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INTERNISTS LTD
NPI 1952478299
Internal Medicine in New Berlin, WI

Active since November 30, 2006
12555 W NATIONAL AVE, STE 200, NEW BERLIN, WI 53151(262) 754-2555(262) 754-2552 Get Directions Write a Review

NPPES record last updated: March 19, 2025. Verified against the NPPES registry weekly; last sync: October 25, 2026.

Record update history: Mar 19, 2025, Jul 18, 2024 (2 updates tracked since 2024).

About Internists Ltd NPPES

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

INTERNISTS LTD (NPI 1952478299) is a healthcare organization registered as an internal medicine in New Berlin, Wisconsin and active in the NPI registry since November 2006. The organization lists Margaret Podlisecki, Office Manager, as its authorized official.

NPPES Registry Identity

NPI1952478299
Entity TypeOrganization
Primary Taxonomy207R00000X
Legal Business NameINTERNISTS LTD
Location Address12555 W NATIONAL AVE, STE 200New Berlin, WI 53151
Mailing AddressPo Box 9126Belfast, ME 04915-9126 · (800) 868-1792 · Fax (262) 754-2552
Phone(262) 754-2555
Fax(262) 754-2552
Organization SubpartNo
Authorized OfficialMargaret PodliseckiOffice Manager · (262) 754-2555
Enumeration DateNovember 30, 2006
Last NPPES UpdateMarch 19, 20252 updates tracked since enumeration
NPPES CertifiedMarch 19, 2025
✔ NPI 1952478299 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses

★ Primary SpecialtyInternal MedicineAllopathic & Osteopathic Physicians
Taxonomy Code207R00000X
License✔ Licensed in WI · 38648
Definition
A physician who provides long-term, comprehensive care in the office and the hospital, managing both common and complex illness of adolescents, adults and the elderly. Internists are trained in the diagnosis and treatment of cancer, infections and diseases affecting the heart, blood, kidneys, joints and digestive, respiratory and vascular systems. They are also trained in the essentials of primary care internal medicine, which incorporates an understanding of disease prevention, wellness, substance abuse, mental health and effective treatment of common problems of the eyes, ears, skin, nervous system and reproductive organs.
12555 W NATIONAL AVE, New Berlin, WI 53151
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Other Identifiers 1

Medicaid32738300WI

Group Practice 1

Group TaxonomyThis provdier is a business group of one or more individual practitioners, all of who practice with the same area of specialization.193400000X SINGLE SPECIALTY GROUP

Accepted Insurance

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

Medicare Participation & PECOS CMS

Medicare enrollment and the clinicians who bill Medicare through this organization, from CMS.

Medicare Enrollment Status

✔

Enrolled in Medicare (PECOS)

Internists Ltd is registered in the CMS Provider Enrollment, Chain and Ownership System (PECOS).

Clinicians Billing Medicare Through This Organization

Medicare enrollment records show 1 clinician reassigns Medicare billing to Internists Ltd, which bills Medicare for the services this clinician delivers.

Clinician (1)

Steve Chang, MD
Internal Medicine
NPI 1295897569
12555 W NATIONAL AVE STE 200
New Berlin, WI 53151
(262) 754-2555
✔ PECOS✔ Accepts MedicareSame address

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

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 Internists Ltd's NPI number?

The NPI number for Internists Ltd is 1952478299. It was assigned to this organization in the NPPES registry on November 30, 2006.

Where is Internists Ltd located?

Internists Ltd is located at 12555 W National Ave Ste 200, New Berlin, WI 53151. The listed phone number is (262) 754-2555.

What is Internists Ltd's specialty?

The primary specialty registered for this NPI is Internal Medicine with taxonomy code 207R00000X.

Is Internists Ltd enrolled in Medicare?

Yes. Internists Ltd is registered in the Medicare PECOS enrollment system.

How many clinicians bill Medicare through Internists Ltd?

According to the CMS Revalidation Reassignment List (October 2026 release), 1 clinician (Internal Medicine) reassigns their Medicare billing to Internists Ltd. A 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 the clinician's services. Reassignment records can lag staffing changes; confirm a current affiliation with the organization.

What insurance does Internists Ltd accept?

Health plans from CareSource (Common Ground Healthcare) list Internists Ltd 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 Internists Ltd was last updated on March 19, 2025. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 19 months 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.