Dr. Richard X. Nguyen, MD
- Medicare services, 2024
- 8,787
- Medicare patients, 2024
- 311
- Part D claims, 2024
- 6,814
- MIPS score, 2024
- 91
- Hospital affiliations
- 2
- Practice address
- 1400 West Gonzales Road, Oxnard, CA 93036
- Practice phone
- Call (805) 983-0324
- Professional email
- Get professional email
- Personal email
- Get personal email
- Mobile number
- Get mobile number
Primary practice
Oxnard Manor Healthcare Center
Skilled Nursing Facility · Oxnard, California
Find Dr. Nguyen'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. Richard X. Nguyen is an internist in Oxnard, California
Dr. Nguyen practices at Oxnard Manor Healthcare Center in Oxnard, California.
Dr. Nguyen's NPI, 1699960708, was assigned on September 11, 2007. Dr. Nguyen graduated from Chicago Medical School at Rosalind Franklin University of Medicine and Science in 1994. Dr. Nguyen holds California license A56329.
- NPI
- 1699960708NPI Registry (opens in a new tab)
- Medicare PAC ID
- 3971556572
- NPI enumeration date
- September 11, 2007
- NPI status
- Active
- Offers telehealth
- Yes
- Practice phone
- (805) 983-0324
- Professional email
- Get email
- Personal email
- Get email
- Mobile number
- Get number
- Sex
- Male
- Estimated age
- 58
- Medical school graduation
- 1994
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; Dmand AI Affiliation Data; and Doctors and Clinicians National Downloadable File (CMS)
Dr. Richard X. Nguyen practices at Oxnard Manor Healthcare Center in Oxnard, California
Dr. Nguyen's primary practice is Oxnard Manor Healthcare Center, at 1400 West Gonzales Road, Oxnard, CA 93036 in Ventura County. The practice phone is (805) 983-0324.
- Oxnard Manor Healthcare Center1400 West Gonzales Road, Oxnard, CA 93036 · Ventura CountyPhone(805) 983-0324
Source: Dmand AI Affiliation Data
Dr. Richard X. Nguyen is affiliated with 11 sites of care
Dr. Nguyen's primary practice is Oxnard Manor Healthcare Center in Oxnard, California. Dr. Nguyen is also affiliated with Dignity Health - St. John's Regional Medical Center. Dmand AI also links Dr. Nguyen to 1 more hospital, 5 home health agencies, 2 hospices and 1 physician office, 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. Richard X. Nguyen's practice
Dmand AI tracks the electronic health record (EHR) system at each site where Dr. Nguyen practices, 11 sites in all. Vendor and product names are available with a free account.
| Site | EHR vendor and product |
|---|---|
| Oxnard Manor Healthcare Center | Available with a free account |
| +10 more affiliated sites | Available with a free account |
Source: Dmand AI Technology Install Data
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Dr. Richard X. Nguyen is one of 16,751 internists in California
Internal medicine is Dr. Nguyen's primary specialty in the NPI Registry, under taxonomy code 207R00000X. Dr. Nguyen is licensed in California.
Specialties and state licenses
- Internal medicine, CaliforniaPrimary
Clinical focus
Dmand AI lists acute gastroduodenitis, acute mini-stroke (TIA), acute skin infection, aneurysm, ankle or foot injury, anxiety, arthritis and asthma among the conditions Dr. Nguyen treats.
Internists near Dr. Nguyen
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. Richard X. Nguyen billed Medicare for 8,787 services in 2024
CMS data shows 8,787 Medicare services from Dr. Nguyen across 33 procedure codes in 2024, for 311 Medicare patients. Medicare paid $525,493 for them.
Dr. Nguyen's Medicare services by type, 2023 to 2024
- 2023
- 2024
- Office and hospital visits
- 2023: 6,6042024: 6,1926%
- Tests and treatments
- 2023: 1,0642024: 82522%
- Lab and pathology
- 2023: 5952024: 74625%
- Drugs given in the office
- 2023: 9192024: 67626%
- Other services
- 2023: 3472024: 348No change
Where Dr. Nguyen's Medicare services took place, 2024
- In an office8,48797%
- In a facility3003%
Dr. Nguyen compared with the California median for internists, 2024
- Dr. Nguyen
- California median
- Medicare services
- 8,787vs 36124.3 times
- Medicare patients
- 311vs 1512.1 times
- Part D claims
- 6,063vs 42114.4 times
Medians across 15,815 internists in California with Dmand AI profiles that report each measure.
