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ELIZABETH ANN POSEK RD
NPI 1386084960
Dietitian, Registered in Phoenix, AZ

Active since June 27, 2013
3141 N 3RD AVE, PHOENIX, AZ 85013(602) 914-1520(602) 914-1521 Get Directions Write a Review

NPPES record last updated: June 27, 2013. Verified against the NPPES registry weekly; last sync: November 01, 2026.

About Elizabeth Ann Posek Rd NPPES

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

ELIZABETH ANN POSEK RD (NPI 1386084960) is an individual dietitian, registered in Phoenix, Arizona, licensed in California (1097116) and active in the NPI registry since June 2013.

NPPES Registry Identity

NPI1386084960
Entity TypeIndividualFemale
Primary Taxonomy133V00000X
Provider Legal NameELIZABETH ANN POSEKCredential: RD
Location Address3141 N 3RD AVEPhoenix, AZ 85013-4360
Mailing Address2929 E Thomas Rd, Credentialing DepartmentPhoenix, AZ 85016-8034 · (602) 470-5043 · Fax (602) 470-5064
Phone(602) 914-1520
Fax(602) 914-1521
Sole ProprietorNo
Enumeration DateJune 27, 2013
✔ NPI 1386084960 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses

★ Primary SpecialtyDietitian, RegisteredDietary & Nutritional Service Providers
Taxonomy Code133V00000X
License✔ Licensed in CA · 1097116
Definition
A Registered Dietitian (RD)/Registered Dietitian Nutritionist (RDN) is an individual uniquely trained in the science of nutrition and practice of dietetics to design and provide medical nutrition therapy (MNT) and other evidence-based applications of the Nutrition Care Process (NCP) that exemplify the profession's systematic approach to providing high quality nutrition care. Registered dietitians provide MNT for the purpose of disease prevention or management, or to treat or rehabilitate an illness, injury, or condition, with the use of specific, indicated physical and cognitive nutrition care services comprised of one or more of the following aspects of the NCP: nutrition assessment/reassessment, nutrition diagnosis, nutrition intervention (e.g., nutrition counseling, therapeutic diet ordering, and nutrition education) and nutrition monitoring and evaluation.
3141 N 3RD AVE, Phoenix, AZ 85013
Open in Google Maps ↗

Accepted Insurance

The full list of accepted plans is on the Insurance tab. Issuers include Blue Cross Blue Shield of Arizona, Oscar Health Plan, Inc..Insurance ›

Medicare Participation & PECOS CMS

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

Medicare Enrollment Status

✔

Enrolled in Medicare (PECOS)

Elizabeth Ann Posek Rd is registered in the CMS Provider Enrollment, Chain and Ownership System (PECOS).

Medicare Billing Reassignments

2

Medicare enrollment records show Elizabeth Posek reassigns Medicare billing to 2 organizations. Each organization bills Medicare for the services this provider delivers there; the nearest is listed first.

Phoenix Children's Hospital
2.1 mi
Pediatrics
1919 E THOMAS RD
Phoenix, AZ 85016
  • Reassigned Medicare billing, Arizona enrollment
  • 1,416 clinicians in this Medicare group
NPI 1922112044 (602) 933-1000
District Medical Group, Inc
3.4 mi
Pulmonary Disease
2525 E ROOSEVELT ST, MED CLINIC - PULMONARY
Phoenix, AZ 85008
  • Reassigned Medicare billing, Arizona enrollment
  • 1,490 clinicians in this Medicare group
NPI 1700119815 (602) 344-1095

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

Other Providers at the Same Location NPPES 20

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

DR. PATRICIA RANJINEE HALPE MD
Pediatrics
3141 N 3RD AVE
PHOENIX, AZ 85013
Maricopa County (602) 914-1520
BONNIE HARTLEY LCSW
Social Worker (Clinical)
3141 N 3RD AVE
PHOENIX, AZ 85013
Maricopa County (602) 914-1520
LAUREN M SHOEMAKER SLP
Speech-Language Pathologist
3141 N 3RD AVE
PHOENIX, AZ 85013
Maricopa County (602) 914-1520
DOMINICA WILHEMINA DIEFFENBACH RD
Dietitian, Registered
3141 N 3RD AVE
PHOENIX, AZ 85013
Maricopa County (602) 914-1520
MARIE LANZON PNP
Nurse Practitioner (Pediatrics)
3141 N 3RD AVE
PHOENIX, AZ 85013
Maricopa County (602) 914-1520
LINDA SUE BONDS NP
Nurse Practitioner (Adult Health)
3141 N 3RD AVE
PHOENIX, AZ 85013
Maricopa County (602) 571-1281
MRS. SHEELAGH WILLETT ANP-C
Nurse Practitioner (Adult Health)
3141 N 3RD AVE
PHOENIX, AZ 85013
Maricopa County (602) 571-3903
TERRI ALEJANDRO RN, BSN, PHN, HN-BC
Registered Nurse (Case Management)
3141 N 3RD AVE
PHOENIX, AZ 85013
Maricopa County (866) 267-1701

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 Elizabeth Posek's NPI number?

The NPI number for Elizabeth Posek is 1386084960. It was assigned to this individual provider in the NPPES registry on June 27, 2013.

Where is Elizabeth Posek located?

Elizabeth Posek practices at 3141 N 3rd Ave, Phoenix, AZ 85013. The listed phone number is (602) 914-1520.

What is Elizabeth Posek's specialty?

The primary specialty registered for this NPI is Dietitian, Registered with taxonomy code 133V00000X.

Is Elizabeth Posek enrolled in Medicare?

Yes. Elizabeth Posek is registered in the Medicare PECOS enrollment system.

Which organizations bill Medicare for Elizabeth Posek's services?

According to the CMS Revalidation Reassignment List (October 2026 release), Elizabeth Posek reassigns Medicare benefits to 2 organizations: Phoenix Children's Hospital (Phoenix, AZ) and District Medical Group, Inc (Phoenix, AZ). Each 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 Elizabeth Posek's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.

What insurance does Elizabeth Posek accept?

Health plans from Blue Cross Blue Shield of Arizona and Oscar Health Plan, Inc. list Elizabeth Posek as in-network in at least one marketplace plan. Coverage varies by plan and year; verify with the insurer or the provider before a visit.

When was this NPI record last updated?

The NPPES record for Elizabeth Posek was last updated on June 27, 2013. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 13 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.