Patty Peng-Jung Chi, MD
Allergy/Immunology · Mountain View
- Medicare standing
- Clear
- Enrolled, allowed to bill and order, not excluded
- Plans that list them
- 4
- 4 carriers
- Office
- 1
Offices
1 location · Sutter Bay Medical Foundation · 3,783 clinicians in this group
Plans that list them
4 plans · 4 carriers
A missing listing does not mean out of network. Directories change, and a listing does not cover every office. Call Dr. Chi’s office at (650) 691-6174 to confirm they take your plan. Ask about the office you use, its medical group, referrals and appointments.
4 of 4 plans
| Alignment Health Sutter Advantage +More (HMO) | Alignment Health Plan | Listed | Oct 3, 2026 |
| Anthem Full Dual Advantage Aligned (HMO D-SNP) | Anthem Blue Cross | 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 A82242 · Current
Licensed to practise in California · since 2003 · expires 2028-12-31 · University of California San Francisco School of Medicine.
No disciplinary actions, convictions, malpractice judgments or citations in this record.
Original Medicare doctor bills
$44,248
Medicare paid this office $44,248 for 165 people.
This is what Medicare paid the clinician — not Medicare Advantage, and not the pharmacy.
| Return visit (30+ min) | 52 | $10,200 | $112 |
| Professional service for multiple injections of allergen | 77 | $4,929 | $12 |
| Professional service for preparation and provision of 1 or more antigens | 11 | $4,123 | $15 |
| Test for allergy using allergenic extract | 19 | $3,457 | $4 |
| New patient visit (45+ min) | 19 | $2,853 | $150 |
See all 8 services
| Return visit (30+ min) | 52 | $10,200 | $112 |
| Professional service for multiple injections of allergen | 77 | $4,929 | $12 |
| Professional service for preparation and provision of 1 or more antigens | 11 | $4,123 | $15 |
| Test for allergy using allergenic extract | 19 | $3,457 | $4 |
| New patient visit (45+ min) | 19 | $2,853 | $150 |
| Short return visit (20+ min) | 15 | $1,212 | $81 |
| Professional service for single injection of allergen | 18 | $963 | $10 |
| Test to measure the level of nitric oxide gas | 18 | $525 | $20 |
Who their Medicare patients are
165 Original Medicare patients in 2024. Average age 73 · Women 70% · Health risk score 0.95. At or below the middle of the specialty; the typical allergy/ immunology clinician is at 1.
Conditions among them: High blood pressure 54% · Diabetes 21% · Cancer 17% · Coronary heart disease 16% · COPD 15% · Depression 15% · Chronic kidney disease 13% · Atrial fibrillation 8%.
The office billed $187,295, Medicare allowed $58,435 and paid $44,248; for 2,433 services of 23 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 | 165 | 2,433 | 73 | 0.95 | $187,295 | $44,248 |
| 2023 | 171 | 1,842 | 73 | 0.81 | $133,254 | $33,910 |
| 2022 | 198 | 4,768 | 73 | 0.87 | $391,355 | $97,707 |
| 2021 | 87 | 2,487 | 73 | 0.89 | $124,412 | $42,175 |
| 2020 | 80 | 3,309 | 74 | 0.83 | $172,789 | $67,989 |
| 2019 | 47 | 2,368 | 73 | 0.83 | $90,156 | $51,389 |
| 2018 | 65 | 767 | 74 | 0.89 | $23,725 | $9,477 |
| 2017 | 57 | 557 | 72 | 0.77 | $17,425 | $7,272 |
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: 7 services
| Return visit (30+ min) | 57 | $10,244 | $114 |
| Professional service for multiple injections of allergen | 77 | $4,259 | $12 |
| New patient visit (45+ min) | 29 | $4,039 | $139 |
| Test for allergy using allergenic extract | 21 | $3,658 | $4 |
| Short return visit (20+ min) | 25 | $2,328 | $83 |
| Professional service for single injection of allergen | 19 | $794 | $10 |
| Test to measure the level of nitric oxide gas | 11 | $269 | $21 |
2022: 10 services
| Injection, omalizumab, 5 mg | 17 | $48,006 | None |
| Return visit (30+ min) | 76 | $10,386 | $104 |
| Test for allergy using allergenic extract | 27 | $5,595 | $4 |
