NPI registry status
Active
2026 NPPES data Internal Medicine Physician NPI 1528034154 MB BCHIR
Verify on CMS → Xin Yang, MB BCHIR
Internal Medicine Physician in Berkeley, 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 172,737 in Internal 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
1K
Medicare Part D claims · 161 beneficiaries · Internal Medicine Physician avg: 3K
Generic prescribing
89%
generic claims · 11% brand-name · higher generic rates reduce patient out-of-pocket costs
MIPS score
82.4/100
▼ 1 pts below national avg 83.5 · Above neutral
Industry payments
$864.11
19 payments · CMS Open Payments (Sunshine Act)
Source: CMS Medicare Part D Prescriber Public Use File, 2023
What the federal data shows
Xin Yang, MB BCHIR reported a CMS MIPS final score of 82.4/100 - below the 83.5 national average - and filed 1,226 Medicare Part D claims in 2023.
- 82.4/100
- MIPS score · -1 vs avg
- 1K
- Part D claims, 2023
- 89%
- 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.
Xin Yang, MB BCHIR'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.
82 ≥ 36th percentile 36% 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 Xin Yang, MB BCHIR sits
This provider among internal medicine physician peers
Across the 34,612 internal medicine physician providers who report both Medicare Part D prescribing and a MIPS quality score, Xin Yang, MB BCHIR writes more Part D claims than 59% of them and scores higher on MIPS quality than 36% - placing this provider in the high-volume, lower-quality quadrant. Volume reflects patient-panel size and specialty, not quality; the two axes are independent.
Part D claim volume vs MIPS quality, by specialty percentile
Each dot is one internal medicine physician peer from a representative sample of 60; the gold marker is Xin Yang, MB BCHIR. Source: CMS Medicare Part D Prescriber data and the CMS Merit-based Incentive Payment System, 2023.
✓
Board certification likely (heuristic, not verified)
Xin Yang, MB BCHIR practices in an ABMS-board-eligible specialty and shows active CMS Medicare participation + MIPS quality reporting + 3 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 Xin Yang, MB BCHIR?
Near national averagePrimary specialty
Internal Medicine Physician
Medicare Part D claims
1,226 55% vs specialty avg
MIPS final score
82.4/100 1.1 pts vs avg
Specialty distribution in California
How Internal Medicine Physician compares to other specialties among California providers
Medicare quality performance, MIPS
Xin Yang, MB BCHIR's 2023 MIPS final score plotted against the Internal Medicine Physician national average
- MIPS Final Score
- 82.4/100
- vs 83.5 national avg · 2023 performance year
MIPS final score (Internal Medicine Physician) - 82.4/100 vs national avg 83.5
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).
Xin Yang, MB BCHIR appears in the CMS NPPES registry as an Internal Medicine Physician provider holding MB BCHIR credentials at 2450 ASHBY AVE, Berkeley, CA, 94705, with a listed phone of (510) 204-4444. NPI 1528034154 was issued on 02/24/2006.
Medicare Part D records for calendar year 2023 show 1,226 prescription claims written by this provider, covering 161 Medicare beneficiaries and totaling roughly $204K in drug spend, split 11% brand-name and 89% generic by claim count. On the CMS Merit-based Incentive Payment System, this provider earned a Final Score of 82.4/100 for the 2023 performance year (Quality 63, Cost 64.3), compared with the 83.5 average among clinicians with a measured score.
Internal Medicine Physician is a high-volume specialty nationwide, with 172,737 enrolled providers across 56 states and an average of 2,716 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 | 1528034154 |
|---|---|
| Specialty | Internal Medicine Physician |
| Credentials | MB BCHIR |
| Gender | Male |
| NPI Issued | 02/24/2006 |
CMS Quality Score (MIPS)
Merit-based Incentive Payment System (MIPS) scores from CMS, 2023 performance year.
82.3993
Final Score
Measured-score avg: 83.5
63.0266
Quality
64.3183
Cost
Reporting: Group practice
Hospital and facility affiliations
Facilities where Xin Yang, MB BCHIR 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.
According to CMS billing records, Xin Yang, MB BCHIR is affiliated with 3 Medicare-billing facilities.
Alameda Health System
Oakland, CA
Berkeley Cardiovascular Medical Group
Orinda, CA
Sutter Bay Medical Foundation
Berkeley, 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 Xin Yang, MB BCHIR. Source: openpaymentsdata.cms.gov.
Total received
$864
Largest payer
ShockWave Medical, 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 Xin Yang, MB BCHIR. To verify Xin Yang, MB BCHIR'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
Xin Yang, MB BCHIR - brand share 11.0%
Internal Medicine Physician average
11% brand-name claims vs 89% generic, on 1,226 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.
