MICHAEL LEROY AHRENS MD
NPI 1669051215
Internal Medicine in Lansing, MI
About Michael Leroy Ahrens Md NPPES
Official registry information on file with the National Plan and Provider Enumeration System.
MICHAEL LEROY AHRENS MD (NPI 1669051215) is an individual internal medicine provider in Lansing, Michigan, licensed in Michigan (4301515242) and active in the NPI registry since April 2021. He is enrolled in Medicare PECOS, is affiliated with Mclaren Greater Lansing, and maintains 2 additional practice locations.
NPPES Registry Identity
Specialties & Licenses 2
Secondary Practice Locations 2
Accepted Insurance
Medicare Participation & PECOS CMS
Medicare enrollment, assignment, billing reassignment, and ordering and referring status from CMS.
Medicare Enrollment Status
Enrolled in Medicare and accepts Medicare assignment
Michael Leroy Ahrens Md is registered in PECOS and agrees to accept the Medicare-approved amount as full payment. Medicare patients are not billed beyond the standard deductible and coinsurance.
Medicare Billing Reassignment
Medicare enrollment records show Michael Ahrens reassigns Medicare billing to 1 organization. The organization bills Medicare for the services this provider delivers there.
Lansing, MI 48911
- Reassigned Medicare billing, Michigan enrollment
- 108 clinicians in this Medicare group
Source: CMS Revalidation Reassignment List, October 2026 release. Reassignment records can lag staffing changes; confirm a current affiliation with the organization.
Hospital Affiliations CMS Care Compare
Hospitals where this provider delivers care, identified from recent Medicare claims and place-of-service records.
Mclaren Greater Lansing
Acute Care Hospitals · Lansing, MIPhysician Visit Costs CMS claims · ZIP area
Typical Medicare office-visit costs in the 48910 ZIP code area, from fee-for-service claims. These are area statistics, not this provider’s prices; actual charges vary by service and coverage.
Other Providers at the Same Location NPPES 20
Providers registered at the same practice address, or within the immediate area, according to the NPPES registry.
LANSING, MI 48910
LANSING, MI 48910
LANSING, MI 48910
LANSING, MI 48910
LANSING, MI 48910
LANSING, MI 48910
LANSING, MI 48910
LANSING, MI 48910
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 Michael Ahrens's NPI number?
The NPI number for Michael Ahrens is 1669051215. It was assigned to this individual provider in the NPPES registry on April 2, 2021.
Where is Michael Ahrens located?
Michael Ahrens practices at 2900 Collins Rd, Lansing, MI 48910. The listed phone number is (517) 975-6000.
What is Michael Ahrens's specialty?
The primary specialty registered for this NPI is Internal Medicine with taxonomy code 207R00000X.
Is Michael Ahrens enrolled in Medicare?
Yes. Michael Ahrens is registered in the Medicare PECOS system and accepts Medicare assignment, which means accepting the Medicare-approved amount as payment in full for covered services.
Which organization bills Medicare for Michael Ahrens's services?
According to the CMS Revalidation Reassignment List (October 2026 release), Michael Ahrens reassigns Medicare benefits to Capital Internal Medicine Associates P.C. (Lansing, MI). The 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 Michael Ahrens's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.
What insurance does Michael Ahrens accept?
Health plans from Priority Health list Michael Ahrens 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.
Is Michael Ahrens affiliated with any hospitals?
According to CMS data, Michael Ahrens is affiliated with Mclaren Greater Lansing.
When was this NPI record last updated?
The NPPES record for Michael Ahrens was last updated on January 14, 2026. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 9 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.
# Michael Leroy Ahrens, MD · NPI 1669051215
Internal Medicine physician in Lansing, Michigan. Individual provider, active in the CMS NPPES registry since April 2, 2021.
## Identity
- **NPI:** 1669051215 (Entity type: Individual)
- **Enumerated:** April 2, 2021
- **Primary specialty:** Internal Medicine · taxonomy 207R00000X
- **State license:** 4301515242 (Michigan)
- **Sole proprietor:** No
## Practice location
- **Address:** 2900 COLLINS RD, Lansing, MI 48910-8394
- **Phone:** (517) 975-6000
## Medicare
- **Medicare:** Enrolled (PECOS); accepts Medicare assignment
- **Ordering & referring:** eligible for Part B labs & imaging, durable medical equipment, home health, power mobility devices
- **Bills Medicare through:** Capital Internal Medicine Associates P.C. (NPI 1780629832, Lansing, MI), under Medicare reassignment (form CMS-855R) · CMS Revalidation Reassignment List, October 2026 release
- **Medical school:** Other, class of 2021
## Record status
- **NPPES last updated:** January 14, 2026
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Source: [NPI Profile](https://npiprofile.com/npi/1669051215) · Data from the CMS NPPES public registry.