Catherine Riordan, MD
NPI 1952305997 · Pediatrics Physician · Worcester, MA
Enrolled with Medicare as Order and Referring Only - Pediatric Medicine · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Catherine Riordan, MD is a Pediatrics Physician provider in Worcester, MA (NPI 1952305997).
Provider details
- NPI number
- 1952305997
- Entity type
- Individual
- Primary specialty
- Pediatrics PhysicianAllopathic & Osteopathic Physicians
- Credential
- MD
- Sex
- Female
- License
- 80757 (MA)
Specialties & taxonomies
Allopathic & Osteopathic Physicians
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure38% of score
21 yrs in NPPES registry
- Profile completeness38% of score
100% of core fields populated
- Practice footprint23% of score
1 documented practice location
Signals a provider has no public data for (e.g. Medicare claims) are left out of the score entirely — never counted as zero — so providers without that data are not penalized. See the full formula and weights in our methodology.
Practice location
Mailing address
Registry dates
- Enumerated
- 2005-06-08
- Last updated
- 2007-07-08
Frequently asked questions
- What is Catherine Riordan's NPI number?
- Catherine Riordan's National Provider Identifier (NPI) is 1952305997, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Catherine Riordan's specialty?
- Catherine Riordan is listed in the NPPES registry with a primary specialty of Pediatrics Physician (Allopathic & Osteopathic Physicians).
- Where is Catherine Riordan located?
- Catherine Riordan's practice location on file with NPPES is 421 Chandler St, Worcester, MA 01602-2915.
- What is Catherine Riordan's phone number?
- The practice phone number listed in the NPPES registry for Catherine Riordan is (508) 752-4511.
- Does Catherine Riordan accept Medicare?
- Catherine Riordan is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Catherine Riordan's NPI active?
- Yes — Catherine Riordan's NPI (1952305997) is active in the NPPES registry as of the last update on 2007-07-08.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.