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DR. DARRIN DEWIGHT OILAR D.C.
NPI 1023190048
Chiropractor in Cottonwood, CA

Active since October 19, 2006
3435 MAIN ST., COTTONWOOD, CA 96022(530) 347-9500(530) 347-4939 Get Directions Write a Review

NPPES record last updated: July 8, 2007. Verified against the NPPES registry weekly; last sync: October 25, 2026.

About Dr. Darrin Dewight Oilar D.c. NPPES

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

DR. DARRIN DEWIGHT OILAR D.C. (NPI 1023190048) is an individual chiropractor in Cottonwood, California, licensed in California (DC27142) and active in the NPI registry since October 2006. He is a graduate of Other (1997).

NPPES Registry Identity

NPI1023190048
Entity TypeIndividualMale
Primary Taxonomy111N00000X
Provider Legal NameDR. DARRIN DEWIGHT OILARCredential: D.C.
Location Address3435 MAIN ST.Cottonwood, CA 96022
Mailing AddressPo Box 1827Cottonwood, CA 96022-1827 · (530) 347-9500 · Fax (530) 347-4939
Phone(530) 347-9500
Fax(530) 347-4939
Sole ProprietorYes
Medical School CMSOtherGraduated 1997
Enumeration DateOctober 19, 2006
Last NPPES UpdateJuly 8, 2007
✔ NPI 1023190048 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses

★ Primary SpecialtyChiropractorChiropractic Providers
Taxonomy Code111N00000X
License✔ Licensed in CA · DC27142
Definition
A provider qualified by a Doctor of Chiropractic (D.C.), licensed by the State and who practices chiropractic medicine -that discipline within the healing arts which deals with the nervous system and its relationship to the spinal column and its interrelationship with other body systems.
3435 MAIN ST., Cottonwood, CA 96022
Open in Google Maps ↗

Other Identifiers 1

Medicare ID-Type UnspecifiedDC0271420CA

Medicare Participation & PECOS CMS

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

Medicare Enrollment Status

✔

Enrolled in Medicare (PECOS)

Dr. Darrin Dewight Oilar D.c. is registered in the CMS Provider Enrollment, Chain and Ownership System (PECOS).

PECOS PAC ID6709918394
PECOS Enrollment IDI20100716000725

Medicare Billing Reassignment

Medicare enrollment records show Darrin Oilar reassigns Medicare billing to 1 organization. The organization bills Medicare for the services this provider delivers there.

Kremer Chiropractic, Inc.
14 mi
Chiropractor
1615 MAIN ST
Red Bluff, CA 96080
  • Reassigned Medicare billing, California enrollment
  • 3 clinicians in this Medicare group
NPI 1609809037 (530) 527-0220

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

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.

Chiropractic manipulative treatment, 3-4 spinal regions 98941
Chiropractic manipulative treatment for 3-4 spinal regions involves a trained professional applying controlled force to specific areas of your spine. This can help alleviate pain, improve physical function, and support your body's natural healing process.
734 services53 patients

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 Darrin Oilar's NPI number?

The NPI number for Darrin Oilar is 1023190048. It was assigned to this individual provider in the NPPES registry on October 19, 2006.

Where is Darrin Oilar located?

Darrin Oilar practices at 3435 Main St., Cottonwood, CA 96022. The listed phone number is (530) 347-9500.

What is Darrin Oilar's specialty?

The primary specialty registered for this NPI is Chiropractor with taxonomy code 111N00000X.

Is Darrin Oilar enrolled in Medicare?

Yes. Darrin Oilar is registered in the Medicare PECOS enrollment system.

Which organization bills Medicare for Darrin Oilar's services?

According to the CMS Revalidation Reassignment List (October 2026 release), Darrin Oilar reassigns Medicare benefits to Kremer Chiropractic, Inc. (Red Bluff, CA). The 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 Darrin Oilar'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 Darrin Oilar was last updated on July 8, 2007. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 19 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.