Marshall Roy Koon, PA-C
- Medicare services, 2024
- 35
- Medicare patients, 2024
- 38
- Part D claims, 2024
- 69
- MIPS score, 2024
- 97
- Hospital affiliations
- 2
- Practice address
- 4445 Magnolia Avenue, Riverside, CA 92501
- Practice phone
- Call (951) 788-3000
- Professional email
- Get professional email
- Personal email
- Get personal email
- Mobile number
- Get mobile number
Primary practice
Find Marshall Koon's professional email, personal email and mobile number
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Marshall Roy Koon is a physician assistant in Riverside, California
Marshall Koon practices at Riverside Community Hospital in Riverside, California, part of HCA Healthcare.
Marshall Koon's NPI, 1982939302, was assigned on October 4, 2009. Marshall Koon holds California license PA20578.
- NPI
- 1982939302NPI Registry (opens in a new tab)
- NPI enumeration date
- October 4, 2009
- NPI status
- Active
- Practice phone
- (951) 788-3000
- Professional email
- Get email
- Personal email
- Get email
- Mobile number
- Get number
- Sex
- Male
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; and Dmand AI Affiliation Data
Marshall Roy Koon practices at Riverside Community Hospital in Riverside, California
Marshall Koon's primary practice is Riverside Community Hospital, at 4445 Magnolia Avenue, Riverside, CA 92501 in Riverside County. The practice phone is (951) 788-3000.
- Riverside Community Hospital4445 Magnolia Avenue, Riverside, CA 92501 · Riverside CountyPhone(951) 788-3000
Source: Dmand AI Affiliation Data
Marshall Roy Koon is affiliated with 2 sites of care and 2 medical groups
Marshall Koon's primary practice is Riverside Community Hospital in Riverside, California, part of HCA Healthcare. Marshall Koon is also affiliated with Providence St. Mary Medical Center. The medical group on file is Vituity. Dmand AI also links Marshall Koon to 1 more medical group, named with a free account.
Sources: Dmand AI Affiliation Data; and Dmand AI Org Hierarchy Data
Dmand AI tracks the EHR system at Marshall Roy Koon's practice
Dmand AI tracks the electronic health record (EHR) system at each site where Marshall Koon practices, 2 sites in all. Vendor and product names are available with a free account.
| Site | EHR vendor and product |
|---|---|
| Riverside Community Hospital | Available with a free account |
| +1 more site and 1 medical group | Available with a free account |
Source: Dmand AI Technology Install Data
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Marshall Roy Koon is one of 2,381 physician assistants in California
Medical is Marshall Koon's primary specialty in the NPI Registry, under taxonomy code 363AM0700X. Marshall Koon is board certified in certified physician assistant by the National Commission on Certification of Physician Assistants (NCCPA). Marshall Koon is licensed in California.
Specialties and state licenses
- Medical physician assistant, CaliforniaPrimary
Physician assistants near Marshall Koon
Counts of physician assistants 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
Marshall Roy Koon billed Medicare for 35 services in 2024
CMS data shows 35 Medicare services from Marshall Koon across 2 procedure codes in 2024, for 38 Medicare patients. Medicare paid $3,263 for them. Every service was in a facility, such as a hospital, rather than an office.
Marshall Koon compared with the California median for physician assistants, 2024
- Marshall Koon
- California median
- Medicare services
- 35vs 27887% below
- Medicare patients
- 38vs 11667% below
Medians across 1,473 physician assistants in California with Dmand AI profiles that report each measure.
Marshall Koon'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.
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Sources: Medicare Physician & Other Practitioners - by Provider and Service (CMS), 2024 data; and Dmand AI Peer Benchmarks
Marshall Roy Koon treated 38 Medicare patients in 2024, average age 63
CMS counts 38 Medicare patients who saw Marshall Koon in 2024. The largest group is under 65, with 16 patients. 75% of them have high blood pressure, and 71% have high cholesterol. Their average risk score is 2.42, where 1.00 is the Medicare average, so they are sicker than most Medicare patients.
Across all payers, Dmand AI patient panel data puts Marshall Koon's median patient age at 44, with 58% women.
Marshall Koon's Medicare patients by age, 2024
CMS leaves out age groups with fewer than 11 patients.
