NPI registry status
Active
2026 NPPES data Family Nurse Practitioner NPI 1821583576 FNP
Verify on CMS → Rex Chan, FNP
Family Nurse Practitioner in Folsom, California.
This profile is drawn from the federal National Provider Identifier Registry (CMS NPPES), which lists more than 7 million U.S. healthcare providers - including 210,832 in Family Nurse Practitioner, and covers specialty classification, practice address, and Medicare Part D prescribing data when reported. According to CMS, every field reflects the provider's official federal registration, see our methodology.
Federal data, no proprietary rating.
We show these CMS records as-is - no composite score, no star rating, no editorial opinion layered on top.
Prescribing volume
2K
Medicare Part D claims · 451 beneficiaries · Family Nurse Practitioner avg: 1K
Generic prescribing
0%
generic claims · 53% brand-name · higher generic rates reduce patient out-of-pocket costs
MIPS score
72.4/100
▼ 11 pts below national avg 83.1 · Mid-tier
Industry payments
$4.2K
36 payments · CMS Open Payments (Sunshine Act)
Source: CMS Medicare Part D Prescriber Public Use File, 2023
What the federal data shows
Rex Chan, FNP reported a CMS MIPS final score of 72.4/100 - below the 83.1 national average - and filed 1,743 Medicare Part D claims in 2023.
- 72.4/100
- MIPS score · -11 vs avg
- 2K
- Part D claims, 2023
- 0%
- generic prescribing
- $4.2K
- industry payments (Sunshine Act)
Every figure on this page comes straight from federal CMS records (NPPES, Medicare Part D, MIPS, Open Payments) - no proprietary rating or editorial opinion is applied.
Rex Chan, FNP's MIPS score vs every scored U.S. clinician
CMS Merit-based Incentive Payment System (MIPS) final score, 2023, the federal quality measure
72 10th percentile higher than 10% of 477,587 scored providers
Each bar is a band; taller bars hold more scored providers. The dashed line + filled bar mark this entry. Hover or tap any bar for its full count, share, and where it sits relative to this entry.
Source CMS Merit-based Incentive Payment System (MIPS) · 2023
Where Rex Chan, FNP sits
This provider among family nurse practitioner peers
Across the 27,154 family nurse practitioner providers who report both Medicare Part D prescribing and a MIPS quality score, Rex Chan, FNP writes more Part D claims than 78% of them and scores higher on MIPS quality than 10% - placing this provider in the high-volume, lower-quality quadrant. Volume reflects patient-panel size and specialty, not quality; the two axes are independent.
Part D claim volume vs MIPS quality, by specialty percentile
Each dot is one family nurse practitioner peer from a representative sample of 60; the gold marker is Rex Chan, FNP. Source: CMS Medicare Part D Prescriber data and the CMS Merit-based Incentive Payment System, 2023.
What does the federal data show about Rex Chan, FNP?
Below national averagePrimary specialty
Family Nurse Practitioner
Medicare Part D claims
1,743 43% vs specialty avg
MIPS final score
72.4/100 10.7 pts vs avg
Specialty distribution in California
How Family Nurse Practitioner compares to other specialties among California providers
Medicare quality performance, MIPS
Rex Chan, FNP's 2023 MIPS final score plotted against the Family Nurse Practitioner national average
- MIPS Final Score
- 72.4/100
- vs 83.1 national avg · 2023 performance year
MIPS final score (Family Nurse Practitioner) - 72.4/100 vs national avg 83.1
How MIPS and board certification work
The Merit-based Incentive Payment System (MIPS) scores providers 0–100 across four performance categories: Quality, Cost, Promoting Interoperability, and Improvement Activities, weighted under 42 CFR §414.1380. Reporting is voluntary for many small practices, so absence of a MIPS score is not a quality signal.
Board certification through an ABMS or AOA member board signals voluntary post-licensure examination plus continuous Maintenance of Certification cycles. Verify any individual provider's status through certificationmatters.org (ABMS) or osteopathic.org (AOA).
