Individual Healthcare Provider
Ling Dan Twohig, DO
Provider's NPPES record last updated: September 30, 2025
Overview
- Entity Type
- Individual Healthcare Provider
- NPI
- 1750523684
- Primary Specialty
- Internal Medicine — Interventional Cardiology
- Practice Location
- Beloit, Wisconsin
- Sole Proprietor
- Yes
Federal Screening
NPISignal checked this NPI against federal exclusion sources. Results below are based on the NPI number itself — an identifier match, not a name match.
List of Excluded Individuals/Entities (LEIE)
HHS Office of Inspector General
No potential match was identified in NPISignal's indexed List of Excluded Individuals/Entities (LEIE) records as of 2026-09-10.
- Source data
- September 10, 2026
- Records indexed
- 84,001
- Screened
- Sep 20, 2026, 5:37 PM UTC
This reflects only the records NPISignal currently holds and the identity information supplied. It is not a verification of eligibility, licensure, or compliance. Verify decisions that matter against the authoritative source.
SAM.gov Exclusions
U.S. General Services Administration
SAM.gov Exclusions was not checked.
SAM.gov screening is not configured on this deployment. No SAM check has been performed.
- Screened
- Not checked
This is an NPI-based check only. NPISignal does not publish name-based exclusion matches on a provider profile. A shared or similar name is a lead that requires human review, not an identification, and this page is not the place to make one. Run a name-based screening below to see potential matches with the reasons for each.
This reflects only the records NPISignal currently holds and the identity information supplied. It is not a verification of eligibility, licensure, or compliance. Verify decisions that matter against the authoritative source.
Searches OIG LEIE and SAM.gov by name and reviews every potential match.
Specialties & Taxonomies
- Primary
Internal Medicine
Interventional Cardiology
Allopathic & Osteopathic Physicians
An area of medicine within the subspecialty of cardiology, which uses specialized imaging and other diagnostic techniques to evaluate blood flow and pressure in the coronary arteries and chambers of the heart and uses technical procedures and medications to treat abnormalities that impair the function of the cardiovascular system.
Taxonomy code 207RI0011X General Practice
Allopathic & Osteopathic Physicians
A physician who specializes in the general practice of diagnosing, treating, and managing patients with a variety of illnesses and conditions.
Taxonomy code 208D00000X
Provider-Reported License Information
- Internal Medicine (Wisconsin)
- 77847
- Internal Medicine (Indiana)
- 02006049A
- General Practice (Washington)
- OP 60100157
- Internal Medicine (Wisconsin)
- 22007
- Internal Medicine (Wisconsin)
- 22007-875
Practice Locations
Practice Location
Beloit Memorial Hospital
1969 West Hart Rd
Beloit, Wisconsin 53511-2283
Phone: (608) 364-5011
Additional Practice Location
1818 N Meade St
Appleton, Wisconsin 54911-3454
Phone: (920) 731-8900
Fax: (920) 738-5369
Additional Practice Location
201 Independence Dr.
14th Mdg/Sgq
Columbus, Mississippi 39710-0001
Phone: (662) 434-2205
Additional Practice Location
3400 Ministry Pkwy
Weston, Wisconsin 54476-5213
Phone: (715) 383-1000
Record Information
- Enumeration Date
- March 24, 2009
- Provider's NPPES Record Last Updated
- September 30, 2025
- Certification Date
- September 30, 2025
- NPISignal NPPES Dataset
- August 2026
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