NPI registry status
Active
2026 NPPES data Allergy & Immunology Physician NPI 1043449788 M.D., PH.D.
Verify on CMS → Sanny Chan, M.D., PH.D.
Allergy & Immunology Physician in Santa Monica, 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
953
Medicare Part D claims · 184 beneficiaries · Allergy & Immunology Physician avg: 764
Generic prescribing
69%
generic claims · 31% brand-name · higher generic rates reduce patient out-of-pocket costs
MIPS score
21.3/100
▼ 62 pts below national avg 83.1 · Below average
Industry payments
$2.3K
103 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
Sanny Chan, M.D., PH.D. reported a CMS MIPS final score of 21.3/100 - below the 83.1 national average - and filed 953 Medicare Part D claims in 2023.
- 21.3/100
- MIPS score · -62 vs avg
- 953
- Part D claims, 2023
- 69%
- 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.
Sanny Chan, M.D., PH.D.'s MIPS score vs every scored U.S. clinician
CMS Merit-based Incentive Payment System (MIPS) final score, 2023, the federal quality measure
21 3rd percentile higher than 3% 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 Sanny Chan, M.D., PH.D. 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, Sanny Chan, M.D., PH.D. writes more Part D claims than 59% of them and scores higher on MIPS quality than 5% - 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 allergy & immunology physician peer from a representative sample of 60; the gold marker is Sanny Chan, M.D., PH.D.. Source: CMS Medicare Part D Prescriber data and the CMS Merit-based Incentive Payment System, 2023.
✓
Board certification likely (heuristic, not verified)
Sanny Chan, M.D., PH.D. 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 Sanny Chan, M.D., PH.D.?
Below national averagePrimary specialty
Allergy & Immunology Physician
Medicare Part D claims
953 25% vs specialty avg
MIPS final score
21.3/100 61.8 pts vs avg
Specialty distribution in California
How Allergy & Immunology Physician compares to other specialties among California providers
Medicare quality performance, MIPS
Sanny Chan, M.D., PH.D.'s 2023 MIPS final score plotted against the Allergy & Immunology Physician national average
- MIPS Final Score
- 21.3/100
- vs 83.1 national avg · 2023 performance year
MIPS final score (Allergy & Immunology Physician) - 21.3/100 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).
Sanny Chan, M.D., PH.D. appears in the CMS NPPES registry as a Allergy & Immunology Physician provider holding M.D., PH.D. credentials at 1301 20TH ST STE 220, Santa Monica, CA, 90404, with a listed phone of (310) 401-1434. NPI 1043449788 was issued on 07/02/2009.
Medicare Part D records for calendar year 2023 show 953 prescription claims written by this provider, covering 184 Medicare beneficiaries and totaling roughly $836K in drug spend, split 31% brand-name and 69% generic by claim count. On the CMS Merit-based Incentive Payment System, this provider earned a Final Score of 21.3/100 for the 2023 performance year (Quality 0, Cost 71.1), 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 | 1043449788 |
|---|---|
| Specialty | Allergy & Immunology Physician |
| Credentials | M.D., PH.D. |
| Gender | Male |
| NPI Issued | 07/02/2009 |
CMS Quality Score (MIPS)
Merit-based Incentive Payment System (MIPS) scores from CMS, 2023 performance year.
21.3405
Final Score
Avg: 83.1
0
Quality
71.135
Cost
Reporting: Individual
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 Sanny Chan, M.D., PH.D.. Source: openpaymentsdata.cms.gov.
Total received
$2.3K
Largest payer
AstraZeneca Pharmaceuticals LP
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 Sanny Chan, M.D., PH.D.. To verify Sanny Chan, M.D., PH.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 · Above average
Sanny Chan, M.D., PH.D. - brand share 31.0%
Allergy & Immunology Physician average
31% brand-name claims vs 69% generic, on 953 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.
