COREWELL HEALTH MEDICAL GROUP SOUTH
NPI 1538397120
Internal Medicine in Saint Joseph, MI
About Corewell Health Medical Group South NPPES
Official registry information on file with the National Plan and Provider Enumeration System.
COREWELL HEALTH MEDICAL GROUP SOUTH (NPI 1538397120) is a healthcare organization registered as an internal medicine in Saint Joseph, Michigan and active in the NPI registry since June 2009. The organization lists Warren White, V.p. Lakeland Physician Practices, as its authorized official.
NPPES Registry Identity
Specialties & Licenses
Other Names 1
Other Identifiers 6
Group Practice 1
Accepted Insurance
Medicare Participation & PECOS CMS
Medicare enrollment, revalidation and the clinicians who bill Medicare through this organization, from CMS.
Medicare Enrollment Status
Enrolled in Medicare (PECOS)
Corewell Health Medical Group South is registered in the CMS Provider Enrollment, Chain and Ownership System (PECOS).
Medicare Revalidation Due Date
Revalidation due by March 31, 2027
Medicare-enrolled providers and suppliers confirm their enrollment information with CMS on a set cycle, every 5 years for most and every 3 years for medical equipment suppliers. CMS sets the due date for each enrollment.
Clinicians Billing Medicare Through This Organization
724Medicare enrollment records show 724 clinicians reassign Medicare billing to Corewell Health Medical Group South, which bills Medicare for the services they deliver. Of these, 92 practice at this address and 219 within 10 miles. Listed here are the 20 practicing nearest to this location.
Clinicians by Medicare Specialty 44
Nearest to this location (20)
See all 724Source: 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 Lakeland Medical Practices's NPI number?
The NPI number for Lakeland Medical Practices is 1538397120. It was assigned to this organization in the NPPES registry on June 23, 2009. The provider is doing business as Corewell Health Medical Group South.
Where is Lakeland Medical Practices located?
Lakeland Medical Practices is located at 1234 Napier Ave, Saint Joseph, MI 49085. The listed phone number is (269) 428-5007.
What is Lakeland Medical Practices's specialty?
The primary specialty registered for this NPI is Internal Medicine with taxonomy code 207R00000X.
Is Lakeland Medical Practices enrolled in Medicare?
Yes. Lakeland Medical Practices is registered in the Medicare PECOS enrollment system.
When is Lakeland Medical Practices's Medicare revalidation due?
According to the CMS Revalidation Due Date List (October 2026 release), the Medicare Non-DME Part B enrollment for this organization (Michigan, Clinic/Group Practice) is due for revalidation by March 31, 2027. Medicare providers and suppliers revalidate their enrollment every 5 years, and medical equipment suppliers every 3 years. Confirm current requirements with your Medicare Administrative Contractor.
How many clinicians bill Medicare through Lakeland Medical Practices?
According to the CMS Revalidation Reassignment List (October 2026 release), 724 clinicians in 44 Medicare specialties reassign their Medicare billing to Lakeland Medical Practices. 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 Neurology (184), Nurse Practitioner (116) and Internal Medicine (83). Of these, 92 practice at this address and 219 within 10 miles. Reassignment records can lag staffing changes; confirm a current affiliation with the organization.
What insurance does Lakeland Medical Practices accept?
Health plans from Ambetter Health, Ambetter from Buckeye Health Plan, Ambetter from Meridian and Blue Cross Blue Shield of Michigan Mutual Insurance Company list Lakeland Medical Practices 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 Lakeland Medical Practices was last updated on December 17, 2023. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 2 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.
# Corewell Health Medical Group South · NPI 1538397120
Internal Medicine organization in Saint Joseph, Michigan. Organization record, active in the CMS NPPES registry since June 23, 2009.
## Identity
- **NPI:** 1538397120 (Entity type: Organization)
- **Enumerated:** June 23, 2009
- **Primary specialty:** Internal Medicine · taxonomy 207R00000X
- **Legal business name:** Lakeland Medical Practices
- **Organization subpart:** No
- **Authorized official:** Warren White, V.P. LAKELAND PHYSICIAN PRACTICES
## Practice location
- **Address:** 1234 NAPIER AVE, Saint Joseph, MI 49085-2112
- **Phone:** (269) 428-5007 · **Fax:** (269) 428-2789
## Medicare
- **Medicare:** Enrolled in Medicare (PECOS)
- **Medicare revalidation due:** March 31, 2027 (Non-DME Part B, Michigan, Clinic/Group Practice) · CMS Revalidation Due Date List, October 2026 release
- **Clinicians billing through this organization:** 724 clinicians in 44 Medicare specialties reassign Medicare billing to this organization (form CMS-855R); largest: Neurology (184), Nurse Practitioner (116), Internal Medicine (83); 92 practice at this address and 219 within 10 miles; [full list](https://npiprofile.com/npi/1538397120/clinicians) · CMS Revalidation Reassignment List, October 2026 release
## Record status
- **NPPES last updated:** December 17, 2023
- **Other identifiers:** Other OA10085 (MI); Other OA10080 (MI); Medicaid 1538397120 (MI); and 3 more
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Source: [NPI Profile](https://npiprofile.com/npi/1538397120) · Data from the CMS NPPES public registry.