MRS. KAREN KAY TUMBLIN NURSE PRACTITIONER
NPI 1235604679
Nurse Practitioner in Bay City, MI
About Mrs. Karen Kay Tumblin Nurse Practitioner NPPES
Official registry information on file with the National Plan and Provider Enumeration System.
MRS. KAREN KAY TUMBLIN NURSE PRACTITIONER (NPI 1235604679) is an individual nurse practitioner in Bay City, Michigan, licensed in Michigan (4704254478) and active in the NPI registry since October 2018. She is enrolled in Medicare PECOS, is affiliated with Mclaren Bay Region, and is a graduate of Other (2018).
NPPES Registry Identity
Specialties & Licenses
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
Mrs. Karen Kay Tumblin Nurse Practitioner 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 Karen Tumblin reassigns Medicare billing to 1 organization. The organization bills Medicare for the services this provider delivers there.
Bay City, MI 48708
- Reassigned Medicare billing, Michigan enrollment
- 250 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
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
Hospitals where this provider delivers care, identified from recent Medicare claims and place-of-service records.
Mclaren Bay Region
Acute Care Hospitals · Bay City, MIPhysician Visit Costs CMS claims · ZIP area
Typical Medicare office-visit costs in the 48706 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.
BAY CITY, MI 48706
BAY CITY, MI 48706
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 Tumblin's NPI number?
The NPI number for Karen Tumblin is 1235604679. It was assigned to this individual provider in the NPPES registry on October 12, 2018.
Where is Karen Tumblin located?
Karen Tumblin practices at 200 S Wenona St, Bay City, MI 48706. The listed phone number is (989) 893-8116.
What is Karen Tumblin's specialty?
The primary specialty registered for this NPI is Nurse Practitioner with taxonomy code 363L00000X.
Is Karen Tumblin enrolled in Medicare?
Yes. Karen Tumblin 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 Karen Tumblin's services?
According to the CMS Revalidation Reassignment List (October 2026 release), Karen Tumblin reassigns Medicare benefits to Mclaren Bay Region (Bay City, MI). 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 Karen Tumblin's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.
What insurance does Karen Tumblin accept?
Health plans from Ambetter Health, Ambetter from Buckeye Health Plan, Ambetter from Meridian, Priority Health and UnitedHealthcare list Karen Tumblin 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 Tumblin affiliated with any hospitals?
According to CMS data, Karen Tumblin is affiliated with Mclaren Bay Region.
When was this NPI record last updated?
The NPPES record for Karen Tumblin was last updated on October 12, 2018. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 8 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.
# Mrs. Karen Kay Tumblin, NURSE PRACTITIONER · NPI 1235604679
Nurse Practitioner physician in Bay City, Michigan. Individual provider, active in the CMS NPPES registry since October 12, 2018.
## Identity
- **NPI:** 1235604679 (Entity type: Individual)
- **Enumerated:** October 12, 2018
- **Primary specialty:** Nurse Practitioner · taxonomy 363L00000X
- **State license:** 4704254478 (Michigan)
- **Sole proprietor:** Yes
## Practice location
- **Address:** 200 S WENONA ST, Bay City, MI 48706-8820
- **Phone:** (989) 893-8116
## 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:** Mclaren Bay Region (NPI 1508131087, Bay City, MI), under Medicare reassignment (form CMS-855R) · CMS Revalidation Reassignment List, October 2026 release
- **Medical school:** Other, class of 2018
## Record status
- **NPPES last updated:** October 12, 2018
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Source: [NPI Profile](https://npiprofile.com/npi/1235604679) · Data from the CMS NPPES public registry.