DR. JOHN AUSTIN CARR D.O.
NPI 1861886665
Obstetrics & Gynecology in Grand Blanc, MI
About Dr. John Austin Carr D.o. NPPES
Official registry information on file with the National Plan and Provider Enumeration System.
DR. JOHN AUSTIN CARR D.O. (NPI 1861886665) is an individual obstetrics & gynecology provider in Grand Blanc, Michigan, licensed in Michigan (5101024656) and active in the NPI registry since March 2015. He is enrolled in Medicare PECOS and is a graduate of At Still University Of Health Sciences, College Of Osteo Med, Kirksville (2015).
NPPES Registry Identity
Specialties & Licenses
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
Dr. John Austin Carr 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
4Medicare enrollment records show John Carr reassigns Medicare billing to 4 organizations. Each organization bills Medicare for the services this provider delivers there; the nearest is listed first.
Grand Blanc, MI 48439
- Reassigned Medicare billing, Michigan enrollment
- Medicare enrollment name: Henry Ford Health Genesys Hospital
- 103 clinicians in this Medicare group
Grand Blanc, MI 48439
- Reassigned Medicare billing, Michigan enrollment
- 59 clinicians in this Medicare group
Flushing, MI 48433
- Reassigned Medicare billing, Michigan enrollment
- 328 clinicians in this Medicare group
Mount Vernon, OH 43050
- Reassigned Medicare billing, Ohio enrollment
- 191 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
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.
Physician Visit Costs CMS claims · ZIP area
Typical Medicare office-visit costs in the 48439 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 5
Providers registered at the same practice address, or within the immediate area, according to the NPPES registry.
GRAND BLANC, MI 48439
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 John Carr's NPI number?
The NPI number for John Carr is 1861886665. It was assigned to this individual provider in the NPPES registry on March 19, 2015.
Where is John Carr located?
John Carr practices at 4620 Genesys Pkwy, Grand Blanc, MI 48439. The listed phone number is (810) 606-7190.
What is John Carr's specialty?
The primary specialty registered for this NPI is Obstetrics & Gynecology with taxonomy code 207V00000X.
Is John Carr enrolled in Medicare?
Yes. John Carr 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 John Carr's services?
According to the CMS Revalidation Reassignment List (October 2026 release), John Carr reassigns Medicare benefits to 4 organizations: Ascension Genesys Hospital (Grand Blanc, MI), Genesys Practice Partners Inc (Grand Blanc, MI), Memorial Hospital (Flushing, MI) and Knox Community Hospital (Mount Vernon, OH). 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 John Carr's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.
What insurance does John Carr accept?
Health plans from Blue Care Network of Michigan, Blue Cross Blue Shield of Michigan Mutual Insurance Company, CareSource and Priority Health list John Carr 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 John Carr was last updated on May 14, 2021. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 5 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. John Austin Carr, D.O. · NPI 1861886665
Obstetrics & Gynecology physician in Grand Blanc, Michigan. Individual provider, active in the CMS NPPES registry since March 19, 2015.
## Identity
- **NPI:** 1861886665 (Entity type: Individual)
- **Enumerated:** March 19, 2015
- **Primary specialty:** Obstetrics & Gynecology · taxonomy 207V00000X
- **State license:** 5101024656 (Michigan)
- **Sole proprietor:** No
## Practice location
- **Address:** 4620 GENESYS PKWY, Grand Blanc, MI 48439-8067
- **Phone:** (810) 606-7190
## 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:** 4 organizations under Medicare reassignment (form CMS-855R): Ascension Genesys Hospital (NPI 1104236249, Grand Blanc, MI); Genesys Practice Partners Inc (NPI 1194774752, Grand Blanc, MI); Memorial Hospital (NPI 1144428202, Flushing, MI); Knox Community Hospital (NPI 1801045406, Mount Vernon, OH) · CMS Revalidation Reassignment List, October 2026 release
- **Medical school:** At Still University Of Health Sciences, College Of Osteo Med, Kirksville, class of 2015
## Record status
- **NPPES last updated:** May 14, 2021
---
Source: [NPI Profile](https://npiprofile.com/npi/1861886665) · Data from the CMS NPPES public registry.