Nathaniel Aidan Blecher, MD
Ophthalmology · Stanford
- Medicare standing
- Clear
- Enrolled, allowed to bill and order, not excluded
- Plans that list them
- 12
- 1 carrier
- Office
- 1
Offices
1 location · Stanford Health Care · 3,152 clinicians in this group
Looking this up.
Hospitals listed: Stanford Health Care Tri-Valley. That is not proof they admit you there this week.
Plans that list them
12 plans · 1 carrier
A missing listing does not mean out of network. Directories change, and a listing does not cover every office. Call Dr. Blecher’s office at (650) 723-4000 to confirm they take your plan. Ask about the office you use, its medical group, referrals and appointments.
| 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 |
Hospitals they work in
1 hospital
These rate the hospital, not this clinician. Most measures at most hospitals are no different from the national rate.
- Stanford Health Care Tri-ValleyPleasanton, CAAcute Care Hospital · Voluntary non-profit - Private · Has an emergency department · Birthing-friendlyPart of Stanford Health Care, which runs 3 hospitalsPatients rate it 3 of 5 · 74% would definitely recommend itOverall rating: 5 of 5 starsBetter than the national rate — Central Line Associated Bloodstream Infection (ICU + select Wards): 0.178, Oct 2024 – Sep 2025Better than the national rate — Clostridium Difficile (C.Diff): 0.237, Oct 2024 – Sep 2025
See every measure and the patient survey for Stanford Health Care Tri-Valley
Behind the star rating — Deaths: 2 better, 6 the same, 0 worse of 8 measures. Safety: 2 better, 5 the same, 0 worse of 7 measures. Readmissions: 2 better, 7 the same, 0 worse of 9 measures. The star rating is worked out from an earlier period than the measures below, so the two can disagree.
| Central Line Associated Bloodstream Infection (ICU + select Wards)Infections | 0.178 | Better | Oct 2024 – Sep 2025 |
| Clostridium Difficile (C.Diff)Infections | 0.237 | Better | Oct 2024 – Sep 2025 |
| Abdominopelvic accidental puncture or laceration rateComplications and deaths | 0.79 (0 to 1.73) · 1,041 cases | No different | Jul 2022 – Jun 2024 |
| CMS Medicare PSI 90: Patient safety and adverse events compositeComplications and deaths | 0.79 (0.5 to 1.08) | No different | Jul 2022 – Jun 2024 |
| Death rate among surgical inpatients with serious treatable complicationsComplications and deaths | 145.81 (96.5 to 195.12) · 72 cases | No different | Jul 2022 – Jun 2024 |
| Death rate for CABG surgery patientsComplications and deaths | 2.9 · 55 cases | None | Jul 2022 – Jun 2025 |
| Death rate for COPD patientsComplications and deaths | 8.6 · 92 cases | None | Jul 2022 – Jun 2025 |
| Death rate for heart attack patientsComplications and deaths | 12.5 · 96 cases | None | Jul 2022 – Jun 2025 |
| Death rate for heart failure patientsComplications and deaths | 9.5 · 395 cases | None | Jul 2022 – Jun 2025 |
| Death rate for pneumonia patientsComplications and deaths | 10.3 · 391 cases | None | Jul 2022 – Jun 2025 |
| Death rate for stroke patientsComplications and deaths | 10.1 · 162 cases | None | Jul 2023 – Jun 2025 |
| Hybrid Hospital-Wide All-Cause Risk Standardized Mortality RateComplications and deaths | 3 · 1,736 cases | None | Jul 2024 – Jun 2025 |
| Iatrogenic pneumothorax rateComplications and deaths | 0.16 (0 to 0.37) · 4,425 cases | No different | Jul 2022 – Jun 2024 |
| In-hospital fall-associated fracture rateComplications and deaths | 0.22 (0.02 to 0.41) · 4,771 cases | No different | Jul 2022 – Jun 2024 |
| Perioperative pulmonary embolism or deep vein thrombosis rateComplications and deaths | 3.45 (1.46 to 5.44) · 1,403 cases | No different | Jul 2022 – Jun 2024 |
| Postoperative acute kidney injury requiring dialysis rateComplications and deaths | 1.5 (0.05 to 2.94) · 645 cases | No different | Jul 2022 – Jun 2024 |
| Postoperative hemorrhage or hematoma rateComplications and deaths | 1.81 (0.38 to 3.24) · 1,279 cases | No different | Jul 2022 – Jun 2024 |
