MS. SARA ASTARITA CALLAHAN FNP
NPI 1942722533
Nurse Practitioner - Family in Charlestown, MA
About Ms. Sara Astarita Callahan Fnp NPPES
Official registry information on file with the National Plan and Provider Enumeration System.
MS. SARA ASTARITA CALLAHAN FNP (NPI 1942722533) is an individual family provider in Charlestown, Massachusetts, licensed in Massachusetts (2282855) and active in the NPI registry since July 2017. She is enrolled in Medicare PECOS, is affiliated with North Shore Medical Center -, and is a graduate of Other (2017).
NPPES Registry Identity
Specialties & Licenses 2
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
Ms. Sara Astarita Callahan Fnp 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 Sara Callahan 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
Salem, MA 01970
- Reassigned Medicare billing, Massachusetts enrollment
- 994 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 3
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 4
Hospitals where this provider delivers care, identified from recent Medicare claims and place-of-service records.
North Shore Medical Center -
Acute Care Hospitals · Salem, MAMassachusetts General Hospital
Acute Care Hospitals · Boston, MABrigham And Women's Hospital
Acute Care Hospitals · Boston, MAWentworth-Douglass Hospital
Acute Care Hospitals · Dover, NHPhysician Visit Costs CMS claims · ZIP area
Typical Medicare office-visit costs in the 02129 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.
CHARLESTOWN, MA 02129
CHARLESTOWN, MA 02129
CHARLESTOWN, MA 02129
CHARLESTOWN, MA 02129
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 Sara Callahan's NPI number?
The NPI number for Sara Callahan is 1942722533. It was assigned to this individual provider in the NPPES registry on July 14, 2017.
Where is Sara Callahan located?
Sara Callahan practices at 73 High St, Charlestown, MA 02129. The listed phone number is (617) 724-8135.
What is Sara Callahan's specialty?
The primary specialty registered for this NPI is Nurse Practitioner, specializing in Family, with taxonomy code 363LF0000X.
Is Sara Callahan enrolled in Medicare?
Yes. Sara Callahan 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 Sara Callahan's services?
According to the CMS Revalidation Reassignment List (October 2026 release), Sara Callahan reassigns Medicare benefits to 3 organizations: Massachusetts General Physicians Organization Inc (Boston, MA), The General Hospital Corporation (Boston, MA) and Mass General Brigham Medical Group Northern Massachusetts Inc (Salem, 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 Sara Callahan's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.
What insurance does Sara Callahan accept?
Health plans from Anthem Blue Cross and Blue Shield list Sara Callahan 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 Sara Callahan affiliated with any hospitals?
According to CMS data, Sara Callahan is affiliated with North Shore Medical Center -, Massachusetts General Hospital, Brigham And Women's Hospital and Wentworth-Douglass Hospital.
When was this NPI record last updated?
The NPPES record for Sara Callahan was last updated on April 1, 2019. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 7 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.
# Ms. Sara Astarita Callahan, FNP · NPI 1942722533
Family physician in Charlestown, Massachusetts. Individual provider, active in the CMS NPPES registry since July 14, 2017.
## Identity
- **NPI:** 1942722533 (Entity type: Individual)
- **Enumerated:** July 14, 2017
- **Primary specialty:** Nurse Practitioner - Family · taxonomy 363LF0000X
- **State license:** 2282855 (Massachusetts)
- **Sole proprietor:** No
## Practice location
- **Address:** 73 HIGH ST, Charlestown, MA 02129-3026
- **Phone:** (617) 724-8135
## 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); Mass General Brigham Medical Group Northern Massachusetts Inc (NPI 1588606123, Salem, MA) · CMS Revalidation Reassignment List, October 2026 release
- **Medical school:** Other, class of 2017
## Record status
- **NPPES last updated:** April 1, 2019
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Source: [NPI Profile](https://npiprofile.com/npi/1942722533) · Data from the CMS NPPES public registry.