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MICHIGAN GASTROENTEROLOGY INSTITUTE
NPI 1699880591
Internal Medicine - Gastroenterology in East Lansing, MI

Active since August 20, 2006
1650 RAMBLEWOOD DR STE 100, EAST LANSING, MI 48823(517) 332-1200(517) 351-7122 Get Directions Write a Review

NPPES record last updated: May 3, 2022. Verified against the NPPES registry weekly; last sync: November 01, 2026.

Record update history: May 3, 2022, Jun 25, 2021 (2 updates tracked since 2021).

About Michigan Gastroenterology Institute NPPES

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

MICHIGAN GASTROENTEROLOGY INSTITUTE (NPI 1699880591) is a healthcare organization registered as a gastroenterology in East Lansing, Michigan and active in the NPI registry since August 2006. The organization maintains a secondary practice location in Lansing and lists Mary Michalek, Billing Manager, as its authorized official.

NPPES Registry Identity

NPI1699880591
Entity TypeOrganization
Primary Taxonomy207RG0100X
Legal Business NameTROY GASTROENTEROLOGY, PC
Location Address1650 RAMBLEWOOD DR STE 100East Lansing, MI 48823-7396
Mailing Address1650 Ramblewood Dr Ste 100East Lansing, MI 48823-7396 · (517) 332-1200 · Fax (517) 351-7122
Phone(517) 332-1200
Fax(517) 351-7122
Organization SubpartNo
Authorized OfficialMary MichalekBilling Manager · (586) 726-8423
Enumeration DateAugust 20, 2006
Last NPPES UpdateMay 3, 20222 updates tracked since enumeration
NPPES CertifiedMay 3, 2022
✔ NPI 1699880591 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses 2

★ 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.
Also ListedColon & Rectal SurgeryTaxonomy 208C00000X
1650 RAMBLEWOOD DR STE 100, East Lansing, MI 48823
Open in Google Maps ↗

Other Names 1

Doing Business AsMichigan Gastroenterology Institute

Secondary Practice Location 1

Location 11627 Lake Lansing Rd Ste 100Lansing, MI 48912-3788 · Phone (517) 332-1200

Other Identifiers 2

Other500C311470MI · Bcbsm
OtherOC31060MI · Bcbsm

Group Practice 2

Group TaxonomyThis provider is a business group of one or more individual practitioners, who practice with different areas of specialization.193200000X MULTI-SPECIALTY GROUP
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 from Buckeye Health Plan, Ambetter from Meridian, Ambetter Health and more.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)

Michigan Gastroenterology Institute is registered in the CMS Provider Enrollment, Chain and Ownership System (PECOS).

Clinicians Billing Medicare Through This Organization

49

Medicare enrollment records show 49 clinicians reassign Medicare billing to Michigan Gastroenterology Institute, which bills Medicare for the services they deliver. Of these, 9 practice at this address and 15 within 10 miles. Listed here are the 20 practicing nearest to this location.

Clinicians by Medicare Specialty 7

Gastroenterology31
Nurse Practitioner11
Colorectal Surgery (Proctology)2
Pathology2
Certified Registered Nurse Anesthetist (CRNA)1
General Surgery1
Internal Medicine1

Nearest to this location (20)

