MARY FLEMING ACKENBOM MD
NPI 1245559848
Obstetrics & Gynecology in Ann Arbor, MI
About Mary Fleming Ackenbom Md NPPES
Official registry information on file with the National Plan and Provider Enumeration System.
MARY FLEMING ACKENBOM MD (NPI 1245559848) is an individual obstetrics & gynecology provider in Ann Arbor, Michigan, licensed in Michigan (4301514645) and active in the NPI registry since May 2010. She is enrolled in Medicare PECOS and maintains a secondary practice location in Pittsburgh.
NPPES Registry Identity
Specialties & Licenses 2
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 (PECOS)
Mary Fleming Ackenbom Md is registered in the CMS Provider Enrollment, Chain and Ownership System (PECOS).
Medicare Billing Reassignments
2Medicare enrollment records show Mary Ackenbom 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
- 128 clinicians in this Medicare group
East Liverpool, OH 43920
- Reassigned Medicare billing, Pennsylvania enrollment
- 7,114 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 8
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.
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.
Referred Medical Equipment & Supplies CMS DME claims 2
Durable medical equipment, devices and supplies this provider ordered from DME suppliers for patients, from Medicare fee-for-service claims.
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 Ackenbom's NPI number?
The NPI number for Mary Ackenbom is 1245559848. It was assigned to this individual provider in the NPPES registry on May 21, 2010.
Where is Mary Ackenbom located?
Mary Ackenbom practices at 1500 E Medical Center Dr, Ann Arbor, MI 48109. The listed phone number is (734) 936-5000.
What is Mary Ackenbom's specialty?
The primary specialty registered for this NPI is Obstetrics & Gynecology with taxonomy code 207V00000X.
Is Mary Ackenbom enrolled in Medicare?
Yes. Mary Ackenbom is registered in the Medicare PECOS enrollment system.
Which organizations bill Medicare for Mary Ackenbom's services?
According to the CMS Revalidation Reassignment List (October 2026 release), Mary Ackenbom reassigns Medicare benefits to 2 organizations: Regents Of The University Of Michigan (Ann Arbor, MI) and University Of Pittsburgh Physicians (East Liverpool, OH). 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 Ackenbom's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.
What insurance does Mary Ackenbom accept?
Health plans from Blue Care Network of Michigan, Blue Cross Blue Shield of Michigan Mutual Insurance Company and Priority Health list Mary Ackenbom 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 Ackenbom was last updated on January 30, 2026. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 8 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.
# Mary Fleming Ackenbom, MD · NPI 1245559848
Obstetrics & Gynecology physician in Ann Arbor, Michigan. Individual provider, active in the CMS NPPES registry since May 21, 2010.
## Identity
- **NPI:** 1245559848 (Entity type: Individual)
- **Enumerated:** May 21, 2010
- **Primary specialty:** Obstetrics & Gynecology · taxonomy 207V00000X
- **State license:** 4301514645 (Michigan)
- **Sole proprietor:** No
## Practice location
- **Address:** 1500 E MEDICAL CENTER DR, Ann Arbor, MI 48109-5000
- **Phone:** (734) 936-5000
## Medicare
- **Medicare:** Enrolled in Medicare (PECOS)
- **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): Regents Of The University Of Michigan (NPI 1639104854, Ann Arbor, MI); University Of Pittsburgh Physicians (NPI 1811945793, East Liverpool, OH) · CMS Revalidation Reassignment List, October 2026 release
## Record status
- **NPPES last updated:** January 30, 2026
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Source: [NPI Profile](https://npiprofile.com/npi/1245559848) · Data from the CMS NPPES public registry.