MARTA ONYSKIV M.D.
NPI 1619081510
Family Medicine in Boston, MA
About Marta Onyskiv M.d. NPPES
Official registry information on file with the National Plan and Provider Enumeration System.
MARTA ONYSKIV M.D. (NPI 1619081510) is an individual family medicine provider in Boston, Massachusetts, licensed in Massachusetts (226897) and active in the NPI registry since August 2006. She is enrolled in Medicare PECOS, is affiliated with Morton Hospital, and is a graduate of Other (1989).
NPPES Registry Identity
Specialties & Licenses
Other Identifiers 3
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
Marta Onyskiv 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 Marta Onyskiv reassigns Medicare billing to 2 organizations. Each organization bills Medicare for the services this provider delivers there; the nearest is listed first.
Watertown, MA 02472
- Reassigned Medicare billing, Massachusetts enrollment
- 1,103 clinicians in this Medicare group
Brockton, MA 02301
- Reassigned Medicare billing, Massachusetts enrollment
- 264 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 10
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 5
Hospitals where this provider delivers care, identified from recent Medicare claims and place-of-service records.
Morton Hospital
Acute Care Hospitals · Taunton, MABeth Israel Deaconess Hospital - Needham
Acute Care Hospitals · Needham, MABrigham And Women's Hospital
Acute Care Hospitals · Boston, MAGood Samaritan Medical Center
Acute Care Hospitals · Brockton, MAFaulkner Hospital-Brigham And Women's
Acute Care Hospitals · Boston, MAPhysician Visit Costs CMS claims · ZIP area
Typical Medicare office-visit costs in the 02111 ZIP code area, from fee-for-service claims. These are area statistics, not this provider’s prices; actual charges vary by service and coverage.
Referred Medical Equipment & Supplies CMS DME claims
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.
CINCINNATI, MA 02111
BOSTON, MA 02111
BOSTON, MA 02111
BOSTON, MA 02111
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 Marta Onyskiv's NPI number?
The NPI number for Marta Onyskiv is 1619081510. It was assigned to this individual provider in the NPPES registry on August 18, 2006.
Where is Marta Onyskiv located?
Marta Onyskiv practices at 800 Washington Street Box 1013, Boston, MA 02111. The listed phone number is (617) 636-5000.
What is Marta Onyskiv's specialty?
The primary specialty registered for this NPI is Family Medicine with taxonomy code 207Q00000X.
Is Marta Onyskiv enrolled in Medicare?
Yes. Marta Onyskiv 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 Marta Onyskiv's services?
According to the CMS Revalidation Reassignment List (October 2026 release), Marta Onyskiv reassigns Medicare benefits to 2 organizations: Steward Medical Group, Inc (Watertown, MA) and Revere Medical Of Massachusetts, PC (Brockton, 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 Marta Onyskiv's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.
What insurance does Marta Onyskiv accept?
Health plans from Anthem Blue Cross and Blue Shield and Taro Health list Marta Onyskiv 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 Marta Onyskiv affiliated with any hospitals?
According to CMS data, Marta Onyskiv is affiliated with Morton Hospital, Beth Israel Deaconess Hospital - Needham, Brigham And Women's Hospital, Good Samaritan Medical Center and Faulkner Hospital-Brigham And Women's.
When was this NPI record last updated?
The NPPES record for Marta Onyskiv was last updated on September 4, 2013. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 13 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.
# Marta Onyskiv, M.D. · NPI 1619081510
Family Medicine physician in Boston, Massachusetts. Individual provider, active in the CMS NPPES registry since August 18, 2006.
## Identity
- **NPI:** 1619081510 (Entity type: Individual)
- **Enumerated:** August 18, 2006
- **Primary specialty:** Family Medicine · taxonomy 207Q00000X
- **State license:** 226897 (Massachusetts)
- **Sole proprietor:** No
## Practice location
- **Address:** 800 WASHINGTON STREET, BOX 1013, Boston, MA 02111
- **Phone:** (617) 636-5000
## 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): Steward Medical Group, Inc (NPI 1629398219, Watertown, MA); Revere Medical Of Massachusetts, PC (NPI 1336976539, Brockton, MA) · CMS Revalidation Reassignment List, October 2026 release
- **Medical school:** Other, class of 1989
## Record status
- **NPPES last updated:** September 4, 2013
- **Other identifiers:** Medicare UPIN I57497; Medicaid 110074033A (MA); Medicare PIN A40156 (MA)
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Source: [NPI Profile](https://npiprofile.com/npi/1619081510) · Data from the CMS NPPES public registry.