CountyPhone(805) 543-5353
Source: Dmand AI Affiliation Data
Dr. Aaron D. Kromhout is affiliated with 4 sites of care and 2 medical groups
Dr. Kromhout's primary practice is Dignity Health - French Hospital Medical Center in San Luis Obispo, California, part of CommonSpirit Health. Dr. Kromhout is also affiliated with Adventist Health Sierra Vista. The medical group on file is Community Health Centers of the Central Coast, Inc. Dmand AI also links Dr. Kromhout to 1 more hospital, 1 community health center and 1 medical group, 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 D. Kromhout's practice
Dmand AI tracks the electronic health record (EHR) system at each site where Dr. Kromhout practices, 4 sites in all. Vendor and product names are available with a free account.
| Site | EHR vendor and product |
|---|---|
| Dignity Health - French Hospital Medical Center | Available with a free account |
| +3 more sites and 1 medical group | Available with a free account |
Source: Dmand AI Technology Install Data
For health IT teams
Dmand AI maps EHR vendors, IT decision makers and buying committees across CommonSpirit Health and 6.2K+ hospitals, with verified contacts in the same login.
Dr. Aaron D. Kromhout is one of 164 obstetrics physicians in California
Obstetrics is Dr. Kromhout's primary specialty in the NPI Registry, under taxonomy code 207VX0000X. Dr. Kromhout is board certified in obstetrics & gynecology by the American Board of Obstetrics and Gynecology. Dmand AI has Dr. Kromhout's licenses on file in 2 states: California and Arizona.
Specialties and state licenses
- Obstetrics, CaliforniaPrimary
- Arizona license
Clinical focus
Dmand AI lists menopause and vaginal infection among the conditions Dr. Kromhout treats.
Obstetrics physicians near Dr. Kromhout
Counts of obstetrics physicians 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 D. Kromhout billed Medicare for 44 services in 2024
CMS data shows 44 Medicare services from Dr. Kromhout across 2 procedure codes in 2024, for 56 Medicare patients. Medicare paid $3,654 for them. Every service was in an office.
Dr. Kromhout's Medicare services by type, 2023 to 2024
- 2023
- 2024
- Office and hospital visits
- 2023: 502024: 2844%
- Other services
- 2023: 282024: 1643%
Dr. Kromhout compared with the California median for obstetrics physicians, 2024
- Dr. Kromhout
- California median
- Medicare services
- 44vs 5215% below
- Medicare patients
- 56vs 4137% above
- Part D claims
- 331vs 349.7 times
Medians across 116 obstetrics physicians in California with Dmand AI profiles that report each measure.
Dr. Kromhout'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. Kromhout?
Medicare shows one payer. Book a meeting to get commercial claims data for Dr. Kromhout and other obstetrics physicians in California.
Sources: Medicare Physician & Other Practitioners - by Provider and Service (CMS), 2024 data; and Dmand AI Peer Benchmarks
Dr. Aaron D. Kromhout treated 56 Medicare patients in 2024, average age 67
CMS counts 56 Medicare patients who saw Dr. Kromhout in 2024. The largest group is 65 to 74, with 36 patients. 61% of them have high cholesterol, and 36% have arthritis. Their average risk score is 0.71, where 1.00 is the Medicare average.
Across all payers, Dmand AI patient panel data puts Dr. Kromhout's median patient age at 39, with 99% women.
Dr. Kromhout's Medicare patients by age, 2024
CMS leaves out age groups with fewer than 11 patients.
Chronic conditions among Dr. Kromhout's Medicare patients, 2024
- High cholesterol61%
- Arthritis36%
- High blood pressure32%
- Anxiety23%
- Osteoporosis21%
Share of Medicare patients with each condition. A patient can have several.
Dr. Kromhout's patients across all payers
Dmand AI patient panel data covers Medicare, Medicaid and commercial patients.
Patient panel by age, all payers
Median age 39
Patient panel by sex, all payers
- Women99%
- Men0%
Sources: Dmand AI Patient Panel Data; and Medicare Physician & Other Practitioners - by Provider (CMS), 2024 data
Dr. Aaron D. Kromhout wrote 410 Medicare Part D claims in 2024
In 2024, Dr. Kromhout wrote 410 Medicare Part D claims for 74 patients. 87% of them were for generic drugs. CMS names the drug for 331 of them, across 8 drugs with 11 or more claims each, at $25,883 in total drug cost. In 2023, CMS named 238 claims across 6 drugs.
Dr. Kromhout's Part D claims by kind of drug, 2024
- Generic357 claims87%
- Brand-name and other53 claims13%
Dr. Kromhout's most prescribed drugs by claims, 2024
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, 2023 to 2024
- 2023
- 2024
- Claims for drugs CMS names
- 2023: 2382024: 33139%
Drugs named by CMS: 8 in 2024, 6 in 2023.
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
How Dr. Aaron D. Kromhout takes part in Medicare
Dr. Kromhout accepts Medicare assignment, so Medicare's approved amount is taken as full payment.
- Accepts Medicare assignment
- Yes
Source: Doctors and Clinicians National Downloadable File (CMS)
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Dr. Aaron D. Kromhout has 1 publication on record
Dmand AI links 1 paper to Dr. Kromhout.
Recent publications by Dr. Kromhout
See who Dr. Kromhout researches with
Physician Network Discovery turns co-authorship, shared hospitals and shared groups into a map of who Dr. Kromhout works with, so you can find a warm path to the right obstetrics physicians.
Sources: PubMed (National Library of Medicine); and Dmand AI Research Linkage
Dr. Aaron D. Kromhout received $752 in industry payments from 2016 to 2025
CMS Open Payments shows 34 general payments to Dr. Kromhout from 14 drug and device companies from 2016 to 2025. Food and beverage make up the largest share, 87% of the total. Bayer HealthCare Pharmaceuticals Inc. paid the most, $275.
