NPI registry status
Active
2026 NPPES data Allergy & Immunology Physician NPI 1497190714 MD
Verify on CMS → Meng Chen, MD
Allergy & Immunology Physician in Stanford, 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 3,390 in Allergy & Immunology 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
186
Medicare Part D claims · 38 beneficiaries · Allergy & Immunology Physician avg: 764
Generic prescribing
67%
generic claims · 33% brand-name · higher generic rates reduce patient out-of-pocket costs
MIPS score
76.5/100
▼ 7 pts below national avg 83.1 · Above neutral
Industry payments
$130.05
4 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
Meng Chen, MD reported a CMS MIPS final score of 76.5/100 - below the 83.1 national average - and filed 186 Medicare Part D claims in 2023.
- 76.5/100
- MIPS score · -7 vs avg
- 186
- Part D claims, 2023
- 67%
- 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.
Meng Chen, MD's MIPS score vs every scored U.S. clinician
CMS Merit-based Incentive Payment System (MIPS) final score, 2023, the federal quality measure
77 21st percentile higher than 21% of 477,587 scored providers
Each bar is a band; taller bars hold more scored 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.
Source CMS Merit-based Incentive Payment System (MIPS) · 2023
Where Meng Chen, MD sits
This provider among allergy & immunology physician peers
Across the 740 allergy & immunology physician providers who report both Medicare Part D prescribing and a MIPS quality score, Meng Chen, MD writes more Part D claims than 12% of them and scores higher on MIPS quality than 42% - placing this provider in the lower-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 allergy & immunology physician peer from a representative sample of 60; the gold marker is Meng Chen, MD. Source: CMS Medicare Part D Prescriber data and the CMS Merit-based Incentive Payment System, 2023.
✓
Board certification likely (heuristic, not verified)
Meng Chen, 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 Meng Chen, MD?
Below national averagePrimary specialty
Allergy & Immunology Physician
Medicare Part D claims
186 76% vs specialty avg
MIPS final score
76.5/100 6.6 pts vs avg
Specialty distribution in California
How Allergy & Immunology Physician compares to other specialties among California providers
Medicare quality performance, MIPS
Meng Chen, MD's 2023 MIPS final score plotted against the Allergy & Immunology Physician national average
- MIPS Final Score
- 76.5/100
- vs 83.1 national avg · 2023 performance year
MIPS final score (Allergy & Immunology Physician) - 76.5/100 vs national avg 83.1
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).
Meng Chen, MD appears in the CMS NPPES registry as a Allergy & Immunology Physician provider holding MD credentials at 300 PASTEUR DR, Stanford, CA, 94305, with a listed phone of (650) 723-4000. NPI 1497190714 was issued on 04/30/2013.
Medicare Part D records for calendar year 2023 show 186 prescription claims written by this provider, covering 38 Medicare beneficiaries and totaling roughly $208K in drug spend, split 33% brand-name and 67% generic by claim count. On the CMS Merit-based Incentive Payment System, this provider earned a Final Score of 76.5/100 for the 2023 performance year (Quality 74.3, Cost 44), compared with the national average of 83.1.
Allergy & Immunology Physician is a narrow specialty nationwide, with 3,390 enrolled providers across 52 states and an average of 764 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 | 1497190714 |
|---|---|
| Specialty | Allergy & Immunology Physician |
| Credentials | MD |
| Gender | Female |
| NPI Issued | 04/30/2013 |
CMS Quality Score (MIPS)
Merit-based Incentive Payment System (MIPS) scores from CMS, 2023 performance year.
76.5025
Final Score
Avg: 83.1
74.3195
Quality
43.9595
Cost
100
Promoting Interoperability
Reporting: Group practice
Hospital and facility affiliations
Facilities where Meng Chen, 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.
Stanford Health Care
★★★★★ 5/5
Stanford, CA
Acute Care Hospitals
CMS CCN: 050441
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 Meng Chen, MD. Source: openpaymentsdata.cms.gov.
Total received
$130
Largest payer
GENZYME CORPORATION
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 Meng Chen, MD. To verify Meng Chen, 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 · Above average
Meng Chen, MD - brand share 33.0%
Allergy & Immunology Physician average
33% brand-name claims vs 67% generic, on 186 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.
