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DR. AARON D. KROMHOUT M.D.
NPI 1093717472
Obstetrics & Gynecology - Obstetrics in San Luis Obispo, CA

Active since August 15, 2005PECOS EnrolledAccepts Medicare Assignment
1551 BISHOP ST STE B240, SAN LUIS OBISPO, CA 93401(805) 549-0402(805) 549-0465 Get Directions Write a Review

NPPES record last updated: October 1, 2024. Verified against the NPPES registry weekly; last sync: October 18, 2026.

About Dr. Aaron D. Kromhout M.d. NPPES

Official registry information on file with the National Plan and Provider Enumeration System.

DR. AARON D. KROMHOUT M.D. (NPI 1093717472) is an individual obstetrics provider in San Luis Obispo, California, licensed in California (A88432) and active in the NPI registry since August 2005. He is enrolled in Medicare PECOS, maintains a secondary practice location in San Luis Obispo, and is a graduate of University Of California, San Diego School Of Medicine (1997).

NPPES Registry Identity

NPI1093717472
Entity TypeIndividualMale
Primary Taxonomy207VX0000X
Provider Legal NameDR. AARON D. KROMHOUTCredential: M.D.
Location Address1551 BISHOP ST STE B240San Luis Obispo, CA 93401-4635
Mailing Address2050 S Blosser RdSanta Maria, CA 93458-7310 · (805) 361-8030 · Fax (805) 361-8097
Phone(805) 549-0402
Fax(805) 549-0465
Sole ProprietorYes
Medical School CMSUniversity Of California, San Diego School Of MedicineGraduated 1997
Enumeration DateAugust 15, 2005
Last NPPES UpdateOctober 1, 2024
NPPES CertifiedOctober 1, 2024
✔ NPI 1093717472 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses

★ Primary SpecialtyObstetrics & Gynecology · ObstetricsAllopathic & Osteopathic Physicians
Taxonomy Code207VX0000X
License✔ Licensed in CA · A88432
Definition
A physician who specializes in diagnosis, treatment, and management of patients with obstetric conditions. Source: National Uniform Claim Committee
1551 BISHOP ST STE B240, San Luis Obispo, CA 93401
Open in Google Maps ↗

Secondary Practice Location 1

Location 11941 Johnson Ave, Suite 202San Luis Obispo, CA 93401-4140 · Phone (805) 548-0033 · Fax (805) 548-0034

Other Identifiers 1

OtherA88432CA · Medical License #

Medicare Participation & PECOS CMS

Medicare enrollment, assignment, billing reassignment, and ordering and referring status from CMS.

Medicare Enrollment Status

✔

Enrolled in Medicare and accepts Medicare assignment

Dr. Aaron D. Kromhout M.d. is registered in PECOS and agrees to accept the Medicare-approved amount as full payment. Medicare patients are not billed beyond the standard deductible and coinsurance.

PECOS PAC ID6800859034
PECOS Enrollment IDI20041109000764
Eligible to Order & Refer✔ Part B Labs & Imaging✔ Durable Medical Equipment✔ Home Health Agency✔ Power Mobility DevicesPer the CMS Ordering and Referring file. Eligibility means Medicare pays claims that this provider orders or refers for these categories.

Medicare Billing Reassignments

2

Medicare enrollment records show Aaron Kromhout reassigns Medicare billing to 2 organizations. Each organization bills Medicare for the services this provider delivers there; the nearest is listed first.

Community Health Centers Of The Central Coast Inc
Same address
Federally Qualified Health Center (FQHC)
1551 BISHOP ST
San Luis Obispo, CA 93401
  • Reassigned Medicare billing, California enrollment
  • 213 clinicians in this Medicare group
NPI 1275553257 (805) 269-1350
Obhg California, P.C.
2,156 mi
Obstetrics & Gynecology
777 LOWNDES HILL RD BLDG 1
Greenville, SC 29607
  • Reassigned Medicare billing, California enrollment
  • Medicare enrollment name: Obhg California PC
  • 711 clinicians in this Medicare group
NPI 1215258892 (800) 967-2289

Source: CMS Revalidation Reassignment List, October 2026 release. Reassignment records can lag staffing changes; confirm a current affiliation with the organization.

