ROBERT JAMES GREGG D.C.
NPI 1083774947
Chiropractor in Garden City, MI
About Robert James Gregg D.c. NPPES
Official registry information on file with the National Plan and Provider Enumeration System.
ROBERT JAMES GREGG D.C. (NPI 1083774947) is an individual chiropractor in Garden City, Michigan, licensed in Michigan (2301002537) and active in the NPI registry since December 2006. He is a graduate of Logan College Of Chiropractic (1971).
NPPES Registry Identity
Specialties & Licenses
Other Identifiers 3
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
Robert James Gregg D.c. 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
2Medicare enrollment records show Robert Gregg reassigns Medicare billing to 2 organizations. Each organization bills Medicare for the services this provider delivers there; the nearest is listed first.
Garden City, MI 48135
- Reassigned Medicare billing, Michigan enrollment
- Medicare enrollment name: Gregg Chiropractic Life Center PC
- 5 clinicians in this Medicare group
Troy, MI 48083
- Reassigned Medicare billing, Michigan enrollment
- 2 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.
Other Providers at the Same Location NPPES 6
Providers registered at the same practice address, or within the immediate area, according to the NPPES registry.
GARDEN CITY, MI 48135
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 Robert Gregg's NPI number?
The NPI number for Robert Gregg is 1083774947. It was assigned to this individual provider in the NPPES registry on December 11, 2006.
Where is Robert Gregg located?
Robert Gregg practices at 1647 Inkster Rd, Garden City, MI 48135. The listed phone number is (734) 525-8422.
What is Robert Gregg's specialty?
The primary specialty registered for this NPI is Chiropractor with taxonomy code 111N00000X.
Is Robert Gregg enrolled in Medicare?
Yes. Robert Gregg 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 Robert Gregg's services?
According to the CMS Revalidation Reassignment List (October 2026 release), Robert Gregg reassigns Medicare benefits to 2 organizations: Gregg Chiropractic Life Center P.C. (Garden City, MI) and Gregg Chiropractic Troy, P.C. (Troy, 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 Robert Gregg's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.
What insurance does Robert Gregg accept?
Health plans from Ambetter Health, Ambetter from Buckeye Health Plan, Ambetter from Meridian, Blue Care Network of Michigan and Blue Cross Blue Shield of Michigan Mutual Insurance Company and 2 other insurers list Robert Gregg 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 Robert Gregg was last updated on July 8, 2007. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 19 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.
# Robert James Gregg, D.C. · NPI 1083774947
Chiropractor provider in Garden City, Michigan. Individual provider, active in the CMS NPPES registry since December 11, 2006.
## Identity
- **NPI:** 1083774947 (Entity type: Individual)
- **Enumerated:** December 11, 2006
- **Primary specialty:** Chiropractor · taxonomy 111N00000X
- **State license:** 2301002537 (Michigan)
- **Sole proprietor:** No
## Practice location
- **Address:** 1647 INKSTER RD, Garden City, MI 48135-3086
- **Phone:** (734) 525-8422 · **Fax:** (723) 525-5421
## Medicare
- **Medicare:** Enrolled (PECOS); accepts Medicare assignment
- **Bills Medicare through:** 2 organizations under Medicare reassignment (form CMS-855R): Gregg Chiropractic Life Center P.C. (NPI 1992865703, Garden City, MI); Gregg Chiropractic Troy, P.C. (NPI 1932703048, Troy, MI) · CMS Revalidation Reassignment List, October 2026 release
- **Medical school:** Logan College Of Chiropractic, class of 1971
## Record status
- **NPPES last updated:** July 8, 2007
- **Other identifiers:** Medicare UPIN U23026 (MI); Medicaid 1008872 (MI); Medicare ID-Type Unspecified 0Q26406 (MI)
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Source: [NPI Profile](https://npiprofile.com/npi/1083774947) · Data from the CMS NPPES public registry.