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THERESA DIANE ALLEN RN, NNP-BC
NPI 1215450812
Nurse Practitioner - Neonatal, Critical Care in Saint Louis, MO

Active since July 25, 2017PECOS Enrolled
1 CHILDRENS PL STE 5S15, SAINT LOUIS, MO 63110(314) 495-1236 Get Directions Write a Review

NPPES record last updated: July 25, 2017. Verified against the NPPES registry weekly; last sync: November 08, 2026.

About Theresa Diane Allen Rn, Nnp-bc NPPES

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

THERESA DIANE ALLEN RN, NNP-BC (NPI 1215450812) is an individual neonatal, critical care provider in Saint Louis, Missouri, licensed in Missouri (ALL1-0440-9583) and active in the NPI registry since July 2017. She is enrolled in Medicare PECOS.

NPPES Registry Identity

NPI1215450812
Entity TypeIndividualFemale
Primary Taxonomy363LN0005X
Provider Legal NameTHERESA DIANE ALLENCredential: RN, NNP-BC
Location Address1 CHILDRENS PL STE 5S15Saint Louis, MO 63110-1002
Mailing Address1 Childrens Pl Ste 5s15Saint Louis, MO 63110-1002 · (314) 495-1236
Phone(314) 495-1236
Sole ProprietorNo
Enumeration DateJuly 25, 2017
✔ NPI 1215450812 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses

★ Primary SpecialtyNurse Practitioner · Neonatal, Critical CarePhysician Assistants & Advanced Practice Nursing Providers
Taxonomy Code363LN0005X
License✔ Licensed in MO · ALL1-0440-9583
1 CHILDRENS PL STE 5S15, Saint Louis, MO 63110
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Medicare Participation & PECOS CMS

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

Medicare Enrollment Status

✔

Enrolled in Medicare (PECOS)

Theresa Diane Allen Rn, Nnp-bc 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

2

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

Memorial Physician Services
85 mi
Family Medicine
3132 OLD JACKSONVILLE RD
Springfield, IL 62704
  • Reassigned Medicare billing, Illinois enrollment
  • 150 clinicians in this Medicare group
NPI 1174877930 (217) 862-0800
Siu Physicians & Surgeons, Inc
87 mi
Endocrinology, Diabetes & Metabolism
201 E MADISON ST STE 328
Springfield, IL 62702
  • Reassigned Medicare billing, Illinois enrollment
  • 645 clinicians in this Medicare group
NPI 1558385989 (217) 545-8000

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 63110 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
$86.32 typical visit price
range $55.65 – $169.38
Typical copayment $21.58 (range $13.91 – $42.34)
Most-billed visit code 99203
Established Patient
$98.37 typical visit price
range $17.76 – $137.92
Typical copayment $24.59 (range $4.44 – $34.48)
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.

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 Theresa Allen's NPI number?

The NPI number for Theresa Allen is 1215450812. It was assigned to this individual provider in the NPPES registry on July 25, 2017.

Where is Theresa Allen located?

Theresa Allen practices at 1 Childrens Pl Ste 5s15, Saint Louis, MO 63110. The listed phone number is (314) 495-1236.

What is Theresa Allen's specialty?

The primary specialty registered for this NPI is Nurse Practitioner, specializing in Neonatal, Critical Care, with taxonomy code 363LN0005X.

Is Theresa Allen enrolled in Medicare?

Yes. Theresa Allen is registered in the Medicare PECOS enrollment system.

Which organizations bill Medicare for Theresa Allen's services?

According to the CMS Revalidation Reassignment List (October 2026 release), Theresa Allen reassigns Medicare benefits to 2 organizations: Memorial Physician Services (Springfield, IL) and Siu Physicians & Surgeons, Inc (Springfield, IL). 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 Theresa Allen'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 Theresa Allen was last updated on July 25, 2017. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 9 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.