Areas of Expertise CMS Part B claims 2

Services this provider delivered to Medicare fee-for-service patients, from the CMS Medicare utilization data. Higher counts generally reflect more experience with a service; care delivered outside Medicare is not included.

Established patient office or other outpatient visit with low level od decision making, if using time, 20 minutes or more 99213
This is a routine visit for patients who have already been seen by the healthcare provider. During this approximately 20-29 minute appointment, your health status will be evaluated and any necessary treatments or tests will be discussed. It's a chance to address any health concerns you may have.
28 services24 patients
Annual wellness visit, includes a personalized prevention plan of service (pps), subsequent visit G0439
An annual wellness visit is a yearly appointment with your primary care provider to create or update a personalized prevention plan. This plan helps prevent illness based on your current health and risk factors. It's a subsequent visit, meaning it follows an initial assessment.
16 services16 patients

Physician Visit Costs CMS claims · ZIP area

Typical Medicare office-visit costs in the 93401 ZIP code area, from fee-for-service claims. These are area statistics, not this provider’s prices; actual charges vary by service and coverage.

New Patient
$135.73 typical visit price
range $59.84 – $178.89
Typical copayment $33.93 (range $14.96 – $44.72)
Most-billed visit code 99204
Established Patient
$74.24 typical visit price
range $19.70 – $146.55
Typical copayment $18.56 (range $4.92 – $36.63)
Most-billed visit code 99213
Amounts reflect what Medicare beneficiaries in this ZIP area are typically charged for office visits. Patients with other coverage should check their individual plans.

Other Providers at the Same Location NPPES 2

Providers registered at the same practice address, or within the immediate area, according to the NPPES registry.

HELEN GEORGE COMINOS C.N.M.
Advanced Practice Midwife
1551 BISHOP ST STE B240
SAN LUIS OBISPO, CA 93401
San Luis Obispo County (805) 549-0402
THESSALONIKI MAY TRUJILLO
Nurse Practitioner (Women's Health)
1551 BISHOP ST STE B240
SAN LUIS OBISPO, CA 93401
San Luis Obispo County (805) 549-0402

Frequently Asked Questions NPPES & CMS

Common questions about this NPI record, answered from the official NPPES registry and CMS datasets shown on this page.

What is Aaron Kromhout's NPI number?

The NPI number for Aaron Kromhout is 1093717472. It was assigned to this individual provider in the NPPES registry on August 15, 2005.

Where is Aaron Kromhout located?

Aaron Kromhout practices at 1551 Bishop St Ste B240, San Luis Obispo, CA 93401. The listed phone number is (805) 549-0402.

What is Aaron Kromhout's specialty?

The primary specialty registered for this NPI is Obstetrics & Gynecology, specializing in Obstetrics, with taxonomy code 207VX0000X.

Is Aaron Kromhout enrolled in Medicare?

Yes. Aaron Kromhout is registered in the Medicare PECOS system and accepts Medicare assignment, which means accepting the Medicare-approved amount as payment in full for covered services.

Which organizations bill Medicare for Aaron Kromhout's services?

According to the CMS Revalidation Reassignment List (October 2026 release), Aaron Kromhout reassigns Medicare benefits to 2 organizations: Community Health Centers Of The Central Coast Inc (San Luis Obispo, CA) and Obhg California, P.C. (Greenville, SC). Each reassignment is filed with Medicare on form CMS-855R, signed by both the clinician and the organization, and lets the organization bill Medicare and receive payment for Aaron Kromhout's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.

When was this NPI record last updated?

The NPPES record for Aaron Kromhout was last updated on October 1, 2024. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 2 years ago. If this record has changed at CMS more recently, you can request an on-demand re-check against the live CMS registry, directly from this page.