Ronald Main, MD
Cardiovascular Disease (Cardiology) · San Jose
- Medicare standing
- Clear
- Enrolled, allowed to bill and order, not excluded
- Plans that list them
- 19
- 4 carriers
- Offices
- 2
Offices
2 locations · County of Santa Clara · Union Physician Services LLC
Looking this up.
Plans that list them
19 plans · 4 carriers
A missing listing does not mean out of network. Directories change, and a listing does not cover every office. Call Dr. Main’s office to confirm they take your plan. Ask about the office you use, its medical group, referrals and appointments.
19 of 19 plans
| Alignment Health BreathEasy (HMO C-SNP) | Alignment Health Plan | Listed | Oct 3, 2026 |
| Alignment Health Clarity (HMO C-SNP) | Alignment Health Plan | Listed | Oct 3, 2026 |
| Alignment Health Harmony (HMO) | Alignment Health Plan | Listed | Oct 3, 2026 |
| Alignment Health Heart & Diabetes (HMO C-SNP) | Alignment Health Plan | Listed | Oct 3, 2026 |
| Alignment Health Heart & Diabetes CalPlus (HMO C-SNP) | Alignment Health Plan | Listed | Oct 3, 2026 |
| Alignment Health Heart & Diabetes Care (HMO C-SNP) | Alignment Health Plan | Listed | Sep 28, 2026 |
| Alignment Health Heart & Diabetes Choice (HMO C-SNP) | Alignment Health Plan | Listed | Sep 28, 2026 |
| Alignment Health Honor+ Plan (HMO) | Alignment Health Plan | Listed | Oct 3, 2026 |
| Alignment Health My Choice CalCare (HMO) | Alignment Health Plan | Listed | Oct 3, 2026 |
| Alignment Health Silicon (HMO C-SNP) | Alignment Health Plan | Listed | Oct 3, 2026 |
| Alignment Health smartHMO (HMO) | Alignment Health Plan | Listed | Oct 3, 2026 |
| Alignment Health the ONE (HMO) | Alignment Health Plan | Listed | Oct 3, 2026 |
| Anthem Full Dual Advantage Aligned (HMO D-SNP) | Anthem Blue Cross | Listed | Oct 3, 2026 |
| Anthem Medicare Advantage (HMO-POS) | Anthem Blue Cross | Listed | Oct 3, 2026 |
| SCAN Balance (HMO C-SNP) | SCAN Health Plan | Listed | Oct 3, 2026 |
| SCAN Classic (HMO) | SCAN Health Plan | Listed | Oct 3, 2026 |
| SCAN MyChoice (HMO) | SCAN Health Plan | Listed | Oct 3, 2026 |
| SCAN Strive (HMO C-SNP) | SCAN Health Plan | Listed | Oct 3, 2026 |
| DualConnect (HMO D-SNP) | Santa Clara Family Health Plan | Listed | Sep 1, 2026 |
California Medical Board record
Licence G40882 · Current
Licensed to practise in California · since 1979 · expires 2027-07-31 · University of California, Los Angeles School of Medicine.
No disciplinary actions, convictions, malpractice judgments or citations in this record.
Original Medicare doctor bills
$5,642
Medicare paid this office $5,642 for 34 people.
This is what Medicare paid the clinician — not Medicare Advantage, and not the pharmacy.
| Subsequent hospital care with moderate levelof medical decision making at least 35 minutes | 18 | $1,702 | $61 |
| Initial hospital care with moderate level of medical decision making at least 75 minutes | 13 | $1,667 | $128 |
| Subsequent hospital care with straightforward or low level of medical decision making, per day at least 25 minutes | 23 | $1,275 | $38 |
Who their Medicare patients are
34 Original Medicare patients in 2024. Average age 77 · Women 59% · Also on Medicaid 32% · Health risk score 2.38. Above the middle of the specialty; the typical cardiology clinician is at 1.71.