| New patient visit (45+ min) | 23 | $3,322 | $144 |
| Short return visit (20+ min) | 16 | $1,487 | $83 |
| Professional service for preparation and provision of 1 or more antigens | 14 | $1,209 | $13 |
| Injection of drug or substance under skin or into muscle | 26 | $1,153 | $13 |
| Professional service for multiple injections of allergen | 58 | $1,112 | $10 |
| Test for allergy using allergenic extract injected into skin | 18 | $923 | $9 |
| Professional service for single injection of allergen | 13 | $222 | $6 |
2021: 7 services
| Return visit (30+ min) | 63 | $14,413 | $110 |
| Test for allergy using allergenic extract | 24 | $5,905 | $4 |
| New patient visit (45+ min) | 18 | $2,625 | $146 |
| Test to measure rate of airflow | 29 | $1,806 | $39 |
| Professional service for multiple injections of allergen | 18 | $1,700 | $11 |
| Test for allergy using allergenic extract injected into skin | 21 | $1,326 | $9 |
| Short return visit (20+ min) | 14 | $1,214 | $81 |
2020: 9 services
| Return visit (30+ min) | 63 | $9,905 | $93 |
| Professional service for preparation and provision of 1 or more antigens | 17 | $6,852 | $14 |
| Test for allergy using allergenic extract | 15 | $3,901 | $4 |
| Professional service for multiple injections of allergen | 17 | $2,058 | $11 |
| New patient visit (45+ min) | 12 | $1,659 | $138 |
| Test to measure rate of airflow | 24 | $1,521 | $35 |
| Short return visit (20+ min) | 18 | $1,466 | $64 |
| Test for allergy using allergenic extract injected into skin | 14 | $776 | $8 |
| Test to measure the level of nitric oxide gas | 12 | $234 | $20 |
2019: 5 services
| Return visit (30+ min) | 31 | $3,812 | $100 |
| Professional service for preparation and provision of 1 or more antigens | 16 | $2,614 | $15 |
| Test to measure rate of airflow | 20 | $917 | $38 |
| Professional service for multiple injections of allergen | 17 | $662 | $11 |
| Test to measure the level of nitric oxide gas | 11 | $252 | $21 |
2018: 5 services
| Return visit (30+ min) | 17 | $2,067 | $98 |
| Professional service for preparation and provision of 1 or more antigens | 44 | $2,006 | $12 |
| Test for allergy using allergenic extract | 11 | $1,623 | $6 |
| Professional service for multiple injections of allergen | 38 | $812 | $10 |
| Professional service for single injection of allergen | 13 | $204 | $7 |
2017: 2 services
| Professional service for preparation and provision of 1 or more antigens | 44 | $2,318 | $13 |
| Professional service for multiple injections of allergen | 41 | $882 | $11 |
Medicaid work
$1,259 in 2022
Medicaid paid $1,259 for 21 billed services this clinician did in 2022, up to 21 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.
| Return visit (30+ min) | 21 | $1,259 |
| 2022 | 21 | 1 | 21 | $1,259 |
| 2021 | 335 | 2 | 18 | $9,153 |
| 2020 | 310 | 2 | 16 | $6,727 |
| 2019 | 333 | 6 | 19 | $20,824 |
See the largest Medicaid services in earlier years
2021
| OFF/OP EST MAY X REQ PHY/QHP | 272 | $5,574 |
| Return visit (30+ min) | 63 | $3,579 |
2020
| OFF/OP EST MAY X REQ PHY/QHP | 296 | $6,203 |
| Chemotherapy administration, subcutaneous or intramuscular; non-hormonal anti-neoplastic | 14 | $524 |
2019
| ANTIGEN THERAPY SERVICES | 120 | $16,408 |
| Return visit (30+ min) | 28 | $1,680 |
| Professional services for allergen immunotherapy not including provision of allergenic extracts; 2 or more injections | 103 | $1,274 |
| OFF/OP EST MAY X REQ PHY/QHP | 25 | $527 |
| Chemotherapy administration, subcutaneous or intramuscular; non-hormonal anti-neoplastic | 14 | $516 |
| Total vital capacity | 43 | $419 |
Drugs they prescribed that Part D paid
$187,441
Pharmacies billed $187,441 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 418) in 2024. At or below the middle of the specialty; the typical allergy/ immunology clinician is at 0%.
