MARY TWAROG
NPI 1699425207
Anesthesiology in Newton, MA
About Mary Twarog NPPES
Official registry information on file with the National Plan and Provider Enumeration System.
MARY TWAROG (NPI 1699425207) is an individual anesthesiology provider in Newton, Massachusetts, licensed in Massachusetts (1027399) and active in the NPI registry since March 2022. She is enrolled in Medicare PECOS, is affiliated with Newton-wellesley Hospital, and is a graduate of State University Of New York At Buffalo School Of Medicine (2022).
NPPES Registry Identity
Specialties & Licenses
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
Mary Twarog 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 Reassignment
Medicare enrollment records show Mary Twarog reassigns Medicare billing to 1 organization. The organization bills Medicare for the services this provider delivers there.
Newton, MA 02462
- Reassigned Medicare billing, Massachusetts enrollment
- 116 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.
Hospital Affiliations CMS Care Compare
Hospitals where this provider delivers care, identified from recent Medicare claims and place-of-service records.
Newton-Wellesley Hospital
Acute Care Hospitals · Newton, MAOther Providers at the Same Location NPPES 20
Providers registered at the same practice address, or within the immediate area, according to the NPPES registry.
NEWTON, MA 02462
NEWTON, MA 02462
NEWTON, MA 02462
NEWTON, MA 02462
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 Mary Twarog's NPI number?
The NPI number for Mary Twarog is 1699425207. It was assigned to this individual provider in the NPPES registry on March 25, 2022.
Where is Mary Twarog located?
Mary Twarog practices at 2014 Washington St, Newton, MA 02462. The listed phone number is (617) 243-6000.
What is Mary Twarog's specialty?
The primary specialty registered for this NPI is Anesthesiology with taxonomy code 207L00000X.
Is Mary Twarog enrolled in Medicare?
Yes. Mary Twarog 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 organization bills Medicare for Mary Twarog's services?
According to the CMS Revalidation Reassignment List (October 2026 release), Mary Twarog reassigns Medicare benefits to Commonwealth Anesthesia Associates, Inc (Newton, MA). The 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 Mary Twarog's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.
Is Mary Twarog affiliated with any hospitals?
According to CMS data, Mary Twarog is affiliated with Newton-Wellesley Hospital.
When was this NPI record last updated?
The NPPES record for Mary Twarog was last updated on July 31, 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.
# Mary Twarog · NPI 1699425207
Anesthesiology physician in Newton, Massachusetts. Individual provider, active in the CMS NPPES registry since March 25, 2022.
## Identity
- **NPI:** 1699425207 (Entity type: Individual)
- **Enumerated:** March 25, 2022
- **Primary specialty:** Anesthesiology · taxonomy 207L00000X
- **State license:** 1027399 (Massachusetts)
- **Sole proprietor:** No
## Practice location
- **Address:** 2014 WASHINGTON ST, Newton, MA 02462-1607
- **Phone:** (617) 243-6000
## 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:** Commonwealth Anesthesia Associates, Inc (NPI 1184645194, Newton, MA), under Medicare reassignment (form CMS-855R) · CMS Revalidation Reassignment List, October 2026 release
- **Medical school:** State University Of New York At Buffalo School Of Medicine, class of 2022
## Record status
- **NPPES last updated:** July 31, 2026
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Source: [NPI Profile](https://npiprofile.com/npi/1699425207) · Data from the CMS NPPES public registry.