CONSTANCE LEAHY MD
NPI 1164477204
Obstetrics & Gynecology in Grand Rapids, MI
About Constance Leahy Md NPPES
Official registry information on file with the National Plan and Provider Enumeration System.
CONSTANCE LEAHY MD (NPI 1164477204) is an individual obstetrics & gynecology provider in Grand Rapids, Michigan, licensed in Michigan (4301061615) and active in the NPI registry since May 2006. She is enrolled in Medicare PECOS and is a graduate of Southern Illinois University School Of Medicine (1993).
NPPES Registry Identity
Specialties & Licenses
Other Identifiers 7
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
Constance Leahy 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 Constance Leahy reassigns Medicare billing to 2 organizations. Each organization bills Medicare for the services this provider delivers there; the nearest is listed first.
Grand Rapids, MI 49503
- Reassigned Medicare billing, Michigan enrollment
- 737 clinicians in this Medicare group
Muskegon, MI 49442
- Reassigned Medicare billing, Michigan enrollment
- 150 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.
Physician Visit Costs CMS claims · ZIP area
Typical Medicare office-visit costs in the 49503 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 4
Providers registered at the same practice address, or within the immediate area, according to the NPPES registry.
GRAND RAPIDS, MI 49503
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 Constance Leahy's NPI number?
The NPI number for Constance Leahy is 1164477204. It was assigned to this individual provider in the NPPES registry on May 24, 2006.
Where is Constance Leahy located?
Constance Leahy practices at 309 Jefferson Ave SE, Grand Rapids, MI 49503. The listed phone number is (616) 685-8750.
What is Constance Leahy's specialty?
The primary specialty registered for this NPI is Obstetrics & Gynecology with taxonomy code 207V00000X.
Is Constance Leahy enrolled in Medicare?
Yes. Constance Leahy 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 Constance Leahy's services?
According to the CMS Revalidation Reassignment List (October 2026 release), Constance Leahy reassigns Medicare benefits to 2 organizations: Advantage Health/Saint Mary's Medical Group (Grand Rapids, MI) and Mercy Health Partners - Physician Specialist (Muskegon, 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 Constance Leahy's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.
What insurance does Constance Leahy accept?
Health plans from Priority Health list Constance Leahy 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 Constance Leahy was last updated on June 29, 2009. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 17 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.
# Constance Leahy, MD · NPI 1164477204
Obstetrics & Gynecology physician in Grand Rapids, Michigan. Individual provider, active in the CMS NPPES registry since May 24, 2006.
## Identity
- **NPI:** 1164477204 (Entity type: Individual)
- **Enumerated:** May 24, 2006
- **Primary specialty:** Obstetrics & Gynecology · taxonomy 207V00000X
- **State license:** 4301061615 (Michigan)
- **Sole proprietor:** No
## Practice location
- **Address:** 309 JEFFERSON AVE SE, Grand Rapids, MI 49503-4503
- **Phone:** (616) 685-8750 · **Fax:** (616) 685-8002
## 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): Advantage Health/Saint Mary's Medical Group (NPI 1457863565, Grand Rapids, MI); Mercy Health Partners - Physician Specialist (NPI 1922248772, Muskegon, MI) · CMS Revalidation Reassignment List, October 2026 release
- **Medical school:** Southern Illinois University School Of Medicine, class of 1993
## Record status
- **NPPES last updated:** June 29, 2009
- **Other identifiers:** Medicaid 4893290 (MI); Medicare UPIN G60146 (MI); Medicare ID-Type Unspecified M02830106 (MI); and 4 more
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Source: [NPI Profile](https://npiprofile.com/npi/1164477204) · Data from the CMS NPPES public registry.