Rex Chan, FNP appears in the CMS NPPES registry as a Family Nurse Practitioner provider holding FNP credentials at 1631 CREEKSIDE DR STE 102, Folsom, CA, 95630, with a listed phone of (916) 250-0377. NPI 1821583576 was issued on 06/26/2018.
Medicare Part D records for calendar year 2023 show 1,743 prescription claims written by this provider, covering 451 Medicare beneficiaries and totaling roughly $4.1 million in drug spend, split 53% brand-name and 0% generic by claim count. On the CMS Merit-based Incentive Payment System, this provider earned a Final Score of 72.4/100 for the 2023 performance year (Quality 62.8, Cost 34.2), compared with the national average of 83.1.
Family Nurse Practitioner is a high-volume specialty nationwide, with 210,832 enrolled providers across 56 states and an average of 1,222 Part D claims per prescriber, so the context for interpreting these metrics differs meaningfully from a primary-care baseline.
Important: PlainDoctor is a directory of publicly available government data, not medical advice, a malpractice database, or a quality rating. Inclusion here does not imply a recommendation, and absence of complaints or sanctions on this page does not mean none exist, always verify credentials through the NPPES NPI Registry, your state medical board, and the ABMS or AOA before making healthcare decisions.
Practice Address
Provider Details
| NPI | 1821583576 |
|---|---|
| Specialty | Family Nurse Practitioner |
| Credentials | FNP |
| Gender | Male |
| NPI Issued | 06/26/2018 |
CMS Quality Score (MIPS)
Merit-based Incentive Payment System (MIPS) scores from CMS, 2023 performance year.
72.3661
Final Score
Avg: 83.1
62.8229
Quality
34.2307
Cost
93
Promoting Interoperability
Reporting: Group practice
Industry payments received (2024) - CMS Open Payments transparency data
The federal Physician Payments Sunshine Act (part of the Affordable Care Act) requires drug and medical-device manufacturers + group purchasing organizations to publicly report payments and other transfers of value to physicians and teaching hospitals. The data below covers 2024 for Rex Chan, FNP. Source: openpaymentsdata.cms.gov.
Total received
$4.2K
Largest payer
ACCORD HEALTHCARE, INC.
Most common payment type
Food and Beverage
Industry payments are not necessarily indicators of bias, they include research funding, consulting fees for evidence-based work, royalties for inventions, food at conferences, and similar items. The disclosure exists for transparency. Read our methodology for how we interpret this data.
License & disciplinary context - California MBC 2023 annual report
Aggregate state board data only, NOT a determination of any individual provider's status. The figures below describe statewide disciplinary activity across all ~150K California medical licensees in 2023 - they are NOT specific to Rex Chan, FNP. To verify Rex Chan, FNP's current license status, search the MBC public license lookup directly, or check the Federation of State Medical Boards (FSMB) verification service.
576
Total board actions, California 2023
Across 556 cases
3.84
Actions per 1,000 licensees
California statewide rate
probation
Most common action type
186 cases
MBC publishes annual disciplinary statistics as part of public-record reporting under each state's Administrative Procedure Act. See the full breakdown by action type and year on the California disciplinary trends page. Cross-checked against FSMB U.S. Medical Regulatory Trends.
Brand vs generic prescribing mix · Brand-heavy
Rex Chan, FNP - brand share 53.0%
Family Nurse Practitioner average
53% brand-name claims vs 0% generic, on 1,743 2023 Medicare Part D claims.
The federal Medicare Part D Generic Dispensing Rate national benchmark sits near 90% generic / 10% brand for primary-care prescribers, per CMS Office of the Actuary 2024 estimates. Higher brand share is common in specialty prescribing where generic equivalents are not available.
Medicare Part D Prescribing Data
CMS Medicare Part D prescriber-level data for calendar year 2023.
