NPI registry status
Active
2026 NPPES data Gerontology Nurse Practitioner NPI 1003408642 NP
Verify on CMS → Hsing-Chun Hsieh, NP
Gerontology Nurse Practitioner in Alhambra, 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 9,706 in Gerontology 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
729
Medicare Part D claims · 275 beneficiaries · Gerontology Nurse Practitioner avg: 1K
Generic prescribing
65%
generic claims · 35% brand-name · higher generic rates reduce patient out-of-pocket costs
Industry payments
$1.3K
13 payments · CMS Open Payments (Sunshine Act)
Source: CMS Medicare Part D Prescriber Public Use File, 2023
Compiled from official public sources by the PlainDoctor editorial team.
What the federal data shows
Hsing-Chun Hsieh, NP filed 729 Medicare Part D claims in 2023 as a Gerontology Nurse Practitioner in Alhambra, California, prescribing 65% generic.
- 729
- Part D claims, 2023
- 65%
- generic prescribing
- $1.3K
- 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.
Hsing-Chun Hsieh, NP's Medicare Part D volume vs every U.S. prescriber
Total Medicare Part D claims, 2023, across all CMS prescribers nationally
729 Top 29% higher than 71% 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 Hsing-Chun Hsieh, NP?
Quality data not reportedPrimary specialty
Gerontology Nurse Practitioner
Medicare Part D claims
729 43% vs specialty avg
Specialty distribution in California
How Gerontology 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 Gerontology 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).
Hsing-Chun Hsieh, NP appears in the CMS NPPES registry as a Gerontology Nurse Practitioner provider holding NP credentials at 116 S CHAPEL AVE APT V, Alhambra, CA, 91801, with a listed phone of (626) 399-3423. NPI 1003408642 was issued on 02/04/2021.
Medicare Part D records for calendar year 2023 show 729 prescription claims written by this provider, covering 275 Medicare beneficiaries and totaling roughly $3.1 million in drug spend, split 35% brand-name and 65% generic by claim count, with an opioid prescribing rate of 6.0%.
Gerontology Nurse Practitioner is a mid-sized specialty nationwide, with 9,706 enrolled providers across 54 states and an average of 1,283 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 | 1003408642 |
|---|---|
| Specialty | Gerontology Nurse Practitioner |
| Credentials | NP |
| Gender | Female |
| NPI Issued | 02/04/2021 |
Hospital and facility affiliations
Facilities where Hsing-Chun Hsieh, NP bills Medicare from. Star ratings (1-5) are CMS Hospital Compare's "Hospital overall rating" - a composite of mortality, readmission, patient experience, safety, timely care, and efficient use of medical imaging measures. Source: CMS Care Compare.
Altea Medical California PC
Eureka, CA
Affiliations sourced from CMS Doctors and Clinicians National Downloadable File; hospital ratings from CMS Hospital General Information dataset (cross-referenced by facility name + state).
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 Hsing-Chun Hsieh, NP. Source: openpaymentsdata.cms.gov.
Total received
$1.3K
Largest payer
Novartis Pharmaceuticals Corporation
Most common payment type
Long term medical supply or device loan
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 Hsing-Chun Hsieh, NP. To verify Hsing-Chun Hsieh, NP'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 · Above average
Hsing-Chun Hsieh, NP - brand share 35.0%
Gerontology Nurse Practitioner average
35% brand-name claims vs 65% generic, on 729 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.
729
Total Claims
$3.1M
Total Drug Cost
275
Medicare Beneficiaries
Prescribing Breakdown
- 30-Day Fills
- 1,037
- Total Day Supply
- 28,790
- Brand vs Generic
- 35% brand / 65% generic
- Brand Drug Cost
- $2.8M
- Generic Drug Cost
- $345K
- Opioid Claims
- 44 (6.0% rate)
Patient Demographics
- Average Patient Age
- 73.7 years
- Avg HCC Risk Score
- 2.56
- Gender Split
- 60% female / 40% male
- Age Distribution
- <65: 26, 65-74: 124, 75-84: 98, 85+: 27
Top Prescribed Drugs (Medicare Part D)
Top drugs by claim count for calendar year 2023. Based on Medicare Part D data only.
