MARY LOU GAGNON CRNA
NPI 1952583445
Nurse Anesthetist, Certified Registered in Pontiac, MI
About Mary Lou Gagnon Crna NPPES
Official registry information on file with the National Plan and Provider Enumeration System.
MARY LOU GAGNON CRNA (NPI 1952583445) is an individual nurse anesthetist, certified registered in Pontiac, Michigan, licensed in Michigan (4704160281) and active in the NPI registry since November 2007. She is affiliated with Trinity Health Oakland Hospital and is a graduate of Other (1990).
NPPES Registry Identity
Specialties & Licenses
Other Identifiers 2
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
Mary Lou Gagnon Crna 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 Mary Gagnon reassigns Medicare billing to 2 organizations. Each organization bills Medicare for the services this provider delivers there; the nearest is listed first.
Waterford, MI 48327
- Reassigned Medicare billing, Michigan enrollment
- 49 clinicians in this Medicare group
Westland, MI 48186
- Reassigned Medicare billing, Michigan enrollment
- 273 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.
Hospital Affiliations CMS Care Compare
Hospitals where this provider delivers care, identified from recent Medicare claims and place-of-service records.
Trinity Health Oakland Hospital
Acute Care Hospitals · Pontiac, MIPhysician Visit Costs CMS claims · ZIP area
Typical Medicare office-visit costs in the 48341 ZIP code area, from fee-for-service claims. These are area statistics, not this provider’s prices; actual charges vary by service and coverage.
Medicare Quality Performance CMS QPP · MIPS
Performance in the CMS Quality Payment Program: the MIPS final score across four weighted categories, and the individual quality measures reported to Medicare.
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.
PONTIAC, MI 48341
PONTIAC, MI 48341
PONTIAC, MI 48341
PONTIAC, MI 48341
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 Mary Gagnon's NPI number?
The NPI number for Mary Gagnon is 1952583445. It was assigned to this individual provider in the NPPES registry on November 27, 2007.
Where is Mary Gagnon located?
Mary Gagnon practices at 44405 Woodward Ave, Pontiac, MI 48341. The listed phone number is (248) 858-6593.
What is Mary Gagnon's specialty?
The primary specialty registered for this NPI is Nurse Anesthetist, Certified Registered with taxonomy code 367500000X.
Is Mary Gagnon enrolled in Medicare?
Yes. Mary Gagnon 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 Mary Gagnon's services?
According to the CMS Revalidation Reassignment List (October 2026 release), Mary Gagnon reassigns Medicare benefits to 2 organizations: Waterford Anesthesia, PLLC (Waterford, MI) and Anesthesia Associates Of Ann Arbor, PLLC (Westland, 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 Mary Gagnon's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.
What insurance does Mary Gagnon accept?
Health plans from Oscar Insurance Company list Mary Gagnon 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 Mary Gagnon affiliated with any hospitals?
According to CMS data, Mary Gagnon is affiliated with Trinity Health Oakland Hospital.
When was this NPI record last updated?
The NPPES record for Mary Gagnon was last updated on June 24, 2010. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 16 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.
# Mary Lou Gagnon, CRNA · NPI 1952583445
Nurse Anesthetist, Certified Registered physician in Pontiac, Michigan. Individual provider, active in the CMS NPPES registry since November 27, 2007.
## Identity
- **NPI:** 1952583445 (Entity type: Individual)
- **Enumerated:** November 27, 2007
- **Primary specialty:** Nurse Anesthetist, Certified Registered · taxonomy 367500000X
- **State license:** 4704160281 (Michigan)
- **Sole proprietor:** No
## Practice location
- **Address:** 44405 WOODWARD AVE, Pontiac, MI 48341-5023
- **Phone:** (248) 858-6593
## Medicare
- **Medicare:** Enrolled (PECOS); accepts Medicare assignment
- **Bills Medicare through:** 2 organizations under Medicare reassignment (form CMS-855R): Waterford Anesthesia, PLLC (NPI 1376862474, Waterford, MI); Anesthesia Associates Of Ann Arbor, PLLC (NPI 1669581997, Westland, MI) · CMS Revalidation Reassignment List, October 2026 release
- **Medical school:** Other, class of 1990
## Record status
- **NPPES last updated:** June 24, 2010
- **Other identifiers:** Medicare PIN F36441035 (MI); Medicaid 437785110 (MI)
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Source: [NPI Profile](https://npiprofile.com/npi/1952583445) · Data from the CMS NPPES public registry.