Dr. Catherine Anne Riordan, MD
- Part D claims, 2021
- 12
- Industry payments
- $35
- Affiliated sites
- 1
- Medical group
- 1
- State license
- 1
- Practice address
- 421 Chandler St., Worcester, MA 01602
- Practice phone
- Call (508) 752-4511
- Professional email
- Get professional email
- Personal email
- Get personal email
- Mobile number
- Get mobile number
Primary practice
Chandler Pediatrics
Pediatric practice · Worcester, Massachusetts
Find Dr. Riordan's professional email, personal email and mobile number
Dmand AI checks each channel through healthcare-specific waterfall enrichment. See what is on file with a free account, with practice phones, licenses and affiliations.
Dr. Catherine Anne Riordan is a pediatrician in Worcester, Massachusetts
Dr. Riordan practices at Chandler Pediatrics in Worcester, Massachusetts.
Dr. Riordan's NPI, 1952305997, was assigned on June 8, 2005. Dr. Riordan holds Massachusetts license 80757.
- NPI
- 1952305997NPI Registry (opens in a new tab)
- NPI enumeration date
- June 8, 2005
- NPI status
- Active
- Practice phone
- (508) 752-4511
- Professional email
- Get email
- Personal email
- Get email
- Mobile number
- Get number
- Sex
- Female
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; and Dmand AI Affiliation Data
Dr. Catherine Anne Riordan practices at Chandler Pediatrics in Worcester, Massachusetts
Dr. Riordan's primary practice is Chandler Pediatrics, at 421 Chandler St., Worcester, MA 01602. The practice phone is (508) 752-4511.
- Chandler Pediatrics421 Chandler St., Worcester, MA 01602Phone(508) 752-4511
Source: Dmand AI Affiliation Data
Dr. Catherine Anne Riordan is affiliated with 1 site of care and 1 medical group
Dr. Riordan's primary practice is Chandler Pediatrics in Worcester, Massachusetts. Dmand AI also links Dr. Riordan to 1 medical group, named with a free account.
Source: Dmand AI Affiliation Data
Dmand AI tracks the EHR system at Dr. Catherine Anne Riordan's practice
Dmand AI tracks the electronic health record (EHR) system at each site where Dr. Riordan practices. Vendor and product names are available with a free account.
| Site | EHR vendor and product |
|---|---|
| Chandler Pediatrics | Available with a free account |
| +1 medical group | Available with a free account |
Source: Dmand AI Technology Install Data
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Dr. Catherine Anne Riordan is one of 2,101 pediatricians in Massachusetts
Pediatrics is Dr. Riordan's primary specialty in the NPI Registry, under taxonomy code 208000000X. Dr. Riordan is licensed in Massachusetts.
Specialties and state licenses
- Pediatrics, MassachusettsPrimary
Pediatricians near Dr. Riordan
Counts of pediatricians with a Dmand AI profile, by place and practice. Each opens the list.
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; and Dmand AI Peer Benchmarks
Dr. Catherine Anne Riordan's patients have a median age of 11
Across all payers, Dmand AI patient panel data puts Dr. Riordan's median patient age at 11, with 48% women.
Dr. Riordan's patients across all payers
Dmand AI patient panel data covers Medicare, Medicaid and commercial patients.
Patient panel by age, all payers
Median age 11
Patient panel by sex, all payers
- Women48%
- Men52%
Source: Dmand AI Patient Panel Data
Dr. Catherine Anne Riordan wrote 12 Medicare Part D claims in 2021
In 2021, Dr. Riordan wrote 12 Medicare Part D claims. Every claim was for a generic drug. They cover 1 drug, with $500 in total drug cost. In 2020, CMS named 12 claims across 1 drug.
Dr. Riordan's most prescribed drugs by claims, 2021
CMS names a drug when it has 11 or more claims. Share is of the claims for drugs CMS names.
Part D claims for drugs CMS names, 2020 to 2021
- 2020
- 2021
- Claims for drugs CMS names
- 2020: 122021: 12No change
Drugs named by CMS: 1 in 2021, 1 in 2020.
Source: Medicare Part D Prescribers - by Provider and Drug (CMS), 2024 data, released May 6, 2026
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Filter 7.4M+ HCPs by Medicare procedures, Part D drugs and Open Payments history, then reach them with verified contacts in one login.
Dr. Catherine Anne Riordan received $35 in industry payments from 2016 to 2023
CMS Open Payments shows 2 general payments to Dr. Riordan from 2 drug and device companies from 2016 to 2023. Food and beverage make up the largest share, 100% of the total. Pfizer Inc. paid the most, $24.
General payments to Dr. Riordan by program year, 2016 to 2023
Companies that paid Dr. Riordan the most, 2016 to 2023
Share is of all general payments to this clinician.
Source: Open Payments (CMS), 2025 data, released July 7, 2026
Sources for Dr. Catherine Anne Riordan's profile data
| Data on this page | Source |
|---|---|
| NPI, name, sex, specialty and licenses | NPPES NPI Registry (CMS) (opens in a new tab)Dmand AI Professional Profile Data |
| Practice locations and phone | Dmand AI Affiliation Data |
| Primary practice, affiliations and health system | Dmand AI Affiliation Data |
| Medicare patients and the all-payer patient panel | Dmand AI Patient Panel Data |
| Part D prescribing | Medicare Part D Prescribers - by Provider and Drug (CMS) (opens in a new tab) |
| Industry payments | Open Payments (CMS) (opens in a new tab) |
| EHR at each practice site | Dmand AI Technology Install Data |
| Similar physicians | Dmand AI Affiliation Data |
Data last refreshed October 2026Report an inaccuracyRemove my information
FAQ
Frequently asked questions about Dr. Catherine Anne Riordan
Spotted something out of date? Email hello@dmand.ai and we will check the record. Contact details live in the free trial.
What is Dr. Catherine Anne Riordan's NPI number?
Dr. Catherine Anne Riordan's NPI number is 1952305997. It was assigned on June 8, 2005, and it is active in the NPI Registry.
What kind of doctor is Dr. Catherine Anne Riordan?
Dr. Catherine Anne Riordan is a pediatrician in Worcester, Massachusetts. The primary specialty in the NPI Registry is Pediatrics Physician (taxonomy code 208000000X).
Where does Dr. Catherine Anne Riordan practice?
Dr. Riordan practices at 421 Chandler St., Worcester, MA 01602. Dr. Riordan's primary practice is Chandler Pediatrics in Worcester, Massachusetts. Dmand AI also links Dr. Riordan to 1 medical group.
What is Dr. Catherine Anne Riordan's office phone number?
The practice phone on file for Dr. Riordan is (508) 752-4511.
What is Dr. Catherine Anne Riordan's medical license number?
Dr. Riordan holds Massachusetts license 80757.
What drugs does Dr. Catherine Anne Riordan prescribe most?
In 2021 Medicare Part D data, Dr. Riordan's most prescribed drugs by claims were Norethindrone Acetate.
Has Dr. Catherine Anne Riordan received payments from drug or device companies?
CMS Open Payments shows $35 in general payments to Dr. Riordan from 2 companies from 2016 to 2023. The largest total came from Pfizer Inc.
How long has Dr. Catherine Anne Riordan been practicing?
Dr. Riordan's NPI was assigned in 2005.
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