DR. THOMAS JAMES HAGAN D.C.
NPI 1245237569
Chiropractor in Cambridge, MA
About Dr. Thomas James Hagan D.c. NPPES
Official registry information on file with the National Plan and Provider Enumeration System.
DR. THOMAS JAMES HAGAN D.C. (NPI 1245237569) is an individual chiropractor in Cambridge, Massachusetts, licensed in Massachusetts (2866) and active in the NPI registry since July 2005. He is a graduate of New York Chiropractic College (2003).
NPPES Registry Identity
Specialties & Licenses
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. Thomas James Hagan D.c. 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 Reassignment
Medicare enrollment records show Thomas Hagan reassigns Medicare billing to 1 organization. The organization bills Medicare for the services this provider delivers there.
Cambridge, MA 02138
- Reassigned Medicare billing, Massachusetts enrollment
- 7 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
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.
Other Providers at the Same Location NPPES 9
Providers registered at the same practice address, or within the immediate area, according to the NPPES registry.
CAMBRIDGE, MA 02138
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 Thomas Hagan's NPI number?
The NPI number for Thomas Hagan is 1245237569. It was assigned to this individual provider in the NPPES registry on July 1, 2005.
Where is Thomas Hagan located?
Thomas Hagan practices at 1718 Massachusetts Ave, Cambridge, MA 02138. The listed phone number is (617) 492-5438.
What is Thomas Hagan's specialty?
The primary specialty registered for this NPI is Chiropractor with taxonomy code 111N00000X.
Is Thomas Hagan enrolled in Medicare?
Yes. Thomas Hagan 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 organization bills Medicare for Thomas Hagan's services?
According to the CMS Revalidation Reassignment List (October 2026 release), Thomas Hagan reassigns Medicare benefits to Khalsa Chiropractic Office P.C. (Cambridge, MA). The 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 Thomas Hagan's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.
When was this NPI record last updated?
The NPPES record for Thomas Hagan was last updated on July 13, 2026. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 3 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.
# Dr. Thomas James Hagan, D.C. · NPI 1245237569
Chiropractor provider in Cambridge, Massachusetts. Individual provider, active in the CMS NPPES registry since July 1, 2005.
## Identity
- **NPI:** 1245237569 (Entity type: Individual)
- **Enumerated:** July 1, 2005
- **Primary specialty:** Chiropractor · taxonomy 111N00000X
- **State license:** 2866 (Massachusetts)
- **Sole proprietor:** No
## Practice location
- **Address:** 1718 MASSACHUSETTS AVE, Cambridge, MA 02138-1804
- **Phone:** (617) 492-5438 · **Fax:** (617) 868-4611
## Medicare
- **Medicare:** Enrolled (PECOS); accepts Medicare assignment
- **Bills Medicare through:** Khalsa Chiropractic Office P.C. (NPI 1952430589, Cambridge, MA), under Medicare reassignment (form CMS-855R) · CMS Revalidation Reassignment List, October 2026 release
- **Medical school:** New York Chiropractic College, class of 2003
## Record status
- **NPPES last updated:** July 13, 2026
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Source: [NPI Profile](https://npiprofile.com/npi/1245237569) · Data from the CMS NPPES public registry.