NPI registry status
Active
2026 NPPES data Psychiatric/Mental Health Nurse Practitioner NPI 1336792209 PMHNP-BC
Verify on CMS → Isabella Chai, PMHNP-BC
Psychiatric/Mental Health Nurse Practitioner in Pomona, 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 40,776 in Psychiatric/Mental Health 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
428
Medicare Part D claims · 58 beneficiaries · Psychiatric/Mental Health Nurse Practitioner avg: 927
Generic prescribing
95%
generic claims · 5% brand-name · higher generic rates reduce patient out-of-pocket costs
Industry payments
$33.73
2 payments · CMS Open Payments (Sunshine Act)
Source: CMS Medicare Part D Prescriber Public Use File, 2023
What the federal data shows
Isabella Chai, PMHNP-BC filed 428 Medicare Part D claims in 2023 as a Psychiatric/Mental Health Nurse Practitioner in Pomona, California, prescribing 95% generic.
- 428
- Part D claims, 2023
- 95%
- generic prescribing
- $33.73
- 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.
Isabella Chai, PMHNP-BC's Medicare Part D volume vs every U.S. prescriber
Total Medicare Part D claims, 2023, across all CMS prescribers nationally
428 Top 38% higher than 62% of 1,370,886 prescribers
Each bar is a band; taller bars hold more prescribers. 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 Medicare Part D Prescriber Public Use File · 2023
What does the federal data show about Isabella Chai, PMHNP-BC?
Quality data not reportedPrimary specialty
Psychiatric/Mental Health Nurse Practitioner
Medicare Part D claims
428 54% vs specialty avg
Specialty distribution in California
How Psychiatric/Mental Health Nurse Practitioner compares to other specialties among California providers
Board certification
Not published by CMS
CMS does not publish a per-provider board-certification field in NPPES. PlainDoctor does not have a reliable per-specialty certification rate to show for Psychiatric/Mental Health Nurse Practitioner. Verify directly:
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).
Isabella Chai, PMHNP-BC appears in the CMS NPPES registry as a Psychiatric/Mental Health Nurse Practitioner provider holding PMHNP-BC credentials at 2008 N GAREY AVE, Pomona, CA, 91767, with a listed phone of (909) 623-6131. NPI 1336792209 was issued on 07/19/2019.
Medicare Part D records for calendar year 2023 show 428 prescription claims written by this provider, covering 58 Medicare beneficiaries and totaling roughly $50K in drug spend, split 5% brand-name and 95% generic by claim count.
Psychiatric/Mental Health Nurse Practitioner is a mid-sized specialty nationwide, with 40,776 enrolled providers across 54 states and an average of 927 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 | 1336792209 |
|---|---|
| Specialty | Psychiatric/Mental Health Nurse Practitioner |
| Credentials | PMHNP-BC |
| Gender | Female |
| NPI Issued | 07/19/2019 |
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 Isabella Chai, PMHNP-BC. Source: openpaymentsdata.cms.gov.
Total received
$34
Largest payer
ABBVIE 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 Isabella Chai, PMHNP-BC. To verify Isabella Chai, PMHNP-BC'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 · Generic-heavy
Isabella Chai, PMHNP-BC - brand share 5.0%
Psychiatric/Mental Health Nurse Practitioner average
5% brand-name claims vs 95% generic, on 428 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.
428
Total Claims
$50K
Total Drug Cost
58
Medicare Beneficiaries
Prescribing Breakdown
- 30-Day Fills
- 646
- Total Day Supply
- 19,199
- Brand vs Generic
- 5% brand / 95% generic
- Brand Drug Cost
- $37K
- Generic Drug Cost
- $14K
Patient Demographics
- Average Patient Age
- 62.9 years
- Avg HCC Risk Score
- 1.29
- Gender Split
- 57% female / 43% male
- Age Distribution
- <65: 25, 65-74: 22, 75-84: 11, 85+: 0
Top Prescribed Drugs (Medicare Part D)
Top drugs by claim count for calendar year 2023. Based on Medicare Part D data only.