Conditions among them: High blood pressure 75% · Coronary heart disease 74% · Heart failure 74% · Diabetes 71% · Atrial fibrillation 68% · Chronic kidney disease 65% · COPD 44% · Depression 35% · Stroke 32%.
The office billed $30,447, Medicare allowed $7,332 and paid $5,642; for 86 services of 6 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.
Year by year
| 2024 | 34 | 86 | 77 | 2.38 | $30,447 | $5,642 |
| 2023 | 285 | 538 | 76 | 1.78 | $100,701 | $26,106 |
| 2021 | 484 | 1,523 | 75 | 1.65 | $294,752 | $86,466 |
| 2020 | 159 | 293 | 73 | 1.82 | $14,227 | $5,169 |
| 2019 | 306 | 542 | 76 | 1.88 | $102,637 | $36,790 |
| 2018 | 219 | 515 | 75 | 1.64 | $68,387 | $24,812 |
| 2016 | 91 | 138 | 73 | 2.19 | $13,107 | $5,774 |
| 2015 | 15 | 40 | 74 | 2.33 | $25,710 | $3,221 |
| 2014 | 124 | 415 | 73 | 1.71 | $223,773 | $31,278 |
| 2013 | 59 | 228 | 73 | 2.03 | $90,857 | $15,077 |
Original Medicare only. A service billed for fewer than 11 people in a year is hidden, so the lines can add up to less than the year's total.
See the services billed each year
2023: 9 services
| Ultrasound of heart with color-depicted blood flow, rate, direction and valve function | 144 | $7,512 | $52 |
| Subsequent hospital care with moderate levelof medical decision making at least 35 minutes | 45 | $5,101 | $62 |
| Initial hospital care with moderate level of medical decision making at least 75 minutes | 35 | $4,712 | $135 |
| Subsequent hospital care with moderate levelof medical decision making at least 50 minutes | 14 | $2,248 | $94 |
| Initial hospital care with straightforward or low-level medical decision making at least 55 minutes | 18 | $1,888 | $99 |
| Hospital discharge day management, more than 30 minutes | 11 | $990 | $90 |
| Routine electrocardiogram (ecg) using at least 12 leads with interpretation and report only | 111 | $820 | $6 |
| Subsequent hospital care with straightforward or low level of medical decision making, per day at least 25 minutes | 15 | $697 | $39 |
| Ultrasound of heart, follow-up | 18 | $328 | $18 |
2021: 22 services
| Nuclear medicine studies of heart muscle at rest and with stress and spect | 45 | $15,526 | $345 |
| Return visit (30+ min) | 105 | $13,259 | $97 |
| Short return visit (20+ min) | 147 | $12,611 | $66 |
| Technetium tc-99m sestamibi, diagnostic, per study dose | 45 | $8,774 | $97 |
| Injection, regadenoson, 0.1 mg | 41 | $7,652 | None |
| Initial hospital care with straightforward or low-level medical decision making at least 55 minutes | 44 | $5,011 | $109 |
| Subsequent hospital care with moderate levelof medical decision making at least 35 minutes | 42 | $4,206 | $58 |
| Long return visit (40+ min) | 22 | $2,881 | $131 |
| Short return visit | 55 | $2,825 | $44 |
| Routine electrocardiogram (ecg) using at least 12 leads with interpretation and report | 190 | $2,081 | $10 |
| Subsequent hospital care with straightforward or low level of medical decision making, per day at least 25 minutes | 32 | $1,337 | $30 |
| Ultrasound of heart with color-depicted blood flow, rate, direction and valve function | 20 | $1,151 | $58 |
| Exercise or drug-induced heart stress test with electrocardiogram (ecg) | 48 | $1,082 | $23 |
| Exercise or drug-induced heart stress test with electrocardiogram (ecg) with supervision by physician | 61 | $1,070 | $18 |
| Exercise or drug-induced heart stress test with electrocardiogram (ecg) with supervision by physician | 48 | $841 | $18 |
| Routine electrocardiogram (ecg) using at least 12 leads with interpretation and report only | 69 | $586 | $7 |
| Exercise or drug-induced heart stress test with electrocardiogram (ecg) with review by physician | 43 | $502 | $12 |
| Ultrasound of heart, follow-up | 15 | $311 | $21 |
