MARGARET O.P. FALLON MD
NPI 1780104968
Pediatrics in Waltham, MA
About Margaret O.p. Fallon Md NPPES
Official registry information on file with the National Plan and Provider Enumeration System.
MARGARET O.P. FALLON MD (NPI 1780104968) is an individual pediatrics provider in Waltham, Massachusetts, licensed in Massachusetts (271340) and active in the NPI registry since June 2017. She is enrolled in Medicare PECOS and is a graduate of Harvard Medical School (2017).
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
Margaret O.p. Fallon Md 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 Margaret Fallon reassigns Medicare billing to 2 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
Source: CMS Revalidation Reassignment List, October 2026 release. Reassignment records can lag staffing changes; confirm a current affiliation with the organization.
Physician Visit Costs CMS claims · ZIP area
Typical Medicare office-visit costs in the 02451 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 7
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 Margaret Fallon's NPI number?
The NPI number for Margaret Fallon is 1780104968. It was assigned to this individual provider in the NPPES registry on June 20, 2017.
Where is Margaret Fallon located?
Margaret Fallon practices at 52 Second Ave, Waltham, MA 02451. The listed phone number is (617) 726-2000.
What is Margaret Fallon's specialty?
The primary specialty registered for this NPI is Pediatrics with taxonomy code 208000000X.
Is Margaret Fallon enrolled in Medicare?
Yes. Margaret Fallon 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 Margaret Fallon's services?
According to the CMS Revalidation Reassignment List (October 2026 release), Margaret Fallon reassigns Medicare benefits to 2 organizations: Massachusetts General Physicians Organization Inc (Boston, MA) and The General Hospital Corporation (Boston, 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 Margaret Fallon's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.
What insurance does Margaret Fallon accept?
Health plans from Anthem Blue Cross and Blue Shield and Taro Health list Margaret Fallon 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.
When was this NPI record last updated?
The NPPES record for Margaret Fallon was last updated on April 21, 2025. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 18 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.
# Margaret O.p. Fallon, MD · NPI 1780104968
Pediatrics physician in Waltham, Massachusetts. Individual provider, active in the CMS NPPES registry since June 20, 2017.
## Identity
- **NPI:** 1780104968 (Entity type: Individual)
- **Enumerated:** June 20, 2017
- **Primary specialty:** Pediatrics · taxonomy 208000000X
- **State license:** 271340 (Massachusetts)
- **Sole proprietor:** No
## Practice location
- **Address:** 52 SECOND AVE, Waltham, MA 02451-1127
- **Phone:** (617) 726-2000
## 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): Massachusetts General Physicians Organization Inc (NPI 1801874573, Boston, MA); The General Hospital Corporation (NPI 1023049236, Boston, MA) · CMS Revalidation Reassignment List, October 2026 release
- **Medical school:** Harvard Medical School, class of 2017
## Record status
- **NPPES last updated:** April 21, 2025
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Source: [NPI Profile](https://npiprofile.com/npi/1780104968) · Data from the CMS NPPES public registry.