| Postoperative respiratory failure rateComplications and deaths | 8.53 (3.2 to 13.85) · 639 cases | No different | Jul 2022 – Jun 2024 |
| Postoperative sepsis rateComplications and deaths | 5.15 (1.89 to 8.41) · 648 cases | No different | Jul 2022 – Jun 2024 |
| Postoperative wound dehiscence rateComplications and deaths | 1.61 (0.14 to 3.07) · 370 cases | No different | Jul 2022 – Jun 2024 |
| Pressure ulcer rateComplications and deaths | 0.16 (0 to 0.83) · 4,160 cases | No different | Jul 2022 – Jun 2024 |
| Rate of complications for hip/knee replacement patientsComplications and deaths | 4 · 74 cases | None | Apr 2023 – Mar 2025 |
| Catheter Associated Urinary Tract Infections (ICU + select Wards)Infections | 0.369 | No different | Oct 2024 – Sep 2025 |
| MRSA BacteremiaInfections | 1.112 | No different | Oct 2024 – Sep 2025 |
| SSI - Colon SurgeryInfections | 0 | No different | Oct 2024 – Sep 2025 |
| Acute Myocardial Infarction (AMI) 30-Day Readmission RateUnplanned return visits | 13.1 · 110 cases | None | Jul 2023 – Jun 2025 |
| Heart failure (HF) 30-Day Readmission RateUnplanned return visits | 20.1 · 437 cases | None | Jul 2023 – Jun 2025 |
| Hospital return days for heart attack patientsUnplanned return visits | -5.8 · 94 cases | None | Jul 2022 – Jun 2025 |
| Hospital return days for heart failure patientsUnplanned return visits | -19.3 · 456 cases | None | Jul 2022 – Jun 2025 |
| Hospital return days for pneumonia patientsUnplanned return visits | -0.3 · 402 cases | None | Jul 2022 – Jun 2025 |
| Pneumonia (PN) 30-Day Readmission RateUnplanned return visits | 15.8 · 358 cases | None | Jul 2023 – Jun 2025 |
| Rate of emergency department (ED) visits for patients receiving outpatient chemotherapyUnplanned return visits | 6.8 (4.7 to 9.6) · 198 cases | No different | Jan 2024 – Dec 2024 |
| Rate of inpatient admissions for patients receiving outpatient chemotherapyUnplanned return visits | 10.1 (7.5 to 13.6) · 198 cases | No different | Jan 2024 – Dec 2024 |
| Rate of readmission after hip/knee replacementUnplanned return visits | 5.3 · 80 cases | None | Jul 2023 – Jun 2025 |
| Rate of readmission for CABGUnplanned return visits | 10.9 · 46 cases | None | Jul 2023 – Jun 2025 |
| Rate of readmission for chronic obstructive pulmonary disease (COPD) patientsUnplanned return visits | 19.3 · 92 cases | None | Jul 2023 – Jun 2025 |
| Rate of unplanned hospital visits after colonoscopy (per 1,000 colonoscopies)Unplanned return visits | 12.4 (9.6 to 16.2) · 1,532 cases | No different | Jan 2022 – Dec 2024 |
| Ratio of unplanned hospital visits after hospital outpatient surgeryUnplanned return visits | 1 (0.8 to 1.2) · 929 cases | No different | Jan 2024 – Dec 2024 |
What patients said (1,268 patients answered, 26% of those asked)
| Cleanliness | 3 |
| Nurse communication | 3 |
| Doctor communication | 4 |
| Communication about medicines | 3 |
| Discharge information | 4 |
| Overall hospital rating | 3 |
| Quietness | 2 |
| Recommend hospital | 4 |
| Room was "always" clean | 65% |
| Nurses "always" communicated well | 77% |
| Doctors "always" communicated well | 79% |
| Staff "always" explained | 58% |
| Yes, staff "did" give patients this information | 88% |
| Yes, staff "did" give patients information about help after discharge | 88% |
| Doctors "always" explained things so they could understand | 74% |
| Doctors "always" listened carefully | 78% |
| Doctors "always" treated them with courtesy and respect | 86% |
| Patients who gave a rating of "9" or "10" (high) | 70% |
| Staff "always" explained new medications | 72% |
| Nurses "always" explained things so they could understand | 73% |
| Nurses "always" listened carefully | 74% |
| Nurses "always" treated them with courtesy and respect | 84% |
| "Always" quiet at night | 42% |
| "YES", patients would definitely recommend the hospital | 74% |
| Staff "always" explained possible side effects | 44% |
| Yes, staff "did" give patients information about possible symptoms | 89% |
Original Medicare doctor bills
$26,748
Medicare paid this office $26,748 for 177 people.
