MICHIANA ADULT MEDICAL SPECIALISTS
NPI 1154663763
Internal Medicine - Geriatric Medicine in South Bend, IN
About Michiana Adult Medical Specialists NPPES
Official registry information on file with the National Plan and Provider Enumeration System.
MICHIANA ADULT MEDICAL SPECIALISTS (NPI 1154663763) is a healthcare organization registered as a geriatric medicine in South Bend, Indiana and active in the NPI registry since March 2013. The organization holds a CLIA Certificate of Compliance certificate valid through March 23, 2028 and lists Alexander C. Gatzimos, Manager, as its authorized official.
NPPES Registry Identity
Specialties & Licenses
Other Names 1
Other Identifiers 2
Group Practice 1
Accepted 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)
Michiana Adult Medical Specialists is registered in the CMS Provider Enrollment, Chain and Ownership System (PECOS).
Clinicians Billing Medicare Through This Organization
2Medicare enrollment records show 2 clinicians reassign Medicare billing to Michiana Adult Medical Specialists, which bills Medicare for the services they deliver. Of these, 2 practice within 10 miles. They are listed nearest first.
Clinicians, nearest first (2)
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
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 Compliance 15D2058128
Michiana Adult Medical Specialists · Mishawaka, INFrequently 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 Alexander C. Gatzimos MD Jd's NPI number?
The NPI number for Alexander C. Gatzimos MD Jd is 1154663763. It was assigned to this organization in the NPPES registry on March 21, 2013. The provider is doing business as Michiana Adult Medical Specialists.
Where is Alexander C. Gatzimos MD Jd located?
Alexander C. Gatzimos MD Jd is located at 2050 E Ireland Rd, South Bend, IN 46614. The listed phone number is (574) 222-2359.
What is Alexander C. Gatzimos MD Jd's specialty?
The primary specialty registered for this NPI is Internal Medicine, specializing in Geriatric Medicine, with taxonomy code 207RG0300X.
Is Alexander C. Gatzimos MD Jd enrolled in Medicare?
Yes. Alexander C. Gatzimos MD Jd is registered in the Medicare PECOS enrollment system.
How many clinicians bill Medicare through Alexander C. Gatzimos MD Jd?
According to the CMS Revalidation Reassignment List (October 2026 release), 2 clinicians reassign their Medicare billing to Alexander C. Gatzimos MD Jd, in Internal Medicine and Nurse Practitioner. 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. Of these, 2 practice within 10 miles. Reassignment records can lag staffing changes; confirm a current affiliation with the organization.
Does Alexander C. Gatzimos MD Jd hold a CLIA laboratory certificate?
Yes. A Certificate of Compliance (number 15D2058128) is associated with this NPI, valid through March 23, 2028. CLIA certificates authorize laboratory testing under the federal Clinical Laboratory Improvement Amendments program.
What insurance does Alexander C. Gatzimos MD Jd accept?
Health plans from Ambetter Health, Ambetter from Buckeye Health Plan, Ambetter from Meridian and Anthem Blue Cross and Blue Shield list Alexander C. Gatzimos MD Jd 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 Alexander C. Gatzimos MD Jd was last updated on October 1, 2013. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 13 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.
# Michiana Adult Medical Specialists · NPI 1154663763
Geriatric Medicine organization in South Bend, Indiana. Organization record, active in the CMS NPPES registry since March 21, 2013.
## Identity
- **NPI:** 1154663763 (Entity type: Organization)
- **Enumerated:** March 21, 2013
- **Primary specialty:** Internal Medicine - Geriatric Medicine · taxonomy 207RG0300X
- **Legal business name:** Alexander C. Gatzimos Md Jd
- **Organization subpart:** No
- **Authorized official:** Alexander Gatzimos, MANAGER
## Practice location
- **Address:** 2050 E IRELAND RD, South Bend, IN 46614-2909
- **Phone:** (574) 222-2359 · **Fax:** (574) 222-2365
## Medicare
- **Medicare:** Enrolled in Medicare (PECOS)
- **Clinicians billing through this organization:** 2 clinicians in 2 Medicare specialties reassign Medicare billing to this organization (form CMS-855R); largest: Internal Medicine (1), Nurse Practitioner (1); 2 practice within 10 miles · CMS Revalidation Reassignment List, October 2026 release
## Record status
- **NPPES last updated:** October 1, 2013
- **Other identifiers:** Medicaid D95574 (IN); Medicare UPIN DP5574 (IN)
- **CLIA laboratory certificates:** 1 on file
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Source: [NPI Profile](https://npiprofile.com/npi/1154663763) · Data from the CMS NPPES public registry.