Eur J Anaesthesiol
Airway ExtubationAnesthesia, GeneralOperating Rooms
Dr. Isabella Rossi Riordan, MD
NPI1245644525PAC ID5991925349
- Medicare services, 2024
- 17
- Medicare patients, 2024
- 37
- Part D claims, 2017
- 29
- Publications
- 1
- MIPS score, 2024
- 84
- Practice address
- 2 Progress Point Pkwy, O Fallon, MO 63368
- Practice phone
- Call (636) 344-2273
- Professional email
- Get professional email
- Personal email
- Get personal email
- Mobile number
- Get mobile number
Primary practice
Find Dr. Riordan's professional email, personal email and mobile number
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Dr. Isabella Rossi Riordan is an anesthesiologist in O Fallon, Missouri
Dr. Riordan practices at Progress West Hospital in O Fallon, Missouri, part of BJC Health.
Dr. Riordan's NPI, 1245644525, was assigned on June 16, 2014. Dr. Riordan graduated from Loyola University of Chicago, Stritch School of Medicine in 2014. Dr. Riordan holds Missouri license 2016042732.
NPI and contact details
- NPI
- 1245644525NPI Registry (opens in a new tab)
- Medicare PAC ID
- 5991925349
- NPI enumeration date
- June 16, 2014
- NPI status
- Active
- Accepts Medicare assignment
- Yes
- Practice phone
- (636) 344-2273
- Professional email
- Get email
- Personal email
- Get email
- Mobile number
- Get number
- Sex
- Female
- Estimated age
- 38
- Medical school graduation
- 2014
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; Dmand AI Affiliation Data; and Doctors and Clinicians National Downloadable File (CMS)
Dr. Isabella Rossi Riordan practices at Progress West Hospital in O Fallon, Missouri
Dr. Riordan's primary practice is Progress West Hospital, at 2 Progress Point Pkwy, O Fallon, MO 63368 in St. Charles County. The practice phone is (636) 344-2273.
- Progress West Hospital2 Progress Point Pkwy, O Fallon, MO 63368 · St. Charles CountyPhone(636) 344-2273
Source: Dmand AI Affiliation Data
Dr. Isabella Rossi Riordan is affiliated with 1 site of care and 1 medical group
Dr. Riordan's primary practice is Progress West Hospital in O Fallon, Missouri, part of BJC Health. The medical group on file is WashU Medicine Psychiatry.
Sources: Dmand AI Affiliation Data; and Dmand AI Org Hierarchy Data
Dmand AI tracks the EHR system at Dr. Isabella Rossi 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 |
|---|---|
| Progress West Hospital | Available with a free account |
Source: Dmand AI Technology Install Data
For health IT teams
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Dr. Isabella Rossi Riordan is one of 819 anesthesiologists in Missouri
Anesthesiology is Dr. Riordan's primary specialty in the NPI Registry, under taxonomy code 207L00000X. Dr. Riordan is licensed in Missouri.
Specialties and state licenses
- Anesthesiology, MissouriPrimary
Anesthesiologists near Dr. Riordan
Counts of anesthesiologists with a Dmand AI profile, by place and practice. Each opens the list.
819anesthesiologists in Missouri
6anesthesiologists in O Fallon
6anesthesiologists at Progress West HospitalSources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; and Dmand AI Peer Benchmarks
Dr. Isabella Rossi Riordan billed Medicare for 17 services in 2024
CMS data shows 17 Medicare services from Dr. Riordan across 1 procedure code in 2024, for 37 Medicare patients. Medicare paid $820 for them. Every service was in a facility, such as a hospital, rather than an office.
Medicare services, 202417
Medicare patients37
Paid by Medicare$820
Procedure codes1
Dr. Riordan's Medicare services by type, 2023 to 2024
- 2023
- 2024
- Surgery
- 2023: 212024: 1719%
Dr. Riordan compared with the Missouri median for anesthesiologists, 2024
- Dr. Riordan
- Missouri median
- Medicare services
- 17vs 7577% below
- Medicare patients
- 37vs 14074% below
- Part D claims
- 29vs 2232% above
Medians across 839 anesthesiologists in Missouri with Dmand AI profiles that report each measure.
Dr. Riordan's most billed Medicare procedure codes, 2024
CMS publishes codes billed for 11 or more Medicare patients. Each label is the code family; CPT descriptions are licensed by the AMA.
