1. Home
  2. Directory
  3. Pennsylvania
  4. Allentown
  5. Dietitian Registered
  6. NPI Profile

COLLEEN MARIE DEMPSEY-REX RD, LDN
NPI 1538309463
Dietitian, Registered in Allentown, PA

Active since March 05, 2009
1247 S CEDAR CREST BLVD, SUITE 100, ALLENTOWN, PA 18103(610) 770-1800(610) 770-1805 Get Directions Write a Review

NPPES record last updated: June 18, 2014. Verified against the NPPES registry weekly; last sync: October 25, 2026.

About Colleen Marie Dempsey-rex Rd, Ldn NPPES

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

COLLEEN MARIE DEMPSEY-REX RD, LDN (NPI 1538309463) is an individual dietitian, registered in Allentown, Pennsylvania, licensed in Pennsylvania (DN003567) and active in the NPI registry since March 2009.

NPPES Registry Identity

NPI1538309463
Entity TypeIndividualFemale
Primary Taxonomy133V00000X
Provider Legal NameCOLLEEN MARIE DEMPSEY-REXCredential: RD, LDN
Location Address1247 S CEDAR CREST BLVD, SUITE 100Allentown, PA 18103-6298
Mailing Address1247 S Cedar Crest Blvd, Suite 100Allentown, PA 18103-6298 · (610) 770-1800 · Fax (610) 770-1805
Phone(610) 770-1800
Fax(610) 770-1805
Sole ProprietorNo
Enumeration DateMarch 5, 2009
Last NPPES UpdateJune 18, 2014
✔ NPI 1538309463 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 PA · DN003567
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.
1247 S CEDAR CREST BLVD, Allentown, PA 18103
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)

Colleen Marie Dempsey-rex Rd, Ldn is registered in the CMS Provider Enrollment, Chain and Ownership System (PECOS).

Medicare Billing Reassignments

2

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

Lehigh Valley Physician Group
0.1 mi
Infectious Disease
1255 S CEDAR CREST BLVD STE 2100
Allentown, PA 18103
  • Reassigned Medicare billing, Pennsylvania enrollment
  • 2,895 clinicians in this Medicare group
NPI 1457412504 (610) 402-8430
Valley Health Partners Community Health Center
2.6 mi
Federally Qualified Health Center (FQHC)
400 N 17TH ST STE 300
Allentown, PA 18104
  • Reassigned Medicare billing, Pennsylvania enrollment
  • 296 clinicians in this Medicare group
NPI 1912532888 (610) 969-4300

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 19

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

DR. ANDREW DORMESHIAN DMD
Dentist (General Practice)
1247 S CEDAR CREST BLVD, SUITE 300
ALLENTOWN, PA 18103
Lehigh County (610) 628-1228
SMILE KRAFTERS PEDIATRIC, LLC
Dentist (Pediatric Dentistry)
1247 S CEDAR CREST BLVD
ALLENTOWN, PA 18103
Lehigh County (610) 628-1228
AMY EDGAR APRN, CRNP, FNP-C
Nurse Practitioner (Family)
1247 S CEDAR CREST BLVD, SUITE 100
ALLENTOWN, PA 18103
Lehigh County (610) 770-1800
ELIZABETH V LOWE LPCC
Counselor (Professional)
1247 S CEDAR CREST BLVD
ALLENTOWN, PA 18103
Lehigh County (610) 762-6531
LEHIGH VALLEY HOSPITAL
Pharmacy (Home Infusion Therapy Pharmacy)
1247 S CEDAR CREST BLVD, SUITE 105
ALLENTOWN, PA 18103
Lehigh County (610) 402-1852
MR. TRAVIS NEAL O'BRIEN CRNP
Nurse Practitioner (Psychiatric/Mental Health)
1247 S CEDAR CREST BLVD
ALLENTOWN, PA 18103
Lehigh County (610) 770-1800
ADVANTAGE DENTAL, PC
Dentist
1247 S CEDAR CREST BLVD, SUITE 300
ALLENTOWN, PA 18103
Lehigh County (610) 628-1228
CHILDREN'S INTEGRATED CENTER FOR SUCCESS
Nurse Practitioner (Family)
1247 S CEDAR CREST BLVD, SUITE 100
ALLENTOWN, PA 18103
Lehigh County (610) 770-1800

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 Colleen Dempsey-rex's NPI number?

The NPI number for Colleen Dempsey-rex is 1538309463. It was assigned to this individual provider in the NPPES registry on March 5, 2009.

Where is Colleen Dempsey-rex located?

Colleen Dempsey-rex practices at 1247 S Cedar Crest Blvd Suite 100, Allentown, PA 18103. The listed phone number is (610) 770-1800.

What is Colleen Dempsey-rex's specialty?

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

Is Colleen Dempsey-rex enrolled in Medicare?

Yes. Colleen Dempsey-rex is registered in the Medicare PECOS enrollment system.

Which organizations bill Medicare for Colleen Dempsey-rex's services?

According to the CMS Revalidation Reassignment List (October 2026 release), Colleen Dempsey-rex reassigns Medicare benefits to 2 organizations: Lehigh Valley Physician Group (Allentown, PA) and Valley Health Partners Community Health Center (Allentown, PA). 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 Colleen Dempsey-rex'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 Colleen Dempsey-rex was last updated on June 18, 2014. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 12 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.