212 generic and 206 brand-name prescriptions · $187,441 in drug cost · 25 antibiotic prescriptions.
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.
| Dupixent | 27 | $99,583 | $3,688 |
| Trelegy Ellipta | 15 | $20,185 | $1,346 |
| Advair Hfa | 29 | $13,239 | $457 |
| Spiriva Respimat | 13 | $10,540 | $811 |
| Alvesco | 12 | $6,600 | $550 |
See all 14 drugs
| Dupixent | 27 | $99,583 | $3,688 |
| Trelegy Ellipta | 15 | $20,185 | $1,346 |
| Advair Hfa | 29 | $13,239 | $457 |
| Spiriva Respimat | 13 | $10,540 | $811 |
| Alvesco | 12 | $6,600 | $550 |
| Qvar Redihaler | 12 | $6,428 | $536 |
| Azelastine | 42 | $1,223 | $29 |
| Flunisolide | 12 | $987 | $82 |
| Fluticasone Propionate | 30 | $873 | $29 |
| Albuterol Sulfate Hfa | 44 | $825 | $19 |
| Ipratropium | 21 | $573 | $27 |
| Montelukast | 33 | $506 | $15 |
| Amoxicillin-Clavulanate Potass | 11 | $112 | $10 |
| Prednisone | 17 | $85 | $5 |
Year by year
| 2024 | 418 | 60 | 0% (0) | 49% | $187,441 |
| 2023 | 388 | 77 | 0% (0) | 43% | $171,855 |
| 2022 | 498 | 109 | 0% (0) | 55% | $351,680 |
| 2021 | 524 | 81 | 0% (0) | 61% | $276,865 |
| 2020 | 667 | 89 | 0% (0) | 56% | $299,587 |
| 2019 | 398 | 80 | 0% (0) | 62% | $127,026 |
| 2018 | 145 | 44 | 0% (0) | 46% | $23,956 |
| 2017 | 216 | 38 | 0% (0) | 49% | $36,774 |
| 2016 | 221 | 44 | 0% (0) | 39% | $28,951 |
| 2015 | 252 | 49 | 0% (0) | 42% | $33,545 |
| 2014 | 148 | 47 | 0% (0) | 40% | $15,187 |
| 2013 | 110 | 31 | 0% (0) | 48% | $12,997 |
Part D prescriptions only. A drug prescribed to fewer than 11 people in a year is hidden.
See the drugs prescribed each year
2023: 13 drugs
| Dupixent | 15 | $54,272 | $3,618 |
| Trelegy Ellipta | 13 | $24,365 | $1,874 |
| Advair Hfa | 21 | $14,658 | $698 |
| Symbicort | 13 | $5,388 | $414 |
| Alvesco | 11 | $4,747 | $432 |
| Azelastine | 40 | $1,829 | $46 |
| Ipratropium | 29 | $948 | $33 |
| Albuterol Sulfate Hfa | 34 | $877 | $26 |
| Fluticasone Propionate | 33 | $829 | $25 |
| Montelukast | 26 | $478 | $18 |
| Amoxicillin-Clavulanate Potass | 11 | $167 | $15 |
| Azithromycin | 12 | $73 | $6 |
| Prednisone | 19 | $65 | $3 |
2022: 14 drugs
| Cuvitru | Immune globulin | 13 | $77,026 | $5,925 |
| Xolair | None | 12 | $28,628 | $2,386 |
| Trelegy Ellipta | None | 26 | $25,256 | $971 |
| Symbicort | None | 43 | $20,441 | $475 |
| Qvar Redihaler | None | 26 | $10,098 | $388 |
| Spiriva Respimat | None | 14 | $9,149 | $654 |
| Alvesco | None | 12 | $6,396 | $533 |
| Flovent Hfa | None | 11 | $5,879 | $534 |
| Azelastine | None | 44 | $2,615 | $59 |
| Ipratropium | None | 17 | $1,166 | $69 |
| Albuterol Sulfate Hfa | None | 30 | $1,127 | $38 |
| Montelukast | None | 52 | $1,090 | $21 |
| Fluticasone Propionate | None | 39 | $596 | $15 |
| Famotidine | None | 16 | $139 | $9 |
2021: 16 drugs
| Cuvitru | Immune globulin | 12 | $72,580 | $6,048 |
| Dupixent | None | 15 | $48,328 | $3,222 |
| Symbicort | None | 52 | $26,626 | $512 |
| Xolair | None | 11 | $25,905 | $2,355 |
| Trelegy Ellipta | None | 20 | $20,580 | $1,029 |
| Flovent Hfa | None | 28 | $13,353 | $477 |
| Qvar Redihaler | None | 30 | $9,233 | $308 |
