DR. BRETT JUSTIN GERSTNER D.O.
NPI 1013356021
Emergency Medicine in Lansing, MI
About Dr. Brett Justin Gerstner D.o. NPPES
Official registry information on file with the National Plan and Provider Enumeration System.
DR. BRETT JUSTIN GERSTNER D.O. (NPI 1013356021) is an individual emergency medicine provider in Lansing, Michigan, licensed in Michigan (5101020313) and active in the NPI registry since June 2013. He is enrolled in Medicare PECOS, is affiliated with Edward W Sparrow Hospital, and is a graduate of Michigan State University College Of Osteopathic Medicine (2013).
NPPES Registry Identity
Specialties & Licenses
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
Dr. Brett Justin Gerstner D.o. 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 Reassignments
3Medicare enrollment records show Brett Gerstner reassigns Medicare billing to 3 organizations. Each organization bills Medicare for the services this provider delivers there; the nearest is listed first.
Lansing, MI 48912
- Reassigned Medicare billing, Michigan enrollment
- 112 clinicians in this Medicare group
Lansing, MI 48910
- Reassigned Medicare billing, Michigan enrollment
- 295 clinicians in this Medicare group
Flushing, MI 48433
- Reassigned Medicare billing, Michigan enrollment
- 416 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.
Areas of Expertise CMS Part B claims 2
Services this provider delivered to Medicare fee-for-service patients, from the CMS Medicare utilization data. Higher counts generally reflect more experience with a service; care delivered outside Medicare is not included.
Hospital Affiliations CMS Care Compare
Hospitals where this provider delivers care, identified from recent Medicare claims and place-of-service records.
Edward W Sparrow Hospital
Acute Care Hospitals · Lansing, MIPhysician Visit Costs CMS claims · ZIP area
Typical Medicare office-visit costs in the 48912 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 48912
LANSING, MI 48912
LANSING, MI 48912
LANSING, MI 48912
LANSING, MI 48912
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 Brett Gerstner's NPI number?
The NPI number for Brett Gerstner is 1013356021. It was assigned to this individual provider in the NPPES registry on June 24, 2013.
Where is Brett Gerstner located?
Brett Gerstner practices at 1215 E Michigan Ave, Lansing, MI 48912. The listed phone number is (517) 364-1000.
What is Brett Gerstner's specialty?
The primary specialty registered for this NPI is Emergency Medicine with taxonomy code 207P00000X.
Is Brett Gerstner enrolled in Medicare?
Yes. Brett Gerstner 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 organizations bill Medicare for Brett Gerstner's services?
According to the CMS Revalidation Reassignment List (October 2026 release), Brett Gerstner reassigns Medicare benefits to 3 organizations: Vituity - Michigan Em PC (Lansing, MI), Degara App, PLLC (Lansing, MI) and Mclaren Medical Group (Flushing, MI). Each 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 Brett Gerstner's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.
Is Brett Gerstner affiliated with any hospitals?
According to CMS data, Brett Gerstner is affiliated with Edward W Sparrow Hospital.
When was this NPI record last updated?
The NPPES record for Brett Gerstner was last updated on June 24, 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.
# Dr. Brett Justin Gerstner, D.O. · NPI 1013356021
Emergency Medicine physician in Lansing, Michigan. Individual provider, active in the CMS NPPES registry since June 24, 2013.
## Identity
- **NPI:** 1013356021 (Entity type: Individual)
- **Enumerated:** June 24, 2013
- **Primary specialty:** Emergency Medicine · taxonomy 207P00000X
- **State license:** 5101020313 (Michigan)
- **Sole proprietor:** No
## Practice location
- **Address:** 1215 E MICHIGAN AVE, Lansing, MI 48912-1811
- **Phone:** (517) 364-1000
## 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:** 3 organizations under Medicare reassignment (form CMS-855R): Vituity - Michigan Em PC (NPI 1144892332, Lansing, MI); Degara App, PLLC (NPI 1265976971, Lansing, MI); Mclaren Medical Group (NPI 1053458091, Flushing, MI) · CMS Revalidation Reassignment List, October 2026 release
- **Medical school:** Michigan State University College Of Osteopathic Medicine, class of 2013
## Record status
- **NPPES last updated:** June 24, 2013
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Source: [NPI Profile](https://npiprofile.com/npi/1013356021) · Data from the CMS NPPES public registry.