NPI registry status
Active
2026 NPPES data Cardiovascular Disease Physician NPI 1134202658 MD
Verify on CMS → Byron J Allen, MD
Cardiovascular Disease Physician in Orange, 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
3K
Medicare Part D claims · 273 beneficiaries · Cardiovascular Disease Physician avg: 3K
Generic prescribing
86%
generic claims · 14% brand-name · higher generic rates reduce patient out-of-pocket costs
MIPS score
100/100
▲ 17 pts above national avg 83.5 · Exceptional
Source: CMS Medicare Part D Prescriber Public Use File, 2023
What the federal data shows
Byron J Allen, MD reported a CMS MIPS final score of 100/100 - above the 83.5 national average - and filed 2,819 Medicare Part D claims in 2023.
- 100/100
- MIPS score · +17 vs avg
- 3K
- Part D claims, 2023
- 86%
- generic prescribing
- Likely
- board-certified (heuristic)
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 Byron J Allen, MD
Federal records show an active NPI with both Medicare prescribing volume and a measured CMS quality score — objective registry data, not patient reviews.
- Verified
NPI registry status
Active listing in the CMS National Provider Identifier Registry (NPI 1134202658), first enumerated 10/21/2006.
Source: CMS NPPES
- Reported
Medicare Part D participation
Filed 2,819 Medicare Part D prescription claims in the 2023 CMS public use file — indicates active Medicare prescribing participation.
Source: CMS Part D Prescriber PUF
- Reported
CMS quality reporting (MIPS)
Reported a CMS MIPS final score of 100/100 in the Quality Payment Program — a federal quality measure, not a patient review.
Source: CMS Quality Payment Program
- 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
1 CMS Care Compare hospital affiliation on record — practice footprint from the Doctors and Clinicians file.
Source: CMS Care Compare
- State context
State board disciplinary context
California statewide board action statistics are published annually — these figures describe aggregate state activity, not Byron J Allen, MD'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.
CMS NPPES provider registry desk
NPI 1134202658 · Cardiovascular Disease Physician
NPI-10 · ENUM-LEGACY · TAX-MID · MIPS-ELITE · RX-MID · BOOK-LIGHT · PHOTO-FINISH
- NPI-10 1134202658
- ENUM-LEGACY 2006
- TAX-MID 25K Cardiovascular Disease
- MIPS-ELITE 100/100
- RX-MID 2,819
- BOOK-LIGHT 2,322 in California
- PHOTO-FINISH Sudhir Agarwal · ±0.0
MIPS final-score neighbourhood
Same-specialty nationwide peers by CMS final score, not geographic proximity
- Allen · this pro…
Allen · this provider
100 MIPS pts
- Martin Bilsker ·…
Martin Bilsker
100 MIPS pts
- Sudhir Agarwal ·…
Sudhir Agarwal
100 MIPS pts
- Issam Al-Bitar ·…
Issam Al-Bitar
100 MIPS pts
- Antonio Barquet …
Antonio Barquet
100 MIPS pts
What this shows Nearest measured MIPS peers for this NUCC specialty (2023 performance year).
Byron J Allen, MD's MIPS score vs every measured U.S. clinician
CMS Merit-based Incentive Payment System (MIPS) final score, 2023, the federal quality measure. Clinicians whose score CMS assigned without scoring any category are excluded.
100 ≥ 92nd percentile 92% of 454,083 measured providers are in lower value bands
Each bar is a band; taller bars hold more measured 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.
The percentile is a conservative whole-score-point band: it counts only measured clinicians in lower score bands. A CMS MIPS metric is not a recommendation or a clinical-quality rating by PlainDoctor. See methodology § corpus placement.
Source CMS Merit-based Incentive Payment System (MIPS) · 2023
Where Byron J Allen, MD sits
This provider among cardiovascular disease physician peers
Across the 7,999 cardiovascular disease physician providers who report both Medicare Part D prescribing and a MIPS quality score, Byron J Allen, MD writes more Part D claims than 50% of them and scores higher on MIPS quality than 91% - placing this provider in the high-volume, high-quality quadrant. Volume reflects patient-panel size and specialty, not quality; the two axes are independent.
Each dot is one cardiovascular disease physician peer from a representative sample of 60; the gold marker is Byron J Allen, MD. Source: CMS Medicare Part D Prescriber data and the CMS Merit-based Incentive Payment System, 2023.
✓
Board certification likely (heuristic, not verified)
Byron J Allen, MD practices in an ABMS-board-eligible specialty and shows active CMS Medicare participation + MIPS quality reporting + 1 hospital affiliation - 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 Byron J Allen, MD?
High performer (top quartile)Primary specialty
Cardiovascular Disease Physician
Medicare Part D claims
2,819 5% vs specialty avg
MIPS final score
100/100 16.5 pts vs avg
Specialty distribution in California
How Cardiovascular Disease Physician compares to other specialties among California providers
Medicare quality performance, MIPS
Byron J Allen, MD's 2023 MIPS final score plotted against the Cardiovascular Disease Physician national average
- MIPS Final Score
- 100/100
- vs 83.5 national avg · 2023 performance year
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 | 1134202658 |
|---|---|
| Specialty | Cardiovascular Disease Physician |
| Credentials | MD |
| Gender | Male |
| NPI Issued | 10/21/2006 |
CMS Quality Score (MIPS)
Merit-based Incentive Payment System (MIPS) scores from CMS, 2023 performance year.