1,226
Total Claims
$204K
Total Drug Cost
161
Medicare Beneficiaries
Prescribing Breakdown
- 30-Day Fills
- 3,277
- Total Day Supply
- 98,004
- Brand vs Generic
- 11% brand / 89% generic
- Brand Drug Cost
- $162K
- Generic Drug Cost
- $42K
Patient Demographics
- Average Patient Age
- 73.3 years
- Avg HCC Risk Score
- 1.98
- Gender Split
- 29% female / 71% male
- Age Distribution
- <65: 16, 65-74: 80, 75-84: 46, 85+: 19
Top Prescribed Drugs (Medicare Part D)
Top drugs by claim count for calendar year 2023. Based on Medicare Part D data only.
What Xin Yang, MB BCHIR prescribes most
Top Medicare Part D drugs by claim count, 2023
- Atorvastatin Calcium
Atorvastatin Calcium
189 claims
- Metoprolol Succinate
Metoprolol Succinate
142 claims
- Lisinopril
Lisinopril
85 claims
- Clopidogrel
Clopidogrel
80 claims
- Losartan Potassium
Losartan Potassium
79 claims
- Furosemide 62
Furosemide
62 claims
- Amlodipine Besylate 50
Amlodipine Besylate
50 claims
- Carvedilol 44
Carvedilol
44 claims
| Drug | Claims |
|---|---|
| Atorvastatin Calcium | 189 |
| Metoprolol Succinate | 142 |
| Lisinopril | 85 |
| Clopidogrel Clopidogrel Bisulfate | 80 |
| Losartan Potassium | 79 |
| Furosemide | 62 |
| Amlodipine Besylate | 50 |
| Carvedilol | 44 |
| Spironolactone | 40 |
| Metoprolol Tartrate | 38 |
* Counts below 11 are suppressed by CMS for patient privacy. Generic names shown where available from CMS Part D data.
Internal Medicine Physician Overview
How Xin Yang, MB BCHIR fits within the Internal Medicine Physician landscape nationally.
172,737
Internal Medicine Physician Providers in US
56
States with Internal Medicine Physician
2,716
Avg Claims per Provider
Xin Yang, MB BCHIR's 1,226 claims are below the specialty average of 2,716.
Nearby Internal Medicine Physician Providers in California
Other clinicians with the same primary specialty enrolled in California, drawn from the same CMS NPPES roster as Yang.
Dr. Jacob Aaron
MD
San Francisco, CA
Dr. Alistair Aaronson
MD
Stanford, CA
Dr. Jose Abad.
MD
Sacramento, CA
Dr. Donna Abare
MD
Oakland, CA
Marce Abare
Scotts Valley, CA
Compare Internal Medicine Physician 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 Internal Medicine Physician 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 Xin Yang, MB BCHIR's specialty? ▼
Xin Yang, MB BCHIR specializes in Internal Medicine Physician and practices in Berkeley, California. Credentials: MB BCHIR.
How much does Xin Yang, MB BCHIR prescribe under Medicare Part D? ▼
In 2023, Xin Yang, MB BCHIR wrote 1,226 Medicare Part D claims totaling $204K in drug costs for 161 beneficiaries.
What is Xin Yang, MB BCHIR's Medicare quality score? ▼
Xin Yang, MB BCHIR has a CMS MIPS Final Score of 82.4/100 (Quality: 63, Cost: 64.3). 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 Xin Yang, MB BCHIR located? ▼
Xin Yang, MB BCHIR is located at 2450 ASHBY AVE, Berkeley, CA, 94705. Phone: (510) 204-4444.
What is Xin Yang, MB BCHIR's NPI number? ▼
Xin Yang, MB BCHIR's National Provider Identifier (NPI) is 1528034154, issued on 02/24/2006.
Does Xin Yang, MB BCHIR prescribe more brand-name or generic drugs? ▼
Xin Yang, MB BCHIR's prescribing is 11% brand-name and 89% generic drugs by claim count, with $162K in brand drug costs.
How many Internal Medicine Physician providers are there in the US? ▼
There are 172,737 Internal Medicine Physician providers across 56 states in the US. The average Internal Medicine Physician provider writes 2,716 Medicare Part D claims per year.
What drugs does Xin Yang, MB BCHIR prescribe most often? ▼
Based on 2023 Medicare Part D data, Xin Yang, MB BCHIR's most frequently prescribed drugs include Atorvastatin Calcium, Metoprolol Succinate, Lisinopril. This reflects Medicare Part D prescriptions only and does not include commercial insurance or other payer types.
Does Xin Yang, MB BCHIR accept Medicare? ▼
Xin Yang, MB BCHIR appears in CMS Medicare data with 1,226 Part D claims and 161 Medicare beneficiaries in 2023. Contact the provider's office directly to confirm current Medicare enrollment and accepted plans.
How can I verify Xin Yang, MB BCHIR's credentials? ▼
Xin Yang, MB BCHIR's NPI is 1528034154 with credentials MB BCHIR. 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 May 2026.