Dana Maria Weisshaar, MD
Cardiovascular Disease (Cardiology) · Los Gatos
- Medicare standing
- Clear
- Enrolled, allowed to bill and order, not excluded
- Plans that list them
- Not verified
- Not the same as out of network.
- Offices
- 2
Offices
2 locations · Empallo Medical Group, P.A. · Mohammed S Qayyum MD Inc
Looking this up.
Plan participation
Not verified
We could not verify current plan participation for this doctor. This does not mean they are out of network. Call Dr. Weisshaar’s office to ask if they take your plan before you enroll.
California Medical Board record
Licence G75915 · Current
Licensed to practise in California · since 1993 · expires 2028-07-31 · Medical College of Ohio.
No disciplinary actions, convictions, malpractice judgments or citations in this record.
Original Medicare doctor bills
$10,091
Medicare paid this office $10,091 for 35 people.
This is what Medicare paid the clinician — not Medicare Advantage, and not the pharmacy.
| New patient visit (60+ min) | 18 | $3,754 | $209 |
| Long return visit (40+ min) | 14 | $2,935 | $173 |
| Return visit (30+ min) | 14 | $2,474 | $124 |
| Routine electrocardiogram (ecg) using at least 12 leads with interpretation and report | 21 | $296 | $14 |
Who their Medicare patients are
35 Original Medicare patients in 2024. Average age 77 · Women 40% · Health risk score 0.97. At or below the middle of the specialty; the typical cardiology clinician is at 1.71.
Conditions among them: High blood pressure 75% · Coronary heart disease 75% · Heart failure 37% · Atrial fibrillation 31%.
The office billed $23,501, Medicare allowed $12,665 and paid $10,091; for 84 services of 11 kinds.
Original Medicare patients only. A risk score of 1.0 is the average Medicare patient; higher means sicker. Any count under 11 is hidden.
Drugs they prescribed that Part D paid
$57,508
Pharmacies billed $57,508 in 2024.
This is pharmacy cost, not the office bill, and not what patients paid.
Opioids were 0% of their Part D prescriptions (0 of 204) in 2024. At or below the middle of the specialty; the typical cardiology clinician is at 0%.
170 generic and fewer than 11 brand-name prescriptions · $57,508 in drug cost.
Part D prescriptions only. The opioid rate is opioid prescriptions as a share of all this clinician's Part D prescriptions; surgeons and pain specialists run higher than others, so it is shown against the same specialty.
| Entresto | 17 | $42,033 | $2,473 |
| Losartan | 18 | $360 | $20 |
| Carvedilol | 16 | $197 | $12 |
| Rosuvastatin | 14 | $151 | $11 |
| Spironolactone | 11 | $115 | $10 |
Year by year
| 2024 | 204 | 84 | 0% (0) | None | $57,508 |
| 2023 | 893 | 178 | None | None | $747,654 |
| 2022 | 978 | 191 | None | None | $959,956 |
| 2021 | 922 | 181 | None | 24% | $1,104,606 |
| 2020 | 850 | 180 | None | None | $801,388 |
| 2019 | 758 | 148 | None | 21% | $396,359 |
| 2018 | 870 | 169 | None | 17% | $206,903 |
| 2017 | 967 | 166 | None | 19% | $505,327 |
| 2016 | 962 | 176 | None | None | $370,182 |
| 2015 | 1,112 | 167 | None | None | $529,298 |
| 2014 | 1,027 | 169 | 1% (11) | 18% | $449,793 |
| 2013 | 911 | 167 | 2% (18) | 15% | $137,314 |
Part D prescriptions only. A drug prescribed to fewer than 11 people in a year is hidden.
