TAMMY JEAN CASS NP-BC
NPI 1902459159
Nurse Practitioner - Family in Warren, MI
About Tammy Jean Cass Np-bc NPPES
Official registry information on file with the National Plan and Provider Enumeration System.
TAMMY JEAN CASS NP-BC (NPI 1902459159) is an individual family provider in Warren, Michigan, licensed in Michigan (4704211290) and active in the NPI registry since July 2019. She is enrolled in Medicare PECOS, is affiliated with Ascension St John Hospital, and is a graduate of Other (2019).
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
Tammy Jean Cass Np-bc 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
6Medicare enrollment records show Tammy Cass reassigns Medicare billing to 6 organizations. Each organization bills Medicare for the services this provider delivers there; the nearest is listed first.
Warren, MI 48089
- Reassigned Medicare billing, Michigan enrollment
- 60 clinicians in this Medicare group
Roseville, MI 48066
- Reassigned Medicare billing, Michigan enrollment
- 31 clinicians in this Medicare group
Harper Woods, MI 48225
- Reassigned Medicare billing, Michigan enrollment
- 21 clinicians in this Medicare group
Detroit, MI 48236
- Reassigned Medicare billing, Michigan enrollment
- 41 clinicians in this Medicare group
Southfield, MI 48034
- Reassigned Medicare billing, Michigan enrollment
- 11 clinicians in this Medicare group
Ann Arbor, MI 48104
- Reassigned Medicare billing, Michigan enrollment
- 32 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.
Hospital Affiliations CMS Care Compare
Hospitals where this provider delivers care, identified from recent Medicare claims and place-of-service records.
Ascension St John Hospital
Acute Care Hospitals · Detroit, MIPhysician Visit Costs CMS claims · ZIP area
Typical Medicare office-visit costs in the 48093 ZIP code area, from fee-for-service claims. These are area statistics, not this provider’s prices; actual charges vary by service and coverage.
Referred Medical Equipment & Supplies CMS DME claims 2
Durable medical equipment, devices and supplies this provider ordered from DME suppliers for patients, from Medicare fee-for-service claims.
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.
WARREN, MI 48093
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 Tammy Cass's NPI number?
The NPI number for Tammy Cass is 1902459159. It was assigned to this individual provider in the NPPES registry on July 17, 2019.
Where is Tammy Cass located?
Tammy Cass practices at 11900 E 12 Mile Rd, Warren, MI 48093. The listed phone number is (586) 582-7100.
What is Tammy Cass's specialty?
The primary specialty registered for this NPI is Nurse Practitioner, specializing in Family, with taxonomy code 363LF0000X.
Is Tammy Cass enrolled in Medicare?
Yes. Tammy Cass 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 Tammy Cass's services?
According to the CMS Revalidation Reassignment List (October 2026 release), Tammy Cass reassigns Medicare benefits to 6 organizations: Hoover Urgent Care Of Warren PLLC (Warren, MI), Roseville Urgent Care, PC (Roseville, MI), Get Well Urgent Care Harper Woods Plc (Harper Woods, MI), Henry Ford Semi Medical Group (Detroit, MI), Healox Health PLLC (Southfield, MI) and 1 more organization, 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 Tammy Cass's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.
What insurance does Tammy Cass accept?
Health plans from Ambetter Health, Ambetter from Buckeye Health Plan, Ambetter from Meridian, Blue Care Network of Michigan and Blue Cross Blue Shield of Michigan Mutual Insurance Company and 1 other insurer list Tammy Cass 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 Tammy Cass affiliated with any hospitals?
According to CMS data, Tammy Cass is affiliated with Ascension St John Hospital.
When was this NPI record last updated?
The NPPES record for Tammy Cass was last updated on July 24, 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.
# Tammy Jean Cass, NP-BC · NPI 1902459159
Family physician in Warren, Michigan. Individual provider, active in the CMS NPPES registry since July 17, 2019.
## Identity
- **NPI:** 1902459159 (Entity type: Individual)
- **Enumerated:** July 17, 2019
- **Primary specialty:** Nurse Practitioner - Family · taxonomy 363LF0000X
- **State license:** 4704211290 (Michigan)
- **Sole proprietor:** No
## Practice location
- **Address:** 11900 E 12 MILE RD, Warren, MI 48093-3400
- **Phone:** (586) 582-7100 · **Fax:** (586) 582-7101
## 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:** 6 organizations under Medicare reassignment (form CMS-855R): Hoover Urgent Care Of Warren PLLC (NPI 1821351610, Warren, MI); Roseville Urgent Care, PC (NPI 1811297070, Roseville, MI); Get Well Urgent Care Harper Woods Plc (NPI 1609585025, Harper Woods, MI); Henry Ford Semi Medical Group (NPI 1629272968, Detroit, MI); Healox Health PLLC (NPI 1376159491, Southfield, MI); and 1 more · CMS Revalidation Reassignment List, October 2026 release
- **Medical school:** Other, class of 2019
## Record status
- **NPPES last updated:** July 24, 2019
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Source: [NPI Profile](https://npiprofile.com/npi/1902459159) · Data from the CMS NPPES public registry.