1. Home
  2. Directory
  3. California
  4. Discovery Bay
  5. Chiropractor
  6. NPI Profile
Recently Updated NPI Information — some details in this NPI profile have been updated in the NPI registry within the last 60 days.

DR. MICHAEL WILLIAM OLFF DC
NPI 1679564942
Chiropractor in Discovery Bay, CA

Active since November 04, 2005
1555 RIVERLAKE RD, STE. L., DISCOVERY BAY, CA 94514(925) 240-6533(925) 778-8109 Get Directions Write a Review

NPPES record last updated: July 13, 2026. Verified against the NPPES registry weekly; last sync: August 16, 2026.

About Dr. Michael William Olff Dc NPPES

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

DR. MICHAEL WILLIAM OLFF DC (NPI 1679564942) is an individual chiropractor in Discovery Bay, California, licensed in California (12493) and active in the NPI registry since November 2005.

NPPES Registry Identity

NPI1679564942
Entity TypeIndividualMale
Primary Taxonomy111N00000X
Provider Legal NameDR. MICHAEL WILLIAM OLFFCredential: DC
Location Address1555 RIVERLAKE RD, STE. L.Discovery Bay, CA 94514-9334
Mailing Address1555 Riverlake Rd, Ste. L.Discovery Bay, CA 94514-9334 · (925) 240-6533 · Fax (925) 778-8109
Phone(925) 240-6533
Fax(925) 778-8109
Sole ProprietorNo
Enumeration DateNovember 4, 2005
Last NPPES UpdateJuly 13, 2026
✔ NPI 1679564942 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses

★ Primary SpecialtyChiropractorChiropractic Providers
Taxonomy Code111N00000X
License✔ Licensed in CA · 12493
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.
1555 RIVERLAKE RD, Discovery Bay, CA 94514
Open in Google Maps ↗

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 Michael Olff's NPI number?

The NPI number for Michael Olff is 1679564942. It was assigned to this individual provider in the NPPES registry on November 4, 2005.

Where is Michael Olff located?

Michael Olff practices at 1555 Riverlake Rd Ste. L., Discovery Bay, CA 94514. The listed phone number is (925) 240-6533.

What is Michael Olff's specialty?

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

When was this NPI record last updated?

The NPPES record for Michael Olff was last updated on July 13, 2026. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 37 days 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.