See the drugs prescribed each year
2023: 23 drugs
| Vyndamax | 22 | $552,113 | $25,096 |
| Entresto | 57 | $106,049 | $1,861 |
| Jardiance | 62 | $46,271 | $746 |
| Spiriva Respimat | 14 | $6,264 | $447 |
| Hydralazine | 45 | $2,085 | $46 |
| Carvedilol | 83 | $1,098 | $13 |
| Eplerenone | 12 | $843 | $70 |
| Spironolactone | 73 | $752 | $10 |
| Bisoprolol | 25 | $747 | $30 |
| Losartan | 40 | $740 | $19 |
| Bumetanide | 15 | $614 | $41 |
| Atorvastatin | 32 | $601 | $19 |
| Metoprolol | 24 | $402 | $17 |
| Amiodarone | 11 | $314 | $29 |
| Rosuvastatin | 18 | $276 | $15 |
| Levothyroxine | 12 | $243 | $20 |
| Isosorbide Mononitrate Er | 13 | $189 | $15 |
| Furosemide | 19 | $182 | $10 |
| Allopurinol | 19 | $181 | $10 |
| Lisinopril | 12 | $167 | $14 |
| Amlodipine Besylate | 14 | $156 | $11 |
| Pantoprazole | 11 | $149 | $14 |
| Omeprazole | 13 | $147 | $11 |
2022: 25 drugs
| Vyndamax | 36 | $775,112 | $21,531 |
| Entresto | 51 | $77,141 | $1,513 |
| Jardiance | 44 | $33,735 | $767 |
| Spiriva Respimat | 17 | $6,267 | $369 |
| Hydralazine | 34 | $2,556 | $75 |
| Eplerenone | 19 | $1,325 | $70 |
| Torsemide | 24 | $1,191 | $50 |
| Carvedilol | 69 | $930 | $13 |
| Spironolactone | 75 | $913 | $12 |
| Losartan | 48 | $827 | $17 |
| Bisoprolol | 19 | $749 | $39 |
| Gabapentin | 14 | $680 | $49 |
| Amiodarone | 18 | $597 | $33 |
| Atorvastatin | 31 | $533 | $17 |
| Levothyroxine | 19 | $455 | $24 |
| Metoprolol | 17 | $387 | $23 |
| Pantoprazole | 18 | $351 | $20 |
| Lisinopril | 16 | $294 | $18 |
| Rosuvastatin | 17 | $252 | $15 |
| Isosorbide Mononitrate Er | 18 | $243 | $14 |
| Furosemide | 19 | $240 | $13 |
| Amlodipine Besylate | 16 | $193 | $12 |
| Allopurinol | 15 | $191 | $13 |
| Omeprazole | 13 | $184 | $14 |
| Amoxicillin | 11 | $142 | $13 |
2021: 22 drugs
| Vyndamax | 45 | $913,640 | $20,303 |
| Entresto | 57 | $89,988 | $1,579 |
| Jardiance | 40 | $34,962 | $874 |
| Spiriva Respimat | 12 | $5,357 | $446 |
| Torsemide | 22 | $2,007 | $91 |
| Hydralazine | 23 | $1,880 | $82 |
| Eplerenone | 16 | $1,086 | $68 |
| Carvedilol | 78 | $1,005 | $13 |
| Spironolactone | 81 | $966 | $12 |
| Bisoprolol | 25 | $949 | $38 |
| Amiodarone | 19 | $661 | $35 |
| Atorvastatin | 34 | $544 | $16 |
| Losartan | 28 | $430 | $15 |
| Digoxin | 16 | $410 | $26 |
| Furosemide | 22 | $409 | $19 |
| Pantoprazole | 15 | $405 | $27 |
| Levothyroxine | 13 | $318 | $24 |
| Pravastatin | 11 | $316 | $29 |
| Metoprolol | 11 | $276 | $25 |
| Allopurinol | 16 | $237 | $15 |
| Rosuvastatin | 19 | $230 | $12 |
| Amlodipine Besylate | 12 | $150 | $13 |
2020: 21 drugs
| Vyndamax | 31 | $634,090 | $20,455 |
| Entresto | 53 | $82,703 | $1,560 |
| Jardiance | 25 | $20,966 | $839 |
| Hydralazine | 45 | $4,740 | $105 |
| Eplerenone | 18 | $1,769 | $98 |
| Torsemide | 21 | $1,414 | $67 |
| Carvedilol | 80 | $1,011 | $13 |
