Rex Francis Tjoa, NP
- Medicare patients, 2024
- 426
- Part D claims, 2024
- 3,229
- MIPS score, 2024
- 87
- Hospital affiliations
- 1
- Industry payments
- $710
- Practice address
- 17360 Brookhurst St, Fountain Valley, CA 92708
- Practice phone
- Call (877) 696-3622
- Professional email
- Get professional email
- Personal email
- Get personal email
- Mobile number
- Get mobile number
Primary practice
Memorialcare Medical Foundation
Fountain Valley, California
Find Rex Tjoa'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.
Rex Francis Tjoa is a nurse practitioner in Fountain Valley, California
Rex Tjoa practices at Memorialcare Medical Foundation in Fountain Valley, California.
Rex Tjoa's NPI, 1568979417, was assigned on January 1, 2018. Rex Tjoa holds California license NP95007349.
- NPI
- 1568979417NPI Registry (opens in a new tab)
- Medicare PAC ID
- 8426484627
- NPI enumeration date
- January 1, 2018
- NPI status
- Active
- Accepts Medicare assignment
- Yes
- Offers telehealth
- Yes
- Practice phone
- (877) 696-3622
- Professional email
- Get email
- Personal email
- Get email
- Mobile number
- Get number
- Sex
- Male
- Estimated age
- 35
- Medical school graduation
- 2017
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; Dmand AI Practice Data; and Doctors and Clinicians National Downloadable File (CMS)
Rex Francis Tjoa practices at Memorialcare Medical Foundation in Fountain Valley, California
Rex Tjoa's primary practice is Memorialcare Medical Foundation, at 17360 Brookhurst St, Fountain Valley, CA 92708 in Orange County. The practice phone is (877) 696-3622.
- Memorialcare Medical Foundation17360 Brookhurst St, Fountain Valley, CA 92708 · Orange CountyPhone(877) 696-3622
Sources: NPPES NPI Registry (CMS); and Dmand AI Practice Data
Rex Francis Tjoa is affiliated with 3 sites of care and 1 medical group
Rex Tjoa's primary practice is Memorialcare Medical Foundation in Fountain Valley, California. Rex Tjoa is also affiliated with Long Beach Medical Center. The medical group on file is MemorialCare Medical Group. Dmand AI also links Rex Tjoa to 1 more group practice or clinic, named with a free account.
Sources: NPPES NPI Registry (CMS); Dmand AI Practice Data; and Dmand AI Affiliation Data
Dmand AI tracks the EHR system at Rex Francis Tjoa's practice
Dmand AI tracks the electronic health record (EHR) system at each site where Rex Tjoa practices, 2 sites in all. Vendor and product names are available with a free account.
| Site | EHR vendor and product |
|---|---|
| Memorialcare Medical Foundation | Available with a free account |
| +2 more affiliated sites | Available with a free account |
Source: Dmand AI Technology Install Data
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Rex Francis Tjoa is one of 5,983 nurse practitioners in California
Nurse practitioner is Rex Tjoa's primary specialty in the NPI Registry, under taxonomy code 363L00000X. Rex Tjoa is licensed in California.
Specialties and state licenses
- Nurse practitioner, CaliforniaPrimary
Nurse practitioners near Rex Tjoa
Counts of nurse practitioners 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
Rex Francis Tjoa treated 426 Medicare patients in 2024, average age 73
CMS counts 426 Medicare patients who saw Rex Tjoa in 2024. The largest group is 65 to 74, with 202 patients. 75% of them have high blood pressure, and 75% have high cholesterol. 35% are also on Medicaid. Their average risk score is 1.85, where 1.00 is the Medicare average, so they are sicker than most Medicare patients.
Across all payers, Dmand AI patient panel data puts Rex Tjoa's median patient age at 66, with 50% women.
Rex Tjoa's Medicare patients by age, 2024
Rex Tjoa's Medicare patients by sex, 2024
- Women23154%
- Men19546%
Chronic conditions among Rex Tjoa's Medicare patients, 2024
- High blood pressure75%
- High cholesterol75%
- Ischemic heart disease50%
- Arthritis45%
- Diabetes42%
- Chronic kidney disease36%
- Atrial fibrillation35%
- Heart failure35%
Share of Medicare patients with each condition. A patient can have several.
Rex Tjoa's patients across all payers
Dmand AI patient panel data covers Medicare, Medicaid and commercial patients.
Patient panel by age, all payers
Median age 66
Patient panel by sex, all payers
- Women50%
- Men49%
Sources: Dmand AI Patient Panel Data; and Medicare Physician & Other Practitioners - by Provider (CMS), 2024 data
Rex Francis Tjoa wrote 3,229 Medicare Part D claims in 2024
In 2024, Rex Tjoa wrote 3,229 Medicare Part D claims for 594 patients. 78% of them were for generic drugs.