What Hsing-Chun Hsieh, NP prescribes most
Top Medicare Part D drugs by claim count, 2023
- Anastrozole
Anastrozole
87 claims
- Alendronate Sodium
Alendronate Sodium
37 claims
- Letrozole
Letrozole
35 claims
- Xtandi 26
Xtandi
26 claims
- Abiraterone Acetate 24
Abiraterone Acetate
24 claims
- Hydrocodone-Acetam… 22
Hydrocodone-Acetaminophen
22 claims
- Hydroxyurea 21
Hydroxyurea
21 claims
- Eliquis 20
Eliquis
20 claims
| Drug | Claims |
|---|---|
| Anastrozole | 87 |
| Alendronate Sodium | 37 |
| Letrozole | 35 |
| Xtandi Enzalutamide | 26 |
| Abiraterone Acetate | 24 |
| Hydrocodone-Acetaminophen Hydrocodone/Acetaminophen | 22 |
| Hydroxyurea | 21 |
| Eliquis Apixaban | 20 |
| Dexamethasone | 18 |
| Prednisone | 18 |
* Counts below 11 are suppressed by CMS for patient privacy. Generic names shown where available from CMS Part D data.
Gerontology Nurse Practitioner Overview
How Hsing-Chun Hsieh, NP fits within the Gerontology Nurse Practitioner landscape nationally.
9,706
Gerontology Nurse Practitioner Providers in US
54
States with Gerontology Nurse Practitioner
1,283
Avg Claims per Provider
Hsing-Chun Hsieh, NP's 729 claims are below the specialty average of 1,283.
Nearby Gerontology Nurse Practitioner Providers in California
Other clinicians with the same primary specialty enrolled in California, drawn from the same CMS NPPES roster as Hsieh.
Dr. Abigail Abar-Calica
N.P.
Menlo Park, CA
Dr. Michelle Abrams
NP
Thousand Oaks, CA
Dr. Karina Acevedo
AGACNP-BC
Los Angeles, CA
Dr. Lisa Adamek
NP
Roseville, CA
Dr. Mary Ahmadian
N.P.
Irvine, CA
Compare Gerontology 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 Gerontology 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 Hsing-Chun Hsieh, NP's specialty? ▼
Hsing-Chun Hsieh, NP specializes in Gerontology Nurse Practitioner and practices in Alhambra, California. Credentials: NP.
How much does Hsing-Chun Hsieh, NP prescribe under Medicare Part D? ▼
In 2023, Hsing-Chun Hsieh, NP wrote 729 Medicare Part D claims totaling $3.1M in drug costs for 275 beneficiaries.
Where is Hsing-Chun Hsieh, NP located? ▼
Hsing-Chun Hsieh, NP is located at 116 S CHAPEL AVE APT V, Alhambra, CA, 91801. Phone: (626) 399-3423.
What is Hsing-Chun Hsieh, NP's NPI number? ▼
Hsing-Chun Hsieh, NP's National Provider Identifier (NPI) is 1003408642, issued on 02/04/2021.
Does Hsing-Chun Hsieh, NP prescribe more brand-name or generic drugs? ▼
Hsing-Chun Hsieh, NP's prescribing is 35% brand-name and 65% generic drugs by claim count, with $2.8M in brand drug costs.
Does Hsing-Chun Hsieh, NP prescribe opioids? ▼
Yes, Hsing-Chun Hsieh, NP had 44 opioid claims in 2023 with an opioid prescribing rate of 6.0%.
How many Gerontology Nurse Practitioner providers are there in the US? ▼
There are 9,706 Gerontology Nurse Practitioner providers across 54 states in the US. The average Gerontology Nurse Practitioner provider writes 1,283 Medicare Part D claims per year.
What drugs does Hsing-Chun Hsieh, NP prescribe most often? ▼
Based on 2023 Medicare Part D data, Hsing-Chun Hsieh, NP's most frequently prescribed drugs include Anastrozole, Alendronate Sodium, Letrozole. This reflects Medicare Part D prescriptions only and does not include commercial insurance or other payer types.
Does Hsing-Chun Hsieh, NP accept Medicare? ▼
Hsing-Chun Hsieh, NP appears in CMS Medicare data with 729 Part D claims and 275 Medicare beneficiaries in 2023. Contact the provider's office directly to confirm current Medicare enrollment and accepted plans.
How can I verify Hsing-Chun Hsieh, NP's credentials? ▼
Hsing-Chun Hsieh, NP's NPI is 1003408642 with credentials NP. 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
Compiled from official public sources by the PlainDoctor editorial team.
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.