MARIAN GREENBURG MD
NPI 1720198872
Internal Medicine in Marshfield, WI
About Marian Greenburg Md NPPES
Official registry information on file with the National Plan and Provider Enumeration System.
MARIAN GREENBURG MD (NPI 1720198872) is an individual internal medicine provider in Marshfield, Wisconsin, licensed in Wisconsin (47376) and active in the NPI registry since August 2006. She is enrolled in Medicare PECOS, is affiliated with Marshfield Medical Center, and is a graduate of Yale University School Of Medicine (1987).
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
Marian Greenburg 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
2Medicare enrollment records show Marian Greenburg reassigns Medicare billing to 2 organizations. Each organization bills Medicare for the services this provider delivers there; the nearest is listed first.
Marshfield, WI 54449
- Reassigned Medicare billing, Wisconsin enrollment
- 2,540 clinicians in this Medicare group
Marshfield, WI 54449
- Reassigned Medicare billing, Wisconsin enrollment
- 2,476 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.
Marshfield Medical Center
Acute Care Hospitals · Marshfield, WIMarshfield Medical Center - Neillsville
Critical Access Hospitals · Neillsville, WIPhysician Visit Costs CMS claims · ZIP area
Typical Medicare office-visit costs in the 54449 ZIP code area, from fee-for-service claims. These are area statistics, not this provider’s prices; actual charges vary by service and coverage.
Medicare Quality Performance CMS QPP · MIPS
Performance in the CMS Quality Payment Program: the MIPS final score across four weighted categories, and the individual quality measures reported to Medicare.
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.
MARSHFIELD, WI 54449
MARSHFIELD, WI 54449
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 Marian Greenburg's NPI number?
The NPI number for Marian Greenburg is 1720198872. It was assigned to this individual provider in the NPPES registry on August 30, 2006.
Where is Marian Greenburg located?
Marian Greenburg practices at 1000 N Oak Ave, Marshfield, WI 54449. The listed phone number is (715) 389-3334.
What is Marian Greenburg's specialty?
The primary specialty registered for this NPI is Internal Medicine with taxonomy code 207R00000X.
Is Marian Greenburg enrolled in Medicare?
Yes. Marian Greenburg 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 Marian Greenburg's services?
According to the CMS Revalidation Reassignment List (October 2026 release), Marian Greenburg reassigns Medicare benefits to 2 organizations: Marshfield Clinic Inc (Marshfield, WI) and Mchs Hospitals Inc (Marshfield, 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 Marian Greenburg's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.
What insurance does Marian Greenburg accept?
Health plans from Anthem Blue Cross and Blue Shield, HealthPartners, Sanford Health Plan and Security Health Plan list Marian Greenburg 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 Marian Greenburg affiliated with any hospitals?
According to CMS data, Marian Greenburg is affiliated with Marshfield Medical Center and Marshfield Medical Center - Neillsville.
When was this NPI record last updated?
The NPPES record for Marian Greenburg was last updated on July 8, 2007. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 19 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.
# Marian Greenburg, MD · NPI 1720198872
Internal Medicine physician in Marshfield, Wisconsin. Individual provider, active in the CMS NPPES registry since August 30, 2006.
## Identity
- **NPI:** 1720198872 (Entity type: Individual)
- **Enumerated:** August 30, 2006
- **Primary specialty:** Internal Medicine · taxonomy 207R00000X
- **State license:** 47376 (Wisconsin)
- **Sole proprietor:** Yes
## Practice location
- **Address:** 1000 N OAK AVE, Marshfield, WI 54449-5777
- **Phone:** (715) 389-3334
## 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): Marshfield Clinic Inc (NPI 1952347981, Marshfield, WI); Mchs Hospitals Inc (NPI 1093221434, Marshfield, WI) · CMS Revalidation Reassignment List, October 2026 release
- **Medical school:** Yale University School Of Medicine, class of 1987
## Record status
- **NPPES last updated:** July 8, 2007
- **Other identifiers:** Medicaid 34582400 (WI); Medicare UPIN E45080
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Source: [NPI Profile](https://npiprofile.com/npi/1720198872) · Data from the CMS NPPES public registry.