DR. KATHERINE ANN MASS MD
NPI 1437787801
Obstetrics & Gynecology in Virginia, MN
About Dr. Katherine Ann Mass Md NPPES
Official registry information on file with the National Plan and Provider Enumeration System.
DR. KATHERINE ANN MASS MD (NPI 1437787801) is an individual obstetrics & gynecology provider in Virginia, Minnesota, licensed in Minnesota (82368) and active in the NPI registry since March 2020. She is enrolled in Medicare PECOS, is affiliated with Essentia Health Virginia, and is a graduate of Other (2020).
NPPES Registry Identity
Specialties & Licenses
Medicare Participation & PECOS CMS
Medicare enrollment, assignment, and ordering and referring status from the CMS PECOS system.
Medicare Enrollment Status
Enrolled in Medicare and accepts Medicare assignment
Dr. Katherine Ann Mass 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.
Hospital Affiliations CMS Care Compare
Hospitals where this provider delivers care, identified from recent Medicare claims and place-of-service records.
Essentia Health Virginia
Acute Care Hospitals · Virginia, MNPhysician Visit Costs CMS claims · ZIP area
Typical Medicare office-visit costs in the 55792 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.
VIRGINIA, MN 55792
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 Katherine Mass's NPI number?
The NPI number for Katherine Mass is 1437787801. It was assigned to this individual provider in the NPPES registry on March 31, 2020.
Where is Katherine Mass located?
Katherine Mass practices at 1101 9th St N, Virginia, MN 55792. The listed phone number is (218) 305-0000.
What is Katherine Mass's specialty?
The primary specialty registered for this NPI is Obstetrics & Gynecology with taxonomy code 207V00000X.
Is Katherine Mass enrolled in Medicare?
Yes. Katherine Mass 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.
Is Katherine Mass affiliated with any hospitals?
According to CMS data, Katherine Mass is affiliated with Essentia Health Virginia.
When was this NPI record last updated?
The NPPES record for Katherine Mass was last updated on April 23, 2026. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 3 months 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.
# Dr. Katherine Ann Mass, MD · NPI 1437787801
Obstetrics & Gynecology physician in Virginia, Minnesota. Individual provider, active in the CMS NPPES registry since March 31, 2020.
## Identity
- **NPI:** 1437787801 (Entity type: Individual)
- **Enumerated:** March 31, 2020
- **Primary specialty:** Obstetrics & Gynecology · taxonomy 207V00000X
- **State license:** 82368 (Minnesota)
- **Sole proprietor:** No
## Practice location
- **Address:** 1101 9TH ST N, Virginia, MN 55792-2329
- **Phone:** (218) 305-0000
## Medicare
- **Medicare:** Enrolled (PECOS); accepts Medicare assignment
- **Ordering & referring:** eligible for Part B labs & imaging, durable medical equipment, home health, power mobility devices
- **Medical school:** Other, class of 2020
## Record status
- **NPPES last updated:** April 23, 2026
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Source: [NPI Profile](https://npiprofile.com/npi/1437787801) · Data from the CMS NPPES public registry.