Dr. Stuart L. Posner, MD
- Medicare services, 2023
- 8,233
- Part D claims, 2024
- 11
- Hospital affiliations
- 1
- Industry payments
- $2,947
- Medical group
- 1
- Practice address
- 10800 Magnolia Avenue, Riverside, CA 92505
- Practice phone
- Call (951) 353-2000
- Professional email
- Get professional email
- Personal email
- Get personal email
- Mobile number
- Get mobile number
Primary practice
Find Dr. Posner'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. Stuart L. Posner is a rheumatologist in Riverside, California
Dr. Posner practices at Riverside Medical Center in Riverside, California, part of Kaiser Permanente.
Dr. Posner's NPI, 1679536676, was assigned on April 10, 2006. Dr. Posner graduated from State University of NY Upstate Medical University in 1968. Dr. Posner holds Arizona license 9295.
- NPI
- 1679536676NPI Registry (opens in a new tab)
- NPI enumeration date
- April 10, 2006
- NPI status
- Active
- Practice phone
- (951) 353-2000
- Professional email
- Get email
- Personal email
- Get email
- Mobile number
- Get number
- Sex
- Male
- Estimated age
- 84
- Medical school graduation
- 1968
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; Dmand AI Affiliation Data; and Doctors and Clinicians National Downloadable File (CMS)
Dr. Stuart L. Posner practices at Riverside Medical Center in Riverside, California
Dr. Posner's primary practice is Riverside Medical Center, at 10800 Magnolia Avenue, Riverside, CA 92505 in Riverside County. The practice phone is (951) 353-2000.
- Riverside Medical Center10800 Magnolia Avenue, Riverside, CA 92505 · Riverside CountyPhone(951) 353-2000
Sources: Dmand AI Affiliation Data; and Doctors and Clinicians National Downloadable File (CMS)
Dr. Stuart L. Posner is affiliated with 2 sites of care and 1 medical group
Dr. Posner's primary practice is Riverside Medical Center in Riverside, California, part of Kaiser Permanente. The medical group on file is Southern California Permanente Medical Group. Dmand AI also links Dr. Posner to 1 more physician office, named with a free account.
Sources: Dmand AI Affiliation Data; Doctors and Clinicians National Downloadable File (CMS); and Dmand AI Org Hierarchy Data
Dmand AI tracks the EHR system at Dr. Stuart L. Posner's practice
Dmand AI tracks the electronic health record (EHR) system at each site where Dr. Posner practices, 2 sites in all. Vendor and product names are available with a free account.
| Site | EHR vendor and product |
|---|---|
| Riverside Medical Center | Available with a free account |
| +1 more affiliated site | Available with a free account |
Source: Dmand AI Technology Install Data
For health IT teams
Dmand AI maps EHR vendors, IT decision makers and buying committees across Kaiser Permanente and 6.2K+ hospitals, with verified contacts in the same login.
Dr. Stuart L. Posner is one of 821 rheumatologists in California
Rheumatology is Dr. Posner's primary specialty in the NPI Registry, under taxonomy code 207RR0500X. Dr. Posner is licensed in Arizona.
Specialties and state licenses
- Rheumatology, ArizonaPrimary
Rheumatologists near Dr. Posner
Counts of rheumatologists 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. Stuart L. Posner billed Medicare for 8,233 services in 2023
CMS data shows 8,233 Medicare services from Dr. Posner across 12 procedure codes in 2023. Medicare paid $192,781 for them. Every service was in an office.
Dr. Posner's Medicare services by type, 2022 to 2023
- 2022
- 2023
- Drugs given in the office
- 2022: 4,7272023: 7,68763%
- Office and hospital visits
- 2022: 4512023: 32029%
- Tests and treatments
- 2022: 2042023: 2124%
- Surgery
- 2022: 342023: 1459%
Dr. Posner compared with the California median for rheumatologists, 2023
- Dr. Posner
- California median
- Medicare services
- 8,233vs 9009.1 times
- Part D claims
- 309vs 96268% below
Medians across 773 rheumatologists in California with Dmand AI profiles that report each measure.
Dr. Posner's most billed Medicare procedure codes, 2023
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. Posner?
Medicare shows one payer. Book a meeting to get commercial claims data for Dr. Posner and other rheumatologists in California.
Sources: Medicare Physician & Other Practitioners - by Provider and Service (CMS), 2024 data; and Dmand AI Peer Benchmarks
Dr. Stuart L. Posner's patients have a median age of 68
Across all payers, Dmand AI patient panel data puts Dr. Posner's median patient age at 68, with 83% women.
Dr. Posner's patients across all payers
Dmand AI patient panel data covers Medicare, Medicaid and commercial patients.
