RYAN MICHAEL MACKENZIE NP
NPI 1891570453
Nurse Practitioner - Acute Care in Ann Arbor, MI
About Ryan Michael Mackenzie Np NPPES
Official registry information on file with the National Plan and Provider Enumeration System.
RYAN MICHAEL MACKENZIE NP (NPI 1891570453) is an individual acute care provider in Ann Arbor, Michigan, licensed in Michigan (4704268806) and active in the NPI registry since August 2023. He is enrolled in Medicare PECOS, is affiliated with Ascension Providence Hospital, Southfield And Novi, and maintains a secondary practice location in Lake Orion.
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 and accepts Medicare assignment
Ryan Michael Mackenzie Np 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
4Medicare enrollment records show Ryan Mackenzie reassigns Medicare billing to 4 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
- 507 clinicians in this Medicare group
Livonia, MI 48154
- Reassigned Medicare billing, Michigan enrollment
- 731 clinicians in this Medicare group
Farmington Hills, MI 48334
- Reassigned Medicare billing, Michigan enrollment
- 23 clinicians in this Medicare group
Detroit, MI 48202
- Reassigned Medicare billing, Michigan enrollment
- 577 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 3
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
Hospitals where this provider delivers care, identified from recent Medicare claims and place-of-service records.
Ascension Providence Hospital, Southfield And Novi
Acute Care Hospitals · Southfield, MIPhysician 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 Ryan Mackenzie's NPI number?
The NPI number for Ryan Mackenzie is 1891570453. It was assigned to this individual provider in the NPPES registry on August 30, 2023.
Where is Ryan Mackenzie located?
Ryan Mackenzie practices at 1500 E Medical Center Dr, Ann Arbor, MI 48109. The listed phone number is (734) 647-5299.
What is Ryan Mackenzie's specialty?
The primary specialty registered for this NPI is Nurse Practitioner, specializing in Acute Care, with taxonomy code 363LA2100X.
Is Ryan Mackenzie enrolled in Medicare?
Yes. Ryan Mackenzie 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 Ryan Mackenzie's services?
According to the CMS Revalidation Reassignment List (October 2026 release), Ryan Mackenzie reassigns Medicare benefits to 4 organizations: Regents Of The University Of Michigan (Ann Arbor, MI), University Physician Group (Livonia, MI), Associates In Neurology, PC (Farmington Hills, MI) and Henry Ford Health System (Detroit, 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 Ryan Mackenzie's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.
What insurance does Ryan Mackenzie accept?
Health plans from Blue Care Network of Michigan, Blue Cross Blue Shield of Michigan Mutual Insurance Company, Priority Health and UnitedHealthcare list Ryan Mackenzie 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 Ryan Mackenzie affiliated with any hospitals?
According to CMS data, Ryan Mackenzie is affiliated with Ascension Providence Hospital, Southfield And Novi.
When was this NPI record last updated?
The NPPES record for Ryan Mackenzie was last updated on April 15, 2025. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 18 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.
# Ryan Michael Mackenzie, NP · NPI 1891570453
Acute Care physician in Ann Arbor, Michigan. Individual provider, active in the CMS NPPES registry since August 30, 2023.
## Identity
- **NPI:** 1891570453 (Entity type: Individual)
- **Enumerated:** August 30, 2023
- **Primary specialty:** Nurse Practitioner - Acute Care · taxonomy 363LA2100X
- **State license:** 4704268806 (Michigan)
- **Sole proprietor:** No
## Practice location
- **Address:** 1500 E MEDICAL CENTER DR, Ann Arbor, MI 48109-5000
- **Phone:** (734) 647-5299
## 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:** 4 organizations under Medicare reassignment (form CMS-855R): Regents Of The University Of Michigan (NPI 1447275102, Ann Arbor, MI); University Physician Group (NPI 1356556575, Livonia, MI); Associates In Neurology, PC (NPI 1891792628, Farmington Hills, MI); Henry Ford Health System (NPI 1104900455, Detroit, MI) · CMS Revalidation Reassignment List, October 2026 release
- **Medical school:** Other, class of 2023
## Record status
- **NPPES last updated:** April 15, 2025
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Source: [NPI Profile](https://npiprofile.com/npi/1891570453) · Data from the CMS NPPES public registry.