| Spironolactone | 66 | $911 | $14 |
| Amiodarone | 24 | $820 | $34 |
| Bisoprolol | 19 | $784 | $41 |
| Pravastatin | 18 | $610 | $34 |
| Atorvastatin | 29 | $467 | $16 |
| Furosemide | 34 | $421 | $12 |
| Losartan | 23 | $382 | $17 |
| Digoxin | 14 | $362 | $26 |
| Levothyroxine | 11 | $317 | $29 |
| Allopurinol | 14 | $229 | $16 |
| Rosuvastatin | 13 | $186 | $14 |
| Isosorbide Mononitrate Er | 12 | $170 | $14 |
| Amlodipine Besylate | 16 | $163 | $10 |
| Famotidine | 12 | $80 | $7 |
2019: 16 drugs
| Entresto | 54 | $77,071 | $1,427 |
| Eplerenone | 17 | $3,793 | $223 |
| Hydralazine | 27 | $1,567 | $58 |
| Torsemide | 16 | $1,059 | $66 |
| Spironolactone | 55 | $939 | $17 |
| Carvedilol | 70 | $878 | $13 |
| Atorvastatin | 28 | $722 | $26 |
| Losartan | 39 | $698 | $18 |
| Digoxin | 24 | $618 | $26 |
| Pravastatin | 17 | $592 | $35 |
| Bisoprolol | 15 | $578 | $39 |
| Furosemide | 27 | $460 | $17 |
| Amiodarone | 12 | $359 | $30 |
| Pantoprazole | 14 | $358 | $26 |
| Lisinopril | 16 | $187 | $12 |
| Citalopram Hbr | 11 | $128 | $12 |
2018: 25 drugs
| Entresto | 33 | $52,075 | $1,578 |
| Valganciclovir | 14 | $9,096 | $650 |
| Hydralazine | 36 | $3,873 | $108 |
| Eplerenone | 11 | $3,467 | $315 |
| Losartan | 47 | $1,167 | $25 |
| Carvedilol | 83 | $1,058 | $13 |
| Klor-Con M20 | 17 | $965 | $57 |
| Spironolactone | 69 | $930 | $13 |
| Torsemide | 17 | $893 | $53 |
| Digoxin | 30 | $853 | $28 |
| Pravastatin | 25 | $834 | $33 |
| Levothyroxine | 18 | $733 | $41 |
| Furosemide | 33 | $496 | $15 |
| Amiodarone | 14 | $423 | $30 |
| Atorvastatin | 13 | $410 | $32 |
| Lisinopril | 24 | $393 | $16 |
| Pantoprazole | 12 | $384 | $32 |
| Allopurinol | 14 | $382 | $27 |
| Isosorbide Mononitrate Er | 17 | $267 | $16 |
| Fluticasone Propionate | 12 | $223 | $19 |
| Sulfamethoxazole-Trimethoprim | 11 | $201 | $18 |
| Citalopram Hbr | 17 | $197 | $12 |
| Glipizide | 11 | $180 | $16 |
| Warfarin | 11 | $142 | $13 |
| Simvastatin | 12 | $124 | $10 |
2017: 26 drugs
| Thalomid | 26 | $308,785 | $11,876 |
| Zortress | 11 | $83,009 | $7,546 |
| Sirolimus | 12 | $11,416 | $951 |
| Hydralazine | 63 | $7,583 | $120 |
| Tacrolimus | 39 | $4,473 | $115 |
| Mycophenolate Mofetil | 21 | $3,545 | $169 |
| Digoxin | 27 | $2,384 | $88 |
| Klor-Con M20 | 15 | $2,079 | $139 |
| Torsemide | 19 | $1,389 | $73 |
| Losartan | 28 | $1,304 | $47 |
| Carvedilol | 81 | $1,007 | $12 |
| Spironolactone | 66 | $841 | $13 |
| Levothyroxine | 19 | $840 | $44 |
| Lisinopril | 48 | $804 | $17 |
| Pravastatin | 21 | $766 | $36 |
| Furosemide | 39 | $682 | $17 |
| Amiodarone | 18 | $574 | $32 |
| Allopurinol | 16 | $544 | $34 |
| Sulfamethoxazole-Trimethoprim | 19 | $417 | $22 |
| Acyclovir | 11 | $402 | $37 |
| Atorvastatin | 11 | $364 | $33 |
| Isosorbide Mononitrate Er | 18 | $250 | $14 |
| Citalopram Hbr | 14 | $160 | $11 |
