DR. CALLIE M WILLIAMS DNP, ARNP, CPNP-PC
NPI 1073006698
Nurse Practitioner - Pediatrics in Altoona, IA

Q: What is Callie Williams's NPI number?

The NPI number for Callie Williams is 1073006698. It was assigned to this individual provider in the NPPES registry on June 8, 2018. The provider is also known as Callie Marie Adreon.

Q: What is Callie Williams's specialty?

The primary specialty registered for this NPI is Nurse Practitioner, specializing in Pediatrics, with taxonomy code 363LP0200X.

Q: When was this NPI record last updated?

The NPPES record for Callie Williams 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 June 08, 2018PECOS Enrolled

700 1ST AVE S STE B, ALTOONA, IA 50009(515) 967-8887(833) 913-0981 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, Nov 27, 2021, Oct 14, 2021 (3 updates tracked since 2021).

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About Dr. Callie M Williams Dnp, Arnp, Cpnp-pc NPPES

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

DR. CALLIE M WILLIAMS DNP, ARNP, CPNP-PC (NPI 1073006698) is an individual pediatrics provider in Altoona, Iowa, licensed in Iowa (C141543) and active in the NPI registry since June 2018. She is enrolled in Medicare PECOS and maintains a secondary practice location in Des Moines.

NPPES Registry Identity

NPI1073006698

Entity TypeIndividualFemale

Primary Taxonomy363LP0200X

Provider Legal NameDR. CALLIE M WILLIAMSCredential: DNP, ARNP, CPNP-PC

Location Address700 1ST AVE S STE BAltoona, IA 50009-1717

Mailing Address700 1st Ave S Ste BAltoona, IA 50009-1717 · (515) 967-8887 · Fax (833) 913-0981

Phone(515) 967-8887

Fax(833) 913-0981

Sole ProprietorNo

Enumeration DateJune 8, 2018

Last NPPES UpdateDecember 22, 20213 updates tracked since enumeration

NPPES CertifiedDecember 22, 2021

✔ NPI 1073006698 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses

★ Primary SpecialtyNurse Practitioner · PediatricsPhysician Assistants & Advanced Practice Nursing Providers

Taxonomy Code363LP0200X

License✔ Licensed in IA · C141543

700 1ST AVE S STE B, Altoona, IA 50009

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Other Names 1

Former Name (1)Callie Marie Adreon

Secondary Practice Location 1

Location 11200 Pleasant StDes Moines, IA 50309-1406 · Phone (515) 241-6161

Other Identifiers 1

OtherC141543IA · Arnp License

Accepted Insurance

The full list of accepted plans is on the Insurance tab. Issuers include Oscar Insurance Company, UnitedHealthcare, Wellmark Health Plan of Iowa, 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)

Dr. Callie M Williams Dnp, Arnp, Cpnp-pc 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 Callie Williams reassigns Medicare billing to 3 organizations. Each organization bills Medicare for the services this provider delivers there; the nearest is listed first.

Unitypoint Health - Marshalltown

36 mi

Emergency Medicine

55 UNITYPOINT WAY
Marshalltown, IA 50158

Reassigned Medicare billing, Iowa enrollment
214 clinicians in this Medicare group

NPI 1164957593 (641) 754-5145

Trinity Regional Medical Center

60 mi

End-Stage Renal Disease (ESRD) Treatment

1610 COLLINS ST, SUITE D
Webster City, IA 50595

Reassigned Medicare billing, Iowa enrollment
387 clinicians in this Medicare group

NPI 1568650174 (515) 832-1667

Allen Memorial Hospital Corporation

84 mi

Emergency Medicine

1825 LOGAN AVE
Waterloo, IA 50703

Reassigned Medicare billing, Iowa enrollment
273 clinicians in this Medicare group

NPI 1346292521 (319) 235-3941

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 50009 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

$81.84 typical visit price

range $52.96 – $161.40

Typical copayment $20.46 (range $13.24 – $40.35)

Most-billed visit code 99203

Established Patient

$94.05 typical visit price

range $16.91 – $131.98

Typical copayment $23.51 (range $4.22 – $32.99)

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 2

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

JENNIFER L HILL ARNP

Nurse Practitioner (Pediatrics)

700 1ST AVE S STE B
ALTOONA, IA 50009

Polk County (515) 967-8887

ELIANA KNUDSON

Family Medicine

700 1ST AVE S STE B
ALTOONA, IA 50009

Polk County (515) 967-8887

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 Callie Williams's NPI number?

The NPI number for Callie Williams is 1073006698. It was assigned to this individual provider in the NPPES registry on June 8, 2018. The provider is also known as Callie Marie Adreon.

Where is Callie Williams located?

Callie Williams practices at 700 1st Ave S Ste B, Altoona, IA 50009. The listed phone number is (515) 967-8887.

What is Callie Williams's specialty?

The primary specialty registered for this NPI is Nurse Practitioner, specializing in Pediatrics, with taxonomy code 363LP0200X.

Is Callie Williams enrolled in Medicare?

Yes. Callie Williams is registered in the Medicare PECOS enrollment system.

Which organizations bill Medicare for Callie Williams's services?

According to the CMS Revalidation Reassignment List (October 2026 release), Callie Williams reassigns Medicare benefits to 3 organizations: Unitypoint Health - Marshalltown (Marshalltown, IA), Trinity Regional Medical Center (Webster City, IA) and Allen Memorial Hospital Corporation (Waterloo, IA). 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 Callie Williams's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.

What insurance does Callie Williams accept?

Health plans from Oscar Insurance Company, UnitedHealthcare and Wellmark Health Plan of Iowa, Inc. list Callie Williams 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 Callie Williams 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.