| Heart rhythm review and interpretation of continous external ekg over 8-15 days | 12 | $136 | $11 |
| Heart rhythm recording of continous external ekg over 8-15 days | 15 | $102 | $7 |
| Ultrasound of heart blood flow, valves and chambers, follow-up | 15 | $89 | $6 |
| Ultrasound of heart with color-depicted blood flow, rate and valve function | 14 | $36 | $3 |
2020: 1 service
| Routine electrocardiogram (ecg) using at least 12 leads with interpretation and report only | 152 | $1,570 | $7 |
2019: 6 services
| Ultrasound of heart with color-depicted blood flow, rate, direction and valve function | 206 | $12,447 | $60 |
| Subsequent hospital care with moderate levelof medical decision making at least 35 minutes | 72 | $7,519 | $60 |
| Initial hospital care with straightforward or low-level medical decision making at least 55 minutes | 51 | $5,804 | $114 |
| Initial hospital care with moderate level of medical decision making at least 75 minutes | 23 | $3,833 | $167 |
| Subsequent hospital care with straightforward or low level of medical decision making, per day at least 25 minutes | 39 | $1,516 | $33 |
| Nuclear medicine studies of heart muscle at rest and with stress and spect | 12 | $785 | $65 |
2018: 10 services
| Subsequent hospital care with moderate levelof medical decision making at least 35 minutes | 34 | $3,971 | $58 |
| Short return visit (20+ min) | 80 | $3,638 | $38 |
| Return visit (30+ min) | 50 | $3,314 | $59 |
| Initial hospital care with straightforward or low-level medical decision making at least 55 minutes | 28 | $3,000 | $107 |
| Initial hospital care with moderate level of medical decision making at least 75 minutes | 17 | $2,471 | $145 |
| Ultrasound of heart with color-depicted blood flow, rate, direction and valve function | 29 | $1,722 | $59 |
| New patient visit (45+ min) | 13 | $1,347 | $104 |
| Subsequent hospital care with moderate levelof medical decision making at least 50 minutes | 13 | $1,166 | $83 |
| Routine electrocardiogram (ecg) using at least 12 leads with interpretation and report only | 109 | $750 | $6 |
| Subsequent hospital care with straightforward or low level of medical decision making, per day at least 25 minutes | 12 | $648 | $32 |
2016: 5 services
| Return visit (30+ min) | 21 | $1,908 | $87 |
| Ultrasound of heart with color-depicted blood flow, rate, direction and valve function | 25 | $1,329 | $51 |
| Short return visit (20+ min) | 18 | $982 | $55 |
| Routine electrocardiogram (ecg) using at least 12 leads with interpretation and report | 13 | $172 | $13 |
| Routine electrocardiogram (ecg) using at least 12 leads with interpretation and report only | 19 | $142 | $7 |
2014: 6 services
| Subsequent hospital care with moderate levelof medical decision making at least 35 minutes | 84 | $11,963 | $56 |
| Initial hospital care with moderate level of medical decision making at least 75 minutes | 50 | $8,782 | $157 |
| Subsequent hospital care with moderate levelof medical decision making at least 50 minutes | 39 | $4,087 | $80 |
| Hospital discharge day management, more than 30 minutes | 18 | $1,480 | $82 |
| Hospital discharge day management, 30 minutes or less | 25 | $1,446 | $56 |
| Subsequent hospital care with straightforward or low level of medical decision making, per day at least 25 minutes | 12 | $485 | $30 |
2013: 3 services
| Subsequent hospital care with moderate levelof medical decision making at least 35 minutes | 47 | $8,278 | $54 |
| Initial hospital care with moderate level of medical decision making at least 75 minutes | 23 | $3,400 | $148 |
| Hospital discharge day management, 30 minutes or less | 24 | $1,305 | $54 |
Medicaid work
$591 in 2023
Medicaid paid $591 for 34 billed services this clinician did in 2023, up to 14 people in a month for one service.
