CHELSEA L. TIEDEMANN FNP
NPI 1912320433
Nurse Practitioner in Oxnard, CA

Q: What is Chelsea Tiedemann's NPI number?

The NPI number for Chelsea Tiedemann is 1912320433. It was assigned to this individual provider in the NPPES registry on February 4, 2014. The provider is also known as Chelsea L. Routzahn Fnp.

Q: What is Chelsea Tiedemann's specialty?

The primary specialty registered for this NPI is Nurse Practitioner with taxonomy code 363L00000X.

Q: When was this NPI record last updated?

The NPPES record for Chelsea Tiedemann was last updated on December 22, 2021. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 4 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.

Active since February 04, 2014PECOS Enrolled

2921 SAVIERS RD, OXNARD, CA 93033(805) 487-5588(805) 487-5589 Get Directions Write a Review

NPPES record last updated: December 22, 2021. Verified against the NPPES registry weekly; last sync: October 25, 2026.

Record update history: Dec 22, 2021, Jan 8, 2018 (2 updates tracked since 2018).

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About Chelsea L. Tiedemann Fnp NPPES

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

CHELSEA L. TIEDEMANN FNP (NPI 1912320433) is an individual nurse practitioner in Oxnard, California, licensed in California (23773) and active in the NPI registry since February 2014. She is enrolled in Medicare PECOS.

NPPES Registry Identity

NPI1912320433

Entity TypeIndividualFemale

Primary Taxonomy363L00000X

Provider Legal NameCHELSEA L. TIEDEMANNCredential: FNP

Location Address2921 SAVIERS RDOxnard, CA 93033-5314

Mailing Address1172 N Maclay AveSan Fernando, CA 91340-1328 · (818) 898-1388 · Fax (818) 270-9590

Phone(805) 487-5588

Fax(805) 487-5589

Sole ProprietorNo

Enumeration DateFebruary 4, 2014

Last NPPES UpdateDecember 22, 20212 updates tracked since enumeration

NPPES CertifiedDecember 22, 2021

✔ NPI 1912320433 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses

★ Primary SpecialtyNurse PractitionerPhysician Assistants & Advanced Practice Nursing Providers

Taxonomy Code363L00000X

License✔ Licensed in CA · 23773

Definition

(1) A registered nurse provider with a graduate degree in nursing prepared for advanced practice involving independent and interdependent decision making and direct accountability for clinical judgment across the health care continuum or in a certified specialty. (2) A registered nurse who has completed additional training beyond basic nursing education and who provides primary health care services in accordance with state nurse practice laws or statutes. Tasks performed by nurse practitioners vary with practice requirements mandated by geographic, political, economic, and social factors. Nurse practitioner specialists include, but are not limited to, family nurse practitioners, gerontological nurse practitioners, pediatric nurse practitioners, obstetric-gynecologic nurse practitioners, and school nurse practitioners.

2921 SAVIERS RD, Oxnard, CA 93033

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Other Names 1

Other Name (5)Chelsea L. Routzahn Fnp

Medicare Participation & PECOS CMS

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

Medicare Enrollment Status

✔

Enrolled in Medicare (PECOS)

Chelsea L. Tiedemann Fnp is registered in the CMS Provider Enrollment, Chain and Ownership System (PECOS).

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

Medicare enrollment records show Chelsea Tiedemann reassigns Medicare billing to 3 organizations. Each organization bills Medicare for the services this provider delivers there; the nearest is listed first.

Community Memorial Health System

Same address

Multi-Specialty

2921 SAVIERS RD
Oxnard, CA 93033

Reassigned Medicare billing, California enrollment
267 clinicians in this Medicare group

NPI 1740228345 (805) 487-5588

Southern California Permanente Medical Group

3.6 mi

Health Maintenance Organization

2103 E GONZALES RD
Oxnard, CA 93036

Reassigned Medicare billing, California enrollment
13,921 clinicians in this Medicare group

NPI 1275756652 (805) 650-4700

Northeast Valley Health Corporation

33 mi

Federally Qualified Health Center (FQHC)

7107 REMMET AVE
Canoga Park, CA 91303

Reassigned Medicare billing, California enrollment
218 clinicians in this Medicare group

NPI 1740281120 (818) 340-3570

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

Physician Visit Costs CMS claims · ZIP area

Typical Medicare office-visit costs in the 93033 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

$95.28 typical visit price

range $62.32 – $185.36

Typical copayment $23.82 (range $15.58 – $46.34)

Most-billed visit code 99203

Established Patient

$108.74 typical visit price

range $20.68 – $151.85

Typical copayment $27.18 (range $5.17 – $37.96)

Most-billed visit code 99214

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 13

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

DANILO CINCO BERNAL NP

Nurse Practitioner (Family)