NPI registry status
Active
2026 NPPES data Cardiovascular Disease Physician NPI 1083008262 M.D.
Verify on CMS → Ho-Hin Choy, M.D.
Cardiovascular Disease Physician in Fairfield, 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 25,298 in Cardiovascular Disease Physician, 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 · 355 beneficiaries · Cardiovascular Disease Physician avg: 3K
Generic prescribing
77%
generic claims · 23% brand-name · higher generic rates reduce patient out-of-pocket costs
Industry payments
$4.0K
68 payments · CMS Open Payments (Sunshine Act)
Source: CMS Medicare Part D Prescriber Public Use File, 2024
What the federal data shows
Ho-Hin Choy, M.D. filed 1,687 Medicare Part D claims in 2024 as a Cardiovascular Disease Physician in Fairfield, California, prescribing 77% generic.
- 2K
- Part D claims, 2024
- 77%
- generic prescribing
- Likely
- board-certified (heuristic)
- ≥81st
- pct by Part D claim volume (lower-bound band)
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.
Federal trust snapshot
What official records show about Ho-Hin Choy, M.D.
Federal records show an active NPI with Medicare Part D prescribing activity — verifiable registry data, not a proprietary rating.
- Verified
NPI registry status
Active listing in the CMS National Provider Identifier Registry (NPI 1083008262), first enumerated 03/25/2015.
Source: CMS NPPES
- Reported
Medicare Part D participation
Filed 1,687 Medicare Part D prescription claims in the 2023 CMS public use file — indicates active Medicare prescribing participation.
Source: CMS Part D Prescriber PUF
- Reported
Board certification signal
Heuristic suggests board-certified status based on ABMS-eligible specialty taxonomy plus active CMS participation signals — not a direct ABMS verification.
- Reported
Hospital affiliations
2 CMS Care Compare hospital affiliations on record — practice footprint from the Doctors and Clinicians file.
Source: CMS Care Compare
- Reported
Industry payment transparency
$4.0K in reported industry payments (68 transfers) in 2024 under the federal Sunshine Act — disclosed transfers of value, not a quality rating.
Source: CMS Open Payments
- State context
State board disciplinary context
California statewide board action statistics are published annually — these figures describe aggregate state activity, not Ho-Hin Choy, M.D.'s individual license status. Verify directly with the state medical board.
Source: MBC annual report 2023
- Not in federal data
Individual sanction lookup
PlainDoctor does not publish per-provider disciplinary determinations. Confirm current license and any individual actions through the state medical board or FSMB verification service.
Source: State medical board / FSMB
This trust snapshot summarizes only what appears in federal CMS/NPPES public records. It is not a composite score, star rating, patient review, or clinical recommendation. PlainDoctor never fabricates reviews or AggregateRating schema.
Compare Choy with other Cardiovascular Disease Physician providers
Same primary specialty, same federal CMS NPPES roster.
Also enrolled in California
- Dr. Abdul Abbasi, MD Long Beach, CA
- Dr. Lillian Abdelmalek, MD Sacramento, CA
- Robin Abdelmalik, M.D. FACC Temecula, CA
- Dr. Roberto Abdelnur, MD El Centro, CA
- Dr. Sohail Abdi-Moradi, M.D. Moorpark, CA
- Dr. Nadia Abelhad, M.D. Chula Vista, CA
Other specialties in Fairfield: Behavior Technician (719) · Marriage & Family Therapist (184) · Mental Health Counselor (181) · Addiction (Substance Use Disorder) Counselor (181)
CMS NPPES provider registry desk
NPI 1083008262 · Cardiovascular Disease Physician
NPI-10 · ENUM-MID · TAX-MID · RX-MID · BOOK-LIGHT · PHOTO-ENUM
- NPI-10 1083008262
- ENUM-MID 2015
- TAX-MID 25K Cardiovascular Disease
- RX-MID 1,687
- BOOK-LIGHT 2,322 in California
- PHOTO-ENUM Lynn Zaremski, M.D. · 2015
Ho-Hin Choy, M.D.'s Medicare Part D volume vs every U.S. prescriber
Total Medicare Part D claims, 2024, across all CMS prescribers nationally
1,687 ≥ 81st percentile 81% of 1,416,883 prescribers are in lower value bands
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.
The percentile is a conservative 100-claim band: it counts only prescribers in lower claim-volume bands. Medicare Part D claim volume is activity context, not a quality measure or recommendation. See methodology § corpus placement.
Source CMS Medicare Part D Prescriber Public Use File · 2024
✓
Board certification likely (heuristic, not verified)
Ho-Hin Choy, M.D. practices in an ABMS-board-eligible specialty and shows active CMS Medicare participation + 2 hospital affiliations - signals consistent with board-certified status. For verified board certification, see CertificationMatters.org (the official ABMS public lookup).
What does the federal data show about Ho-Hin Choy, M.D.?
Quality data not reportedPrimary specialty
Cardiovascular Disease Physician
Medicare Part D claims
1,687 46% vs specialty avg
Specialty distribution in California
How Cardiovascular Disease Physician 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 Cardiovascular Disease Physician. 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).
Practice Address
Provider Details
| NPI | 1083008262 |
|---|---|
| Specialty | Cardiovascular Disease Physician |
| Credentials | M.D. |
| Gender | Male |
| NPI Issued | 03/25/2015 |
Hospital and facility affiliations
Facilities where Ho-Hin Choy, M.D. 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.
Northbay Health Medical Foundation
Fairfield, CA
Northbay Physicians Surgery Center, LLC
Fairfield, 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 Ho-Hin Choy, M.D.. Source: openpaymentsdata.cms.gov.