Medicaid and CHIP claims where this clinician did the service, fee-for-service and managed care together. Any month with fewer than 11 patients is hidden, so small Medicaid practices undercount.
| Echocardiography, transthoracic, real-time with image documentation (2D), includes M-mode recording, when performed, complete, with spectral Doppler echocardiography, and with color flow Doppler echocardiography | 13 | $459 |
| Electrocardiogram, routine ECG with at least 12 leads; interpretation and report only | 21 | $132 |
| 2023 | 34 | 2 | 14 | $591 |
| 2022 | 73 | 1 | 43 | $447 |
| 2021 | 134 | 4 | 40 | $2,810 |
| 2020 | 128 | 1 | 104 | $829 |
| 2019 | 68 | 1 | 28 | $3,308 |
| 2018 | 42 | 2 | 17 | $267 |
See the largest Medicaid services in earlier years
2022
| Electrocardiogram, routine ECG with at least 12 leads; interpretation and report only | 73 | $447 |
2021
| CARDIOVASCULAR STRESS TEST | 46 | $1,085 |
| CARDIOVASCULAR STRESS TEST | 15 | $830 |
| Electrocardiogram, routine ECG with at least 12 leads; interpretation and report only | 61 | $492 |
| Electrocardiogram, routine ECG with at least 12 leads; with interpretation and report | 12 | $404 |
2020
| Electrocardiogram, routine ECG with at least 12 leads; interpretation and report only | 128 | $829 |
2019
| Echocardiography, transthoracic, real-time with image documentation (2D), includes M-mode recording, when performed, complete, with spectral Doppler echocardiography, and with color flow Doppler echocardiography | 68 | $3,308 |
2018
| Short return visit (20+ min) | 18 | $205 |
| Electrocardiogram, routine ECG with at least 12 leads; interpretation and report only | 24 | $62 |
Money from drug and device companies
$95 in 2025
| 2025 | 1 | 1 | None | $95 |
| 2024 | 1 | 1 | None | $125 |
| 2022 | 2 | 2 | None | $22 |
| 2021 | 2 | 3 | None | $46 |
Paid work is consulting, speaking, honoraria and royalties, as opposed to meals and travel.
A payment is not proof that care is biased.
| Boston Scientific | General - Structural Heart | $95 | 1 payment
|
See the published payment
| Boston Scientific | Grant · 2025-01-30 | General - Structural Heart | $95 |
See earlier years (2024, 2022, 2021)
2024: $125
| E.R. Squibb & Sons L.L.C. | Camzyos | $125 | 1 payment
|
2022: $22
| AstraZeneca Pharmaceuticals LP | Brilinta | $12 | 1 payment
|
| ZOLL Services LLC (A/K/A ZOLL LifeCor Corp) | Lifevest | $10 | 1 payment
|
2021: $46
| Novartis Pharmaceuticals | Entresto | $32 | 2 payments
|
| Preventice Services | Bg Mini Plus | $15 | 1 payment
|
Professional record
- NPI
- 1063520526
- Licence
- CA G40882, IN 01094694ACalifornia G40882: Current · expires 2027-07-31
- Group
- County of Santa Clara · Union Physician Services LLC
- Gender
- Male
More record details
- Sole proprietor
- No
- Medicaid ID
- NM 35485221
- Taxonomy
- Cardiology (207RC0000X)
- Mailing address
- 2604b El Camino Real Ste 275, Carlsbad, CA, 92008
- NPI first listed
- 2006-08-26
- NPI last updated
- 2024-08-27
- NPI record certified
- 2024-08-27
This is when the NPI record was last certified, not a medical board exam.