Rex Tjoa's Part D claims by kind of drug, 2024
- Generic2,513 claims78%
- Brand-name716 claims22%
Source: Medicare Part D Prescribers - by Provider (CMS), 2024 data
Rex Francis Tjoa scored 87 out of 100 in Medicare's MIPS program for 2024
CMS publishes a Merit-based Incentive Payment System (MIPS) score of 87 out of 100 for Rex Tjoa for performance year 2024, reported as part of a group. Rex Tjoa accepts Medicare assignment, so Medicare's approved amount is taken as full payment. CMS lists Rex Tjoa as offering telehealth.
- Accepts Medicare assignment
- Yes
- Offers telehealth
- Yes
Rex Tjoa's MIPS scores, performance year 2024
- 87of 100Final score
- 81.2of 100Quality
- 100of 100Promoting Interoperability
- 40of 100Improvement Activities
- 72of 100Cost
Each score is out of 100. The final score weighs the categories CMS scored for this clinician.
Sources: Doctors and Clinicians National Downloadable File (CMS); and Clinician Public Reporting: Overall MIPS Performance (CMS), 2024 data, released September 10, 2026
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Rex Francis Tjoa received $710 in industry payments in 2025
CMS Open Payments shows 13 general payments to Rex Tjoa from 10 drug and device companies in 2025. Food and beverage make up the largest share, 100% of the total. Boehringer Ingelheim Pharmaceuticals, Inc. paid the most, $141.
Companies that paid Rex Tjoa the most, 2025 to 2025
Share is of all general payments to this clinician.
Source: Open Payments (CMS), 2025 data, released July 7, 2026
Sources for Rex Francis Tjoa'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 | NPPES NPI Registry (CMS) (opens in a new tab)Dmand AI Practice Data |
| Primary practice, affiliations and health system | NPPES NPI Registry (CMS) (opens in a new tab)Dmand AI Practice DataDmand AI Affiliation Data |
| 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)Clinician Public Reporting: Overall MIPS Performance (CMS) (opens in a new tab) |
| Industry payments | Open Payments (CMS) (opens in a new tab) |
| 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 Rex Francis Tjoa
Spotted something out of date? Email hello@dmand.ai and we will check the record. Contact details live in the free trial.
What is Rex Francis Tjoa's NPI number?
Rex Francis Tjoa's NPI number is 1568979417. It was assigned on January 1, 2018, and it is active in the NPI Registry.
What does Rex Francis Tjoa specialize in?
Rex Francis Tjoa is a nurse practitioner in Fountain Valley, California. The primary specialty in the NPI Registry is Nurse Practitioner (taxonomy code 363L00000X).
Where does Rex Francis Tjoa practice?
Rex Tjoa practices at 17360 Brookhurst St, Fountain Valley, CA 92708. Rex Tjoa's primary practice is Memorialcare Medical Foundation in Fountain Valley, California. Dmand AI also links Rex Tjoa to 1 group practice or clinic.
What is Rex Francis Tjoa's office phone number?
The practice phone on file for Rex Tjoa is (877) 696-3622.
What is Rex Francis Tjoa's medical license number?
Rex Tjoa holds California license NP95007349.
Which hospitals is Rex Francis Tjoa affiliated with?
Rex Tjoa is affiliated with Long Beach Medical Center.
What medical group is Rex Francis Tjoa part of?
Rex Tjoa is linked to MemorialCare Medical Group.
Does Rex Francis Tjoa accept Medicare?
Yes. CMS lists Rex Tjoa as accepting Medicare assignment.
Does Rex Francis Tjoa offer telehealth?
Yes. The CMS Doctors and Clinicians file lists Rex Tjoa as offering telehealth services.
What is Rex Francis Tjoa's MIPS score?
Rex Tjoa's MIPS final score for performance year 2024 is 87 out of 100, reported as part of a group.
Show 3 more questionsShow fewer questions
How many Medicare patients does Rex Francis Tjoa see?
CMS counts 426 Medicare patients who saw Rex Tjoa in 2024, with an average age of 73.
Has Rex Francis Tjoa received payments from drug or device companies?
CMS Open Payments shows $710 in general payments to Rex Tjoa from 10 companies from 2025 to 2025. The largest total came from Boehringer Ingelheim Pharmaceuticals, Inc.
How long has Rex Francis Tjoa been practicing?
Rex Tjoa graduated from medical school in 2017, 9 years ago.
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