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GASTROINTESTINAL SPECIALISTS PC
NPI 1780750125
Internal Medicine - Gastroenterology in Troy, MI

Active since November 28, 2006CLIA Certified · 2 labs
264 W MAPLE RD, #200, TROY, MI 48084(248) 273-9930(248) 273-9931 Get Directions Write a Review

NPPES record last updated: October 21, 2014. Verified against the NPPES registry weekly; last sync: October 18, 2026.

About Gastrointestinal Specialists Pc NPPES

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

GASTROINTESTINAL SPECIALISTS PC (NPI 1780750125) is a healthcare organization registered as a gastroenterology in Troy, Michigan and active in the NPI registry since November 2006. The organization holds 2 active CLIA laboratory certificates and lists Thomas J Alexander, President, as its authorized official.

NPPES Registry Identity

NPI1780750125
Entity TypeOrganization
Primary Taxonomy207RG0100X
Legal Business NameGASTROINTESTINAL SPECIALISTS PC
Location Address264 W MAPLE RD, #200Troy, MI 48084
Mailing Address264 W Maple Rd, #200Troy, MI 48084 · (248) 273-9930 · Fax (248) 273-9931
Phone(248) 273-9930
Fax(248) 273-9931
Organization SubpartNo
Authorized OfficialThomas J AlexanderPresident · (248) 273-9930
Enumeration DateNovember 28, 2006
Last NPPES UpdateOctober 21, 2014
✔ NPI 1780750125 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.
264 W MAPLE RD, Troy, MI 48084
Open in Google Maps ↗

Group Practice 1

Group TaxonomyThis provider is a business group of one or more individual practitioners, who practice with different areas of specialization.193200000X MULTI-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)

Gastrointestinal Specialists Pc is registered in the CMS Provider Enrollment, Chain and Ownership System (PECOS).

Clinicians Billing Medicare Through This Organization

17

Medicare enrollment records show 17 clinicians reassign Medicare billing to Gastrointestinal Specialists PC, which bills Medicare for the services they deliver. Of these, 11 practice at this address and 15 within 10 miles. They are listed nearest first.

Clinicians by Medicare Specialty 4

Gastroenterology11
Nurse Practitioner4
Internal Medicine1
Pathology1

Clinicians, nearest first (17)

Andrew Aneese, M.D.
Gastroenterology
NPI 1366821639
264 W MAPLE RD STE 200
Troy, MI 48084
(248) 273-9930
✔ PECOS✔ Accepts MedicareSame address
Kailey Arbaugh, AGNP-C
Nurse Practitioner
NPI 1619520327
264 W MAPLE RD STE 200
Troy, MI 48084
(248) 273-9930
✔ PECOS✔ Accepts MedicareSame address
Jared Bortman, MD
Gastroenterology
NPI 1023182037
264 W MAPLE RD SUITE 200
Troy, MI 48084
(248) 273-9930
✔ PECOS✔ Accepts MedicareSame address
Mackenzie Difiore, NP
Nurse Practitioner
NPI 1285202416
264 W MAPLE RD STE 200
Troy, MI 48084
(248) 273-9930
✔ PECOS✔ Accepts MedicareSame address
Gehad Ghaith, M.D.
Gastroenterology
NPI 1134119191
264 W MAPLE RD #200
Troy, MI 48084
(248) 273-9930
✔ PECOS✔ Accepts MedicareSame address
Maryconi Jacob, MD
Internal Medicine
NPI 1548558588
264 W MAPLE RD STE 200
Troy, MI 48084
(248) 273-9930
✔ PECOS✔ Accepts MedicareSame address
Dariusz Lazarczyk, MD
Gastroenterology
NPI 1083603500
264 W MAPLE RD #200
Troy, MI 48084
(248) 273-9930
✔ PECOS✔ Accepts MedicareSame address
Alyssa Lewandowski, FNP-C
Nurse Practitioner
NPI 1558124289
264 W MAPLE RD STE 200
Troy, MI 48084
(248) 273-9930
✔ PECOS✔ Accepts MedicareSame address
Atulkumar Patel, MD
Gastroenterology
NPI 1770572356
264 W MAPLE RD #200
Troy, MI 48084
(248) 273-9930
✔ PECOSSame address
Michael Cannon, MD
Gastroenterology
NPI 1184613879
264 W MAPLE RD #200
Troy, MI 48084
(248) 273-9930
✔ PECOSSame address
Michael Duffy, MD
Gastroenterology
NPI 1982693677
264 W MAPLE RD #200
Troy, MI 48084
(248) 273-9930
✔ PECOS✔ Accepts MedicareSame address
Osama Alassi, M.D.
Pathology
NPI 1033127741
3601 W 13 MILE RD
Royal Oak, MI 48073
(248) 898-9060
✔ PECOS✔ Accepts Medicare3.2 mi
Fadi Odish, MD
Gastroenterology
NPI 1659801983
3601 W 13 MILE RD
Royal Oak, MI 48073
(248) 551-3000
✔ PECOS✔ Accepts Medicare3.2 mi
Brian Markle, M.D.
Gastroenterology
NPI 1386848752
44555 WOODWARD AVE SUITE 304
Pontiac, MI 48341
(248) 858-3878
✔ PECOS✔ Accepts Medicare7.8 mi
Scott Mcgillivray, DNP, FNP-BC
Nurse Practitioner
NPI 1720786130
8569 GEORGE
Center Line, MI 48015
(586) 246-5041
✔ PECOS8.4 mi
Ketan Rana, MD
Gastroenterology
NPI 1467442616
28963 LITTLE MACK AVE GI MEDICINE ASSOCIATES PC SUITE 101
St Clair Shores, MI 48081
(586) 447-0700
✔ PECOS✔ Accepts Medicare13 mi
Priya Nethala
Gastroenterology
NPI 1417417866
625 19TH ST S
Birmingham, AL 35233
(205) 934-9666
✔ PECOS✔ Accepts Medicare655 mi