186
Total Claims
$208K
Total Drug Cost
38
Medicare Beneficiaries
Prescribing Breakdown
- 30-Day Fills
- 257
- Total Day Supply
- 7,354
- Brand vs Generic
- 33% brand / 67% generic
- Brand Drug Cost
- $204K
- Generic Drug Cost
- $4K
Patient Demographics
- Average Patient Age
- 69.4 years
- Avg HCC Risk Score
- 1.93
- Gender Split
- 63% female / 37% male
Top Prescribed Drugs (Medicare Part D)
Top drugs by claim count for calendar year 2023. Based on Medicare Part D data only.
What Meng Chen, MD prescribes most
Top Medicare Part D drugs by claim count, 2023
- Azelastine Hcl
Azelastine Hcl
39 claims
- Fluticasone Propio…
Fluticasone Propionate
32 claims
- Montelukast Sodium
Montelukast Sodium
19 claims
- Ipratropium Bromide
Ipratropium Bromide
16 claims
- Famotidine 13
Famotidine
13 claims
- Dupixent Pen 12
Dupixent Pen
12 claims
- Epinephrine 11
Epinephrine
11 claims
- Nucala 11
Nucala
11 claims
| Drug | Claims |
|---|---|
| Azelastine Hcl | 39 |
| Fluticasone Propionate | 32 |
| Montelukast Sodium | 19 |
| Ipratropium Bromide | 16 |
| Famotidine | 13 |
| Dupixent Pen Dupilumab | 12 |
| Epinephrine | 11 |
| Nucala Mepolizumab | 11 |
* Counts below 11 are suppressed by CMS for patient privacy. Generic names shown where available from CMS Part D data.
Allergy & Immunology Physician Overview
How Meng Chen, MD fits within the Allergy & Immunology Physician landscape nationally.
3,390
Allergy & Immunology Physician Providers in US
52
States with Allergy & Immunology Physician
764
Avg Claims per Provider
Meng Chen, MD's 186 claims are below the specialty average of 764.
Nearby Allergy & Immunology Physician Providers in California
Other clinicians with the same primary specialty enrolled in California, drawn from the same CMS NPPES roster as Chen.
Dr. Seema Aceves
M.D., PH.D.
San Diego, CA
Dr. Daniel Adelman
M.D.
San Francisco, CA
Dr. Rhonda Alkatib
M.D.
San Diego, CA
Dr. Mercedes Amado
M.D.
San Diego, CA
Dr. Loula Amin
M.D.
Newport Beach, CA
Compare Allergy & Immunology 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 Allergy & Immunology 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 Meng Chen, MD's specialty? ▼
Meng Chen, MD specializes in Allergy & Immunology Physician and practices in Stanford, California. Credentials: MD.
How much does Meng Chen, MD prescribe under Medicare Part D? ▼
In 2023, Meng Chen, MD wrote 186 Medicare Part D claims totaling $208K in drug costs for 38 beneficiaries.
What is Meng Chen, MD's Medicare quality score? ▼
Meng Chen, MD has a CMS MIPS Final Score of 76.5/100 (Quality: 74.3, Cost: 44). The national average MIPS Final Score is 83.1. Source: CMS Merit-based Incentive Payment System (MIPS) 2023.
Where is Meng Chen, MD located? ▼
Meng Chen, MD is located at 300 PASTEUR DR, Stanford, CA, 94305. Phone: (650) 723-4000.
What is Meng Chen, MD's NPI number? ▼
Meng Chen, MD's National Provider Identifier (NPI) is 1497190714, issued on 04/30/2013.
Does Meng Chen, MD prescribe more brand-name or generic drugs? ▼
Meng Chen, MD's prescribing is 33% brand-name and 67% generic drugs by claim count, with $204K in brand drug costs.
How many Allergy & Immunology Physician providers are there in the US? ▼
There are 3,390 Allergy & Immunology Physician providers across 52 states in the US. The average Allergy & Immunology Physician provider writes 764 Medicare Part D claims per year.
What drugs does Meng Chen, MD prescribe most often? ▼
Based on 2023 Medicare Part D data, Meng Chen, MD's most frequently prescribed drugs include Azelastine Hcl, Fluticasone Propionate, Montelukast Sodium. This reflects Medicare Part D prescriptions only and does not include commercial insurance or other payer types.
Does Meng Chen, MD accept Medicare? ▼
Meng Chen, MD appears in CMS Medicare data with 186 Part D claims and 38 Medicare beneficiaries in 2023. Contact the provider's office directly to confirm current Medicare enrollment and accepted plans.
How can I verify Meng Chen, MD's credentials? ▼
Meng Chen, MD's NPI is 1497190714 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
Compiled from official public sources by the PlainDoctor editorial team.