KAREN ZIARNOWSKI CARVER DDS, MD
NPI 1043623473
Dentist - Oral and Maxillofacial Surgery in Ann Arbor, MI
About Karen Ziarnowski Carver Dds, Md NPPES
Official registry information on file with the National Plan and Provider Enumeration System.
KAREN ZIARNOWSKI CARVER DDS, MD (NPI 1043623473) is an individual oral and maxillofacial surgery provider in Ann Arbor, Michigan, licensed in Michigan (2901021204) and active in the NPI registry since June 2014. She is enrolled in Medicare PECOS, is affiliated with University Of Michigan Health System, and is a graduate of University Of Michigan Medical School (2018).
NPPES Registry Identity
Specialties & Licenses 2
Other Names 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
Karen Ziarnowski Carver Dds, 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 Karen Carver 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
- 13 clinicians in this Medicare group
Lansing, MI 48912
- Reassigned Medicare billing, Michigan enrollment
- 48 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.
University Of Michigan Health System
Acute Care Hospitals · Ann Arbor, 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 Karen Carver's NPI number?
The NPI number for Karen Carver is 1043623473. It was assigned to this individual provider in the NPPES registry on June 3, 2014. The provider is also known as Karen Lyn Ziarnowski.
Where is Karen Carver located?
Karen Carver practices at 1500 E Medical Center Dr, Ann Arbor, MI 48109. The listed phone number is (734) 936-4000.
What is Karen Carver's specialty?
The primary specialty registered for this NPI is Dentist, specializing in Oral and Maxillofacial Surgery, with taxonomy code 1223S0112X.
Is Karen Carver enrolled in Medicare?
Yes. Karen Carver 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 Karen Carver's services?
According to the CMS Revalidation Reassignment List (October 2026 release), Karen Carver reassigns Medicare benefits to 2 organizations: Regents Of The University Of Michigan (Ann Arbor, MI) and Edward W Sparrow Hospital Association (Lansing, 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 Karen Carver's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.
What insurance does Karen Carver accept?
Health plans from Ambetter Health, Ambetter from Buckeye Health Plan, Ambetter from Meridian, Blue Care Network of Michigan and Blue Cross Blue Shield of Michigan Mutual Insurance Company and 3 other insurers list Karen Carver 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 Karen Carver affiliated with any hospitals?
According to CMS data, Karen Carver is affiliated with University Of Michigan Health System.
When was this NPI record last updated?
The NPPES record for Karen Carver was last updated on August 26, 2025. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 13 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.
# Karen Ziarnowski Carver, DDS, MD · NPI 1043623473
Oral and Maxillofacial Surgery provider in Ann Arbor, Michigan. Individual provider, active in the CMS NPPES registry since June 3, 2014.
## Identity
- **NPI:** 1043623473 (Entity type: Individual)
- **Enumerated:** June 3, 2014
- **Primary specialty:** Dentist - Oral and Maxillofacial Surgery · taxonomy 1223S0112X
- **State license:** 2901021204 (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
- **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 1467487694, Ann Arbor, MI); Edward W Sparrow Hospital Association (NPI 1457744666, Lansing, MI) · CMS Revalidation Reassignment List, October 2026 release
- **Medical school:** University Of Michigan Medical School, class of 2018
## Record status
- **NPPES last updated:** August 26, 2025
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Source: [NPI Profile](https://npiprofile.com/npi/1043623473) · Data from the CMS NPPES public registry.