TIMOTHY CAHILL M.D.
NPI 1215977400
Anesthesiology in Ann Arbor, MI
About Timothy Cahill M.d. NPPES
Official registry information on file with the National Plan and Provider Enumeration System.
TIMOTHY CAHILL M.D. (NPI 1215977400) is an individual anesthesiology provider in Ann Arbor, Michigan, licensed in Michigan (4301086007) and active in the NPI registry since June 2006. He is enrolled in Medicare PECOS, is affiliated with Saint Joseph Mercy Livingston Hospital, and is a graduate of University Of Iowa, Rj & L Carver College Of Medicine (2001).
NPPES Registry Identity
Specialties & Licenses
Other Identifiers 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)
Timothy Cahill M.d. is registered in the CMS Provider Enrollment, Chain and Ownership System (PECOS).
Medicare Billing Reassignments
3Medicare enrollment records show Timothy Cahill reassigns Medicare billing to 3 organizations. Each organization bills Medicare for the services this provider delivers there; the nearest is listed first.
Westland, MI 48186
- Reassigned Medicare billing, Michigan enrollment
- 273 clinicians in this Medicare group
Livonia, MI 48154
- Reassigned Medicare billing, Michigan enrollment
- 97 clinicians in this Medicare group
Toledo, OH 43623
- Reassigned Medicare billing, Ohio enrollment
- 44 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 7
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.
Saint Joseph Mercy Livingston Hospital
Acute Care Hospitals · Howell, MITrinity Health Ann Arbor Hospital
Acute Care Hospitals · Ann Arbor, MIMedicare 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.
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 48105
ANN ARBOR, MI 48105
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 Timothy Cahill's NPI number?
The NPI number for Timothy Cahill is 1215977400. It was assigned to this individual provider in the NPPES registry on June 7, 2006.
Where is Timothy Cahill located?
Timothy Cahill practices at 2006 Hogback Rd Suite 5, Ann Arbor, MI 48105. The listed phone number is (734) 786-4940.
What is Timothy Cahill's specialty?
The primary specialty registered for this NPI is Anesthesiology with taxonomy code 207L00000X.
Is Timothy Cahill enrolled in Medicare?
Yes. Timothy Cahill is registered in the Medicare PECOS enrollment system.
Which organizations bill Medicare for Timothy Cahill's services?
According to the CMS Revalidation Reassignment List (October 2026 release), Timothy Cahill reassigns Medicare benefits to 3 organizations: Anesthesia Associates Of Ann Arbor, PLLC (Westland, MI), St Mary Mercy Hospital Crna (Livonia, MI) and A4 Of Ohio, LLC (Toledo, 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 Timothy Cahill's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.
What insurance does Timothy Cahill accept?
Health plans from Ambetter Health, Ambetter from Buckeye Health Plan and Ambetter from Meridian list Timothy Cahill 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 Timothy Cahill affiliated with any hospitals?
According to CMS data, Timothy Cahill is affiliated with Saint Joseph Mercy Livingston Hospital and Trinity Health Ann Arbor Hospital.
When was this NPI record last updated?
The NPPES record for Timothy Cahill was last updated on August 6, 2019. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 7 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.
# Timothy Cahill, M.D. · NPI 1215977400
Anesthesiology physician in Ann Arbor, Michigan. Individual provider, active in the CMS NPPES registry since June 7, 2006.
## Identity
- **NPI:** 1215977400 (Entity type: Individual)
- **Enumerated:** June 7, 2006
- **Primary specialty:** Anesthesiology · taxonomy 207L00000X
- **State license:** 4301086007 (Michigan)
- **Sole proprietor:** No
## Practice location
- **Address:** 2006 HOGBACK RD, SUITE 5, Ann Arbor, MI 48105-9750
- **Phone:** (734) 786-4940
## 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:** 3 organizations under Medicare reassignment (form CMS-855R): Anesthesia Associates Of Ann Arbor, PLLC (NPI 1669581997, Westland, MI); St Mary Mercy Hospital Crna (NPI 1063602092, Livonia, MI); A4 Of Ohio, LLC (NPI 1255996567, Toledo, OH) · CMS Revalidation Reassignment List, October 2026 release
- **Medical school:** University Of Iowa, Rj & L Carver College Of Medicine, class of 2001
## Record status
- **NPPES last updated:** August 6, 2019
- **Other identifiers:** Medicaid 104779544 (MI)
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Source: [NPI Profile](https://npiprofile.com/npi/1215977400) · Data from the CMS NPPES public registry.