Need commercial claims for Dr. Riordan?
Medicare shows one payer. Book a meeting to get commercial claims data for Dr. Riordan and other anesthesiologists in Missouri.
Sources: Medicare Physician & Other Practitioners - by Provider and Service (CMS), 2024 data; and Dmand AI Peer Benchmarks
Dr. Isabella Rossi Riordan treated 37 Medicare patients in 2024, average age 75
CMS counts 37 Medicare patients who saw Dr. Riordan in 2024. The largest group is 65 to 74, with 18 patients. 75% of them have arthritis, and 75% have high blood pressure. Their average risk score is 1.19, where 1.00 is the Medicare average.
Across all payers, Dmand AI patient panel data puts Dr. Riordan's median patient age at 56, with 71% women.
Medicare patients, 202437
Average age75
Average risk score1.19
Dr. Riordan's Medicare patients by age, 2024
CMS leaves out age groups with fewer than 11 patients.
Dr. Riordan's Medicare patients by sex, 2024
- Women2054%
- Men1746%
Chronic conditions among Dr. Riordan's Medicare patients, 2024
- Arthritis75%
- High blood pressure75%
- High cholesterol75%
- Diabetes32%
- Ischemic heart disease32%
- Atrial fibrillation30%
- COPD30%
- Heart failure30%
Share of Medicare patients with each condition. A patient can have several.
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 56
Patient panel by sex, all payers
- Women71%
- Men29%
Sources: Dmand AI Patient Panel Data; and Medicare Physician & Other Practitioners - by Provider (CMS), 2024 data
Dr. Isabella Rossi Riordan wrote 29 Medicare Part D claims in 2017
In 2017, Dr. Riordan wrote 29 Medicare Part D claims. They cover 2 drugs, with $860 in total drug cost. In 2016, CMS named 65 claims across 4 drugs.
Part D claims, 201729
Drugs named by CMS2
Total drug cost$860
Dr. Riordan's most prescribed drugs by claims, 2017
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, 2016 to 2017
- 2016
- 2017
- Claims for drugs CMS names
- 2016: 652017: 2955%
Drugs named by CMS: 2 in 2017, 4 in 2016.
Source: Medicare Part D Prescribers - by Provider and Drug (CMS), 2024 data, released May 6, 2026
Dr. Isabella Rossi Riordan scored 84 out of 100 in Medicare's MIPS program for 2024
CMS publishes a Merit-based Incentive Payment System (MIPS) score of 84 out of 100 for Dr. Riordan for performance year 2024, reported as part of a group. Dr. Riordan accepts Medicare assignment, so Medicare's approved amount is taken as full payment.
- Accepts Medicare assignment
- Yes
Dr. Riordan's MIPS scores, performance year 2024
- 84of 100Final score
- 71.6of 100Quality
- 100of 100Promoting Interoperability
- 40of 100Improvement Activities
- 76of 100Cost
Each score is out of 100. The final score weighs the categories CMS scored for this clinician.
Sources: Doctors and Clinicians National Downloadable File (CMS); and Clinician Public Reporting: Overall MIPS Performance (CMS), 2024 data, released September 10, 2026
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Dr. Isabella Rossi Riordan has 1 publication on record
Dmand AI links 1 paper to Dr. Riordan.
Papers1
Recent publications by Dr. Riordan
See who Dr. Riordan researches with
Physician Network Discovery turns co-authorship, shared hospitals and shared groups into a map of who Dr. Riordan works with, so you can find a warm path to the right anesthesiologists.
Sources: PubMed (National Library of Medicine); and Dmand AI Research Linkage
Dr. Isabella Rossi Riordan received $344 in industry payments from 2022 to 2025
CMS Open Payments shows 12 general payments to Dr. Riordan from 5 drug and device companies from 2022 to 2025. Food and beverage make up the largest share, 74% of the total. Mindray DS USA, Inc. paid the most, $171.
General payments to Dr. Riordan by program year, 2022 to 2025
General payments to Dr. Riordan by kind, 2022 to 2025
$344in total
- Food and beverage$25374%
- Education$9026%
Companies that paid Dr. Riordan the most, 2022 to 2025
Share is of all general payments to this clinician.
