NPI Portal NPI Lookup & Verification

Type 2 · Organization ✓ Active NPI ✓ Valid NPI checksum

Ludag LLC

Radiation Oncology Physician in Merrillville, IN · enumerated 2006 · authorized official Robert Woodburn, Owner.

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

National Provider Identifier

1336195353

Verified

See something wrong? Report a correction

Registry record

Entity type Organization (Type 2)
Legal business name Ludag LLC
Practice address 8701 Broadway, Merrillville, IN, 46410
Phone (574) 271-2558
Fax (574) 273-1137
Enumeration date May 25, 2006
Last updated in NPPES Jan 14, 2025

Taxonomy & classification

2085R0001X Radiation Oncology Physician Allopathic & Osteopathic Physicians Primary

Authorized official

Name Robert Woodburn
Title Owner
Phone (219) 763-2246

Other identifiers

Identifier Type State Issuer
200397270B Medicaid IN -
200397270A Medicaid IN -

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

How current is this record?
Data comes from the CMS NPPES public dissemination file; this record was last updated in NPPES on 2025-01-14. Verify at npiregistry.cms.hhs.gov.
Where is Ludag LLC located?
The practice location on file with NPPES is in Merrillville, IN.

Providers at this address

Browse all →

Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2025-01-14.