1. Home
  2. Directory
  3. California
  4. Los Gatos
  5. Chiropractor
  6. NPI Profile

MARIANNE NIELSEN DC
NPI 1437350949
Chiropractor in Los Gatos, CA

Active since May 30, 2007
321 LOS GATOS SARATOGA RD, LOS GATOS, CA 95030(408) 268-7268 Get Directions Write a Review

NPPES record last updated: July 8, 2007. Verified against the NPPES registry weekly; last sync: November 01, 2026.

About Marianne Nielsen Dc NPPES

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

MARIANNE NIELSEN DC (NPI 1437350949) is an individual chiropractor in Los Gatos, California, licensed in California (22103) and active in the NPI registry since May 2007. She is a graduate of Palmer College Chiropractic - West Sunnyvale (1991).

NPPES Registry Identity

NPI1437350949
Entity TypeIndividualFemale
Primary Taxonomy111N00000X
Provider Legal NameMARIANNE NIELSENCredential: DC
Location Address321 LOS GATOS SARATOGA RDLos Gatos, CA 95030-5310
Mailing Address321 Los Gatos Saratoga RdLos Gatos, CA 95030-5310 · (408) 268-7268
Phone(408) 268-7268
Sole ProprietorYes
Medical School CMSPalmer College Chiropractic - West SunnyvaleGraduated 1991
Enumeration DateMay 30, 2007
Last NPPES UpdateJuly 8, 2007
✔ NPI 1437350949 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses

★ Primary SpecialtyChiropractorChiropractic Providers
Taxonomy Code111N00000X
License✔ Licensed in CA · 22103
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.
321 LOS GATOS SARATOGA RD, Los Gatos, CA 95030
Open in Google Maps ↗

Medicare Participation & PECOS CMS

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

Medicare Enrollment Status

✔

Enrolled in Medicare (PECOS)

Marianne Nielsen Dc is registered in the CMS Provider Enrollment, Chain and Ownership System (PECOS).

PECOS PAC ID4486875085
PECOS Enrollment IDI20141023002597

Medicare Billing Reassignment

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

Marianne Nielsen Chiropractic Neurology Inc.
Same address
Neurology
321 LOS GATOS SARATOGA RD
Los Gatos, CA 95030
  • Reassigned Medicare billing, California enrollment
NPI 1427535525 (408) 395-6995

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.
475 services57 patients

Other Providers at the Same Location NPPES 3

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

MARIANNE NIELSEN CHIROPRACTIC NEUROLOGY INC.
Chiropractor (Neurology)
321 LOS GATOS SARATOGA RD
LOS GATOS, CA 95030
Santa Clara County (408) 395-6995
ADVANCED WELLNESS AND NUTRITION CENTER
Clinic/Center (Health Service)
321 LOS GATOS SARATOGA RD
LOS GATOS, CA 95030
Santa Clara County (408) 395-6995
MS. ANNE ALYSE OSTIS
Acupuncturist
321 LOS GATOS SARATOGA RD
LOS GATOS, CA 95030
Santa Clara County (408) 691-7694

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 Marianne Nielsen's NPI number?

The NPI number for Marianne Nielsen is 1437350949. It was assigned to this individual provider in the NPPES registry on May 30, 2007.

Where is Marianne Nielsen located?

Marianne Nielsen practices at 321 Los Gatos Saratoga Rd, Los Gatos, CA 95030. The listed phone number is (408) 268-7268.

What is Marianne Nielsen's specialty?

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

Is Marianne Nielsen enrolled in Medicare?

Yes. Marianne Nielsen is registered in the Medicare PECOS enrollment system.

Which organization bills Medicare for Marianne Nielsen's services?

According to the CMS Revalidation Reassignment List (October 2026 release), Marianne Nielsen reassigns Medicare benefits to Marianne Nielsen Chiropractic Neurology Inc. (Los Gatos, 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 Marianne Nielsen'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 Marianne Nielsen 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.