1,743
Total Claims
$4.1M
Total Drug Cost
451
Medicare Beneficiaries
Prescribing Breakdown
- 30-Day Fills
- 2,194
- Total Day Supply
- 61,249
- Brand vs Generic
- 53% brand / 0% generic
- Brand Drug Cost
- $4.1M
- Antibiotic Claims
- 298
Patient Demographics
- Average Patient Age
- 74.6 years
- Avg HCC Risk Score
- 1.47
- Gender Split
- 20% female / 80% male
- Age Distribution
- <65: 35, 65-74: 204, 75-84: 155, 85+: 57
Top Prescribed Drugs (Medicare Part D)
Top drugs by claim count for calendar year 2023. Based on Medicare Part D data only.
What Rex Chan, FNP prescribes most
Top Medicare Part D drugs by claim count, 2023
- Orgovyx
Orgovyx
478 claims
- Tamsulosin Hcl
Tamsulosin Hcl
263 claims
- Myrbetriq
Myrbetriq
223 claims
- Xtandi 163
Xtandi
163 claims
- Cephalexin 105
Cephalexin
105 claims
- Finasteride 100
Finasteride
100 claims
- Nitrofurantoin Mon… 77
Nitrofurantoin Mono-Macro
77 claims
- Ciprofloxacin Hcl 76
Ciprofloxacin Hcl
76 claims
| Drug | Claims |
|---|---|
| Orgovyx Relugolix | 478 |
| Tamsulosin Hcl | 263 |
| Myrbetriq Mirabegron | 223 |
| Xtandi Enzalutamide | 163 |
| Cephalexin | 105 |
| Finasteride | 100 |
| Nitrofurantoin Mono-Macro Nitrofurantoin Monohyd/M-Cryst | 77 |
| Ciprofloxacin Hcl | 76 |
| Methenamine Hippurate | 57 |
| Sulfamethoxazole-Trimethoprim Sulfamethoxazole/Trimethoprim | 29 |
* Counts below 11 are suppressed by CMS for patient privacy. Generic names shown where available from CMS Part D data.
Family Nurse Practitioner Overview
How Rex Chan, FNP fits within the Family Nurse Practitioner landscape nationally.
210,832
Family Nurse Practitioner Providers in US
56
States with Family Nurse Practitioner
1,222
Avg Claims per Provider
Rex Chan, FNP's 1,743 claims are above the specialty average of 1,222.
Nearby Family Nurse Practitioner Providers in California
Other clinicians with the same primary specialty enrolled in California, drawn from the same CMS NPPES roster as Chan.
Dr. Danielle Aaroe
FAMILY NURSE PRACTIT
Oroville, CA
Joshua Aaron
Mission Hills, CA
Dr. Orly Aaron
NP
San Francisco, CA
Paris Gilbert Russ Aaron
Sacramento, CA
Dr. Alvin Joseph Abad
FNP-C
San Francisco, CA
Compare Family Nurse Practitioner nationally: see state-by-state distribution →
Before you book an appointment
Use this federal record as your verification checklist, not as a recommendation.
- Confirm the NPI record is current in the official CMS registry, providers update their own NPPES details, and moves can lag. Verify this NPI
- Check the active license and any disciplinary history with the California medical board, federal registration is not a license check. Credential verification guide
- Weigh a second option: compare this provider with a nearby Family Nurse Practitioner peer on Medicare volume and prescribing patterns. Compare providers
Medicare Part D and MIPS figures describe practice patterns in federal programs only, they are not quality ratings, and PlainDoctor does not rate, rank, or recommend providers.
Healthcare Guides
Learn more about finding, verifying, and understanding healthcare providers.
