Marianne Nielsen, DC
NPI 1437350949 · Chiropractor · Los Gatos, CA
Enrolled with Medicare as Practitioner - Chiropractic · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Marianne Nielsen, DC is a Chiropractor provider in Los Gatos, CA (NPI 1437350949).
Provider details
- NPI number
- 1437350949
- Entity type
- Individual
- Primary specialty
- ChiropractorChiropractic Providers
- Credential
- DC
- Sex
- Female
- Sole proprietor
- Yes
- License
- 22103 (CA)
Specialties & taxonomies
Chiropractic Providers
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure28% of score
19 yrs in NPPES registry
- Profile completeness28% of score
100% of core fields populated
- Practice footprint17% of score
1 documented practice location
- Medicare service volume (vs. specialty peers)28% of score
475 Medicare services, 2024 (ranked within specialty)
Medicare volume is ranked against active providers in the same specialty. Signals a provider has no public data for (e.g. Medicare claims) are left out of the score entirely — never counted as zero — so providers without that data are not penalized. See the full formula and weights in our methodology.
What this provider does (Medicare)
Based on Medicare fee-for-service claims, 2024; not all care is captured.
| Service (HCPCS) | Medicare services | Typical Medicare-allowed (2024) |
|---|---|---|
| Chiropractic Manipulative Treatment, 3-4 Spinal Regions98941 | 475 | $45 |
Typical Medicare-allowed amounts for these services range $45–$45 (2024). The Medicare-allowed amount is what Medicare recognizes for a service under fee-for-service — a reference figure for 2024, not a price quote and not what you would be billed. Medicare Part B covers roughly an eighth of all NPIs (65+ skew); services with fewer than 11 beneficiaries are suppressed by CMS. Source: CMS Medicare Physician & Other Practitioners, by Provider & Service.
Practice location
Mailing address
Registry dates
- Enumerated
- 2007-05-30
- Last updated
- 2007-07-08
Frequently asked questions
- What is Marianne Nielsen's NPI number?
- Marianne Nielsen's National Provider Identifier (NPI) is 1437350949, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Marianne Nielsen's specialty?
- Marianne Nielsen is listed in the NPPES registry with a primary specialty of Chiropractor (Chiropractic Providers).
- Where is Marianne Nielsen located?
- Marianne Nielsen's practice location on file with NPPES is 321 Los Gatos Saratoga Rd, Los Gatos, CA 95030-5310.
- What is Marianne Nielsen's phone number?
- The practice phone number listed in the NPPES registry for Marianne Nielsen is (408) 268-7268.
- Does Marianne Nielsen accept Medicare?
- Marianne Nielsen is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Marianne Nielsen's NPI active?
- Yes — Marianne Nielsen's NPI (1437350949) is active in the NPPES registry as of the last update on 2007-07-08.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.