SIMA SHARMA TIWARI
NPI 1043904055
Nurse Anesthetist, Certified Registered in Worcester, MA
About Sima Sharma Tiwari NPPES
Official registry information on file with the National Plan and Provider Enumeration System.
SIMA SHARMA TIWARI (NPI 1043904055) is an individual nurse anesthetist, certified registered in Worcester, Massachusetts, licensed in Massachusetts (RN2304583) and active in the NPI registry since June 2023. She is affiliated with Newton-wellesley Hospital and is a graduate of Other (2024).
NPPES Registry Identity
Specialties & Licenses 2
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
Sima Sharma Tiwari 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 Sima Sharma Tiwari reassigns Medicare billing to 3 organizations. Each organization bills Medicare for the services this provider delivers there; the nearest is listed first.
Worcester, MA 01655
- Reassigned Medicare billing, Massachusetts enrollment
- 2,902 clinicians in this Medicare group
Worcester, MA 01605
- Reassigned Medicare billing, Massachusetts enrollment
- 57 clinicians in this Medicare group
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 2
Hospitals where this provider delivers care, identified from recent Medicare claims and place-of-service records.
Newton-Wellesley Hospital
Acute Care Hospitals · Newton, MAUmass Memorial Medical Center/University Campus
Acute Care Hospitals · Worcester, MAPhysician Visit Costs CMS claims · ZIP area
Typical Medicare office-visit costs in the 01655 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.
WORCESTER, MA 01655
WORCESTER, MA 01655
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 Sima Sharma Tiwari's NPI number?
The NPI number for Sima Sharma Tiwari is 1043904055. It was assigned to this individual provider in the NPPES registry on June 5, 2023.
Where is Sima Sharma Tiwari located?
Sima Sharma Tiwari practices at 55 Lake Ave N, Worcester, MA 01655. The listed phone number is (508) 856-3271.
What is Sima Sharma Tiwari's specialty?
The primary specialty registered for this NPI is Nurse Anesthetist, Certified Registered with taxonomy code 367500000X.
Is Sima Sharma Tiwari enrolled in Medicare?
Yes. Sima Sharma Tiwari 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 Sima Sharma Tiwari's services?
According to the CMS Revalidation Reassignment List (October 2026 release), Sima Sharma Tiwari reassigns Medicare benefits to 3 organizations: Umass Memorial Medical Group Inc (Worcester, MA), Tri Anesthesia LLC (Worcester, MA) and Commonwealth Anesthesia Associates, Inc (Newton, 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 Sima Sharma Tiwari's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.
Is Sima Sharma Tiwari affiliated with any hospitals?
According to CMS data, Sima Sharma Tiwari is affiliated with Newton-Wellesley Hospital and Umass Memorial Medical Center/University Campus.
When was this NPI record last updated?
The NPPES record for Sima Sharma Tiwari was last updated on September 13, 2024. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 2 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.
# Sima Sharma Tiwari · NPI 1043904055
Nurse Anesthetist, Certified Registered physician in Worcester, Massachusetts. Individual provider, active in the CMS NPPES registry since June 5, 2023.
## Identity
- **NPI:** 1043904055 (Entity type: Individual)
- **Enumerated:** June 5, 2023
- **Primary specialty:** Nurse Anesthetist, Certified Registered · taxonomy 367500000X
- **State license:** RN2304583 (Massachusetts)
- **Sole proprietor:** No
## Practice location
- **Address:** 55 LAKE AVE N, Worcester, MA 01655-0002
- **Phone:** (508) 856-3271 · **Fax:** (508) 856-5911
## Medicare
- **Medicare:** Enrolled (PECOS); accepts Medicare assignment
- **Bills Medicare through:** 3 organizations under Medicare reassignment (form CMS-855R): Umass Memorial Medical Group Inc (NPI 1760445373, Worcester, MA); Tri Anesthesia LLC (NPI 1275331761, Worcester, MA); Commonwealth Anesthesia Associates, Inc (NPI 1184645194, Newton, MA) · CMS Revalidation Reassignment List, October 2026 release
- **Medical school:** Other, class of 2024
## Record status
- **NPPES last updated:** September 13, 2024
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Source: [NPI Profile](https://npiprofile.com/npi/1043904055) · Data from the CMS NPPES public registry.