100
Final Score
Measured-score avg: 83.5
82.4039
Quality
100
Promoting Interoperability
Reporting: Alternative Payment Model
Hospital and facility affiliations
Facilities where Byron J Allen, MD 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.
UC Regents
Orange, 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).
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 Byron J Allen, MD. To verify Byron J Allen, MD'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
Byron J Allen, MD - brand share 14.0%
Cardiovascular Disease Physician average
14% brand-name claims vs 86% generic, on 2,819 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.
2,819
Total Claims
$580K
Total Drug Cost
273
Medicare Beneficiaries
Prescribing Breakdown
- 30-Day Fills
- 7,935.83
- Total Day Supply
- 237,225
- Brand vs Generic
- 14% brand / 86% generic
- Brand Drug Cost
- $493K
- Generic Drug Cost
- $87K
Patient Demographics
- Average Patient Age
- 79.1 years
- Avg HCC Risk Score
- 1.50
- Gender Split
- 38% female / 62% male
Top Prescribed Drugs (Medicare Part D)
Top drugs by claim count for calendar year 2023. Based on Medicare Part D data only.
What Byron J Allen, MD prescribes most
Top Medicare Part D drugs by claim count, 2023
- Atorvastatin Calcium
Atorvastatin Calcium
356 claims
- Amlodipine Besylate
Amlodipine Besylate
188 claims
- Eliquis
Eliquis
155 claims
- Metoprolol Succinate
Metoprolol Succinate
149 claims
- Rosuvastatin Calcium
Rosuvastatin Calcium
146 claims
- Ezetimibe 135
Ezetimibe
135 claims
- Carvedilol 120
Carvedilol
120 claims
- Losartan Potassium 118
Losartan Potassium
118 claims
| Drug | Claims |
|---|---|
| Atorvastatin Calcium | 356 |
| Amlodipine Besylate | 188 |
| Eliquis Apixaban | 155 |
| Metoprolol Succinate | 149 |
| Rosuvastatin Calcium | 146 |
| Ezetimibe | 135 |
| Carvedilol | 120 |
| Losartan Potassium | 118 |
| Valsartan | 104 |
| Clopidogrel Clopidogrel Bisulfate | 103 |
* 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 Byron J Allen, MD fits within the Cardiovascular Disease Physician landscape nationally.
25,298
Cardiovascular Disease Physician Providers in US
54
States with Cardiovascular Disease Physician
2,963
Avg Claims per Provider
Byron J Allen, MD's 2,819 claims are below the specialty average of 2,963.
Nationwide Cardiovascular Disease Physician peers with similar MIPS or enrollment year
Two federal-record peer sets for Allen, both outside California so the neighborhoods are not geographic containment.
Similar MIPS final score
Nearest same-specialty clinicians by CMS MIPS final score (100 here).
Same NPPES enumeration year (2006)
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 Allen.
One of 2,322 Cardiovascular Disease Physician providers enrolled in California, 5 are shown here.
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
Compare Cardiovascular Disease Physician nationally: see state-by-state distribution →
Frequently Asked Questions
What is Byron J Allen, MD's specialty? ▼
Byron J Allen, MD specializes in Cardiovascular Disease Physician and practices in Orange, California. Credentials: MD.
How much does Byron J Allen, MD prescribe under Medicare Part D? ▼
In 2023, Byron J Allen, MD wrote 2,819 Medicare Part D claims totaling $580K in drug costs for 273 beneficiaries.
What is Byron J Allen, MD's Medicare quality score? ▼
Byron J Allen, MD has a CMS MIPS Final Score of 100/100 (Quality: 82.4). The average MIPS Final Score across the 454,083 clinicians with at least one published category score is 83.5; clinicians whose score CMS assigned without scoring any category are excluded from that average. Source: CMS Merit-based Incentive Payment System (MIPS) 2023.
Where is Byron J Allen, MD located? ▼
Byron J Allen, MD is located at UCI MEDICAL CENTER, Orange, CA, 92868. Phone: (714) 456-2986.
What is Byron J Allen, MD's NPI number? ▼
Byron J Allen, MD's National Provider Identifier (NPI) is 1134202658, issued on 10/21/2006.
Does Byron J Allen, MD prescribe more brand-name or generic drugs? ▼
Byron J Allen, MD's prescribing is 14% brand-name and 86% generic drugs by claim count, with $493K 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 2,963 Medicare Part D claims per year.
What drugs does Byron J Allen, MD prescribe most often? ▼
Based on 2023 Medicare Part D data, Byron J Allen, MD's most frequently prescribed drugs include Atorvastatin Calcium, Amlodipine Besylate, Eliquis. This reflects Medicare Part D prescriptions only and does not include commercial insurance or other payer types.
Does Byron J Allen, MD accept Medicare? ▼
Byron J Allen, MD appears in CMS Medicare data with 2,819 Part D claims and 273 Medicare beneficiaries in 2023. Contact the provider's office directly to confirm current Medicare enrollment and accepted plans.
How can I verify Byron J Allen, MD's credentials? ▼
Byron J Allen, MD's NPI is 1134202658 with credentials MD. 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 August 2026.