Total received
$4.0K
Largest payer
Abbott Laboratories
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 Ho-Hin Choy, M.D.. To verify Ho-Hin Choy, M.D.'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 · Typical
Ho-Hin Choy, M.D. - brand share 23.0%
Cardiovascular Disease Physician average
23% brand-name claims vs 77% generic, on 1,687 2024 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 2024.
1,687
Total Claims
$331K
Total Drug Cost
355
Medicare Beneficiaries
Prescribing Breakdown
- 30-Day Fills
- 3,602.6
- Total Day Supply
- 107,520
- Brand vs Generic
- 23% brand / 77% generic
- Brand Drug Cost
- $315K
- Generic Drug Cost
- $16K
Patient Demographics
- Average Patient Age
- 74.9 years
- Avg HCC Risk Score
- 1.71
- Gender Split
- 44% female / 56% male
- Age Distribution
- <65: 18, 65-74: 164, 75-84: 129, 85+: 44
Top Prescribed Drugs (Medicare Part D)
Top drugs by claim count for calendar year 2024. Based on Medicare Part D data only.
What Ho-Hin Choy, M.D. prescribes most
Top Medicare Part D drugs by claim count, 2024
- Metoprolol Succinate
Metoprolol Succinate
344 claims
- Furosemide
Furosemide
165 claims
- Eliquis 122
Eliquis
122 claims
- Clopidogrel 109
Clopidogrel
109 claims
- Carvedilol 103
Carvedilol
103 claims
- Amlodipine Besylate 88
Amlodipine Besylate
88 claims
- Atorvastatin Calcium 75
Atorvastatin Calcium
75 claims
- Losartan Potassium 72
Losartan Potassium
72 claims
| Drug | Claims |
|---|---|
| Metoprolol Succinate | 344 |
| Furosemide | 165 |
| Eliquis Apixaban | 122 |
| Clopidogrel Clopidogrel Bisulfate | 109 |
| Carvedilol | 103 |
| Amlodipine Besylate | 88 |
| Atorvastatin Calcium | 75 |
| Losartan Potassium | 72 |
| Brilinta Ticagrelor | 68 |
| Jardiance Empagliflozin | 64 |
* Counts below 11 are suppressed by CMS for patient privacy. Generic names shown where available from CMS Part D data.
Cardiovascular Disease Physician Overview
How Ho-Hin Choy, M.D. fits within the Cardiovascular Disease Physician landscape nationally.
25,298
Cardiovascular Disease Physician Providers in US
54
States with Cardiovascular Disease Physician
3,149
Avg Claims per Provider
Ho-Hin Choy, M.D.'s 1,687 claims are below the specialty average of 3,149.
Nationwide Cardiovascular Disease Physician peers with similar MIPS or enrollment year
Two federal-record peer sets for Choy, both outside California so the neighborhoods are not geographic containment.
Same NPPES enumeration year (2015)
Same-specialty clinicians who entered the NPI registry in the same calendar year, outside this state.
Nearby Cardiovascular Disease Physician Providers in California
Other clinicians with the same primary specialty enrolled in California, drawn from the same CMS NPPES roster as Choy.
One of 2,322 Cardiovascular Disease Physician providers enrolled in California, 11 are shown on this page.
Mohammad Abid
MD FACC
Indio, CA
Dr. Georges Abou Rjaili
MD
Riverside, CA
Dr. Maria Abraham
M.D.
San Francisco, CA
Dr. Theodore Abraham
M.D.
San Francisco, CA
David Abrahamson
MD. FACC.
Laguna Beach, CA
Compare Cardiovascular Disease Physician nationally: see state-by-state distribution →
Frequently Asked Questions
What is Ho-Hin Choy, M.D.'s specialty? ▼
Ho-Hin Choy, M.D. specializes in Cardiovascular Disease Physician and practices in Fairfield, California. Credentials: M.D..
How much does Ho-Hin Choy, M.D. prescribe under Medicare Part D? ▼
In 2024, Ho-Hin Choy, M.D. wrote 1,687 Medicare Part D claims totaling $331K in drug costs for 355 beneficiaries.
Where is Ho-Hin Choy, M.D. located? ▼
Ho-Hin Choy, M.D. is located at 2458 HILBORN RD, Fairfield, CA, 94534. Phone: (707) 646-4400.
What is Ho-Hin Choy, M.D.'s NPI number? ▼
Ho-Hin Choy, M.D.'s National Provider Identifier (NPI) is 1083008262, issued on 03/25/2015.
Does Ho-Hin Choy, M.D. prescribe more brand-name or generic drugs? ▼
Ho-Hin Choy, M.D.'s prescribing is 23% brand-name and 77% generic drugs by claim count, with $315K in brand drug costs.
How many Cardiovascular Disease Physician providers are there in the US? ▼
There are 25,298 Cardiovascular Disease Physician providers across 54 states in the US. The average Cardiovascular Disease Physician provider writes 3,149 Medicare Part D claims per year.
What drugs does Ho-Hin Choy, M.D. prescribe most often? ▼
Based on 2024 Medicare Part D data, Ho-Hin Choy, M.D.'s most frequently prescribed drugs include Metoprolol Succinate, Furosemide, Eliquis. This reflects Medicare Part D prescriptions only and does not include commercial insurance or other payer types.
Does Ho-Hin Choy, M.D. accept Medicare? ▼
Ho-Hin Choy, M.D. appears in CMS Medicare data with 1,687 Part D claims and 355 Medicare beneficiaries in 2024. Contact the provider's office directly to confirm current Medicare enrollment and accepted plans.
How can I verify Ho-Hin Choy, M.D.'s credentials? ▼
Ho-Hin Choy, M.D.'s NPI is 1083008262 with credentials M.D.. 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 (2024). 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 August 2026 (NPPES) / 2024 (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 August 2026.