See all 49
Radoslav Coleski, MD, PHD
Gastroenterology
NPI 1396041067
1650 RAMBLEWOOD DR
East Lansing, MI 48823
(517) 332-1200
✔ PECOSSame address
Tadd Hiatt, MD
Gastroenterology
NPI 1457407074
1650 RAMBLEWOOD DR STE 300
East Lansing, MI 48823
(517) 332-1200
✔ PECOS✔ Accepts MedicareSame address
Dorian Jones, MD
Internal Medicine
NPI 1508157702
1650 RAMBLEWOOD DR STE 200
East Lansing, MI 48823
(517) 332-1200
✔ PECOS✔ Accepts MedicareSame address
Jannel Lee-Allen, M.D.
Gastroenterology
NPI 1700240819
1650 RAMBLEWOOD DR STE 100
East Lansing, MI 48823
(517) 332-1200
✔ PECOS✔ Accepts MedicareSame address
Scott Plaehn, DO
Gastroenterology
NPI 1750339073
1650 RAMBLEWOOD DR
East Lansing, MI 48823
(517) 332-1200
✔ PECOS✔ Accepts MedicareSame address
Albert Ross, MD
Gastroenterology
NPI 1568411510
1650 RAMBLEWOOD DR STE 100
East Lansing, MI 48823
(517) 332-1200
✔ PECOS✔ Accepts MedicareSame address
Siaka Yusuf, MD
Gastroenterology
NPI 1619925146
1650 RAMBLEWOOD DR STE 100
East Lansing, MI 48823
(517) 332-1200
✔ PECOS✔ Accepts MedicareSame address
Margaret Blayney, MD
Gastroenterology
NPI 1629413018
1650 RAMBLEWOOD DR STE 100
East Lansing, MI 48823
(517) 332-1200
✔ PECOS✔ Accepts MedicareSame address
Matthew Dimagno, MD
Gastroenterology
NPI 1720160252
1650 RAMBLEWOOD DR STE 100
East Lansing, MI 48823
(517) 332-1200
✔ PECOS✔ Accepts MedicareSame address
Iftiker Ahmad, MD
Gastroenterology
NPI 1184673402
1650 RAMBLEWOOD DR
East Lansing, MI 48823
(517) 332-1200
✔ PECOS✔ Accepts Medicare0.2 mi
John Walling, DO
Gastroenterology
NPI 1073579512
1650 RAMBLEWOOD DR
East Lansing, MI 48823
(517) 332-1200
✔ PECOS✔ Accepts Medicare0.2 mi
Cristin Opreanu, MD
General Surgery
NPI 1235375585
1627 LAKE LANSING RD STE 100
Lansing, MI 48912
(517) 372-0500
✔ PECOS✔ Accepts Medicare1.0 mi
Daniel Coffey, M.D.
Colorectal Surgery (Proctology)
NPI 1710961305
1627 LAKE LANSING RD STE 100
Lansing, MI 48912
(517) 372-0500
✔ PECOS✔ Accepts Medicare1.0 mi
Lucas Julien, M.D.
Colorectal Surgery (Proctology)
NPI 1821213315
1627 LAKE LANSING RD STE 100
Lansing, MI 48912
(517) 372-0500
✔ PECOS✔ Accepts Medicare1.0 mi
Amir Abadir, M.D.
Gastroenterology
NPI 1184050098
3937 PATIENT CARE DR. SUITE 106
Lansing, MI 48911
(517) 485-2317
✔ PECOS✔ Accepts Medicare5.7 mi
Mehdi Baluch, MD
Gastroenterology
NPI 1104831536
900 COOPER AVE STE 4300
Saginaw, MI 48602
(989) 583-7460
✔ PECOS✔ Accepts Medicare54 mi
Tusar Desai, MD
Gastroenterology
NPI 1740271527
4705 TOWNE CENTRE RD STE 104
Saginaw, MI 48604
(989) 791-9133
✔ PECOS✔ Accepts Medicare57 mi
Neal Goldstein, M.D.
Pathology
NPI 1578523643
6455 MISSION COURT
West Bloomfield, MI 48324
(313) 486-9008
✔ PECOS✔ Accepts Medicare57 mi
Whitney Morris, FNP-BC
Nurse Practitioner
NPI 1316758774
1701 SOUTH BLVD E STE 300
Rochester Hills, MI 48307
(248) 884-9710
✔ PECOS✔ Accepts Medicare72 mi
Esther Tillman, CRNA
Certified Registered Nurse Anesthetist (CRNA)
NPI 1396347282
1701 SOUTH BLVD E STE 300
Rochester Hills, MI 48307
(248) 884-9710
✔ Accepts Medicare72 mi
See all 49 clinicians

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 Troy Gastroenterology, PC's NPI number?

The NPI number for Troy Gastroenterology, PC is 1699880591. It was assigned to this organization in the NPPES registry on August 20, 2006. The provider is doing business as Michigan Gastroenterology Institute.

Where is Troy Gastroenterology, PC located?

Troy Gastroenterology, PC is located at 1650 Ramblewood Dr Ste 100, East Lansing, MI 48823. The listed phone number is (517) 332-1200.

What is Troy Gastroenterology, PC's specialty?

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

Is Troy Gastroenterology, PC enrolled in Medicare?

Yes. Troy Gastroenterology, PC is registered in the Medicare PECOS enrollment system.

How many clinicians bill Medicare through Troy Gastroenterology, PC?

According to the CMS Revalidation Reassignment List (October 2026 release), 49 clinicians in 7 Medicare specialties reassign their Medicare billing to Troy Gastroenterology, PC. 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. The largest specialties are Gastroenterology (31), Nurse Practitioner (11) and Colorectal Surgery (Proctology) (2). Of these, 9 practice at this address and 15 within 10 miles. Reassignment records can lag staffing changes; confirm a current affiliation with the organization.

What insurance does Troy Gastroenterology, PC accept?

Health plans from Ambetter Health, Ambetter from Buckeye Health Plan, Ambetter from Meridian, Blue Care Network of Michigan and Blue Cross Blue Shield of Michigan Mutual Insurance Company list Troy Gastroenterology, PC 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 Troy Gastroenterology, PC was last updated on May 3, 2022. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 4 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.