BRENDA J GRASS MD
NPI 1356332753
Internal Medicine - Adolescent Medicine in Fond Du Lac, WI
About Brenda J Grass Md NPPES
Official registry information on file with the National Plan and Provider Enumeration System.
BRENDA J GRASS MD (NPI 1356332753) is an individual adolescent medicine provider in Fond Du Lac, Wisconsin, licensed in Wisconsin (43233) and active in the NPI registry since November 2005. She is enrolled in Medicare PECOS, is affiliated with St. Agnes Hospital Hospice, and is a graduate of Medical College Of Wisconsin (1992).
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
Brenda J Grass Md 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 Brenda Grass reassigns Medicare billing to 1 organization. The organization bills Medicare for the services this provider delivers there.
Fond Du Lac, WI 54935
- Reassigned Medicare billing, Wisconsin enrollment
- 606 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 4
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.
St. Agnes Hospital Hospice
Acute Care Hospitals · Fond Du Lac, WIReferred Medical Equipment & Supplies CMS DME claims
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.
FOND DU LAC, WI 54935
FOND DU LAC, WI 54935
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 Brenda Grass's NPI number?
The NPI number for Brenda Grass is 1356332753. It was assigned to this individual provider in the NPPES registry on November 3, 2005.
Where is Brenda Grass located?
Brenda Grass practices at 420 E Division St, Fond Du Lac, WI 54935. The listed phone number is (920) 926-8615.
What is Brenda Grass's specialty?
The primary specialty registered for this NPI is Internal Medicine, specializing in Adolescent Medicine, with taxonomy code 207RA0000X.
Is Brenda Grass enrolled in Medicare?
Yes. Brenda Grass 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 Brenda Grass's services?
According to the CMS Revalidation Reassignment List (October 2026 release), Brenda Grass reassigns Medicare benefits to Agnesian Healthcare Inc (Fond Du Lac, WI). 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 Brenda Grass's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.
What insurance does Brenda Grass accept?
Health plans from Dean Health Plan, Network Health and Quartz list Brenda Grass 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 Brenda Grass affiliated with any hospitals?
According to CMS data, Brenda Grass is affiliated with St. Agnes Hospital Hospice.
When was this NPI record last updated?
The NPPES record for Brenda Grass was last updated on December 10, 2020. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 5 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.
# Brenda J Grass, MD · NPI 1356332753
Adolescent Medicine physician in Fond Du Lac, Wisconsin. Individual provider, active in the CMS NPPES registry since November 3, 2005.
## Identity
- **NPI:** 1356332753 (Entity type: Individual)
- **Enumerated:** November 3, 2005
- **Primary specialty:** Internal Medicine - Adolescent Medicine · taxonomy 207RA0000X
- **State license:** 43233 (Wisconsin)
- **Sole proprietor:** No
## Practice location
- **Address:** 420 E DIVISION ST, Fond Du Lac, WI 54935-4560
- **Phone:** (920) 926-8615
## 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:** Agnesian Healthcare Inc (NPI 1730162991, Fond Du Lac, WI), under Medicare reassignment (form CMS-855R) · CMS Revalidation Reassignment List, October 2026 release
- **Medical school:** Medical College Of Wisconsin, class of 1992
## Record status
- **NPPES last updated:** December 10, 2020
- **Other identifiers:** Medicaid 34090400 (WI); Other 110221539 (WI)
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Source: [NPI Profile](https://npiprofile.com/npi/1356332753) · Data from the CMS NPPES public registry.