NPI Portal NPI Lookup & Verification

Type 2 · Organization ✓ Active NPI ✓ Valid NPI checksum

Allan W. Torkelson, M.D., S.C.

Hematology & Oncology Physician in Mequon, WI · enumerated 2006 · authorized official Allan Torkelson, President.

Data current as of Jul 13, 2026 · sourced from CMS NPPES

National Provider Identifier

1639254022

Verified

See something wrong? Report a correction

Registry record

Entity type Organization (Type 2)
Legal business name Allan W. Torkelson, M.D., S.C.
Practice address 13111 N Port Washington Rd, Mequon, WI, 53097
Phone (262) 243-7410
Fax (262) 243-7482
Enumeration date Oct 26, 2006
Last updated in NPPES Aug 22, 2020

Taxonomy & classification

207RH0003X Hematology & Oncology Physician Allopathic & Osteopathic Physicians · License 20837 (WI) Primary

Authorized official

Name Allan Torkelson
Title President
Phone (262) 243-7410

Other identifiers

Identifier Type State Issuer
30459200 Medicaid WI -

What is an NPI number?

A National Provider Identifier (NPI) is a unique 10-digit number that CMS assigns to every U.S. healthcare provider and organization under HIPAA. Type 1 NPIs identify individual providers; Type 2 NPIs identify organizations. The NPI appears on insurance claims, prescriptions, and credentialing paperwork, and never changes, even if the provider moves or changes specialty.

Read the full guide → Validate an NPI →

Frequently asked questions

What is a Type 2 NPI?
A Type 2 NPI identifies an organization (group practice, hospital, pharmacy, lab), while Type 1 NPIs identify individual providers. Organizations bill under their Type 2 NPI.
What type of organization is Allan W. Torkelson, M.D., S.C.?
Allan W. Torkelson, M.D., S.C. is registered in NPPES as a Hematology & Oncology Physician (its primary provider taxonomy).

Providers at this address

Browse all →

Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2020-08-22.