TIMOTHY MAHON M.D.
NPI 1194012807
Emergency Medicine in Lansing, MI
About Timothy Mahon M.d. NPPES
Official registry information on file with the National Plan and Provider Enumeration System.
TIMOTHY MAHON M.D. (NPI 1194012807) is an individual emergency medicine provider in Lansing, Michigan, licensed in Michigan (4301099350) and active in the NPI registry since July 2011. He is enrolled in Medicare PECOS, is affiliated with Mclaren Bay Region, and is a graduate of Michigan State University College Of Osteopathic Medicine (2011).
NPPES Registry Identity
Specialties & Licenses
Other Identifiers 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
Timothy Mahon 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 Reassignments
7Medicare enrollment records show Timothy Mahon reassigns Medicare billing to 7 organizations. Each organization bills Medicare for the services this provider delivers there; the nearest is listed first.
Lansing, MI 48910
- Reassigned Medicare billing, Michigan enrollment
- 295 clinicians in this Medicare group
Portland, MI 48875
- Reassigned Medicare billing, Michigan enrollment
- Also billed through NPI 1700820065 (Michigan)
- 317 clinicians in this Medicare group
Flint, MI 48532
- Reassigned Medicare billing, Michigan enrollment
- 444 clinicians in this Medicare group
Hillsdale, MI 49242
- Reassigned Medicare billing, Michigan enrollment
- 58 clinicians in this Medicare group
Engadine, MI 49827
- Reassigned Medicare billing, Michigan enrollment
- Also billed through NPI 1497742050 (Michigan)
- 43 clinicians in this Medicare group
Escanaba, MI 49829
- Reassigned Medicare billing, Michigan enrollment
- 440 clinicians in this Medicare group
Houghton, MI 49931
- Reassigned Medicare billing, Michigan enrollment
- 130 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 5
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 3
Hospitals where this provider delivers care, identified from recent Medicare claims and place-of-service records.
Mclaren Bay Region
Acute Care Hospitals · Bay City, MIUphs Marquette Dlp Hospital
Acute Care Hospitals · Marquette, MIHelen Newberry Joy Hospital
Critical Access Hospitals · Newberry, MIPhysician Visit Costs CMS claims · ZIP area
Typical Medicare office-visit costs in the 48912 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.
LANSING, MI 48912
LANSING, MI 48912
LANSING, MI 48912
LANSING, MI 48912
LANSING, MI 48912
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 Mahon's NPI number?
The NPI number for Timothy Mahon is 1194012807. It was assigned to this individual provider in the NPPES registry on July 1, 2011.
Where is Timothy Mahon located?
Timothy Mahon practices at 1215 E Michigan Ave, Lansing, MI 48912. The listed phone number is (517) 364-1000.
What is Timothy Mahon's specialty?
The primary specialty registered for this NPI is Emergency Medicine with taxonomy code 207P00000X.
Is Timothy Mahon enrolled in Medicare?
Yes. Timothy Mahon 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 Timothy Mahon's services?
According to the CMS Revalidation Reassignment List (October 2026 release), Timothy Mahon reassigns Medicare benefits to 7 organizations: Degara App, PLLC (Lansing, MI), Sparrow Ionia Hospital (Portland, MI), Mclaren Hospital Group (Flint, MI), Hillsdale Emergency Physicians, P.C. (Hillsdale, MI), Helen Newberry Joy Hospital & Healthcare Center (Engadine, MI) and 2 more organizations, listed in the Medicare section above. 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 Mahon's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.
What insurance does Timothy Mahon accept?
Health plans from Priority Health list Timothy Mahon 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 Mahon affiliated with any hospitals?
According to CMS data, Timothy Mahon is affiliated with Mclaren Bay Region, Uphs Marquette Dlp Hospital and Helen Newberry Joy Hospital.
When was this NPI record last updated?
The NPPES record for Timothy Mahon was last updated on February 16, 2016. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 10 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 Mahon, M.D. · NPI 1194012807
Emergency Medicine physician in Lansing, Michigan. Individual provider, active in the CMS NPPES registry since July 1, 2011.
## Identity
- **NPI:** 1194012807 (Entity type: Individual)
- **Enumerated:** July 1, 2011
- **Primary specialty:** Emergency Medicine · taxonomy 207P00000X
- **State license:** 4301099350 (Michigan)
- **Sole proprietor:** No
## Practice location
- **Address:** 1215 E MICHIGAN AVE, Lansing, MI 48912-1811
- **Phone:** (517) 364-1000
## 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:** 7 organizations under Medicare reassignment (form CMS-855R): Degara App, PLLC (NPI 1265976971, Lansing, MI); Sparrow Ionia Hospital (NPI 1295801108, Portland, MI); Mclaren Hospital Group (NPI 1942026174, Flint, MI); Hillsdale Emergency Physicians, P.C. (NPI 1669018206, Hillsdale, MI); Helen Newberry Joy Hospital & Healthcare Center (NPI 1033266002, Engadine, MI); and 2 more · CMS Revalidation Reassignment List, October 2026 release
- **Medical school:** Michigan State University College Of Osteopathic Medicine, class of 2011
## Record status
- **NPPES last updated:** February 16, 2016
- **Other identifiers:** Medicaid 2188763 (LA); Medicare PIN 375821YWM2 (LA)
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Source: [NPI Profile](https://npiprofile.com/npi/1194012807) · Data from the CMS NPPES public registry.