MARGARET JANE BLAYNEY MD
NPI 1629413018
Internal Medicine - Gastroenterology in East Lansing, MI
About Margaret Jane Blayney Md NPPES
Official registry information on file with the National Plan and Provider Enumeration System.
MARGARET JANE BLAYNEY MD (NPI 1629413018) is an individual gastroenterology provider in East Lansing, Michigan, licensed in Michigan (4301500792) and active in the NPI registry since April 2013. She is enrolled in Medicare PECOS, is affiliated with University Of Michigan Health System, and maintains a secondary practice location in Ann Arbor.
NPPES Registry Identity
Specialties & Licenses
Secondary Practice Location 1
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
Margaret Jane Blayney 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 Reassignments
2Medicare enrollment records show Margaret Blayney reassigns Medicare billing to 2 organizations. Each organization bills Medicare for the services this provider delivers there; the nearest is listed first.
East Lansing, MI 48823
- Reassigned Medicare billing, Michigan enrollment
- 49 clinicians in this Medicare group
Lansing, MI 48912
- Reassigned Medicare billing, Michigan enrollment
- 2,377 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 10
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 2
Hospitals where this provider delivers care, identified from recent Medicare claims and place-of-service records.
University Of Michigan Health System
Acute Care Hospitals · Ann Arbor, MIMclaren Greater Lansing
Acute Care Hospitals · Lansing, MIPhysician Visit Costs CMS claims · ZIP area
Typical Medicare office-visit costs in the 48823 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 7
Providers registered at the same practice address, or within the immediate area, according to the NPPES registry.
EAST LANSING, MI 48823
EAST LANSING, MI 48823
EAST LANSING, MI 48823
EAST LANSING, MI 48823
EAST LANSING, MI 48823
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 Margaret Blayney's NPI number?
The NPI number for Margaret Blayney is 1629413018. It was assigned to this individual provider in the NPPES registry on April 30, 2013.
Where is Margaret Blayney located?
Margaret Blayney practices at 1650 Ramblewood Dr Ste 100, East Lansing, MI 48823. The listed phone number is (517) 332-1200.
What is Margaret Blayney's specialty?
The primary specialty registered for this NPI is Internal Medicine, specializing in Gastroenterology, with taxonomy code 207RG0100X.
Is Margaret Blayney enrolled in Medicare?
Yes. Margaret Blayney 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 Margaret Blayney's services?
According to the CMS Revalidation Reassignment List (October 2026 release), Margaret Blayney reassigns Medicare benefits to 2 organizations: Troy Gastroenterology, PC (East Lansing, MI) and Regents Of The University Of Michigan (Lansing, 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 Margaret Blayney's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.
What insurance does Margaret Blayney accept?
Health plans from Blue Care Network of Michigan, Blue Cross Blue Shield of Michigan Mutual Insurance Company and Priority Health list Margaret Blayney 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 Margaret Blayney affiliated with any hospitals?
According to CMS data, Margaret Blayney is affiliated with University Of Michigan Health System and Mclaren Greater Lansing.
When was this NPI record last updated?
The NPPES record for Margaret Blayney was last updated on March 3, 2026. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 7 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.
# Margaret Jane Blayney, MD · NPI 1629413018
Gastroenterology physician in East Lansing, Michigan. Individual provider, active in the CMS NPPES registry since April 30, 2013.
## Identity
- **NPI:** 1629413018 (Entity type: Individual)
- **Enumerated:** April 30, 2013
- **Primary specialty:** Internal Medicine - Gastroenterology · taxonomy 207RG0100X
- **State license:** 4301500792 (Michigan)
- **Sole proprietor:** No
## Practice location
- **Address:** 1650 RAMBLEWOOD DR STE 100, East Lansing, MI 48823-7396
- **Phone:** (517) 332-1200 · **Fax:** (517) 351-7122
## 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:** 2 organizations under Medicare reassignment (form CMS-855R): Troy Gastroenterology, PC (NPI 1699880591, East Lansing, MI); Regents Of The University Of Michigan (NPI 1174809826, Lansing, MI) · CMS Revalidation Reassignment List, October 2026 release
- **Medical school:** University Of Michigan Medical School, class of 2013
## Record status
- **NPPES last updated:** March 3, 2026
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Source: [NPI Profile](https://npiprofile.com/npi/1629413018) · Data from the CMS NPPES public registry.