THEORIA MEDICAL
NPI 1164186946
Internal Medicine in Brighton, MI
About Theoria Medical NPPES
Official registry information on file with the National Plan and Provider Enumeration System.
THEORIA MEDICAL (NPI 1164186946), doing business as Theoria Primary Care, is a healthcare organization registered as an internal medicine in Brighton, Michigan and active in the NPI registry since October 2021. The organization lists Justin Di Rezze, Ceo, as its authorized official.
NPPES Registry Identity
Specialties & Licenses 4
Other Names 1
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)
Theoria Medical is registered in the CMS Provider Enrollment, Chain and Ownership System (PECOS).
Clinicians Billing Medicare Through This Organization
380Medicare enrollment records show 380 clinicians reassign Medicare billing to Theoria Medical, which bills Medicare for the services they deliver. Of these, 1 practice at this address and 4 within 10 miles. Listed here are the 20 practicing nearest to this location.
Clinicians by Medicare Specialty 13
Nearest to this location (20)
See all 380Ann Arbor, MI 48109
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 Theoria Medical's NPI number?
The NPI number for Theoria Medical is 1164186946. It was assigned to this organization in the NPPES registry on October 27, 2021. The provider is doing business as Theoria Primary Care.
Where is Theoria Medical located?
Theoria Medical is located at 6247 Grand River Rd Ste 400, Brighton, MI 48114. The listed phone number is (810) 215-7177.
What is Theoria Medical's specialty?
The primary specialty registered for this NPI is Internal Medicine with taxonomy code 207R00000X.
Is Theoria Medical enrolled in Medicare?
Yes. Theoria Medical is registered in the Medicare PECOS enrollment system.
How many clinicians bill Medicare through Theoria Medical?
According to the CMS Revalidation Reassignment List (October 2026 release), 380 clinicians in 13 Medicare specialties reassign their Medicare billing to Theoria Medical. 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 Nurse Practitioner (297), Internal Medicine (36) and Family Practice (27). Of these, 1 practice at this address and 4 within 10 miles. Reassignment records can lag staffing changes; confirm a current affiliation with the organization.
What insurance does Theoria Medical accept?
Health plans from Blue Care Network of Michigan and Cigna Healthcare list Theoria Medical 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 Theoria Medical was last updated on June 26, 2026. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 3 months 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.
# Theoria Medical · NPI 1164186946
Internal Medicine organization in Brighton, Michigan. Organization record, active in the CMS NPPES registry since October 27, 2021.
## Identity
- **NPI:** 1164186946 (Entity type: Organization)
- **Enumerated:** October 27, 2021
- **Primary specialty:** Internal Medicine · taxonomy 207R00000X
- **Also known as:** Theoria Primary Care (Doing Business As)
- **Organization subpart:** No
- **Authorized official:** Justin Di Rezze, CEO
## Practice location
- **Address:** 6247 GRAND RIVER RD STE 400, Brighton, MI 48114-5326
- **Phone:** (810) 215-7177 · **Fax:** (313) 217-3334
## Medicare
- **Medicare:** Enrolled in Medicare (PECOS)
- **Clinicians billing through this organization:** 380 clinicians in 13 Medicare specialties reassign Medicare billing to this organization (form CMS-855R); largest: Nurse Practitioner (297), Internal Medicine (36), Family Practice (27); 1 practice at this address and 4 within 10 miles; [full list](https://npiprofile.com/npi/1164186946/clinicians) · CMS Revalidation Reassignment List, October 2026 release
## Record status
- **NPPES last updated:** June 26, 2026
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Source: [NPI Profile](https://npiprofile.com/npi/1164186946) · Data from the CMS NPPES public registry.