Source: CMS Revalidation Reassignment List, October 2026 release. Reassignment records can lag staffing changes; confirm a current affiliation with the organization.

CLIA Laboratory Certificates CMS CLIA 2

Laboratory certificates issued under the Clinical Laboratory Improvement Amendments (CLIA) program, which sets federal quality standards for human laboratory testing in the United States. There is no official CMS crosswalk between CLIA and NPI numbers; these certificates are associated with this NPI by matching facility names, locations and phone numbers in the CMS CLIA registry.

Certificate of Waiver 23D0679517

Gastrointestinal Specialists PC · Troy, MI
Active · expires Aug 31, 2028
CLIA Number23D0679517
Laboratory TypePhysician Office
Certificate Effective DateSeptember 1, 2026
Certificate Expiration DateAugust 31, 2028
Laboratory DirectorMichael Duffy
Laboratory Phone(248) 273-9930
Laboratory LocationGastrointestinal Specialists PC264 W Maple Road, Suite 200, Troy, MI 48084
CLIA data matches this NPI record on: Address Name Phone
This certificate is issued to a laboratory to perform only waived tests.

Certificate of Accreditation 23D2053092

Gastrointestinal Specialists, P C Laboratory · Troy, MI
Active · expires Feb 25, 2028
CLIA Number23D2053092
Laboratory TypePhysician Office
Certificate Effective DateFebruary 26, 2026
Certificate Expiration DateFebruary 25, 2028
Laboratory DirectorDr. Osama Alassi
Laboratory Phone(248) 273-9930
Laboratory LocationGastrointestinal Specialists, P C Laboratory264 W Maple Road Suite 200, Troy, MI 48084
CLIA data matches this NPI record on: Address Name Phone
This is a certificate that is issued to a laboratory on the basis of the laboratory's accreditation by an accreditation organization approved by CMS.

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 Gastrointestinal Specialists PC's NPI number?

The NPI number for Gastrointestinal Specialists PC is 1780750125. It was assigned to this organization in the NPPES registry on November 28, 2006.

Where is Gastrointestinal Specialists PC located?

Gastrointestinal Specialists PC is located at 264 W Maple Rd #200, Troy, MI 48084. The listed phone number is (248) 273-9930.

What is Gastrointestinal Specialists PC's specialty?

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

Is Gastrointestinal Specialists PC enrolled in Medicare?

Yes. Gastrointestinal Specialists PC is registered in the Medicare PECOS enrollment system.

How many clinicians bill Medicare through Gastrointestinal Specialists PC?

According to the CMS Revalidation Reassignment List (October 2026 release), 17 clinicians in 4 Medicare specialties reassign their Medicare billing to Gastrointestinal Specialists 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 (11), Nurse Practitioner (4) and Internal Medicine (1). Of these, 11 practice at this address and 15 within 10 miles. Reassignment records can lag staffing changes; confirm a current affiliation with the organization.

Does Gastrointestinal Specialists PC hold CLIA laboratory certificates?

Yes. 2 active CLIA laboratory certificates are associated with this NPI under the federal Clinical Laboratory Improvement Amendments program. The certificates are listed in the CLIA Laboratory Certificates section above.

What insurance does Gastrointestinal Specialists 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 Gastrointestinal Specialists 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 Gastrointestinal Specialists PC was last updated on October 21, 2014. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 12 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.