DR. KENNETH RICHARD HASSLER DO
NPI 1659783348
Thoracic Surgery (Cardiothoracic Vascular Surgery) in Ann Arbor, MI
About Dr. Kenneth Richard Hassler Do NPPES
Official registry information on file with the National Plan and Provider Enumeration System.
DR. KENNETH RICHARD HASSLER DO (NPI 1659783348) is an individual thoracic surgery (cardiothoracic vascular surgery) provider in Ann Arbor, Michigan, licensed in Michigan (5101027406) and active in the NPI registry since May 2014. He is enrolled in Medicare PECOS, maintains 3 additional practice locations, and is a graduate of New York University School Of Medicine (2024).
NPPES Registry Identity
Specialties & Licenses
Secondary Practice Locations 3
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. Kenneth Richard Hassler Do 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 Kenneth Hassler 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
- 2,377 clinicians in this Medicare group
Danbury, CT 06810
- Reassigned Medicare billing, Connecticut enrollment
- 818 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 2
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 Kenneth Hassler's NPI number?
The NPI number for Kenneth Hassler is 1659783348. It was assigned to this individual provider in the NPPES registry on May 29, 2014.
Where is Kenneth Hassler located?
Kenneth Hassler practices at 1500 E Medical Center Dr, Ann Arbor, MI 48109. The listed phone number is (734) 936-4000.
What is Kenneth Hassler's specialty?
The primary specialty registered for this NPI is Thoracic Surgery (Cardiothoracic Vascular Surgery) with taxonomy code 208G00000X.
Is Kenneth Hassler enrolled in Medicare?
Yes. Kenneth Hassler 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 Kenneth Hassler's services?
According to the CMS Revalidation Reassignment List (October 2026 release), Kenneth Hassler reassigns Medicare benefits to 2 organizations: Regents Of The University Of Michigan (Ann Arbor, MI) and Nuvance Health Medical Practice Ct, Inc. (Danbury, CT). 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 Kenneth Hassler's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.
What insurance does Kenneth Hassler accept?
Health plans from Anthem Blue Cross and Blue Shield list Kenneth Hassler 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 Kenneth Hassler was last updated on April 23, 2024. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 2 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. Kenneth Richard Hassler, DO · NPI 1659783348
Thoracic Surgery (Cardiothoracic Vascular Surgery) physician in Ann Arbor, Michigan. Individual provider, active in the CMS NPPES registry since May 29, 2014.
## Identity
- **NPI:** 1659783348 (Entity type: Individual)
- **Enumerated:** May 29, 2014
- **Primary specialty:** Thoracic Surgery (Cardiothoracic Vascular Surgery) · taxonomy 208G00000X
- **State license:** 5101027406 (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 1003848144, Ann Arbor, MI); Nuvance Health Medical Practice Ct, Inc. (NPI 1407898117, Danbury, CT) · CMS Revalidation Reassignment List, October 2026 release
- **Medical school:** New York University School Of Medicine, class of 2024
## Record status
- **NPPES last updated:** April 23, 2024
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Source: [NPI Profile](https://npiprofile.com/npi/1659783348) · Data from the CMS NPPES public registry.