MARY P NEFF CRNA
NPI 1952321275
Nurse Anesthetist, Certified Registered in Ann Arbor, MI
About Mary P Neff Crna NPPES
Official registry information on file with the National Plan and Provider Enumeration System.
MARY P NEFF CRNA (NPI 1952321275) is an individual nurse anesthetist, certified registered in Ann Arbor, Michigan, licensed in Michigan (4704149807) and active in the NPI registry since July 2006. She is a graduate of Other (1996).
NPPES Registry Identity
Specialties & Licenses
Other Identifiers 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
Mary P Neff 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 Neff reassigns Medicare billing to 2 organizations. Each organization bills Medicare for the services this provider delivers there; the nearest is listed first.
Ann Arbor, MI 48109
- Reassigned Medicare billing, Michigan enrollment
- 277 clinicians in this Medicare group
Ypsilanti, MI 48197
- Reassigned Medicare billing, Michigan enrollment
- 123 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 48109 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 20
Providers registered at the same practice address, or within the immediate area, according to the NPPES registry.
ANN ARBOR, MI 48109
ANN ARBOR, MI 48109
ANN ARBOR, MI 48109
ANN ARBOR, MI 48109
ANN ARBOR, MI 48109
ANN ARBOR, MI 48109
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 Neff's NPI number?
The NPI number for Mary Neff is 1952321275. It was assigned to this individual provider in the NPPES registry on July 20, 2006.
Where is Mary Neff located?
Mary Neff practices at 1500 E Medical Center Dr, Ann Arbor, MI 48109. The listed phone number is (734) 936-4000.
What is Mary Neff's specialty?
The primary specialty registered for this NPI is Nurse Anesthetist, Certified Registered with taxonomy code 367500000X.
Is Mary Neff enrolled in Medicare?
Yes. Mary Neff 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 Neff's services?
According to the CMS Revalidation Reassignment List (October 2026 release), Mary Neff reassigns Medicare benefits to 2 organizations: Regents Of The University Of Michigan (Ann Arbor, MI) and Huron Gastroenterology Associates PC (Ypsilanti, 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 Neff's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.
What insurance does Mary Neff accept?
Health plans from Priority Health list Mary Neff 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 Mary Neff was last updated on June 16, 2020. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 6 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 P Neff, CRNA · NPI 1952321275
Nurse Anesthetist, Certified Registered physician in Ann Arbor, Michigan. Individual provider, active in the CMS NPPES registry since July 20, 2006.
## Identity
- **NPI:** 1952321275 (Entity type: Individual)
- **Enumerated:** July 20, 2006
- **Primary specialty:** Nurse Anesthetist, Certified Registered · taxonomy 367500000X
- **State license:** 4704149807 (Michigan)
- **Sole proprietor:** No
## Practice location
- **Address:** 1500 E MEDICAL CENTER DR, Ann Arbor, MI 48109-5000
- **Phone:** (734) 936-4000
## Medicare
- **Medicare:** Enrolled (PECOS); accepts Medicare assignment
- **Bills Medicare through:** 2 organizations under Medicare reassignment (form CMS-855R): Regents Of The University Of Michigan (NPI 1528010428, Ann Arbor, MI); Huron Gastroenterology Associates PC (NPI 1144335639, Ypsilanti, MI) · CMS Revalidation Reassignment List, October 2026 release
- **Medical school:** Other, class of 1996
## Record status
- **NPPES last updated:** June 16, 2020
- **Other identifiers:** Medicaid 3512272 (MI)
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Source: [NPI Profile](https://npiprofile.com/npi/1952321275) · Data from the CMS NPPES public registry.