Dr. James Wilson Mar, DO
- Medicare services, 2024
- 364
- Medicare patients, 2024
- 96
- Part D claims, 2024
- 74
- Hospital affiliations
- 2
- Industry payments
- $128
- 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 Dr. Mar's professional email, personal email and mobile number
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Dr. James Wilson Mar is an internist in Riverside, California
Dr. Mar practices at Riverside Community Hospital in Riverside, California, part of HCA Healthcare.
Dr. Mar's NPI, 1982267449, was assigned on April 19, 2019. Dr. Mar graduated from Arizona College of Osteopathic Medicine - Glendale in 2018. Dr. Mar holds Arizona license 009700.
- NPI
- 1982267449NPI Registry (opens in a new tab)
- Medicare PAC ID
- 6204212707
- NPI enumeration date
- April 19, 2019
- NPI status
- Active
- Accepts Medicare assignment
- Yes
- Practice phone
- (951) 788-3000
- Professional email
- Get email
- Personal email
- Get email
- Mobile number
- Get number
- Sex
- Male
- Estimated age
- 34
- Medical school graduation
- 2018
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; Dmand AI Affiliation Data; and Doctors and Clinicians National Downloadable File (CMS)
Dr. James Wilson Mar practices at Riverside Community Hospital in Riverside, California
Dr. Mar'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
Dr. James Wilson Mar is affiliated with 2 sites of care and 3 medical groups
Dr. Mar's primary practice is Riverside Community Hospital in Riverside, California, part of HCA Healthcare. Dr. Mar is also affiliated with Parkview Community Hospital Medical Center. The medical group on file is Inpatient Specialist of California PC. Dmand AI also links Dr. Mar to 2 more medical groups, each named with a free account.
Sources: Dmand AI Affiliation Data; and Dmand AI Org Hierarchy Data
Dmand AI tracks the EHR system at Dr. James Wilson Mar's practice
Dmand AI tracks the electronic health record (EHR) system at each site where Dr. Mar 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 2 medical groups | Available with a free account |
Source: Dmand AI Technology Install Data
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Dr. James Wilson Mar is one of 16,751 internists in California
Internal medicine is Dr. Mar's primary specialty in the NPI Registry, under taxonomy code 207R00000X. Dr. Mar is board certified in 2019 - 2027 by the AZ State License. Dr. Mar is licensed in Arizona.
Specialties and state licenses
- Internal medicine, ArizonaPrimary
Clinical focus
Dmand AI lists acute respiratory failure, congestive heart failure, gastrointestinal inflammation, hypertension, sepsis and stroke among the conditions Dr. Mar treats.
Internists near Dr. Mar
Counts of internists 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. James Wilson Mar billed Medicare for 364 services in 2024
CMS data shows 364 Medicare services from Dr. Mar across 5 procedure codes in 2024, for 96 Medicare patients. Medicare paid $38,415 for them. Every service was in a facility, such as a hospital, rather than an office.
Dr. Mar compared with the California median for internists, 2024
- Dr. Mar
- California median
- Medicare services
- 364vs 361Close to median
- Medicare patients
- 96vs 15136% below
Medians across 15,815 internists in California with Dmand AI profiles that report each measure.
Dr. Mar'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
Dr. James Wilson Mar treated 96 Medicare patients in 2024, average age 72
CMS counts 96 Medicare patients who saw Dr. Mar in 2024. The largest group is 65 to 74, with 55 patients. 75% of them have high blood pressure, and 75% have high cholesterol. Their average risk score is 3.29, 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. Mar's median patient age at 61, with 50% women.
Dr. Mar's Medicare patients by age, 2024
CMS leaves out age groups with fewer than 11 patients.
Dr. Mar's Medicare patients by sex, 2024
- Women4850%
- Men4850%
Chronic conditions among Dr. Mar's Medicare patients, 2024
- High blood pressure75%
- High cholesterol75%
- Diabetes64%
- Heart failure57%
- Chronic kidney disease56%
- Arthritis48%
- Ischemic heart disease44%
- COPD43%
Share of Medicare patients with each condition. A patient can have several.
Dr. Mar's patients across all payers
Dmand AI patient panel data covers Medicare, Medicaid and commercial patients.
Patient panel by age, all payers
Median age 61
Patient panel by sex, all payers
- Women50%
- Men50%
Sources: Dmand AI Patient Panel Data; and Medicare Physician & Other Practitioners - by Provider (CMS), 2024 data
Dr. James Wilson Mar wrote 74 Medicare Part D claims in 2024
In 2024, Dr. Mar wrote 74 Medicare Part D claims for 33 patients. 82% of them were for generic drugs.
