MARTHA FERNE HARTZ M.D.
NPI 1679550206
Pediatrics - Pediatric Allergy/Immunology in Rochester, MN
About Martha Ferne Hartz M.d. NPPES
Official registry information on file with the National Plan and Provider Enumeration System.
MARTHA FERNE HARTZ M.D. (NPI 1679550206) is an individual pediatric allergy/immunology provider in Rochester, Minnesota, licensed in Minnesota (32524) and active in the NPI registry since December 2005. She is enrolled in Medicare PECOS and is a graduate of Other (1988).
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
Martha Ferne Hartz 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
2Medicare enrollment records show Martha Hartz reassigns Medicare billing to 2 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
La Crosse, WI 54601
- Reassigned Medicare billing, Wisconsin enrollment
- 1,003 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.
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 Martha Hartz's NPI number?
The NPI number for Martha Hartz is 1679550206. It was assigned to this individual provider in the NPPES registry on December 23, 2005.
Where is Martha Hartz located?
Martha Hartz practices at 200 1st St SW, Rochester, MN 55905. The listed phone number is (507) 284-2511.
What is Martha Hartz's specialty?
The primary specialty registered for this NPI is Pediatrics, specializing in Pediatric Allergy/Immunology, with taxonomy code 2080P0201X.
Is Martha Hartz enrolled in Medicare?
Yes. Martha Hartz 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 Martha Hartz's services?
According to the CMS Revalidation Reassignment List (October 2026 release), Martha Hartz reassigns Medicare benefits to 2 organizations: Mayo Clinic (Rochester, MN) and Mayo Clinic Health System-Southwest Wisconsin Region, Inc. (La Crosse, WI). 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 Martha Hartz's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.
When was this NPI record last updated?
The NPPES record for Martha Hartz was last updated on May 7, 2021. 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.
# Martha Ferne Hartz, M.D. · NPI 1679550206
Pediatric Allergy/Immunology physician in Rochester, Minnesota. Individual provider, active in the CMS NPPES registry since December 23, 2005.
## Identity
- **NPI:** 1679550206 (Entity type: Individual)
- **Enumerated:** December 23, 2005
- **Primary specialty:** Pediatrics - Pediatric Allergy/Immunology · taxonomy 2080P0201X
- **State license:** 32524 (Minnesota)
- **Sole proprietor:** No
## Practice location
- **Address:** 200 1ST ST SW, Rochester, MN 55905-0001
- **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:** 2 organizations under Medicare reassignment (form CMS-855R): Mayo Clinic (NPI 1114343860, Rochester, MN); Mayo Clinic Health System-Southwest Wisconsin Region, Inc. (NPI 1629056049, La Crosse, WI) · CMS Revalidation Reassignment List, October 2026 release
- **Medical school:** Other, class of 1988
## Record status
- **NPPES last updated:** May 7, 2021
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Source: [NPI Profile](https://npiprofile.com/npi/1679550206) · Data from the CMS NPPES public registry.