| Simvastatin | 13 | $147 | $11 |
| Warfarin | 12 | $139 | $12 |
| Hydrochlorothiazide | 14 | $126 | $9 |
2016: 23 drugs
| Thalomid | 23 | $247,422 | $10,757 |
| Hydralazine | 55 | $7,857 | $143 |
| Spiriva Respimat | 11 | $5,863 | $533 |
| Digoxin | 27 | $2,444 | $91 |
| Losartan | 44 | $2,244 | $51 |
| Torsemide | 28 | $2,077 | $74 |
| Pantoprazole | 23 | $1,274 | $55 |
| Levothyroxine | 26 | $1,204 | $46 |
| Pravastatin | 20 | $947 | $47 |
| Carvedilol | 71 | $879 | $12 |
| Lisinopril | 51 | $827 | $16 |
| Spironolactone | 51 | $813 | $16 |
| K-Tab Er | 16 | $787 | $49 |
| Allopurinol | 18 | $658 | $37 |
| Sulfamethoxazole-Trimethoprim | 24 | $590 | $25 |
| Atorvastatin | 13 | $549 | $42 |
| Furosemide | 33 | $542 | $16 |
| Amiodarone | 14 | $463 | $33 |
| Famotidine | 16 | $419 | $26 |
| Isosorbide Mononitrate Er | 20 | $247 | $12 |
| Amlodipine Besylate | 16 | $216 | $13 |
| Simvastatin | 13 | $212 | $16 |
| Warfarin | 16 | $181 | $11 |
2015: 31 drugs
| Thalomid | 31 | $342,245 | $11,040 |
| Zortress | 15 | $61,621 | $4,108 |
| Hydralazine | 65 | $8,493 | $131 |
| Crestor | 11 | $6,348 | $577 |
| Tacrolimus | 12 | $5,141 | $428 |
| Digoxin | 26 | $2,786 | $107 |
| Losartan | 48 | $2,412 | $50 |
| Torsemide | 22 | $1,442 | $66 |
| Klor-Con M20 | 15 | $1,350 | $90 |
| Pravastatin | 22 | $1,210 | $55 |
| K-Tab Er | 13 | $1,192 | $92 |
| Lisinopril | 60 | $1,090 | $18 |
| Levothyroxine | 23 | $909 | $40 |
| Allopurinol | 24 | $842 | $35 |
| Pantoprazole | 20 | $818 | $41 |
| Carvedilol | 65 | $805 | $12 |
| Gabapentin | 20 | $777 | $39 |
| Omeprazole | 11 | $728 | $66 |
| Fenofibrate | 11 | $713 | $65 |
| Sulfamethoxazole-Trimethoprim | 23 | $593 | $26 |
| Furosemide | 35 | $558 | $16 |
| Spironolactone | 36 | $516 | $14 |
| Proair Hfa | 16 | $498 | $31 |
| Isosorbide Mononitrate Er | 33 | $495 | $15 |
| Atorvastatin | 13 | $465 | $36 |
| Famotidine | 22 | $420 | $19 |
| Simvastatin | 16 | $305 | $19 |
| Sotalol | 17 | $294 | $17 |
| Lactulose | 11 | $221 | $20 |
| Warfarin | 13 | $172 | $13 |
| Metoprolol | 12 | $170 | $14 |
2014: 29 drugs
| Thalomid | 18 | $282,653 | $15,703 |
| Hydralazine | 58 | $7,566 | $130 |
| Tikosyn | 21 | $7,252 | $345 |
| Losartan | 50 | $2,687 | $54 |
| Pravastatin | 25 | $1,894 | $76 |
| Digox | 23 | $1,470 | $64 |
| Dilt-Xr | 14 | $1,372 | $98 |
| Dipyridamole | 13 | $1,097 | $84 |
| Carvedilol | 87 | $1,036 | $12 |
| Omeprazole | 12 | $765 | $64 |
| Lisinopril | 46 | $742 | $16 |
| Gabapentin | 15 | $702 | $47 |
| Torsemide | 18 | $637 | $35 |
| Amiodarone | 19 | $556 | $29 |
| Sertraline | 18 | $552 | $31 |
| Pantoprazole | 15 | $547 | $36 |
| Sulfamethoxazole-Trimethoprim | 26 | $526 | $20 |
| Atorvastatin | 14 | $460 | $33 |
| Isosorbide Mononitrate Er | 24 | $430 | $18 |
| Furosemide | 31 | $425 | $14 |
| Allopurinol | 16 | $419 | $26 |
