NPI registry status
Active
2026 NPPES data Family Medicine Physician NPI 1144424102 MD
Verify on CMS → Brian Bai, MD
Family Medicine Physician in Oxnard, 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 150,125 in Family Medicine 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
9K
Medicare Part D claims · 437 beneficiaries · Family Medicine Physician avg: 4K
Generic prescribing
85%
generic claims · 14% brand-name · higher generic rates reduce patient out-of-pocket costs
MIPS score
96.5/100
▲ 13 pts above national avg 83.5 · Exceptional
Industry payments
$69.95
4 payments · CMS Open Payments (Sunshine Act)
Source: CMS Medicare Part D Prescriber Public Use File, 2024
What the federal data shows
Brian Bai, MD reported a CMS MIPS final score of 96.5/100 - above the 83.5 national average - and filed 8,660 Medicare Part D claims in 2024.
- 96.5/100
- MIPS score · +13 vs avg
- 9K
- Part D claims, 2024
- 85%
- 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 Brian Bai, 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 1144424102), first enumerated 06/13/2007.
Source: CMS NPPES
- Reported
Medicare Part D participation
Filed 8,660 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 96.5/100 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
Industry payment transparency
$69.95 in reported industry payments (4 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 Brian Bai, MD's individual license status. Verify directly with the state medical board.
Source: Medical Board of California annual report FY 2022-23
- 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 Bai with other Family Medicine Physician providers
Same primary specialty, same federal CMS NPPES roster.
All 69 Family Medicine Physician providers in Oxnard, CA →
Also enrolled in California
- Dr. Omer Aba-Omer, MD Santa Monica, CA
- Dr. Michelle Ababa, MD Wilmington, CA
- Dr. Anna Tzeitel Abalos, MD Roseville, CA
- Dr. Adan Abarca, MD Anaheim, CA
- Dr. Vanessa Abarca, DO Ventura, CA
- Dr. Lorraine Abate, M.D. Sacramento, CA
Other specialties in Oxnard: Behavior Technician (243) · Case Manager/Care Coordinator (187) · Marriage & Family Therapist (185) · Addiction (Substance Use Disorder) Counselor (184)
CMS NPPES provider registry desk
NPI 1144424102 · Family Medicine Physician
NPI-10 · ENUM-MID · TAX-MEGA · MIPS-ELITE · RX-MID · BOOK-MID · PHOTO-FINISH
- NPI-10 1144424102
- ENUM-MID 2007
- TAX-MEGA 150K Family Medicine
- MIPS-ELITE 96.5/100
- RX-MID 8,660
- BOOK-MID 16,272 in California
- PHOTO-FINISH Wendy Cicek Steiger,… · ±0.0
MIPS final-score neighbourhood
Same-specialty nationwide peers by CMS final score, not geographic proximity
- Bai · this provi…
Bai · this provider
96.5 MIPS pts
- Josh Ostrue, D.O…
Josh Ostrue, D.O.
96.5 MIPS pts
- Wendy Cicek Stei…
Wendy Cicek Steiger, MD
96.5 MIPS pts
- Reyn Higa, MD · …
Reyn Higa, MD
96.5 MIPS pts
- Ryan Nicholas, M…
Ryan Nicholas, M.D.
96.5 MIPS pts
What this shows Nearest measured MIPS peers for this NUCC specialty (2023 performance year).
Brian Bai, 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.
97 ≥ 82nd percentile 82% 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 Brian Bai, MD sits
This provider among family medicine physician peers
Across the 21,266 family medicine physician providers who report both Medicare Part D prescribing and a MIPS quality score, Brian Bai, MD writes more Part D claims than 85% of them and scores higher on MIPS quality than 85% - 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 family medicine physician peer from a representative sample of 60; the gold marker is Brian Bai, MD. Source: CMS Medicare Part D Prescriber data and the CMS Merit-based Incentive Payment System, 2023.
✓
Board certification likely (heuristic, not verified)
Brian Bai, MD practices in an ABMS-board-eligible specialty and shows active CMS Medicare participation + MIPS quality reporting - 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 Brian Bai, MD?
High performer (top quartile)Primary specialty
Family Medicine Physician
Medicare Part D claims
8,660 146% vs specialty avg
MIPS final score
96.5/100 13 pts vs avg
Specialty distribution in California
How Family Medicine Physician compares to other specialties among California providers
Medicare quality performance, MIPS
Brian Bai, MD's 2023 MIPS final score plotted against the Family Medicine Physician national average
- MIPS Final Score
- 96.5/100
- 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 | 1144424102 |
|---|---|
| Specialty | Family Medicine Physician |
| Credentials | MD |
| Gender | Male |
| NPI Issued | 06/13/2007 |
CMS Quality Score (MIPS)
Merit-based Incentive Payment System (MIPS) scores from CMS, 2023 performance year.
96.5085
Final Score
Measured-score avg: 83.5
80.342
Quality
100
Promoting Interoperability
Reporting: Alternative Payment Model
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 Brian Bai, MD. Source: openpaymentsdata.cms.gov.
Total received
$70
Largest payer
Novo Nordisk 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 Medical Board of California, FY 2022-23
Aggregate state board data only, NOT a determination of any individual provider's status. The figures below describe statewide disciplinary activity across 148,769 California physician licenses in effect in FY 2022-23 - they are NOT specific to Brian Bai, MD. To verify Brian Bai, MD's current license status, use the state board's own license search (see California license lookup), or the Federation of State Medical Boards (FSMB) verification service.
374
Administrative board actions, California FY 2022-23
2.51
Actions per 1,000 physician licenses in effect
California statewide rate
Probation
Most common action type
148 actions
Source: Medical Board of California Annual Report 2022-2023, page 18 (licenses in effect: page 12). Full breakdown by action type on the California discipline page.
