DR. WILLIAM KEEN HART M.D.
NPI 1528357746
Anesthesiology in Ann Arbor, MI
About Dr. William Keen Hart M.d. NPPES
Official registry information on file with the National Plan and Provider Enumeration System.
DR. WILLIAM KEEN HART M.D. (NPI 1528357746) is an individual anesthesiology provider in Ann Arbor, Michigan, licensed in Michigan (4301111950) and active in the NPI registry since March 2011. He is enrolled in Medicare PECOS, is affiliated with Central Vermont Medical Center, and is a graduate of Other (2011).
NPPES Registry Identity
Specialties & Licenses 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
Dr. William Keen Hart M.d. 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 Reassignment
Medicare enrollment records show William Hart reassigns Medicare billing to 1 organization. The organization bills Medicare for the services this provider delivers there.
Burlington, VT 05401
- Reassigned Medicare billing, Vermont enrollment
- 1,643 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 4
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 2
Hospitals where this provider delivers care, identified from recent Medicare claims and place-of-service records.
Central Vermont Medical Center
Acute Care Hospitals · Barre, VTUniv. Of Vermont - Fletcher Allen Health Care
Acute Care Hospitals · Burlington, VTOther 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 William Hart's NPI number?
The NPI number for William Hart is 1528357746. It was assigned to this individual provider in the NPPES registry on March 29, 2011.
Where is William Hart located?
William Hart practices at 1500 E Medical Center Dr 1h247 University Hospital, Ann Arbor, MI 48109. The listed phone number is (734) 936-4280.
What is William Hart's specialty?
The primary specialty registered for this NPI is Anesthesiology with taxonomy code 207L00000X.
Is William Hart enrolled in Medicare?
Yes. William Hart 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 organization bills Medicare for William Hart's services?
According to the CMS Revalidation Reassignment List (October 2026 release), William Hart reassigns Medicare benefits to University Of Vermont Medical Center Inc (Burlington, VT). The 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 William Hart's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.
What insurance does William Hart accept?
Health plans from Anthem Blue Cross and Blue Shield list William Hart 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 William Hart affiliated with any hospitals?
According to CMS data, William Hart is affiliated with Central Vermont Medical Center and Univ. Of Vermont - Fletcher Allen Health Care.
When was this NPI record last updated?
The NPPES record for William Hart was last updated on July 21, 2022. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 4 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.
# Dr. William Keen Hart, M.D. · NPI 1528357746
Anesthesiology physician in Ann Arbor, Michigan. Individual provider, active in the CMS NPPES registry since March 29, 2011.
## Identity
- **NPI:** 1528357746 (Entity type: Individual)
- **Enumerated:** March 29, 2011
- **Primary specialty:** Anesthesiology · taxonomy 207L00000X
- **State license:** 4301111950 (Michigan)
- **Sole proprietor:** No
## Practice location
- **Address:** 1500 E MEDICAL CENTER DR, 1H247 UNIVERSITY HOSPITAL, Ann Arbor, MI 48109-5048
- **Phone:** (734) 936-4280
## 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:** University Of Vermont Medical Center Inc (NPI 1659309615, Burlington, VT), under Medicare reassignment (form CMS-855R) · CMS Revalidation Reassignment List, October 2026 release
- **Medical school:** Other, class of 2011
## Record status
- **NPPES last updated:** July 21, 2022
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Source: [NPI Profile](https://npiprofile.com/npi/1528357746) · Data from the CMS NPPES public registry.