Marshall Koon's Medicare patients by sex, 2024
- Women1539%
- Men2361%
Chronic conditions among Marshall Koon's Medicare patients, 2024
- High blood pressure75%
- High cholesterol71%
- Diabetes53%
- Mood disorders47%
- Anxiety45%
- Depression45%
- Arthritis39%
- Alcohol and drug use disorders34%
Share of Medicare patients with each condition. A patient can have several.
Marshall Koon's patients across all payers
Dmand AI patient panel data covers Medicare, Medicaid and commercial patients.
Patient panel by age, all payers
Median age 44
Patient panel by sex, all payers
- Women58%
- Men42%
Sources: Dmand AI Patient Panel Data; and Medicare Physician & Other Practitioners - by Provider (CMS), 2024 data
Marshall Roy Koon wrote 69 Medicare Part D claims in 2024
In 2024, Marshall Koon wrote 69 Medicare Part D claims for 44 patients. 94% of them were for generic drugs.
Marshall Koon's Part D claims by kind of drug, 2024
- Generic65 claims94%
- Brand-name and other4 claims6%
Drug classes CMS tracks in Marshall Koon's Part D claims, 2024
- Antibiotics29%20 of 69 claims
Share of all Part D claims for each drug class CMS reports on. Classes with no claims are left out.
Source: Medicare Part D Prescribers - by Provider (CMS), 2024 data
Marshall Roy Koon scored 97 out of 100 in Medicare's MIPS program for 2024
CMS publishes a Merit-based Incentive Payment System (MIPS) score of 97 out of 100 for Marshall Koon for performance year 2024, reported as part of a group.
Marshall Koon's MIPS scores, performance year 2024
- 97of 100Final score
- 90of 100Quality
- 40of 100Improvement Activities
- 78of 100Cost
Each score is out of 100. The final score weighs the categories CMS scored for this clinician.
Source: Clinician Public Reporting: Overall MIPS Performance (CMS), 2024 data, released September 10, 2026
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Marshall Roy Koon is board certified in certified physician assistant
- Board certified in certified physician assistant
Source: Dmand AI Professional Profile Data
Sources for Marshall Roy Koon'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 (CMS) (opens in a new tab) |
| MIPS scores, telehealth, assignment and procedure percentiles | Clinician Public Reporting: Overall MIPS Performance (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 Marshall Roy Koon
Spotted something out of date? Email hello@dmand.ai and we will check the record. Contact details live in the free trial.
What is Marshall Roy Koon's NPI number?
Marshall Roy Koon's NPI number is 1982939302. It was assigned on October 4, 2009, and it is active in the NPI Registry.
What does Marshall Roy Koon specialize in?
Marshall Roy Koon is a physician assistant in Riverside, California. The primary specialty in the NPI Registry is Medical Physician Assistant (taxonomy code 363AM0700X).
Where does Marshall Roy Koon practice?
Marshall Koon practices at 4445 Magnolia Avenue, Riverside, CA 92501. Marshall Koon's primary practice is Riverside Community Hospital in Riverside, California, part of HCA Healthcare. Dmand AI also links Marshall Koon to 1 medical group.
What is Marshall Roy Koon's office phone number?
The practice phone on file for Marshall Koon is (951) 788-3000.
What is Marshall Roy Koon's medical license number?
Marshall Koon holds California license PA20578.
Which hospitals is Marshall Roy Koon affiliated with?
Marshall Koon practices at Riverside Community Hospital in Riverside, California. Marshall Koon is also affiliated with Providence St. Mary Medical Center.
What medical group is Marshall Roy Koon part of?
Marshall Koon is linked to Vituity. Dmand AI links Marshall Koon to 1 more medical group.
Does Marshall Roy Koon accept Medicare?
Yes. CMS data shows Marshall Koon billed Medicare for 35 services in 2024.
What is Marshall Roy Koon's MIPS score?
Marshall Koon's MIPS final score for performance year 2024 is 97 out of 100, reported as part of a group.
How many Medicare patients does Marshall Roy Koon see?
CMS counts 38 Medicare patients who saw Marshall Koon in 2024, with an average age of 63.
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Is Marshall Roy Koon board certified?
Yes. Marshall Koon is board certified in certified physician assistant by the National Commission on Certification of Physician Assistants (NCCPA).
What services does Marshall Roy Koon bill to Medicare?
In 2024, Marshall Koon's most billed Medicare services were emergency department visit (99284) and emergency department visit (99285).
How long has Marshall Roy Koon been practicing?
Marshall Koon's NPI was assigned in 2009.
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