| Advair Hfa | None | 16 | $9,107 | $569 |
| Epinephrine | None | 14 | $3,666 | $262 |
| Pulmicort Flexhaler | None | 12 | $3,302 | $275 |
| Azelastine | None | 54 | $2,523 | $47 |
| Albuterol Sulfate Hfa | None | 44 | $1,795 | $41 |
| Fluticasone Propionate | None | 60 | $1,180 | $20 |
| Montelukast | None | 21 | $348 | $17 |
| Olopatadine | None | 12 | $276 | $23 |
| Famotidine | None | 12 | $78 | $7 |
2020: 16 drugs
| Cuvitru | Immune globulin | 14 | $82,389 | $5,885 |
| Symbicort | None | 71 | $37,651 | $530 |
| Trelegy Ellipta | None | 24 | $23,561 | $982 |
| Spiriva Respimat | None | 26 | $19,845 | $763 |
| Flovent Hfa | None | 43 | $17,251 | $401 |
| Advair Hfa | None | 19 | $9,887 | $520 |
| Qvar Redihaler | None | 25 | $9,701 | $388 |
| Budesonide-Formoterol | None | 15 | $6,587 | $439 |
| Atrovent Hfa | None | 12 | $4,896 | $408 |
| Epinephrine | None | 13 | $3,805 | $293 |
| Azelastine | None | 79 | $3,664 | $46 |
| Pazeo | None | 11 | $3,041 | $276 |
| Ipratropium | None | 17 | $3,032 | $178 |
| Albuterol Sulfate Hfa | None | 27 | $1,170 | $43 |
| Fluticasone Propionate | None | 58 | $1,075 | $19 |
| Montelukast | None | 71 | $996 | $14 |
2019: 12 drugs
| Symbicort | 57 | $25,999 | $456 |
| Spiriva Respimat | 33 | $21,562 | $653 |
| Flovent Hfa | 17 | $4,711 | $277 |
| Pazeo | 14 | $3,869 | $276 |
| Azelastine | 25 | $1,536 | $61 |
| Proair Hfa | 17 | $1,149 | $68 |
| Ipratropium | 15 | $1,023 | $68 |
| Proair Respiclick | 11 | $699 | $64 |
| Ventolin Hfa | 11 | $642 | $58 |
| Montelukast | 41 | $592 | $14 |
| Fluticasone Propionate | 22 | $328 | $15 |
| Levocetirizine Dihydrochloride | 13 | $62 | $5 |
2018: 4 drugs
| Symbicort | 25 | $9,971 | $399 |
| Advair Diskus | 11 | $6,667 | $606 |
| Montelukast | 20 | $336 | $17 |
| Fluticasone Propionate | 27 | $246 | $9 |
2017: 7 drugs
| Symbicort | 33 | $10,475 | $317 |
| Advair Diskus | 16 | $8,606 | $538 |
| Flovent Diskus | 12 | $4,905 | $409 |
| Proair Hfa | 19 | $1,090 | $57 |
| Fluticasone Propionate | 67 | $977 | $15 |
| Montelukast | 17 | $355 | $21 |
| Ipratropium | 14 | $246 | $18 |
2016: 6 drugs
| Symbicort | 25 | $7,923 | $317 |
| Advair Diskus | 12 | $6,586 | $549 |
| Fluticasone Propionate | 88 | $1,060 | $12 |
| Proair Hfa | 17 | $929 | $55 |
| Montelukast | 13 | $437 | $34 |
| Ipratropium | 16 | $331 | $21 |
2015: 4 drugs
| Symbicort | 33 | $9,608 | $291 |
| Nasonex | 18 | $8,189 | $455 |
| Fluticasone Propionate | 74 | $833 | $11 |
| Montelukast | 30 | $302 | $10 |
2014: 2 drugs
| Fluticasone Propionate | 44 | $656 | $15 |
| Montelukast | 14 | $393 | $28 |
2013: 3 drugs
| Nasonex | 18 | $3,789 | $211 |
| Montelukast | 13 | $590 | $45 |
| Fluticasone Propionate | 14 | $394 | $28 |
Money from drug and device companies
$514 in 2025
| 2025 | 3 | 5 | None | $514 |
| 2024 | 1 | 7 | None | $159 |
| 2023 | 3 | 4 | None | $280 |
| 2022 | 7 | 15 | None | $337 |
| 2021 | 14 | 72 | None | $1,352 |
| 2020 | 13 | 22 | None | $609 |
| 2019 | 18 | 90 | None | $2,390 |
Paid work is consulting, speaking, honoraria and royalties, as opposed to meals and travel.