This is what Medicare paid the clinician — not Medicare Advantage, and not the pharmacy.
| Initial hospital care with straightforward or low-level medical decision making at least 55 minutes | 45 | $4,340 | $94 |
| Subsequent hospital care with moderate levelof medical decision making at least 35 minutes | 22 | $2,150 | $60 |
| Return visit (30+ min) | 15 | $1,261 | $84 |
| Initial hospital care with straightforward or low level of medical decision making, per day at least 40 minutes | 17 | $1,069 | $63 |
| Emergency department visit with low level of medical decision making | 18 | $1,035 | $54 |
See all 6 services
| Initial hospital care with straightforward or low-level medical decision making at least 55 minutes | 45 | $4,340 | $94 |
| Subsequent hospital care with moderate levelof medical decision making at least 35 minutes | 22 | $2,150 | $60 |
| Return visit (30+ min) | 15 | $1,261 | $84 |
| Initial hospital care with straightforward or low level of medical decision making, per day at least 40 minutes | 17 | $1,069 | $63 |
| Emergency department visit with low level of medical decision making | 18 | $1,035 | $54 |
| Visit complexity inherent to evaluation and management associated with medical care services that serve as the continuing focal point for all needed health care services and/or with medical care services that are part of ongoing care related to a patient's | 11 | $111 | $10 |
Procedures Medicare counted
| Cataract surgery | 47 | More than 62% of doctors who do this |
Who their Medicare patients are
177 Original Medicare patients in 2024. Average age 70 · Under 65 22% · 85 and older 9% · Women 45% · Also on Medicaid 32% · Health risk score 2.38. Sicker patients than 9 in 10 peers; the typical ophthalmology clinician is at 1.16.
Conditions among them: High blood pressure 75% · Diabetes 43% · Depression 40% · Chronic kidney disease 39% · Coronary heart disease 31% · Heart failure 31% · COPD 25% · Atrial fibrillation 23% · Stroke 23% · Cancer 16% · Dementia 15%.
The office billed $143,811, Medicare allowed $35,315 and paid $26,748; for 267 services of 42 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 | 177 | 267 | 70 | 2.38 | $143,811 | $26,748 |
| 2023 | 142 | 257 | 70 | 2.30 | $130,673 | $28,804 |
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: 6 services
| Removal of cataract with insertion of prosthetic lens | 15 | $6,660 | $416 |
| Initial hospital care with straightforward or low-level medical decision making at least 55 minutes | 33 | $3,332 | $101 |
| Subsequent hospital care with moderate levelof medical decision making at least 35 minutes | 29 | $3,069 | $61 |
| New patient visit (45+ min) | 12 | $1,430 | $119 |
| Initial hospital care with straightforward or low level of medical decision making, per day at least 40 minutes | 18 | $1,122 | $59 |
| Measurement of corneal curvature and depth of eye | 22 | $668 | $29 |
Medicaid work
$0 in 2023
Medicaid paid $0 for 13 billed services this clinician did in 2023, up to 12 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.
| Posterior chamber intraocular lens | 13 | $0 |
| 2023 | 13 | 1 | 12 | $0 |
Drugs they prescribed that Part D paid
$62,699
Pharmacies billed $62,699 in 2024.
This is pharmacy cost, not the office bill, and not what patients paid.
856 generic and 288 brand-name prescriptions · $62,699 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.
| Prednisolone Acetate | 153 | $6,605 | $43 |
| Lumigan | 14 | $6,289 | $449 |
| Rhopressa | 16 | $5,622 | $351 |
| Latanoprost | 293 | $3,646 | $12 |
| Dorzolamide-Timolol | 174 | $2,617 | $15 |
See all 14 drugs
| Prednisolone Acetate | 153 | $6,605 | $43 |
| Lumigan | 14 | $6,289 | $449 |
| Rhopressa | 16 | $5,622 | $351 |
| Latanoprost | 293 | $3,646 | $12 |
| Dorzolamide-Timolol | 174 | $2,617 | $15 |
| Travoprost | 16 | $2,319 | $145 |
| Brimonidine | 121 | $1,983 | $16 |
| Dorzolamide-Timolol | 11 | $1,948 | $177 |
| Timolol Maleate | 80 | $1,313 | $16 |
| Dorzolamide | 46 | $865 | $19 |
| Atropine Sulfate | 11 | $458 | $42 |
| Moxifloxacin | 26 | $314 | $12 |
| Polymyxin B Sul-Trimethoprim | 34 | $284 | $8 |
| Ciprofloxacin | 20 | $226 | $11 |
Year by year
| 2024 | 1,144 | 578 | None | 25% | $62,699 |
| 2023 | 392 | 114 | None | 44% | $17,281 |
| 2022 | 157 | 38 | None | 20% | $8,738 |
| 2021 | 220 | 84 | 0% (0) | 41% | $13,046 |
| 2020 | 76 | 31 | None | 26% | $2,695 |
| 2019 | 30 | 13 | None | None | $1,680 |
Part D prescriptions only. A drug prescribed to fewer than 11 people in a year is hidden.
