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PETER DAVID HOLZWARTH MD
NPI 1629001912
Pediatrics in Neenah, WI

Active since July 09, 2006PECOS Enrolled
120 SECOND STREET, NEENAH, WI 54956(920) 969-7900(920) 969-7979 Get Directions Write a Review

NPPES record last updated: January 14, 2019. Verified against the NPPES registry weekly; last sync: October 25, 2026.

About Peter David Holzwarth Md NPPES

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

PETER DAVID HOLZWARTH MD (NPI 1629001912) is an individual pediatrics provider in Neenah, Wisconsin, licensed in Wisconsin (35954) and active in the NPI registry since July 2006. He is enrolled in Medicare PECOS.

NPPES Registry Identity

NPI1629001912
Entity TypeIndividualMale
Primary Taxonomy208000000X
Provider Legal NamePETER DAVID HOLZWARTHCredential: MD
Location Address120 SECOND STREETNeenah, WI 54956-2883
Mailing Address9000 W Wisconsin Ave # Ms 958Milwaukee, WI 53226-4874 · (414) 266-7615 · Fax (414) 266-6238
Phone(920) 969-7900
Fax(920) 969-7979
Sole ProprietorNo
Enumeration DateJuly 9, 2006
Last NPPES UpdateJanuary 14, 2019
✔ NPI 1629001912 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses

★ Primary SpecialtyPediatricsAllopathic & Osteopathic Physicians
Taxonomy Code208000000X
License✔ Licensed in WI · 35954
Definition
A pediatrician is concerned with the physical, emotional and social health of children from birth to young adulthood. Care encompasses a broad spectrum of health services ranging from preventive healthcare to the diagnosis and treatment of acute and chronic diseases. A pediatrician deals with biological, social and environmental influences on the developing child, and with the impact of disease and dysfunction on development.
120 SECOND STREET, Neenah, WI 54956
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Other Identifiers 1

Medicaid1629001912WI

Accepted Insurance

The full list of accepted plans is on the Insurance tab. Issuers include Aspirus Health Plan, CareSource (Common Ground Healthcare).Insurance ›

Medicare Participation & PECOS CMS

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

Medicare Enrollment Status

✔

Enrolled in Medicare (PECOS)

Peter David Holzwarth Md 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

3

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

Ascension Medical Group-Fox Valley Wisconsin, Inc
0.7 mi
Multi-Specialty
101 MAIN ST
Neenah, WI 54956
  • Reassigned Medicare billing, Wisconsin enrollment
  • 444 clinicians in this Medicare group
NPI 1730126392 (920) 727-4200
Thedacare, Incorporated
2.9 mi
Counselor
1095 MIDWAY RD
Menasha, WI 54952
  • Reassigned Medicare billing, Wisconsin enrollment
  • 988 clinicians in this Medicare group
NPI 1306959515 (920) 720-2300
Ascension NE Wisconsin, Inc
4.6 mi
General Acute Care Hospital
1506 S ONEIDA ST
Appleton, WI 54915
  • Reassigned Medicare billing, Wisconsin enrollment
  • 194 clinicians in this Medicare group
NPI 1407803638 (920) 738-2000

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 54956 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
$82.92 typical visit price
range $53.90 – $163.24
Typical copayment $20.73 (range $13.47 – $40.81)
Most-billed visit code 99203
Established Patient
$95.41 typical visit price
range $17.40 – $133.76
Typical copayment $23.85 (range $4.35 – $33.44)
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 Peter Holzwarth's NPI number?

The NPI number for Peter Holzwarth is 1629001912. It was assigned to this individual provider in the NPPES registry on July 9, 2006.

Where is Peter Holzwarth located?

Peter Holzwarth practices at 120 Second Street, Neenah, WI 54956. The listed phone number is (920) 969-7900.

What is Peter Holzwarth's specialty?

The primary specialty registered for this NPI is Pediatrics with taxonomy code 208000000X.

Is Peter Holzwarth enrolled in Medicare?

Yes. Peter Holzwarth is registered in the Medicare PECOS enrollment system.

Which organizations bill Medicare for Peter Holzwarth's services?

According to the CMS Revalidation Reassignment List (October 2026 release), Peter Holzwarth reassigns Medicare benefits to 3 organizations: Ascension Medical Group-Fox Valley Wisconsin, Inc (Neenah, WI), Thedacare, Incorporated (Menasha, WI) and Ascension NE Wisconsin, Inc (Appleton, WI). 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 Peter Holzwarth's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.

What insurance does Peter Holzwarth accept?

Health plans from Aspirus Health Plan and CareSource (Common Ground Healthcare) list Peter Holzwarth 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 Peter Holzwarth was last updated on January 14, 2019. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 7 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.