KATHRYN VIONA OAS AGNP
NPI 1184181380
Nurse Practitioner - Primary Care in Cambridge, MA
About Kathryn Viona Oas Agnp NPPES
Official registry information on file with the National Plan and Provider Enumeration System.
KATHRYN VIONA OAS AGNP (NPI 1184181380) is an individual primary care provider in Cambridge, Massachusetts, licensed in Massachusetts (RN2298520) and active in the NPI registry since February 2019. She is enrolled in Medicare PECOS, is affiliated with North Shore Medical Center -, and is a graduate of Other (2018).
NPPES Registry Identity
Specialties & Licenses
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
Kathryn Viona Oas Agnp 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 Kathryn Oas reassigns Medicare billing to 3 organizations. Each organization bills Medicare for the services this provider delivers there; the nearest is listed first.
Boston, MA 02114
- Reassigned Medicare billing, Massachusetts enrollment
- 6,360 clinicians in this Medicare group
Boston, MA 02114
- Reassigned Medicare billing, Massachusetts enrollment
- 6,234 clinicians in this Medicare group
Peabody, MA 01960
- Reassigned Medicare billing, Massachusetts enrollment
- 43 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
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.
North Shore Medical Center -
Acute Care Hospitals · Salem, MAPhysician Visit Costs CMS claims · ZIP area
Typical Medicare office-visit costs in the 02139 ZIP code area, from fee-for-service claims. These are area statistics, not this provider’s prices; actual charges vary by service and coverage.
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 Kathryn Oas's NPI number?
The NPI number for Kathryn Oas is 1184181380. It was assigned to this individual provider in the NPPES registry on February 23, 2019.
Where is Kathryn Oas located?
Kathryn Oas practices at 94 Hampshire St Unit A, Cambridge, MA 02139. The listed phone number is (801) 602-5524.
What is Kathryn Oas's specialty?
The primary specialty registered for this NPI is Nurse Practitioner, specializing in Primary Care, with taxonomy code 363LP2300X.
Is Kathryn Oas enrolled in Medicare?
Yes. Kathryn Oas 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 Kathryn Oas's services?
According to the CMS Revalidation Reassignment List (October 2026 release), Kathryn Oas reassigns Medicare benefits to 3 organizations: Massachusetts General Physicians Organization Inc (Boston, MA), The General Hospital Corporation (Boston, MA) and North Shore Community Health, Inc (Peabody, MA). 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 Kathryn Oas's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.
What insurance does Kathryn Oas accept?
Health plans from Anthem Blue Cross and Blue Shield list Kathryn Oas 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 Kathryn Oas affiliated with any hospitals?
According to CMS data, Kathryn Oas is affiliated with North Shore Medical Center -.
When was this NPI record last updated?
The NPPES record for Kathryn Oas was last updated on November 9, 2021. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 4 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.
# Kathryn Viona Oas, AGNP · NPI 1184181380
Primary Care physician in Cambridge, Massachusetts. Individual provider, active in the CMS NPPES registry since February 23, 2019.
## Identity
- **NPI:** 1184181380 (Entity type: Individual)
- **Enumerated:** February 23, 2019
- **Primary specialty:** Nurse Practitioner - Primary Care · taxonomy 363LP2300X
- **State license:** RN2298520 (Massachusetts)
- **Sole proprietor:** No
## Practice location
- **Address:** 94 HAMPSHIRE ST UNIT A, Cambridge, MA 02139-1504
- **Phone:** (801) 602-5524
## 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): Massachusetts General Physicians Organization Inc (NPI 1801874573, Boston, MA); The General Hospital Corporation (NPI 1023049236, Boston, MA); North Shore Community Health, Inc (NPI 1124373022, Peabody, MA) · CMS Revalidation Reassignment List, October 2026 release
- **Medical school:** Other, class of 2018
## Record status
- **NPPES last updated:** November 9, 2021
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Source: [NPI Profile](https://npiprofile.com/npi/1184181380) · Data from the CMS NPPES public registry.