See the drugs prescribed each year
2023: 7 drugs
| Prednisolone Acetate | 107 | $4,005 | $37 |
| Moxifloxacin | 71 | $1,711 | $24 |
| Valacyclovir | 15 | $1,671 | $111 |
| Latanoprost | 71 | $1,114 | $16 |
| Dorzolamide-Timolol | 36 | $1,063 | $30 |
| Ketorolac Tromethamine | 24 | $669 | $28 |
| Brimonidine | 16 | $163 | $10 |
2022: 5 drugs
| Valacyclovir | 15 | $1,370 | $91 |
| Dorzolamide-Timolol | 36 | $760 | $21 |
| Prednisolone Acetate | 13 | $732 | $56 |
| Latanoprost | 30 | $617 | $21 |
| Brimonidine | 18 | $290 | $16 |
2021: 6 drugs
| Prednisolone Acetate | 46 | $1,890 | $41 |
| Tobramycin-Dexamethasone | 19 | $1,636 | $86 |
| Valacyclovir | 12 | $916 | $76 |
| Dorzolamide-Timolol | 22 | $571 | $26 |
| Latanoprost | 15 | $261 | $17 |
| Timolol Maleate | 11 | $153 | $14 |
2020: 2 drugs
| Metoprolol | 14 | $153 | $11 |
| Atorvastatin | 11 | $54 | $5 |
Money from drug and device companies
$239 in 2025
| 2025 | 3 | 3 | None | $239 |
| 2024 | 4 | 5 | None | $601 |
| 2022 | 1 | 1 | None | $25 |
| 2021 | 3 | 3 | None | $257 |
| 2019 | 1 | 2 | None | $417 |
Paid work is consulting, speaking, honoraria and royalties, as opposed to meals and travel.
A payment is not proof that care is biased.
| Sight Sciences | Omni Surgical System | $147 | 1 payment
|
| Alcon Vision | Hydrus Microstent | $52 | 1 payment
|
| Abbvie | Xen Glaucoma Treatment System | $41 | 1 payment
|
See all 3 published payments
| Alcon Vision | Meals · 2025-09-17 | Hydrus Microstent | $52 |
| Sight Sciences | Meals · 2025-06-30 | Omni Surgical System | $147 |
| Abbvie | Meals · 2025-02-28 | Xen Glaucoma Treatment System | $41 |
See earlier years (2024, 2022, 2021, 2019)
2024: $601
| Glaukos | Idose | $191 | 1 payment
|
| Sight Sciences | Omni Surgical System | $148 | 1 payment
|
| Alcon Vision | Hydrus Microstent | $141 | 1 payment
|
| Abbvie | Xen Glaucoma Treatment System | $122 | 2 payments
|
2022: $25
| Bausch & Lomb Americas | Envista Mx60 Iol | $25 | 1 payment
|
2021: $257
| Mallinckrodt Hospital Products | Acthar | $122 | 1 payment
|
| Bausch & Lomb a division of Bausch Health US | Envista Mx60 Iol | $116 | 1 payment
|
| Sight Sciences | Omni(R) Surgical System (US) | $19 | 1 payment
|
2019: $417
| Bausch & Lomb a division of Bausch Health US | Prolensa | $417 | 2 payments
|
Checkups this office reported
Medicare did not publish checkup rates for this clinician.
- Medicare’s overall office score
- 79.3 / 100
- Scores the office’s reporting and systems. It is not a grade for how the doctor treats you.
Professional record
- NPI
- 1487215380
- Licence
- MO 2023015369
- Trained
- University of Pittsburgh School of Medicine, 2019
- Group
- Stanford Health Care
- Gender
- Male
More record details
- Sole proprietor
- No
- Taxonomy
- Federal specialty code 207W00000X (207W00000X)
- Mailing address
- 300 Pasteur Dr, Palo Alto, CA, 94305
- NPI first listed
- 2019-06-23
- NPI last updated
- 2025-08-25
- NPI record certified
- 2025-08-25
This is when the NPI record was last certified, not a medical board exam.
Extra NPI addresses: 1133 E Stanley Blvd, Livermore, CA, 94550 · 2452 Watson Ct, Palo Alto, CA, 94303