Dr. Mar's Part D claims by kind of drug, 2024
- Generic61 claims82%
- Brand-name13 claims18%
Drug classes CMS tracks in Dr. Mar's Part D claims, 2024
- Antibiotics18%13 of 74 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
How Dr. James Wilson Mar takes part in Medicare
Dr. Mar 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. James Wilson Mar received $128 in industry payments in 2024
CMS Open Payments shows 2 general payments to Dr. Mar from 2 drug and device companies in 2024. Food and beverage make up the largest share, 100% of the total. ZOLL Services LLC (A/K/A ZOLL LifeCor Corp) paid the most, $99.
Companies that paid Dr. Mar the most, 2024 to 2024
Share is of all general payments to this clinician.
Source: Open Payments (CMS), 2025 data, released July 7, 2026
Dr. James Wilson Mar graduated from Arizona College of Osteopathic Medicine - Glendale
Dr. Mar graduated from Arizona College of Osteopathic Medicine - Glendale in 2018.
- Medical school
- Board certified in 2019 - 2027
- Board certified in 2022 - 2025
Source: Dmand AI Professional Profile Data
Dr. James Wilson Mar accepts plans from 2 insurance carriers
Dr. Mar is in network with 2 carriers, including United Healthcare and CMS Medicare. Medicare plans come from the most carriers, 2. Check the plan with the practice before a visit.
- United Healthcare
- CMS Medicare
Plan types Dr. Mar accepts, by number of carriers
- Medicare2
- HMO1
- POS1
- PPO1
Source: Dmand AI Insurance Network Data
Sources for Dr. James Wilson Mar'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 | 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 |
| Insurance carriers and plan types | Dmand AI Insurance Network 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. James Wilson Mar
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. James Wilson Mar's NPI number?
Dr. James Wilson Mar's NPI number is 1982267449. It was assigned on April 19, 2019, and it is active in the NPI Registry.
What kind of doctor is Dr. James Wilson Mar?
Dr. James Wilson Mar is an internist in Riverside, California. The primary specialty in the NPI Registry is Internal Medicine Physician (taxonomy code 207R00000X).
Where does Dr. James Wilson Mar practice?
Dr. Mar practices at 4445 Magnolia Avenue, Riverside, CA 92501. Dr. Mar's primary practice is Riverside Community Hospital in Riverside, California, part of HCA Healthcare. Dmand AI also links Dr. Mar to 2 medical groups.
What is Dr. James Wilson Mar's office phone number?
The practice phone on file for Dr. Mar is (951) 788-3000.
What is Dr. James Wilson Mar's medical license number?
Dr. Mar holds Arizona license 009700.
Which hospitals is Dr. James Wilson Mar affiliated with?
Dr. Mar practices at Riverside Community Hospital in Riverside, California. Dr. Mar is also affiliated with Parkview Community Hospital Medical Center.
What medical group is Dr. James Wilson Mar part of?
Dr. Mar is linked to Inpatient Specialist of California PC. Dmand AI links Dr. Mar to 2 more medical groups.
Does Dr. James Wilson Mar accept Medicare?
Yes. CMS data shows Dr. Mar billed Medicare for 364 services in 2024, and Dr. Mar accepts Medicare assignment.
How many Medicare patients does Dr. James Wilson Mar see?
CMS counts 96 Medicare patients who saw Dr. Mar in 2024, with an average age of 72.
Is Dr. James Wilson Mar board certified?
Yes. Dr. Mar is board certified in 2019 - 2027 by the AZ State License.
Show 5 more questionsShow fewer questions
What services does Dr. James Wilson Mar bill to Medicare?
In 2024, Dr. Mar's most billed Medicare services were hospital inpatient care (99233), hospital inpatient care (99239) and critical care (99291).
Where did Dr. James Wilson Mar go to medical school?
Dr. Mar graduated from Arizona College of Osteopathic Medicine - Glendale in 2018.
Has Dr. James Wilson Mar received payments from drug or device companies?
CMS Open Payments shows $128 in general payments to Dr. Mar from 2 companies from 2024 to 2024. The largest total came from ZOLL Services LLC (A/K/A ZOLL LifeCor Corp).
How long has Dr. James Wilson Mar been practicing?
Dr. Mar graduated from medical school in 2018, 8 years ago.
What insurance does Dr. James Wilson Mar accept?
Dr. Mar is in network with 2 carriers, including United Healthcare and CMS Medicare. Medicare plans come from the most carriers, 2. Check the plan with the practice before a visit.
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