DR. RYAN THOMAS CALLAHAN DPM
NPI 1265010284
Podiatrist in Boston, MA
About Dr. Ryan Thomas Callahan Dpm NPPES
Official registry information on file with the National Plan and Provider Enumeration System.
DR. RYAN THOMAS CALLAHAN DPM (NPI 1265010284) is an individual podiatrist in Boston, Massachusetts, licensed in California (E6042) and active in the NPI registry since March 2021. He is enrolled in Medicare PECOS.
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 (PECOS)
Dr. Ryan Thomas Callahan Dpm is registered in the CMS Provider Enrollment, Chain and Ownership System (PECOS).
Medicare Billing Reassignments
4Medicare enrollment records show Ryan Callahan reassigns Medicare billing to 4 organizations. Each organization bills Medicare for the services this provider delivers there; the nearest is listed first.
San Francisco, CA 94110
- Reassigned Medicare billing, California enrollment
- 81 clinicians in this Medicare group
San Francisco, CA 94143
- Reassigned Medicare billing, California enrollment
- 5,645 clinicians in this Medicare group
San Francisco, CA 94122
- Reassigned Medicare billing, California enrollment
- 5,544 clinicians in this Medicare group
San Francisco, CA 94143
- Reassigned Medicare billing, California enrollment
- 761 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 02130 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.
BOSTON, MA 02130
BOSTON, MA 02130
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 Ryan Callahan's NPI number?
The NPI number for Ryan Callahan is 1265010284. It was assigned to this individual provider in the NPPES registry on March 31, 2021.
Where is Ryan Callahan located?
Ryan Callahan practices at 150 S Huntington Ave, Boston, MA 02130. The listed phone number is (857) 364-4802.
What is Ryan Callahan's specialty?
The primary specialty registered for this NPI is Podiatrist with taxonomy code 213E00000X.
Is Ryan Callahan enrolled in Medicare?
Yes. Ryan Callahan is registered in the Medicare PECOS enrollment system.
Which organizations bill Medicare for Ryan Callahan's services?
According to the CMS Revalidation Reassignment List (October 2026 release), Ryan Callahan reassigns Medicare benefits to 4 organizations: University Of California Sfgh Medical Group (San Francisco, CA), University Of California San Francisco (San Francisco, CA), Ucsf Medical Group Business Services (San Francisco, CA) and Ucsf Dept Of Surgery (San Francisco, CA). 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 Ryan Callahan'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 Ryan Callahan was last updated on February 12, 2026. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 8 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. Ryan Thomas Callahan, DPM · NPI 1265010284
Podiatrist provider in Boston, Massachusetts. Individual provider, active in the CMS NPPES registry since March 31, 2021.
## Identity
- **NPI:** 1265010284 (Entity type: Individual)
- **Enumerated:** March 31, 2021
- **Primary specialty:** Podiatrist · taxonomy 213E00000X
- **State license:** E6042 (California)
- **Sole proprietor:** No
## Practice location
- **Address:** 150 S HUNTINGTON AVE, Boston, MA 02130-4817
- **Phone:** (857) 364-4802
## Medicare
- **Medicare:** Enrolled in Medicare (PECOS)
- **Ordering & referring:** eligible for Part B labs & imaging, durable medical equipment, home health, power mobility devices
- **Bills Medicare through:** 4 organizations under Medicare reassignment (form CMS-855R): University Of California Sfgh Medical Group (NPI 1700057908, San Francisco, CA); University Of California San Francisco (NPI 1346329380, San Francisco, CA); Ucsf Medical Group Business Services (NPI 1477624104, San Francisco, CA); Ucsf Dept Of Surgery (NPI 1477627537, San Francisco, CA) · CMS Revalidation Reassignment List, October 2026 release
## Record status
- **NPPES last updated:** February 12, 2026
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Source: [NPI Profile](https://npiprofile.com/npi/1265010284) · Data from the CMS NPPES public registry.