JOHN FRANCIS KEANEY III
NPI 1598384844
Internal Medicine in Boston, MA
About John Francis Keaney Iii NPPES
Official registry information on file with the National Plan and Provider Enumeration System.
JOHN FRANCIS KEANEY III (NPI 1598384844) is an individual internal medicine provider in Boston, Massachusetts, licensed in Massachusetts (1023073) and active in the NPI registry since April 2020. He is enrolled in Medicare PECOS and is a graduate of Yale University School Of Medicine (2020).
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
John Francis Keaney Iii 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 John Keaney reassigns Medicare billing to 2 organizations. Each organization bills Medicare for the services this provider delivers there; the nearest is listed first.
Boston, MA 02109
- Reassigned Medicare billing, Massachusetts enrollment
- 350 clinicians in this Medicare group
Manhasset, NY 11030
- Reassigned Medicare billing, New York enrollment
- 99 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 02118 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 3
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 John Keaney's NPI number?
The NPI number for John Keaney is 1598384844. It was assigned to this individual provider in the NPPES registry on April 15, 2020.
Where is John Keaney located?
John Keaney practices at 394 Harrison Ave, Boston, MA 02118. The listed phone number is (617) 903-5000.
What is John Keaney's specialty?
The primary specialty registered for this NPI is Internal Medicine with taxonomy code 207R00000X.
Is John Keaney enrolled in Medicare?
Yes. John Keaney 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 John Keaney's services?
According to the CMS Revalidation Reassignment List (October 2026 release), John Keaney reassigns Medicare benefits to 2 organizations: Mass General Brigham Community Physicians Inc. (Boston, MA) and Mount Sinai School Of Medicine (Manhasset, NY). 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 John Keaney's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.
What insurance does John Keaney accept?
Health plans from Anthem Blue Cross and Blue Shield and Taro Health list John Keaney 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 John Keaney was last updated on January 6, 2026. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 9 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.
# John Francis Keaney III · NPI 1598384844
Internal Medicine physician in Boston, Massachusetts. Individual provider, active in the CMS NPPES registry since April 15, 2020.
## Identity
- **NPI:** 1598384844 (Entity type: Individual)
- **Enumerated:** April 15, 2020
- **Primary specialty:** Internal Medicine · taxonomy 207R00000X
- **State license:** 1023073 (Massachusetts)
- **Sole proprietor:** No
## Practice location
- **Address:** 394 HARRISON AVE, Boston, MA 02118-2212
- **Phone:** (617) 903-5000
## 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): Mass General Brigham Community Physicians Inc. (NPI 1265094122, Boston, MA); Mount Sinai School Of Medicine (NPI 1144659749, Manhasset, NY) · CMS Revalidation Reassignment List, October 2026 release
- **Medical school:** Yale University School Of Medicine, class of 2020
## Record status
- **NPPES last updated:** January 6, 2026
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Source: [NPI Profile](https://npiprofile.com/npi/1598384844) · Data from the CMS NPPES public registry.