NPI registry status
Active
2026 NPPES data Advanced Heart Failure and Transplant Cardiology Physician NPI 1952475550 MD
Verify on CMS → Dana Weisshaar, MD
Advanced Heart Failure and Transplant Cardiology Physician in Los Gatos, 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 510 in Advanced Heart Failure and Transplant Cardiology 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
893
Medicare Part D claims · 178 beneficiaries · Advanced Heart Failure and Transplant Cardiology Physician avg: 2K
Industry payments
$378.37
10 payments · CMS Open Payments (Sunshine Act)
Compiled from official public sources by the PlainDoctor editorial team.
What the federal data shows
Dana Weisshaar, MD filed 893 Medicare Part D claims in 2023 as a Advanced Heart Failure and Transplant Cardiology Physician in Los Gatos, California.
- 893
- Part D claims, 2023
- 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.
Dana Weisshaar, MD's Medicare Part D volume vs every U.S. prescriber
Total Medicare Part D claims, 2023, across all CMS prescribers nationally
893 Top 27% higher than 73% of 1,370,886 prescribers
Each bar is a band; taller bars hold more prescribers. 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 Medicare Part D Prescriber Public Use File · 2023
✓
Board certification likely (heuristic, not verified)
Dana Weisshaar, MD practices in an ABMS-board-eligible specialty and shows active CMS Medicare participation + 2 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 Dana Weisshaar, MD?
Quality data not reportedPrimary specialty
Advanced Heart Failure and Transplant Cardiology Physician
Medicare Part D claims
893 49% vs specialty avg
Specialty distribution in California
How Advanced Heart Failure and Transplant Cardiology Physician compares to other specialties among California providers
Board certification
Not published by CMS
CMS does not publish a per-provider board-certification field in NPPES. PlainDoctor does not have a reliable per-specialty certification rate to show for Advanced Heart Failure and Transplant Cardiology Physician. Verify directly:
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).
Dana Weisshaar, MD appears in the CMS NPPES registry as a Advanced Heart Failure and Transplant Cardiology Physician provider holding MD credentials at 112 PEACH WILLOW CT, Los Gatos, CA, 95032, with a listed phone of (617) 286-6874. NPI 1952475550 was issued on 11/17/2006.
Medicare Part D records for calendar year 2023 show 893 prescription claims written by this provider, covering 178 Medicare beneficiaries and totaling roughly $748K in drug spend.
Advanced Heart Failure and Transplant Cardiology Physician is a narrow specialty nationwide, with 510 enrolled providers across 48 states and an average of 1,762 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 | 1952475550 |
|---|---|
| Specialty | Advanced Heart Failure and Transplant Cardiology Physician |
| Credentials | MD |
| Gender | Female |
| NPI Issued | 11/17/2006 |
Hospital and facility affiliations
Facilities where Dana Weisshaar, 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.
Empallo Medical Group, P.A.
Los Gatos, CA
Mohammed S Qayyum MD Inc
San Jose, 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 Dana Weisshaar, MD. Source: openpaymentsdata.cms.gov.
Total received
$378
Largest payer
Bayer Healthcare Pharmaceuticals 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 Dana Weisshaar, MD. To verify Dana Weisshaar, 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.
Medicare Part D Prescribing Data
CMS Medicare Part D prescriber-level data for calendar year 2023.
893
Total Claims
$748K
Total Drug Cost
178
Medicare Beneficiaries
Prescribing Breakdown
- 30-Day Fills
- 2,666
- Total Day Supply
- 79,376
- Generic Drug Cost
- $18K
- Antibiotic Claims
- 12
Patient Demographics
- Average Patient Age
- 68.8 years
- Avg HCC Risk Score
- 3.01
- Gender Split
- 32% female / 68% male
Top Prescribed Drugs (Medicare Part D)
Top drugs by claim count for calendar year 2023. Based on Medicare Part D data only.
What Dana Weisshaar, MD prescribes most
Top Medicare Part D drugs by claim count, 2023
- Carvedilol
Carvedilol
83 claims
- Spironolactone
Spironolactone
73 claims
- Jardiance
Jardiance
62 claims
- Entresto
Entresto
57 claims
- Hydralazine Hcl
Hydralazine Hcl
45 claims
- Losartan Potassium
Losartan Potassium
40 claims
- Atorvastatin Calcium 32
Atorvastatin Calcium
32 claims
- Bisoprolol Fumarate 25
Bisoprolol Fumarate
25 claims
| Drug | Claims |
|---|---|
| Carvedilol | 83 |
| Spironolactone | 73 |
| Jardiance Empagliflozin | 62 |
| Entresto Sacubitril/Valsartan | 57 |
| Hydralazine Hcl | 45 |
| Losartan Potassium | 40 |
| Atorvastatin Calcium | 32 |
| Bisoprolol Fumarate | 25 |
| Metoprolol Succinate | 24 |
| Vyndamax Tafamidis | 22 |
* Counts below 11 are suppressed by CMS for patient privacy. Generic names shown where available from CMS Part D data.
More Advanced Heart Failure and Transplant Cardiology Physician in CA →
All providers in California →
Compare specialties →
Advanced Heart Failure and Transplant Cardiology Physician Overview
How Dana Weisshaar, MD fits within the Advanced Heart Failure and Transplant Cardiology Physician landscape nationally.
510
Advanced Heart Failure and Transplant Cardiology Physician Providers in US
48
States with Advanced Heart Failure and Transplant Cardiology Physician
1,762
Avg Claims per Provider
Dana Weisshaar, MD's 893 claims are below the specialty average of 1,762.
Nearby Advanced Heart Failure and Transplant Cardiology Physician Providers in California
Other clinicians with the same primary specialty enrolled in California, drawn from the same CMS NPPES roster as Weisshaar.
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 Advanced Heart Failure and Transplant Cardiology 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 Dana Weisshaar, MD's specialty? ▼
Dana Weisshaar, MD specializes in Advanced Heart Failure and Transplant Cardiology Physician and practices in Los Gatos, California. Credentials: MD.
How much does Dana Weisshaar, MD prescribe under Medicare Part D? ▼
In 2023, Dana Weisshaar, MD wrote 893 Medicare Part D claims totaling $748K in drug costs for 178 beneficiaries.
Where is Dana Weisshaar, MD located? ▼
Dana Weisshaar, MD is located at 112 PEACH WILLOW CT, Los Gatos, CA, 95032. Phone: (617) 286-6874.
What is Dana Weisshaar, MD's NPI number? ▼
Dana Weisshaar, MD's National Provider Identifier (NPI) is 1952475550, issued on 11/17/2006.
How many Advanced Heart Failure and Transplant Cardiology Physician providers are there in the US? ▼
There are 510 Advanced Heart Failure and Transplant Cardiology Physician providers across 48 states in the US. The average Advanced Heart Failure and Transplant Cardiology Physician provider writes 1,762 Medicare Part D claims per year.
What drugs does Dana Weisshaar, MD prescribe most often? ▼
Based on 2023 Medicare Part D data, Dana Weisshaar, MD's most frequently prescribed drugs include Carvedilol, Spironolactone, Jardiance. This reflects Medicare Part D prescriptions only and does not include commercial insurance or other payer types.
Does Dana Weisshaar, MD accept Medicare? ▼
Dana Weisshaar, MD appears in CMS Medicare data with 893 Part D claims and 178 Medicare beneficiaries in 2023. Contact the provider's office directly to confirm current Medicare enrollment and accepted plans.
How can I verify Dana Weisshaar, MD's credentials? ▼
Dana Weisshaar, MD's NPI is 1952475550 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.
- 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.