| Levothyroxine | 16 | $413 | $26 |
| Simvastatin | 15 | $307 | $20 |
| Spironolactone | 27 | $300 | $11 |
| Glipizide | 16 | $213 | $13 |
| Warfarin | 16 | $206 | $13 |
| Sotalol | 13 | $178 | $14 |
| Trazodone | 14 | $177 | $13 |
| Citalopram Hbr | 12 | $145 | $12 |
2013: 22 drugs
| Valcyte | 14 | $42,545 | $3,039 |
| Hydralazine | 65 | $6,214 | $96 |
| Tikosyn | 16 | $4,519 | $282 |
| Losartan | 44 | $2,646 | $60 |
| Klor-Con M20 | 19 | $2,492 | $131 |
| Torsemide | 23 | $1,999 | $87 |
| Amiodarone | 20 | $927 | $46 |
| Pantoprazole | 14 | $802 | $57 |
| Pravastatin | 13 | $788 | $61 |
| Carvedilol | 65 | $778 | $12 |
| Lisinopril | 41 | $776 | $19 |
| Sulfamethoxazole-Trimethoprim | 16 | $675 | $42 |
| Allopurinol | 20 | $519 | $26 |
| Furosemide | 31 | $454 | $15 |
| Isosorbide Mononitrate Er | 26 | $420 | $16 |
| Levothyroxine | 13 | $350 | $27 |
| Glipizide | 20 | $295 | $15 |
| Citalopram Hbr | 19 | $279 | $15 |
| Famotidine | 14 | $265 | $19 |
| Spironolactone | 23 | $246 | $11 |
| Warfarin | 19 | $221 | $12 |
| Hydrocodone-Acetaminophen | 14 | $206 | $15 |
Money from drug and device companies
$89 in 2025
| 2025 | 2 | 4 | None | $89 |
| 2024 | 8 | 10 | None | $378 |
Paid work is consulting, speaking, honoraria and royalties, as opposed to meals and travel.
A payment is not proof that care is biased.
| Pfizer | Vyndaqel | $50 | 2 payments
|
| E.R. Squibb & Sons L.L.C. | Eliquis | $39 | 2 payments
|
See all 4 published payments
| E.R. Squibb & Sons L.L.C. | Meals · 2025-10-27 | Eliquis | $20 |
| Pfizer | Meals · 2025-09-30 | Vyndaqel | $26 |
| E.R. Squibb & Sons L.L.C. | Meals · 2025-09-22 | Eliquis | $18 |
| Pfizer | Meals · 2025-05-12 | Vyndaqel | $24 |
See earlier years (2024)
2024: $378
| Bayer Healthcare Pharmaceuticals | Kerendia | $133 | 3 payments
|
| E.R. Squibb & Sons L.L.C. | Camzyos | $118 | 1 payment
|
| Amgen | Repatha | $26 | 1 payment
|
| Actelion Pharmaceuticals US | Opsumit | $25 | 1 payment
|
| Kiniksa Pharmaceuticals International plc | Arcalyst | $21 | 1 payment
|
| Heartflow | Ffrct | $21 | 1 payment
|
| Novartis Pharmaceuticals | Leqvio | $19 | 1 payment
|
| Esperion Therapeutics | Nexletol | $15 | 1 payment
|
Professional record
- NPI
- 1952475550
- Licence
- CA G075915California G75915: Current · expires 2028-07-31
- Trained
- Medical College of Ohio, 1989
- Group
- Empallo Medical Group, P.A. · Mohammed S Qayyum MD Inc
- Video visits
- Lists video visits
- Gender
- Female
More record details
- Sole proprietor
- No
- Medicaid ID
- CA 00G759150
- Taxonomy
- Cardiology (207RC0000X); Federal specialty code 207RA0001X (207RA0001X)
- Mailing address
- 160 Cambridgepark Dr Unit 112, Cambridge, MA, 02140
- NPI first listed
- 2006-11-17
- NPI last updated
- 2026-02-12
- NPI record certified
- 2026-02-12
This is when the NPI record was last certified, not a medical board exam.