SANDRA M HERRMANN MD
NPI 1790964088
Internal Medicine - Nephrology in Rochester, MN
About Sandra M Herrmann Md NPPES
Official registry information on file with the National Plan and Provider Enumeration System.
SANDRA M HERRMANN MD (NPI 1790964088) is an individual nephrology provider in Rochester, Minnesota, licensed in Minnesota (51936) and active in the NPI registry since November 2007. She is enrolled in Medicare PECOS, is affiliated with Mayo Clinic Hospital Rochester, and is a graduate of Other (1997).
NPPES Registry Identity
Specialties & Licenses 2
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
Sandra M Herrmann 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 Reassignments
3Medicare enrollment records show Sandra Herrmann reassigns Medicare billing to 3 organizations. Each organization bills Medicare for the services this provider delivers there; the nearest is listed first.
Rochester, MN 55905
- Reassigned Medicare billing, Minnesota enrollment
- 6,534 clinicians in this Medicare group
Red Wing, MN 55066
- Reassigned Medicare billing, Minnesota enrollment
- 1,571 clinicians in this Medicare group
Winona, MN 55987
- Reassigned Medicare billing, Minnesota enrollment
- 330 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 3
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.
Mayo Clinic Hospital Rochester
Acute Care Hospitals · Rochester, MNMayo Clinic Health System - Cannon Falls
Critical Access Hospitals · Cannon Falls, MNPhysician Visit Costs CMS claims · ZIP area
Typical Medicare office-visit costs in the 55905 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.
ROCHESTER, MN 55905
ROCHESTER, MN 55905
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 Sandra Herrmann's NPI number?
The NPI number for Sandra Herrmann is 1790964088. It was assigned to this individual provider in the NPPES registry on November 2, 2007.
Where is Sandra Herrmann located?
Sandra Herrmann practices at 200 1st St SW, Rochester, MN 55905. The listed phone number is (507) 284-2511.
What is Sandra Herrmann's specialty?
The primary specialty registered for this NPI is Internal Medicine, specializing in Nephrology, with taxonomy code 207RN0300X.
Is Sandra Herrmann enrolled in Medicare?
Yes. Sandra Herrmann 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 Sandra Herrmann's services?
According to the CMS Revalidation Reassignment List (October 2026 release), Sandra Herrmann reassigns Medicare benefits to 3 organizations: Mayo Clinic (Rochester, MN), Mayo Clinic Health System-Southeast Minnesota Region (Red Wing, MN) and Winona Health Services (Winona, MN). 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 Sandra Herrmann's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.
Is Sandra Herrmann affiliated with any hospitals?
According to CMS data, Sandra Herrmann is affiliated with Mayo Clinic Hospital Rochester and Mayo Clinic Health System - Cannon Falls.
When was this NPI record last updated?
The NPPES record for Sandra Herrmann was last updated on August 14, 2020. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 6 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.
# Sandra M Herrmann, MD · NPI 1790964088
Nephrology physician in Rochester, Minnesota. Individual provider, active in the CMS NPPES registry since November 2, 2007.
## Identity
- **NPI:** 1790964088 (Entity type: Individual)
- **Enumerated:** November 2, 2007
- **Primary specialty:** Internal Medicine - Nephrology · taxonomy 207RN0300X
- **State license:** 51936 (Minnesota)
- **Sole proprietor:** No
## Practice location
- **Address:** 200 1ST ST SW, Rochester, MN 55905
- **Phone:** (507) 284-2511
## 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:** 3 organizations under Medicare reassignment (form CMS-855R): Mayo Clinic (NPI 1114343860, Rochester, MN); Mayo Clinic Health System-Southeast Minnesota Region (NPI 1114453883, Red Wing, MN); Winona Health Services (NPI 1295789352, Winona, MN) · CMS Revalidation Reassignment List, October 2026 release
- **Medical school:** Other, class of 1997
## Record status
- **NPPES last updated:** August 14, 2020
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Source: [NPI Profile](https://npiprofile.com/npi/1790964088) · Data from the CMS NPPES public registry.