DR. KATHERINE P RYAN MD
NPI 1548765852
Emergency Medicine - Pediatric Emergency Medicine in Boston, MA
About Dr. Katherine P Ryan Md NPPES
Official registry information on file with the National Plan and Provider Enumeration System.
DR. KATHERINE P RYAN MD (NPI 1548765852) is an individual pediatric emergency medicine provider in Boston, Massachusetts, licensed in Massachusetts (1023422) and active in the NPI registry since March 2018. She is enrolled in Medicare PECOS.
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 (PECOS)
Dr. Katherine P Ryan Md is registered in the CMS Provider Enrollment, Chain and Ownership System (PECOS).
Medicare Billing Reassignment
Medicare enrollment records show Katherine Ryan reassigns Medicare billing to 1 organization. The organization bills Medicare for the services this provider delivers there.
Boston, MA 02115
- Reassigned Medicare billing, Massachusetts enrollment
- 1,358 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 02115 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 02115
BOSTON, MA 02115
BOSTON, MA 02115
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 Katherine Ryan's NPI number?
The NPI number for Katherine Ryan is 1548765852. It was assigned to this individual provider in the NPPES registry on March 28, 2018.
Where is Katherine Ryan located?
Katherine Ryan practices at 300 Longwood Ave, Boston, MA 02115. The listed phone number is (617) 355-6000.
What is Katherine Ryan's specialty?
The primary specialty registered for this NPI is Emergency Medicine, specializing in Pediatric Emergency Medicine, with taxonomy code 207PP0204X.
Is Katherine Ryan enrolled in Medicare?
Yes. Katherine Ryan is registered in the Medicare PECOS enrollment system.
Which organization bills Medicare for Katherine Ryan's services?
According to the CMS Revalidation Reassignment List (October 2026 release), Katherine Ryan reassigns Medicare benefits to Children's Hospital Pediatric Associates, Inc (Boston, 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 Katherine Ryan's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.
What insurance does Katherine Ryan accept?
Health plans from Taro Health list Katherine Ryan 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 Katherine Ryan was last updated on August 18, 2025. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 14 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. Katherine P Ryan, MD · NPI 1548765852
Pediatric Emergency Medicine physician in Boston, Massachusetts. Individual provider, active in the CMS NPPES registry since March 28, 2018.
## Identity
- **NPI:** 1548765852 (Entity type: Individual)
- **Enumerated:** March 28, 2018
- **Primary specialty:** Emergency Medicine - Pediatric Emergency Medicine · taxonomy 207PP0204X
- **State license:** 1023422 (Massachusetts)
- **Sole proprietor:** Yes
## Practice location
- **Address:** 300 LONGWOOD AVE, Boston, MA 02115-5724
- **Phone:** (617) 355-6000
## 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:** Children's Hospital Pediatric Associates, Inc (NPI 1457306664, Boston, MA), under Medicare reassignment (form CMS-855R) · CMS Revalidation Reassignment List, October 2026 release
## Record status
- **NPPES last updated:** August 18, 2025
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Source: [NPI Profile](https://npiprofile.com/npi/1548765852) · Data from the CMS NPPES public registry.