NPPES file of Aug 9, 2026

Aaron D. Kromhout, M.D.

Obstetrics Physician · San Luis Obispo, CA

Aaron D. Kromhout, M.D. is an obstetrics physician with a practice address in San Luis Obispo, California, and NPI 1093717472, issued on Aug 15, 2005. Check the license (California A88432, as entered in NPPES) on the Medical Board of California; the Medicare figures below come from public CMS files.

Record from CMS NPPES, file of Aug 9, 2026 · Medicare files 2024 · method · Verify with CMS →

NPPES recordNPPES file of Aug 9, 2026
1093717472
Name
Aaron D. Kromhout
Credential
M.D.
Primary taxonomy
Obstetrics Physician 207VX0000X
License number
A88432 CA
Self-reported in NPPES; status is on the state search
Practice location
1551 Bishop St Ste B240, San Luis Obispo, CA 93401
Phone
(805) 549-0402
Enumerated
Aug 15, 2005
Record last updated
Oct 1, 2024
Fax
(805) 549-0465
Medicare enrollment
Enrolled (PECOS I20041109000764); accepts Medicare assignment
Medical or professional school
University Of California, San Diego School Of Medicine, 1997
Entity
Type 1 · individual
Public record from CMS NPPES (open it on the CMS NPI Registry). Enrollment, assignment, school and telehealth: CMS Doctors and Clinicians file, Aug 2026. A record is not a license: verify it with the state board.
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Also registered at 1551 Bishop St Ste B240

A shared address usually means a shared clinic or building; it does not show who employs whom.

  1. Helen Cominos, C.N.M.Advanced Practice Midwife1104818988

Verify Aaron D. Kromhout in five checks

  1. 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
  2. 2LicenseActive license and public ordersMedical Board of California
    Search for license A88432    Check the board
  3. 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
  4. 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
  5. 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
Open the California license search

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88% more Medicare Part D claims than the average obstetrics physician in 2024

410 Medicare Part D claims for 74 beneficiaries, against an average of 218 among the 863 providers of this specialty who prescribed in Part D.

  1. Aaron Kromhout410
  2. Specialty average218

Most prescribed

  1. Progesterone138 claims
  2. Estradiol73 claims
  3. Estradiol (Twice Weekly)35 claims
  4. Yuvafem25 claims
  5. Dotti18 claims
  6. Valacyclovir17 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: $54.51

2 payments; by number, the most common kind was food and beverage; the largest payer was Bayer Healthcare Pharmaceuticals Inc. The 679 providers of this specialty with any payment received $826.19 on average. Payments are reported by manufacturers, not by the provider, and are not a sign of wrongdoing.

  1. Aaron Kromhout$54.51
  2. Specialty average$826.19

Source: CMS Open Payments, program year 2024 (openpaymentsdata.cms.gov); average among providers of this specialty with at least one payment.

Bills Medicare through one group practice

  1. Community Health Centers OF The Central Coast IncSan Luis Obispo, CA

Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).

Obstetrics Physician providers in California

There are 174 obstetrics physician records in California.

All 174 in California → Every provider in San Luis Obispo →

Other obstetrics physician records in California

  1. Kate Adkins, M.D.Hemet, CA1023205408
  2. Nayeema Ahmed, M.D.Riverside, CA1063410280
  3. Rimsha Ahmed, M.D.Los Angeles, CA1770927899
  4. Mohsin Ali, M.D.Cerritos, CA1811990708
  5. Maryam Ardalan, MDSanta Clarita, CA1396936217
  6. Omar Aziz, M.D.El Centro, CA1548662182
  7. Secily Bason-Mitchell, M.D.San Francisco, CA1992872089
  8. Stephen Belton, M.D.San Jose, CA1992764773
  9. Christina Bennett-Stewart, M.D.Redlands, CA1134162225
  10. Megan BernsteinSanta Monica, CA1659830610

Common questions

What is Aaron D. Kromhout, M.D.'s NPI number?

Aaron D. Kromhout, M.D.'s National Provider Identifier (NPI) is 1093717472, issued on Aug 15, 2005. An NPI identifies a provider in billing; it is not a license.

Where is Aaron D. Kromhout, M.D. located?

The NPPES record lists a practice address at 1551 Bishop St Ste B240, San Luis Obispo, CA, 93401. Phone: (805) 549-0402. Providers update this record themselves, so call before visiting.

How can I verify Aaron D. Kromhout, M.D.'s license?

NPPES lists California license number A88432, 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 Aaron D. Kromhout, M.D. prescribe under Medicare Part D?

In 2024, Aaron D. Kromhout, M.D. had 410 Medicare Part D claims for 74 beneficiaries; the average among obstetrics physician prescribers was 218. 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.

Written with AI tools from the named public files; every figure is computed from those files (how it is made).

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.