Patient panel by age, all payers
Median age 68
Patient panel by sex, all payers
- Women83%
- Men15%
Source: Dmand AI Patient Panel Data
Dr. Stuart L. Posner wrote 11 Medicare Part D claims in 2024
In 2024, Dr. Posner wrote 11 Medicare Part D claims. They cover 10 drugs, with $401,710 in total drug cost. In 2022, CMS named 3,830 claims across 34 drugs.
Dr. Posner's most prescribed drugs by claims, 2023
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, 2022 to 2023
- 2022
- 2023
- Claims for drugs CMS names
- 2022: 3,8302023: 30992%
Drugs named by CMS: 10 in 2023, 34 in 2022.
Sources: Medicare Part D Prescribers - by Provider and Drug (CMS), 2024 data, released May 6, 2026; and Medicare Part D Prescribers - by Provider (CMS), 2024 data
For MedTech and pharma teams
Filter 7.4M+ HCPs by Medicare procedures, Part D drugs and Open Payments history, then reach them with verified contacts in one login.
Dr. Stuart L. Posner received $2,947 in industry payments from 2017 to 2024
CMS Open Payments shows 60 general payments to Dr. Posner from 17 drug and device companies from 2017 to 2024. Honoraria make up the largest share, 51% of the total. Horizon Pharma plc paid the most, $1,717.
General payments to Dr. Posner by program year, 2017 to 2024
General payments to Dr. Posner by kind, 2017 to 2024
- Honoraria$1,50051%
- Food and beverage$1,44749%
Companies that paid Dr. Posner the most, 2017 to 2024
Share is of all general payments to this clinician.
Source: Open Payments (CMS), 2025 data, released July 7, 2026
Dr. Stuart L. Posner graduated from State University of NY Upstate Medical University
Dr. Posner graduated from State University of NY Upstate Medical University in 1968.
- Medical school
Source: Dmand AI Professional Profile Data
Sources for Dr. Stuart L. Posner'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 DataDoctors and Clinicians National Downloadable File (CMS) (opens in a new tab) |
| Primary practice, affiliations and health system | Dmand AI Affiliation DataDoctors and Clinicians National Downloadable File (CMS) (opens in a new tab)Dmand 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 Data |
| Part D prescribing | Medicare Part D Prescribers - by Provider and Drug (CMS) (opens in a new tab)Medicare Part D Prescribers - by Provider (CMS) (opens in a new tab) |
| 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. Stuart L. Posner
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. Stuart L. Posner's NPI number?
Dr. Stuart L. Posner's NPI number is 1679536676. It was assigned on April 10, 2006, and it is active in the NPI Registry.
What kind of doctor is Dr. Stuart L. Posner?
Dr. Stuart L. Posner is a rheumatologist in Riverside, California. The primary specialty in the NPI Registry is Rheumatology Physician (taxonomy code 207RR0500X).
Where does Dr. Stuart L. Posner practice?
Dr. Posner practices at 10800 Magnolia Avenue, Riverside, CA 92505. Dr. Posner's primary practice is Riverside Medical Center in Riverside, California, part of Kaiser Permanente. Dmand AI also links Dr. Posner to 1 physician office.
What is Dr. Stuart L. Posner's office phone number?
The practice phone on file for Dr. Posner is (951) 353-2000.
What is Dr. Stuart L. Posner's medical license number?
Dr. Posner holds Arizona license 9295.
Which hospitals is Dr. Stuart L. Posner affiliated with?
Dr. Posner practices at Riverside Medical Center in Riverside, California.
What medical group is Dr. Stuart L. Posner part of?
Dr. Posner is linked to Southern California Permanente Medical Group.
Does Dr. Stuart L. Posner accept Medicare?
Yes. CMS data shows Dr. Posner billed Medicare for 8,233 services in 2023.
What services does Dr. Stuart L. Posner bill to Medicare?
In 2023, Dr. Posner's most billed Medicare services were injected or infused drug (J0129), injected or infused drug (J0897) and injected or infused drug (J1602).
Where did Dr. Stuart L. Posner go to medical school?
Dr. Posner graduated from State University of NY Upstate Medical University in 1968.
Show 3 more questionsShow fewer questions
What drugs does Dr. Stuart L. Posner prescribe most?
In 2023 Medicare Part D data, Dr. Posner's most prescribed drugs by claims were Methotrexate, Prednisone and Hydroxychloroquine Sulfate.
Has Dr. Stuart L. Posner received payments from drug or device companies?
CMS Open Payments shows $2,947 in general payments to Dr. Posner from 17 companies from 2017 to 2024. The largest total came from Horizon Pharma plc.
How long has Dr. Stuart L. Posner been practicing?
Dr. Posner graduated from medical school in 1968, 58 years ago.
Selling to rheumatology practices?
See rheumatologists in California by site of care and group
Find the practices, groups and hospitals they work with, and the right people to contact at each.
- 30 days free
- Self-serve
- No credit card