General payments to Dr. Kromhout by program year, 2016 to 2025
General payments to Dr. Kromhout by kind, 2016 to 2025
- Food and beverage$65287%
- Consulting fees$10013%
Companies that paid Dr. Kromhout the most, 2016 to 2025
Share is of all general payments to this clinician.
Source: Open Payments (CMS), 2025 data, released July 7, 2026
Dr. Aaron D. Kromhout has 1 award and honors on record
Dmand AI lists 1 award for Dr. Kromhout.
Awards and honors for Dr. Kromhout
- Undated
- ACOG Fellow
Source: Dmand AI Professional Profile Data
Dr. Aaron D. Kromhout graduated from UC San Diego School of Medicine
Dr. Kromhout graduated from UC San Diego School of Medicine in 1997. Dr. Kromhout is a member of American College of Obstetricians and Gynecologists.
- Medical school
- Board certified in obstetrics & gynecology
Source: Dmand AI Professional Profile Data
Dr. Aaron D. Kromhout accepts plans from 14 insurance carriers
Dr. Kromhout is in network with 14 carriers, including Aetna, Blue Cross Blue Shield of Michigan and United Healthcare. PPO plans come from the most carriers, 9. Check the plan with the practice before a visit.
- Aetna
- Blue Cross Blue Shield of Michigan
- United Healthcare
- Elevance
- HCSC
- Blue Cross Blue Shield of Massachusetts
- Regence Health Plans
- Alliant Health Plans
- +6 more carriersWith a free account
Plan types Dr. Kromhout accepts, by number of carriers
- PPO9
- Medicare7
- HMO6
- EPO4
- POS4
Source: Dmand AI Insurance Network Data
Sources for Dr. Aaron D. Kromhout'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) |
| 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) |
| Awards and committee roles | Dmand AI Professional Profile Data |
| 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 D. Kromhout
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 D. Kromhout's NPI number?
Dr. Aaron D. Kromhout's NPI number is 1093717472. It was assigned on August 15, 2005, and it is active in the NPI Registry.
What kind of doctor is Dr. Aaron D. Kromhout?
Dr. Aaron D. Kromhout is an obstetrics physician in San Luis Obispo, California. The primary specialty in the NPI Registry is Obstetrics Physician (taxonomy code 207VX0000X).
Where does Dr. Aaron D. Kromhout practice?
Dr. Kromhout practices at 1911 Johnson Ave, San Luis Obispo, CA 93401. Dr. Kromhout's primary practice is Dignity Health - French Hospital Medical Center in San Luis Obispo, California, part of CommonSpirit Health. Dmand AI also links Dr. Kromhout to 1 hospital, 1 community health center and 1 medical group.
What is Dr. Aaron D. Kromhout's office phone number?
The practice phone on file for Dr. Kromhout is (805) 543-5353.
What is Dr. Aaron D. Kromhout's medical license number?
Dr. Kromhout holds California license A88432, one of the licenses on file in 2 states.
Which states has Dr. Aaron D. Kromhout been licensed in?
Dmand AI has state licenses on file for Dr. Kromhout in California (2004 to 2026) and Arizona (1999 to 2025).
Which hospitals is Dr. Aaron D. Kromhout affiliated with?
Dr. Kromhout practices at Dignity Health - French Hospital Medical Center in San Luis Obispo, California. Dr. Kromhout is also affiliated with Adventist Health Sierra Vista. Dmand AI links Dr. Kromhout to 1 more hospital.
What medical group is Dr. Aaron D. Kromhout part of?
Dr. Kromhout is linked to Community Health Centers of the Central Coast, Inc. Dmand AI links Dr. Kromhout to 1 more medical group.
Does Dr. Aaron D. Kromhout accept Medicare?
Yes. CMS data shows Dr. Kromhout billed Medicare for 44 services in 2024, and Dr. Kromhout accepts Medicare assignment.
How many Medicare patients does Dr. Aaron D. Kromhout see?
CMS counts 56 Medicare patients who saw Dr. Kromhout in 2024, with an average age of 67.
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Is Dr. Aaron D. Kromhout board certified?
Yes. Dr. Kromhout is board certified in obstetrics & gynecology by the American Board of Obstetrics and Gynecology.
What services does Dr. Aaron D. Kromhout bill to Medicare?
In 2024, Dr. Kromhout's most billed Medicare services were office visit, established patient (99213) and medicare service (G0439).
Where did Dr. Aaron D. Kromhout go to medical school?
Dr. Kromhout graduated from UC San Diego School of Medicine in 1997.
What drugs does Dr. Aaron D. Kromhout prescribe most?
In 2024 Medicare Part D data, Dr. Kromhout's most prescribed drugs by claims were Progesterone, Estradiol and Estradiol (Twice Weekly).
Has Dr. Aaron D. Kromhout received payments from drug or device companies?
CMS Open Payments shows $752 in general payments to Dr. Kromhout from 14 companies from 2016 to 2025. The largest total came from Bayer HealthCare Pharmaceuticals Inc.
How long has Dr. Aaron D. Kromhout been practicing?
Dr. Kromhout graduated from medical school in 1997, 29 years ago.
Does Dr. Aaron D. Kromhout do research?
Dmand AI links 1 publication to Dr. Kromhout.
What insurance does Dr. Aaron D. Kromhout accept?
Dr. Kromhout is in network with 14 carriers, including Aetna, Blue Cross Blue Shield of Michigan and United Healthcare. PPO plans come from the most carriers, 9. Check the plan with the practice before a visit.
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