1. Home
  2. Directory
  3. Illinois
  4. Centralia
  5. Internal Medicine
  6. NPI Profile

STEPHEN T ANG MD SC
NPI 1427331891
Internal Medicine - Gastroenterology in Centralia, IL

Active since September 22, 2011
1054 MARTIN LUTHER KING DR, STE 120, CENTRALIA, IL 62801(618) 532-1688(618) 436-8081 Get Directions Write a Review

NPPES record last updated: October 27, 2011. Verified against the NPPES registry weekly; last sync: October 25, 2026.

About Stephen T Ang Md Sc NPPES

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

STEPHEN T ANG MD SC (NPI 1427331891) is a healthcare organization registered as a gastroenterology in Centralia, Illinois and active in the NPI registry since September 2011. The organization lists Stephen Ang, Physician, as its authorized official.

NPPES Registry Identity

NPI1427331891
Entity TypeOrganization
Primary Taxonomy207RG0100X
Legal Business NameSTEPHEN T ANG MD SC
Location Address1054 MARTIN LUTHER KING DR, STE 120Centralia, IL 62801-3000
Mailing Address1054 Martin Luther King Dr, Ste 120Centralia, IL 62801-3000 · (618) 532-1688 · Fax (618) 436-8081
Phone(618) 532-1688
Fax(618) 436-8081
Organization SubpartNo
Authorized OfficialStephen AngPhysician · (618) 532-1688
Enumeration DateSeptember 22, 2011
Last NPPES UpdateOctober 27, 2011
✔ NPI 1427331891 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses

★ Primary SpecialtyInternal Medicine · GastroenterologyAllopathic & Osteopathic Physicians
Taxonomy Code207RG0100X
Definition
An internist who specializes in diagnosis and treatment of diseases of the digestive organs including the stomach, bowels, liver and gallbladder. This specialist treats conditions such as abdominal pain, ulcers, diarrhea, cancer and jaundice and performs complex diagnostic and therapeutic procedures using endoscopes to visualize internal organs.
1054 MARTIN LUTHER KING DR, Centralia, IL 62801
Open in Google Maps ↗

Other Identifiers 1

Medicaid036088477IL

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 Ambetter Health, Ambetter Health of Delaware.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)

Stephen T Ang Md Sc 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 Stephen T Ang MD Sc, which bills Medicare for the services this clinician delivers.

Clinician (1)

Stephen Ang, MD
Gastroenterology
NPI 1346251071
1054 M L KING DR SUITE 120
Centralia, IL 62801
(618) 532-1688
✔ PECOS✔ Accepts Medicare1.0 mi

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 Stephen T Ang MD Sc's NPI number?

The NPI number for Stephen T Ang MD Sc is 1427331891. It was assigned to this organization in the NPPES registry on September 22, 2011.

Where is Stephen T Ang MD Sc located?

Stephen T Ang MD Sc is located at 1054 Martin Luther King Dr Ste 120, Centralia, IL 62801. The listed phone number is (618) 532-1688.

What is Stephen T Ang MD Sc's specialty?

The primary specialty registered for this NPI is Internal Medicine, specializing in Gastroenterology, with taxonomy code 207RG0100X.

Is Stephen T Ang MD Sc enrolled in Medicare?

Yes. Stephen T Ang MD Sc is registered in the Medicare PECOS enrollment system.

How many clinicians bill Medicare through Stephen T Ang MD Sc?

According to the CMS Revalidation Reassignment List (October 2026 release), 1 clinician (Gastroenterology) reassigns their Medicare billing to Stephen T Ang MD Sc. 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 Stephen T Ang MD Sc accept?

Health plans from Ambetter Health and Ambetter Health of Delaware list Stephen T Ang MD Sc 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 Stephen T Ang MD Sc was last updated on October 27, 2011. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 15 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.