Dr. Ryan Rees, MD
- Medicare services, 2024
- 165
- Medicare patients, 2024
- 114
- Part D claims, 2024
- 107
- Hospital affiliations
- 1
- Industry payments
- $30
- Practice address
- 25500 Medical Center Drive, Murrieta, CA 92562
- Practice phone
- Call (951) 696-6000
- Professional email
- Get professional email
- Personal email
- Get personal email
- Mobile number
- Get mobile number
Primary practice
Find Dr. Rees' professional email, personal email and mobile number
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Dr. Ryan Rees is an emergency medicine physician in Murrieta, California
Dr. Rees practices at Southwest Healthcare Rancho Springs Hospital in Murrieta, California, part of Universal Health Services.
Dr. Rees' NPI, 1902466121, was assigned on June 19, 2019. Dr. Rees graduated from Washington University School of Medicine in 2019. Dr. Rees holds Missouri license 2019018217.
- NPI
- 1902466121NPI Registry (opens in a new tab)
- Medicare PAC ID
- 3678809886
- NPI enumeration date
- June 19, 2019
- NPI status
- Active
- Accepts Medicare assignment
- Yes
- Practice phone
- (951) 696-6000
- Professional email
- Get email
- Personal email
- Get email
- Mobile number
- Get number
- Sex
- Male
- Estimated age
- 33
- Medical school graduation
- 2019
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; Dmand AI Affiliation Data; and Doctors and Clinicians National Downloadable File (CMS)
Dr. Ryan Rees practices at Southwest Healthcare Rancho Springs Hospital in Murrieta, California
Dr. Rees' primary practice is Southwest Healthcare Rancho Springs Hospital, at 25500 Medical Center Drive, Murrieta, CA 92562 in Riverside County. The practice phone is (951) 696-6000.
- Southwest Healthcare Rancho Springs Hospital25500 Medical Center Drive, Murrieta, CA 92562 · Riverside CountyPhone(951) 696-6000
Source: Dmand AI Affiliation Data
Dr. Ryan Rees is affiliated with 1 site of care and 1 medical group
Dr. Rees' primary practice is Southwest Healthcare Rancho Springs Hospital in Murrieta, California, part of Universal Health Services. The medical group on file is EM Alliance.
Sources: Dmand AI Affiliation Data; and Dmand AI Org Hierarchy Data
Dmand AI tracks the EHR system at Dr. Ryan Rees' practice
Dmand AI tracks the electronic health record (EHR) system at each site where Dr. Rees practices. Vendor and product names are available with a free account.
| Site | EHR vendor and product |
|---|---|
| Southwest Healthcare Rancho Springs Hospital | Available with a free account |
Source: Dmand AI Technology Install Data
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Dr. Ryan Rees is one of 7,423 emergency medicine physicians in California
Emergency medicine is Dr. Rees' primary specialty in the NPI Registry, under taxonomy code 207P00000X. Dr. Rees is licensed in Missouri.
Specialties and state licenses
- Emergency medicine, MissouriPrimary
Emergency medicine physicians near Dr. Rees
Counts of emergency medicine physicians 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. Ryan Rees billed Medicare for 165 services in 2024
CMS data shows 165 Medicare services from Dr. Rees across 4 procedure codes in 2024, for 114 Medicare patients. Medicare paid $15,364 for them. Every service was in a facility, such as a hospital, rather than an office.
Dr. Rees' Medicare services by type, 2023 to 2024
- 2023
- 2024
- Office and hospital visits
- 2023: 912024: 11223%
- Tests and treatments
- 2023: 02024: 53
Dr. Rees compared with the California median for emergency medicine physicians, 2024
- Dr. Rees
- California median
- Medicare services
- 165vs 26538% below
- Medicare patients
- 114vs 24353% below
- Part D claims
- 11vs 6282% below
Medians across 7,079 emergency medicine physicians in California with Dmand AI profiles that report each measure.
Dr. Rees' 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.
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Sources: Medicare Physician & Other Practitioners - by Provider and Service (CMS), 2024 data; and Dmand AI Peer Benchmarks
Dr. Ryan Rees treated 114 Medicare patients in 2024, average age 75
CMS counts 114 Medicare patients who saw Dr. Rees in 2024. The largest group is 65 to 74, with 43 patients. 75% of them have high blood pressure, and 70% have high cholesterol. 43% are also on Medicaid. Their average risk score is 2.12, where 1.00 is the Medicare average, so they are sicker than most Medicare patients.
Across all payers, Dmand AI patient panel data puts Dr. Rees' median patient age at 51, with 57% women.
Dr. Rees' Medicare patients by age, 2024
Dr. Rees' Medicare patients by sex, 2024
- Women7465%
- Men4035%
Chronic conditions among Dr. Rees' Medicare patients, 2024
- High blood pressure75%
- High cholesterol70%
- Arthritis46%
- Chronic kidney disease38%
- Diabetes38%
- Mood disorders36%
- Ischemic heart disease35%
- Depression32%
Share of Medicare patients with each condition. A patient can have several.