Brand vs generic prescribing mix · Typical
Brian Bai, MD - brand share 14.0%
Family Medicine Physician average
14% brand-name claims vs 85% generic, on 8,660 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.
8,660
Total Claims
$1.1M
Total Drug Cost
437
Medicare Beneficiaries
Prescribing Breakdown
- 30-Day Fills
- 20,541.7
- Total Day Supply
- 602,689
- Brand vs Generic
- 14% brand / 85% generic
- Brand Drug Cost
- $1.0M
- Generic Drug Cost
- $122K
- Opioid Claims
- 34 (0.4% rate)
- Antibiotic Claims
- 120
Patient Demographics
- Average Patient Age
- 75.1 years
- Avg HCC Risk Score
- 1.38
- Gender Split
- 50% female / 50% male
- Age Distribution
- <65: 16, 65-74: 216, 75-84: 140, 85+: 65
Top Prescribed Drugs (Medicare Part D)
Top drugs by claim count for calendar year 2024. Based on Medicare Part D data only.
What Brian Bai, MD prescribes most
Top Medicare Part D drugs by claim count, 2024
- Rosuvastatin Calcium
Rosuvastatin Calcium
669 claims
- Atorvastatin Calcium
Atorvastatin Calcium
466 claims
- Losartan Potassium
Losartan Potassium
372 claims
- Levothyroxine Sodium
Levothyroxine Sodium
315 claims
- Metformin Hcl
Metformin Hcl
311 claims
- Gabapentin 250
Gabapentin
250 claims
- Amlodipine Besylate 226
Amlodipine Besylate
226 claims
- Spironolactone 224
Spironolactone
224 claims
| Drug | Claims |
|---|---|
| Rosuvastatin Calcium | 669 |
| Atorvastatin Calcium | 466 |
| Losartan Potassium | 372 |
| Levothyroxine Sodium | 315 |
| Metformin Hcl | 311 |
| Gabapentin | 250 |
| Amlodipine Besylate | 226 |
| Spironolactone | 224 |
| Tamsulosin Hcl | 215 |
| Valsartan | 168 |
* Counts below 11 are suppressed by CMS for patient privacy. Generic names shown where available from CMS Part D data.
Family Medicine Physician Overview
How Brian Bai, MD fits within the Family Medicine Physician landscape nationally.
150,125
Family Medicine Physician Providers in US
56
States with Family Medicine Physician
3,519
Avg Claims per Provider
Brian Bai, MD's 8,660 claims are above the specialty average of 3,519.
Nationwide Family Medicine Physician peers with similar MIPS or enrollment year
Two federal-record peer sets for Bai, both outside California so the neighborhoods are not geographic containment.
Similar MIPS final score
Nearest same-specialty clinicians by CMS MIPS final score (96.5 here).
Same NPPES enumeration year (2007)
Same-specialty clinicians who entered the NPI registry in the same calendar year, outside this state.
Nearby Family Medicine Physician Providers in California
Other clinicians with the same primary specialty enrolled in California, drawn from the same CMS NPPES roster as Bai.
One of 16,272 Family Medicine Physician providers enrolled in California, 11 are shown on this page.
Dr. Robert Abatecola
MD
Castro Valley, CA
Dr. Romeo Abaya
M.D.
Cottonwood, CA
Dr. Effiem Abbah
MD, MPH
San Francisco, CA
Dr. Khuzeman Abbasi
MD
Santa Rosa, CA
Dr. Chad Abbott
MD
Aliso Viejo, CA
Compare Family Medicine Physician nationally: see state-by-state distribution →
Frequently Asked Questions
What is Brian Bai, MD's specialty? ▼
Brian Bai, MD specializes in Family Medicine Physician and practices in Oxnard, California. Credentials: MD.
How much does Brian Bai, MD prescribe under Medicare Part D? ▼
In 2024, Brian Bai, MD wrote 8,660 Medicare Part D claims totaling $1.1M in drug costs for 437 beneficiaries.
What is Brian Bai, MD's Medicare quality score? ▼
Brian Bai, MD has a CMS MIPS Final Score of 96.5/100 (Quality: 80.3). 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 Brian Bai, MD located? ▼
Brian Bai, MD is located at 331 S C ST, Oxnard, CA, 93030. Phone: (805) 247-1035.
What is Brian Bai, MD's NPI number? ▼
Brian Bai, MD's National Provider Identifier (NPI) is 1144424102, issued on 06/13/2007.
Does Brian Bai, MD prescribe more brand-name or generic drugs? ▼
Brian Bai, MD's prescribing is 14% brand-name and 85% generic drugs by claim count, with $1.0M in brand drug costs.
Does Brian Bai, MD prescribe opioids? ▼
Yes, Brian Bai, MD had 34 opioid claims in 2024 with an opioid prescribing rate of 0.4%.
How many Family Medicine Physician providers are there in the US? ▼
There are 150,125 Family Medicine Physician providers across 56 states in the US. The average Family Medicine Physician provider writes 3,519 Medicare Part D claims per year.
What drugs does Brian Bai, MD prescribe most often? ▼
Based on 2024 Medicare Part D data, Brian Bai, MD's most frequently prescribed drugs include Rosuvastatin Calcium, Atorvastatin Calcium, Losartan Potassium. This reflects Medicare Part D prescriptions only and does not include commercial insurance or other payer types.
Does Brian Bai, MD accept Medicare? ▼
Brian Bai, MD appears in CMS Medicare data with 8,660 Part D claims and 437 Medicare beneficiaries in 2024. Contact the provider's office directly to confirm current Medicare enrollment and accepted plans.
How can I verify Brian Bai, MD's credentials? ▼
Brian Bai, MD's NPI is 1144424102 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 (2024). 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 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 September 2026.