953
Total Claims
$836K
Total Drug Cost
184
Medicare Beneficiaries
Prescribing Breakdown
- 30-Day Fills
- 1,757
- Total Day Supply
- 50,184
- Brand vs Generic
- 31% brand / 69% generic
- Brand Drug Cost
- $727K
- Generic Drug Cost
- $109K
- Antibiotic Claims
- 26
Patient Demographics
- Average Patient Age
- 75.4 years
- Avg HCC Risk Score
- 0.95
- Gender Split
- 65% female / 35% male
Top Prescribed Drugs (Medicare Part D)
Top drugs by claim count for calendar year 2023. Based on Medicare Part D data only.
What Sanny Chan, M.D., PH.D. prescribes most
Top Medicare Part D drugs by claim count, 2023
- Montelukast Sodium
Montelukast Sodium
205 claims
- Ipratropium Bromide
Ipratropium Bromide
98 claims
- Azelastine Hcl 78
Azelastine Hcl
78 claims
- Trelegy Ellipta 50
Trelegy Ellipta
50 claims
- Albuterol Sulfate … 42
Albuterol Sulfate Hfa
42 claims
- Fluticasone Propio… 42
Fluticasone Propionate
42 claims
- Epinephrine 39
Epinephrine
39 claims
- Breo Ellipta 37
Breo Ellipta
37 claims
| Drug | Claims |
|---|---|
| Montelukast Sodium | 205 |
| Ipratropium Bromide | 98 |
| Azelastine Hcl | 78 |
| Trelegy Ellipta Fluticasone/Umeclidin/Vilanter | 50 |
| Albuterol Sulfate Hfa Albuterol Sulfate | 42 |
| Fluticasone Propionate | 42 |
| Epinephrine | 39 |
| Breo Ellipta Fluticasone/Vilanterol | 37 |
| Levocetirizine Dihydrochloride | 29 |
| Cromolyn Sodium | 25 |
* 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 Sanny Chan, M.D., PH.D. 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
Sanny Chan, M.D., PH.D.'s 953 claims are above 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 Chan.
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 Sanny Chan, M.D., PH.D.'s specialty? ▼
Sanny Chan, M.D., PH.D. specializes in Allergy & Immunology Physician and practices in Santa Monica, California. Credentials: M.D., PH.D..
How much does Sanny Chan, M.D., PH.D. prescribe under Medicare Part D? ▼
In 2023, Sanny Chan, M.D., PH.D. wrote 953 Medicare Part D claims totaling $836K in drug costs for 184 beneficiaries.
What is Sanny Chan, M.D., PH.D.'s Medicare quality score? ▼
Sanny Chan, M.D., PH.D. has a CMS MIPS Final Score of 21.3/100 (Quality: 0, Cost: 71.1). The national average MIPS Final Score is 83.1. Source: CMS Merit-based Incentive Payment System (MIPS) 2023.
Where is Sanny Chan, M.D., PH.D. located? ▼
Sanny Chan, M.D., PH.D. is located at 1301 20TH ST STE 220, Santa Monica, CA, 90404. Phone: (310) 401-1434.
What is Sanny Chan, M.D., PH.D.'s NPI number? ▼
Sanny Chan, M.D., PH.D.'s National Provider Identifier (NPI) is 1043449788, issued on 07/02/2009.
Does Sanny Chan, M.D., PH.D. prescribe more brand-name or generic drugs? ▼
Sanny Chan, M.D., PH.D.'s prescribing is 31% brand-name and 69% generic drugs by claim count, with $727K 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 Sanny Chan, M.D., PH.D. prescribe most often? ▼
Based on 2023 Medicare Part D data, Sanny Chan, M.D., PH.D.'s most frequently prescribed drugs include Montelukast Sodium, Ipratropium Bromide, Azelastine Hcl. This reflects Medicare Part D prescriptions only and does not include commercial insurance or other payer types.
Does Sanny Chan, M.D., PH.D. accept Medicare? ▼
Sanny Chan, M.D., PH.D. appears in CMS Medicare data with 953 Part D claims and 184 Medicare beneficiaries in 2023. Contact the provider's office directly to confirm current Medicare enrollment and accepted plans.
How can I verify Sanny Chan, M.D., PH.D.'s credentials? ▼
Sanny Chan, M.D., PH.D.'s NPI is 1043449788 with credentials M.D., PH.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 (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.