Dr. Rees' patients across all payers
Dmand AI patient panel data covers Medicare, Medicaid and commercial patients.
Patient panel by age, all payers
Median age 51
Patient panel by sex, all payers
- Women57%
- Men42%
Sources: Dmand AI Patient Panel Data; and Medicare Physician & Other Practitioners - by Provider (CMS), 2024 data
Dr. Ryan Rees wrote 107 Medicare Part D claims in 2024
In 2024, Dr. Rees wrote 107 Medicare Part D claims for 63 patients. 93% of them were for generic drugs. CMS names the drug for 11 of them, across 1 drug with 11 or more claims each, at $30 in total drug cost. In 2023, CMS named 11 claims across 1 drug.
Dr. Rees' Part D claims by kind of drug, 2024
- Generic99 claims93%
- Brand-name and other8 claims7%
Dr. Rees' most prescribed drugs by claims, 2024
CMS names a drug when it has 11 or more claims. Share is of the claims for drugs CMS names.
Drug classes CMS tracks in Dr. Rees' Part D claims, 2024
- Opioids10%11 of 107 claims
- Antibiotics36%38 of 107 claims
Share of all Part D claims for each drug class CMS reports on. Classes with no claims are left out.
Part D claims for drugs CMS names, 2023 to 2024
- 2023
- 2024
- Claims for drugs CMS names
- 2023: 112024: 11No change
Drugs named by CMS: 1 in 2024, 1 in 2023.
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
How Dr. Ryan Rees takes part in Medicare
Dr. Rees accepts Medicare assignment, so Medicare's approved amount is taken as full payment.
- Accepts Medicare assignment
- Yes
Source: Doctors and Clinicians National Downloadable File (CMS)
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Dr. Ryan Rees received $30 in industry payments in 2025
CMS Open Payments shows 1 general payment to Dr. Rees from 1 drug or device company in 2025. Food and beverage make up the largest share, 100% of the total. Novartis Pharmaceuticals Corporation paid the most, $30.
Companies that paid Dr. Rees the most, 2025 to 2025
Share is of all general payments to this clinician.
Source: Open Payments (CMS), 2025 data, released July 7, 2026
Dr. Ryan Rees graduated from Washington University School of Medicine
Dr. Rees graduated from Washington University School of Medicine in 2019.
- Medical school
Source: Dmand AI Professional Profile Data
Sources for Dr. Ryan Rees'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)Medicare Part D Prescribers - by Provider (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) |
| 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. Ryan Rees
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. Ryan Rees' NPI number?
Dr. Ryan Rees' NPI number is 1902466121. It was assigned on June 19, 2019, and it is active in the NPI Registry.
What kind of doctor is Dr. Ryan Rees?
Dr. Ryan Rees is an emergency medicine physician in Murrieta, California. The primary specialty in the NPI Registry is Emergency Medicine Physician (taxonomy code 207P00000X).
Where does Dr. Ryan Rees practice?
Dr. Rees practices at 25500 Medical Center Drive, Murrieta, CA 92562. Dr. Rees' primary practice is Southwest Healthcare Rancho Springs Hospital in Murrieta, California, part of Universal Health Services.
What is Dr. Ryan Rees' office phone number?
The practice phone on file for Dr. Rees is (951) 696-6000.
What is Dr. Ryan Rees' medical license number?
Dr. Rees holds Missouri license 2019018217.
Which hospitals is Dr. Ryan Rees affiliated with?
Dr. Rees practices at Southwest Healthcare Rancho Springs Hospital in Murrieta, California.
What medical group is Dr. Ryan Rees part of?
Dr. Rees is linked to EM Alliance.
Does Dr. Ryan Rees accept Medicare?
Yes. CMS data shows Dr. Rees billed Medicare for 165 services in 2024, and Dr. Rees accepts Medicare assignment.
How many Medicare patients does Dr. Ryan Rees see?
CMS counts 114 Medicare patients who saw Dr. Rees in 2024, with an average age of 75.
What services does Dr. Ryan Rees bill to Medicare?
In 2024, Dr. Rees' most billed Medicare services were emergency department visit (99285), heart test or procedure (93010) and emergency department visit (99284).
Show 4 more questionsShow fewer questions
Where did Dr. Ryan Rees go to medical school?
Dr. Rees graduated from Washington University School of Medicine in 2019.
What drugs does Dr. Ryan Rees prescribe most?
In 2024 Medicare Part D data, Dr. Rees' most prescribed drugs by claims were Ondansetron HCl.
Has Dr. Ryan Rees received payments from drug or device companies?
CMS Open Payments shows $30 in general payments to Dr. Rees from 1 company from 2025 to 2025. The largest total came from Novartis Pharmaceuticals Corporation.
How long has Dr. Ryan Rees been practicing?
Dr. Rees graduated from medical school in 2019, 7 years ago.
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