Dr. Nguyen'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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Medicare shows one payer. Book a meeting to get commercial claims data for Dr. Nguyen and other internists in California.
Sources: Medicare Physician & Other Practitioners - by Provider and Service (CMS), 2024 data; and Dmand AI Peer Benchmarks
Dr. Richard X. Nguyen treated 311 Medicare patients in 2024, average age 77
CMS counts 311 Medicare patients who saw Dr. Nguyen in 2024. The largest group is 85 and over, with 98 patients. 75% of them have anxiety, and 75% have depression. 67% are also on Medicaid. Their average risk score is 2.08, 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. Nguyen's median patient age at 78, with 55% women.
Dr. Nguyen's Medicare patients by age, 2024
Dr. Nguyen's Medicare patients by sex, 2024
- Women18860%
- Men12340%
Chronic conditions among Dr. Nguyen's Medicare patients, 2024
- Anxiety75%
- Depression75%
- High blood pressure75%
- High cholesterol75%
- Mood disorders75%
- Personality disorders73%
- Arthritis57%
- Diabetes54%
Share of Medicare patients with each condition. A patient can have several.
Dr. Nguyen's patients across all payers
Dmand AI patient panel data covers Medicare, Medicaid and commercial patients.
Patient panel by age, all payers
Median age 78
Patient panel by sex, all payers
- Women55%
- Men44%
Sources: Dmand AI Patient Panel Data; and Medicare Physician & Other Practitioners - by Provider (CMS), 2024 data
Dr. Richard X. Nguyen wrote 6,814 Medicare Part D claims in 2024
In 2024, Dr. Nguyen wrote 6,814 Medicare Part D claims for 305 patients. 87% of them were for generic drugs. CMS names the drug for 6,063 of them, across 119 drugs with 11 or more claims each, at $373,811 in total drug cost. In 2023, CMS named 4,638 claims across 98 drugs.
Dr. Nguyen's Part D claims by kind of drug, 2024
- Generic5,926 claims87%
- Brand-name815 claims12%
- Other73 claims1%
Dr. Nguyen's 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. Nguyen's Part D claims, 2024
- Opioids5%307 of 6,814 claims
- Antibiotics3%174 of 6,814 claims
- Antipsychotics, patients 65 and over1%57 of 6,814 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: 4,6382024: 6,06331%
Drugs named by CMS: 119 in 2024, 98 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
Dr. Richard X. Nguyen scored 91 out of 100 in Medicare's MIPS program for 2024
CMS publishes a Merit-based Incentive Payment System (MIPS) score of 91 out of 100 for Dr. Nguyen for performance year 2024, reported as part of a group. CMS lists Dr. Nguyen as offering telehealth.
- Offers telehealth
- Yes
Dr. Nguyen's MIPS scores, performance year 2024
- 91of 100Final score
- 99.1of 100Quality
- 57of 100Promoting Interoperability
- 40of 100Improvement Activities
- 75of 100Cost
Each score is out of 100. The final score weighs the categories CMS scored for this clinician.
Removal of skin lesions: 1 to 10 procedures (CMS shows small counts as a range)
Removal of tissue: 1 to 10 procedures (CMS shows small counts as a range)
Sources: Doctors and Clinicians National Downloadable File (CMS); Clinician Public Reporting: Overall MIPS Performance (CMS), 2024 data, released September 10, 2026; and Doctors and Clinicians Utilization Data (CMS)
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Dr. Richard X. Nguyen received $540 in industry payments from 2016 to 2025
CMS Open Payments shows 20 general payments to Dr. Nguyen from 9 drug and device companies from 2016 to 2025. Food and beverage make up the largest share, 100% of the total. Sun Pharmaceutical Industries Inc. paid the most, $132.
General payments to Dr. Nguyen by program year, 2016 to 2025
Companies that paid Dr. Nguyen the most, 2016 to 2025
Share is of all general payments to this clinician.
Source: Open Payments (CMS), 2025 data, released July 7, 2026
Dr. Richard X. Nguyen has 1 award and honors on record
Dmand AI lists 1 award for Dr. Nguyen, most recently CMS Stage 1 EHR in 2013.
Awards and honors for Dr. Nguyen
- 2013
- CMS Stage 1 EHR
Source: Dmand AI Professional Profile Data
Dr. Richard X. Nguyen graduated from Chicago Medical School at Rosalind Franklin University of Medicine and Science
Dr. Nguyen graduated from Chicago Medical School at Rosalind Franklin University of Medicine and Science in 1994.