What Isabella Chai, PMHNP-BC prescribes most
Top Medicare Part D drugs by claim count, 2023
- Duloxetine Hcl
Duloxetine Hcl
34 claims
- Quetiapine Fumarate
Quetiapine Fumarate
29 claims
- Hydroxyzine Pamoate
Hydroxyzine Pamoate
26 claims
- Alprazolam
Alprazolam
24 claims
- Trazodone Hcl
Trazodone Hcl
24 claims
- Buspirone Hcl
Buspirone Hcl
22 claims
- Escitalopram Oxalate
Escitalopram Oxalate
20 claims
- Sertraline Hcl
Sertraline Hcl
20 claims
| Drug | Claims |
|---|---|
| Duloxetine Hcl | 34 |
| Quetiapine Fumarate | 29 |
| Hydroxyzine Pamoate | 26 |
| Alprazolam | 24 |
| Trazodone Hcl | 24 |
| Buspirone Hcl | 22 |
| Escitalopram Oxalate | 20 |
| Sertraline Hcl | 20 |
| Aripiprazole | 16 |
| Clonazepam | 16 |
* Counts below 11 are suppressed by CMS for patient privacy. Generic names shown where available from CMS Part D data.
More Psychiatric/Mental Health Nurse Practitioner in CA →
All providers in California →
Compare specialties →
Psychiatric/Mental Health Nurse Practitioner Overview
How Isabella Chai, PMHNP-BC fits within the Psychiatric/Mental Health Nurse Practitioner landscape nationally.
40,776
Psychiatric/Mental Health Nurse Practitioner Providers in US
54
States with Psychiatric/Mental Health Nurse Practitioner
927
Avg Claims per Provider
Isabella Chai, PMHNP-BC's 428 claims are below the specialty average of 927.
Nearby Psychiatric/Mental Health Nurse Practitioner Providers in California
Other clinicians with the same primary specialty enrolled in California, drawn from the same CMS NPPES roster as Chai.
Dr. Cristina Aamot
NP
Santa Ana, CA
Dr. Jane Abanes
NP
San Francisco, CA
Dr. Pamela Joy Abao
NP
Valencia, CA
Dr. Nefretiri Abat
PMHNP-BC
Hayward, CA
Oluwakemi Abayomi
Los Angeles, CA
Compare Psychiatric/Mental Health 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 Psychiatric/Mental Health 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.
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Frequently Asked Questions
What is Isabella Chai, PMHNP-BC's specialty? ▼
Isabella Chai, PMHNP-BC specializes in Psychiatric/Mental Health Nurse Practitioner and practices in Pomona, California. Credentials: PMHNP-BC.
How much does Isabella Chai, PMHNP-BC prescribe under Medicare Part D? ▼
In 2023, Isabella Chai, PMHNP-BC wrote 428 Medicare Part D claims totaling $50K in drug costs for 58 beneficiaries.
Where is Isabella Chai, PMHNP-BC located? ▼
Isabella Chai, PMHNP-BC is located at 2008 N GAREY AVE, Pomona, CA, 91767. Phone: (909) 623-6131.
What is Isabella Chai, PMHNP-BC's NPI number? ▼
Isabella Chai, PMHNP-BC's National Provider Identifier (NPI) is 1336792209, issued on 07/19/2019.
Does Isabella Chai, PMHNP-BC prescribe more brand-name or generic drugs? ▼
Isabella Chai, PMHNP-BC's prescribing is 5% brand-name and 95% generic drugs by claim count, with $37K in brand drug costs.
How many Psychiatric/Mental Health Nurse Practitioner providers are there in the US? ▼
There are 40,776 Psychiatric/Mental Health Nurse Practitioner providers across 54 states in the US. The average Psychiatric/Mental Health Nurse Practitioner provider writes 927 Medicare Part D claims per year.
What drugs does Isabella Chai, PMHNP-BC prescribe most often? ▼
Based on 2023 Medicare Part D data, Isabella Chai, PMHNP-BC's most frequently prescribed drugs include Duloxetine Hcl, Quetiapine Fumarate, Hydroxyzine Pamoate. This reflects Medicare Part D prescriptions only and does not include commercial insurance or other payer types.
Does Isabella Chai, PMHNP-BC accept Medicare? ▼
Isabella Chai, PMHNP-BC appears in CMS Medicare data with 428 Part D claims and 58 Medicare beneficiaries in 2023. Contact the provider's office directly to confirm current Medicare enrollment and accepted plans.
How can I verify Isabella Chai, PMHNP-BC's credentials? ▼
Isabella Chai, PMHNP-BC's NPI is 1336792209 with credentials PMHNP-BC. 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.
- 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.