How to Find a Doctor
Step-by-step guide to choosing a provider
Verify Credentials
Check NPI, board certification & license status
Medical Specialties Explained
Who treats what and how specialties differ
Understanding Medicare Claims Data
What prescribing data reveals about a provider
In-Network vs Out-of-Network
How insurance networks affect your costs
Telehealth Guide
Virtual care options and coverage in 2026
Explore California
Frequently Asked Questions
What is Rex Chan, FNP's specialty? ▼
Rex Chan, FNP specializes in Family Nurse Practitioner and practices in Folsom, California. Credentials: FNP.
How much does Rex Chan, FNP prescribe under Medicare Part D? ▼
In 2023, Rex Chan, FNP wrote 1,743 Medicare Part D claims totaling $4.1M in drug costs for 451 beneficiaries.
What is Rex Chan, FNP's Medicare quality score? ▼
Rex Chan, FNP has a CMS MIPS Final Score of 72.4/100 (Quality: 62.8, Cost: 34.2). The national average MIPS Final Score is 83.1. Source: CMS Merit-based Incentive Payment System (MIPS) 2023.
Where is Rex Chan, FNP located? ▼
Rex Chan, FNP is located at 1631 CREEKSIDE DR STE 102, Folsom, CA, 95630. Phone: (916) 250-0377.
What is Rex Chan, FNP's NPI number? ▼
Rex Chan, FNP's National Provider Identifier (NPI) is 1821583576, issued on 06/26/2018.
Does Rex Chan, FNP prescribe more brand-name or generic drugs? ▼
Rex Chan, FNP's prescribing is 53% brand-name and 0% generic drugs by claim count, with $4.1M in brand drug costs.
How many Family Nurse Practitioner providers are there in the US? ▼
There are 210,832 Family Nurse Practitioner providers across 56 states in the US. The average Family Nurse Practitioner provider writes 1,222 Medicare Part D claims per year.
What drugs does Rex Chan, FNP prescribe most often? ▼
Based on 2023 Medicare Part D data, Rex Chan, FNP's most frequently prescribed drugs include Orgovyx, Tamsulosin Hcl, Myrbetriq. This reflects Medicare Part D prescriptions only and does not include commercial insurance or other payer types.
Does Rex Chan, FNP accept Medicare? ▼
Rex Chan, FNP appears in CMS Medicare data with 1,743 Part D claims and 451 Medicare beneficiaries in 2023. Contact the provider's office directly to confirm current Medicare enrollment and accepted plans.
How can I verify Rex Chan, FNP's credentials? ▼
Rex Chan, FNP's NPI is 1821583576 with credentials FNP. You can verify this through the NPPES NPI Registry, check state medical board records, and confirm board certification through the ABMS or AOA.
Data Sources
View source datasets and methodology notes
- Provider Directory
- CMS National Plan and Provider Enumeration System (NPPES), download.cms.gov/nppes, updated monthly. Contains NPI, specialty, credentials, and practice location.
- Specialty Classification
- NUCC Health Care Provider Taxonomy (nucc.org), the industry standard for classifying provider specialties in Medicare and Medicaid billing.
- Prescribing Data
- CMS Medicare Part D Prescriber Public Use File (2023). Includes claims, drug costs, beneficiaries, and opioid prescribing rates.
- Quality Performance
- CMS Merit-based Incentive Payment System (MIPS) - 2023 performance year.
- Limitations
- Provider data is self-reported to CMS. Prescribing data reflects Medicare Part D only and does not include commercial insurance, Medicaid, or cash prescriptions. Claims below 11 beneficiaries are suppressed by CMS for privacy.
See our complete data methodology for details on how we collect and process government data.
Data as of April 2026 (NPPES) / 2023 (Medicare Part D). Source: Centers for Medicare & Medicaid Services (CMS).
Disclaimer: Data from CMS NPPES and Medicare Part D. PlainDoctor does not rate or rank providers. Provider information is self-reported and may not be current. Always verify information directly with the provider. About · Methodology
Every figure on PlainDoctor is rendered directly from the federal CMS NPPES registry, Medicare Part D, MIPS, and Open Payments records, no number is typed in by an editor. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error. Data current as of May 2026.