- Medical school
Source: Dmand AI Professional Profile Data
Dr. Richard X. Nguyen accepts plans from 7 insurance carriers
Dr. Nguyen is in network with 7 carriers, including Elevance, Aetna and Blue Cross Blue Shield of Michigan. Medicare plans come from the most carriers, 7. Check the plan with the practice before a visit.
- Elevance
- Aetna
- Blue Cross Blue Shield of Michigan
- Blue Cross Blue Shield of Massachusetts
- HCSC
- Regence Health Plans
- CMS Medicare
Plan types Dr. Nguyen accepts, by number of carriers
- Medicare7
- PPO6
- HMO3
- POS3
- EPO2
- Medicaid1
Source: Dmand AI Insurance Network Data
Sources for Dr. Richard X. Nguyen'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)Clinician Public Reporting: Overall MIPS Performance (CMS) (opens in a new tab)Doctors and Clinicians Utilization Data (CMS) (opens in a new tab) |
| Industry payments | Open Payments (CMS) (opens in a new tab) |
| Awards and committee roles | Dmand AI Professional Profile Data |
| 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. Richard X. Nguyen
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. Richard X. Nguyen's NPI number?
Dr. Richard X. Nguyen's NPI number is 1699960708. It was assigned on September 11, 2007, and it is active in the NPI Registry.
What kind of doctor is Dr. Richard X. Nguyen?
Dr. Richard X. Nguyen is an internist in Oxnard, California. The primary specialty in the NPI Registry is Internal Medicine Physician (taxonomy code 207R00000X).
Where does Dr. Richard X. Nguyen practice?
Dr. Nguyen practices at 1400 West Gonzales Road, Oxnard, CA 93036. Dr. Nguyen's primary practice is Oxnard Manor Healthcare Center in Oxnard, California. Dmand AI also links Dr. Nguyen to 1 hospital, 5 home health agencies, 2 hospices and 1 physician office.
What is Dr. Richard X. Nguyen's office phone number?
The practice phone on file for Dr. Nguyen is (805) 983-0324.
What is Dr. Richard X. Nguyen's medical license number?
Dr. Nguyen holds California license A56329.
Which hospitals is Dr. Richard X. Nguyen affiliated with?
Dr. Nguyen is affiliated with Dignity Health - St. John's Regional Medical Center. Dmand AI links Dr. Nguyen to 1 more hospital.
Does Dr. Richard X. Nguyen accept Medicare?
Yes. CMS data shows Dr. Nguyen billed Medicare for 8,787 services in 2024.
Does Dr. Richard X. Nguyen offer telehealth?
Yes. The CMS Doctors and Clinicians file lists Dr. Nguyen as offering telehealth services.
What is Dr. Richard X. Nguyen's MIPS score?
Dr. Nguyen's MIPS final score for performance year 2024 is 91 out of 100, reported as part of a group.
How many Medicare patients does Dr. Richard X. Nguyen see?
CMS counts 311 Medicare patients who saw Dr. Nguyen in 2024, with an average age of 77.
Show 6 more questionsShow fewer questions
What services does Dr. Richard X. Nguyen bill to Medicare?
In 2024, Dr. Nguyen's most billed Medicare services were care management and other visits (99484), care management and other visits (99491) and office visit, established patient (99214).
Where did Dr. Richard X. Nguyen go to medical school?
Dr. Nguyen graduated from Chicago Medical School at Rosalind Franklin University of Medicine and Science in 1994.
What drugs does Dr. Richard X. Nguyen prescribe most?
In 2024 Medicare Part D data, Dr. Nguyen's most prescribed drugs by claims were Atorvastatin Calcium, Omeprazole and Levothyroxine Sodium.
Has Dr. Richard X. Nguyen received payments from drug or device companies?
CMS Open Payments shows $540 in general payments to Dr. Nguyen from 9 companies from 2016 to 2025. The largest total came from Sun Pharmaceutical Industries Inc.
How long has Dr. Richard X. Nguyen been practicing?
Dr. Nguyen graduated from medical school in 1994, 32 years ago.
What insurance does Dr. Richard X. Nguyen accept?
Dr. Nguyen is in network with 7 carriers, including Elevance, Aetna and Blue Cross Blue Shield of Michigan. Medicare plans come from the most carriers, 7. Check the plan with the practice before a visit.
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