Source: Open Payments (CMS), 2025 data, released July 7, 2026
Dr. Isabella Rossi Riordan graduated from Loyola University of Chicago, Stritch School of Medicine
Dr. Riordan graduated from Loyola University of Chicago, Stritch School of Medicine in 2014.
- Medical school
Source: Dmand AI Professional Profile Data
Sources for Dr. Isabella Rossi 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 DataDmand AI Org Hierarchy Data |
| Medicare services and procedure codes | Medicare Physician & Other Practitioners - by Provider and Service (CMS) (opens in a new tab) |
| State medians for the same specialty | Dmand AI Peer Benchmarks |
| Medicare patients and the all-payer patient panel | Dmand AI Patient Panel DataMedicare Physician & Other Practitioners - by Provider (CMS) (opens in a new tab) |
| Part D prescribing | Medicare Part D Prescribers - by Provider and Drug (CMS) (opens in a new tab) |
| MIPS scores, telehealth, assignment and procedure percentiles | Doctors and Clinicians National Downloadable File (CMS) (opens in a new tab)Clinician Public Reporting: Overall MIPS Performance (CMS) (opens in a new tab) |
| Publications, topics and co-authors | PubMed (National Library of Medicine) (opens in a new tab)Dmand AI Research Linkage |
| Industry payments | Open Payments (CMS) (opens in a new tab) |
| Training, board certification and memberships | Dmand AI Professional Profile Data |
| 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. Isabella Rossi 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. Isabella Rossi Riordan's NPI number?
Dr. Isabella Rossi Riordan's NPI number is 1245644525. It was assigned on June 16, 2014, and it is active in the NPI Registry.
What kind of doctor is Dr. Isabella Rossi Riordan?
Dr. Isabella Rossi Riordan is an anesthesiologist in O Fallon, Missouri. The primary specialty in the NPI Registry is Anesthesiology Physician (taxonomy code 207L00000X).
Where does Dr. Isabella Rossi Riordan practice?
Dr. Riordan practices at 2 Progress Point Pkwy, O Fallon, MO 63368. Dr. Riordan's primary practice is Progress West Hospital in O Fallon, Missouri, part of BJC Health.
What is Dr. Isabella Rossi Riordan's office phone number?
The practice phone on file for Dr. Riordan is (636) 344-2273.
What is Dr. Isabella Rossi Riordan's medical license number?
Dr. Riordan holds Missouri license 2016042732.
Which hospitals is Dr. Isabella Rossi Riordan affiliated with?
Dr. Riordan practices at Progress West Hospital in O Fallon, Missouri.
What medical group is Dr. Isabella Rossi Riordan part of?
Dr. Riordan is linked to WashU Medicine Psychiatry.
Does Dr. Isabella Rossi Riordan accept Medicare?
Yes. CMS data shows Dr. Riordan billed Medicare for 17 services in 2024, and Dr. Riordan accepts Medicare assignment.
What is Dr. Isabella Rossi Riordan's MIPS score?
Dr. Riordan's MIPS final score for performance year 2024 is 84 out of 100, reported as part of a group.
How many Medicare patients does Dr. Isabella Rossi Riordan see?
CMS counts 37 Medicare patients who saw Dr. Riordan in 2024, with an average age of 75.
Show 6 more questionsShow fewer questions
What services does Dr. Isabella Rossi Riordan bill to Medicare?
In 2024, Dr. Riordan's most billed Medicare services were surgery: brain, spine and nerves (64447).
Where did Dr. Isabella Rossi Riordan go to medical school?
Dr. Riordan graduated from Loyola University of Chicago, Stritch School of Medicine in 2014.
What drugs does Dr. Isabella Rossi Riordan prescribe most?
In 2017 Medicare Part D data, Dr. Riordan's most prescribed drugs by claims were Gabapentin and Oxycodone-Acetaminophen.
Has Dr. Isabella Rossi Riordan received payments from drug or device companies?
CMS Open Payments shows $344 in general payments to Dr. Riordan from 5 companies from 2022 to 2025. The largest total came from Mindray DS USA, Inc.
How long has Dr. Isabella Rossi Riordan been practicing?
Dr. Riordan graduated from medical school in 2014, 12 years ago.
Does Dr. Isabella Rossi Riordan do research?
Dmand AI links 1 publication to Dr. Riordan.
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