DR. MEGAN BRADLEY CALLAHAN M.D.
NPI 1881662864
Internal Medicine in Everett, MA
About Dr. Megan Bradley Callahan M.d. NPPES
Official registry information on file with the National Plan and Provider Enumeration System.
DR. MEGAN BRADLEY CALLAHAN M.D. (NPI 1881662864) is an individual internal medicine provider in Everett, Massachusetts, licensed in Massachusetts (229848) and active in the NPI registry since March 2006. She is enrolled in Medicare PECOS, is affiliated with Massachusetts General Hospital, and is a graduate of Other (1998).
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
Dr. Megan Bradley Callahan 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
9Medicare enrollment records show Megan Callahan reassigns Medicare billing to 9 organizations. Each organization bills Medicare for the services this provider delivers there; the nearest is listed first.
Cambridge, MA 02139
- Reassigned Medicare billing, Massachusetts enrollment
- 719 clinicians in this Medicare group
Boston, MA 02215
- Reassigned Medicare billing, Massachusetts enrollment
- 346 clinicians in this Medicare group
Boston, MA 02215
- Reassigned Medicare billing, Massachusetts enrollment
- 1,477 clinicians in this Medicare group
Boston, MA 02215
- Reassigned Medicare billing, Massachusetts enrollment
- 2,579 clinicians in this Medicare group
Salem, MA 01970
- Reassigned Medicare billing, Massachusetts enrollment
- 83 clinicians in this Medicare group
Salem, MA 01970
- Reassigned Medicare billing, Massachusetts enrollment
- 43 clinicians in this Medicare group
Salem, NH 03079
- Reassigned Medicare billing, Massachusetts enrollment
- 181 clinicians in this Medicare group
Hampstead, NH 03841
- Reassigned Medicare billing, New Hampshire enrollment
- 2,620 clinicians in this Medicare group
Keene, NH 03431
- Reassigned Medicare billing, New Hampshire enrollment
- 2,999 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 4
Hospitals where this provider delivers care, identified from recent Medicare claims and place-of-service records.
Massachusetts General Hospital
Acute Care Hospitals · Boston, MANewton-Wellesley Hospital
Acute Care Hospitals · Newton, MABrigham And Women's Hospital
Acute Care Hospitals · Boston, MAFaulkner Hospital-Brigham And Women's
Acute Care Hospitals · Boston, MAPhysician Visit Costs CMS claims · ZIP area
Typical Medicare office-visit costs in the 02149 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.
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 Megan Callahan's NPI number?
The NPI number for Megan Callahan is 1881662864. It was assigned to this individual provider in the NPPES registry on March 8, 2006.
Where is Megan Callahan located?
Megan Callahan practices at 103 Garland St, Everett, MA 02149. The listed phone number is (617) 394-7701.
What is Megan Callahan's specialty?
The primary specialty registered for this NPI is Internal Medicine with taxonomy code 207R00000X.
Is Megan Callahan enrolled in Medicare?
Yes. Megan 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 Megan Callahan's services?
According to the CMS Revalidation Reassignment List (October 2026 release), Megan Callahan reassigns Medicare benefits to 9 organizations: Cambridge Public Health Commission (Cambridge, MA), Associated Physicians Of Harvard Medical Faculty Physicians At Beth Is (Boston, MA), Beth Israel Deaconess Medical Center, Inc. (Boston, MA), Harvard Medical Faculty Phys At Beth Israel Deaconess Med Ctr Inc (Boston, MA), Charter Health PC (Salem, MA) and 4 more organizations, listed in the Medicare section above. 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 Megan Callahan's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.
What insurance does Megan Callahan accept?
Health plans from CareSource (Common Ground Healthcare) and Taro Health list Megan 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 Megan Callahan affiliated with any hospitals?
According to CMS data, Megan Callahan is affiliated with Massachusetts General Hospital, Newton-Wellesley Hospital, Brigham And Women's Hospital and Faulkner Hospital-Brigham And Women's.
When was this NPI record last updated?
The NPPES record for Megan Callahan was last updated on January 16, 2023. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 3 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.
# Dr. Megan Bradley Callahan, M.D. · NPI 1881662864
Internal Medicine physician in Everett, Massachusetts. Individual provider, active in the CMS NPPES registry since March 8, 2006.
## Identity
- **NPI:** 1881662864 (Entity type: Individual)
- **Enumerated:** March 8, 2006
- **Primary specialty:** Internal Medicine · taxonomy 207R00000X
- **State license:** 229848 (Massachusetts)
- **Sole proprietor:** No
## Practice location
- **Address:** 103 GARLAND ST, Everett, MA 02149-5066
- **Phone:** (617) 394-7701
## 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:** 9 organizations under Medicare reassignment (form CMS-855R): Cambridge Public Health Commission (NPI 1932313228, Cambridge, MA); Associated Physicians Of Harvard Medical Faculty Physicians At Beth Is (NPI 1497151773, Boston, MA); Beth Israel Deaconess Medical Center, Inc. (NPI 1548202641, Boston, MA); Harvard Medical Faculty Phys At Beth Israel Deaconess Med Ctr Inc (NPI 1194765438, Boston, MA); Charter Health PC (NPI 1750824124, Salem, MA); and 4 more · CMS Revalidation Reassignment List, October 2026 release
- **Medical school:** Other, class of 1998
## Record status
- **NPPES last updated:** January 16, 2023
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Source: [NPI Profile](https://npiprofile.com/npi/1881662864) · Data from the CMS NPPES public registry.