A payment is not proof that care is biased.
| GlaxoSmithKline | Nucala | $372 | 3 payments
|
| Takeda Pharmaceuticals U.S.A. | Cuvitru | $75 | 1 payment
|
| ARS Pharmaceuticals Operations | Neffy | $67 | 1 payment
|
See all 5 published payments
| GlaxoSmithKline | Meals · 2025-11-19 | None | $125 |
| GlaxoSmithKline | Meals · 2025-08-20 | Nucala | $122 |
| ARS Pharmaceuticals Operations | Meals · 2025-06-26 | Neffy | $67 |
| GlaxoSmithKline | Meals · 2025-06-25 | Nucala | $125 |
| Takeda Pharmaceuticals U.S.A. | Meals · 2025-02-10 | Cuvitru | $75 |
See earlier years (2024, 2023, 2022, 2021, 2020, 2019)
2024: $159
| Pfizer | Cibinqo | $159 | 7 payments
|
2023: $280
| AstraZeneca Pharmaceuticals LP | Tezspire | $125 | 1 payment
|
| Incyte | Opzelura | $125 | 1 payment
|
| Pfizer | Cibinqo | $31 | 2 payments
|
2022: $337
| Boehringer Ingelheim Pharmaceuticals | Stiolto Respimat | $89 | 4 payments
|
| AstraZeneca Pharmaceuticals LP | Fasenra | $75 | 4 payments
|
| GlaxoSmithKline | Nucala | $72 | 3 payments
|
| Regeneron Healthcare Solutions | Dupixent | $29 | 1 payment
|
| Genzyme | Dupixent | $25 | 1 payment
|
| kaleo | Auvi-Q | $24 | 1 payment
|
| Grifols USA | Prolastin-C Liquid | $23 | 1 payment
|
2021: $1,352
| AstraZeneca Pharmaceuticals LP | Breztri | $199 | 9 payments
|
| GlaxoSmithKline | Nucala | $195 | 8 payments
|
| Optinose US | Xhance | $193 | 16 payments
|
| Boehringer Ingelheim Pharmaceuticals | Spiriva Respimat | $162 | 9 payments
|
| kaleo | Auvi-Q | $119 | 5 payments
|
| Pfizer | Eucrisa | $107 | 4 payments
|
| Regeneron Healthcare Solutions | Dupixent | $96 | 4 payments
|
| Takeda Pharmaceuticals U.S.A. | Cuvitru | $72 | 3 payments
|
| Genentech USA | Xolair | $61 | 3 payments
|
| Covis Pharma GmBH | Alvesco | $58 | 2 payments
|
| Incyte | Opzelura | $25 | 1 payment
|
| Genzyme | Dupixent | $23 | 1 payment
|
| Merck Sharp & Dohme | None | $22 | 1 payment
|
| CSL Behring | Hizentra | $18 | 1 payment
|
2020: $609
| AstraZeneca Pharmaceuticals LP | Fasenra | $203 | 6 payments
|
| GlaxoSmithKline | Trelegy Ellipta | $74 | 3 payments
|
| Boehringer Ingelheim Pharmaceuticals | Spiriva Respimat | $73 | 3 payments
|
| Circassia Pharmaceuticals | Niox Vero | $51 | 1 payment
|
| Takeda Pharmaceuticals U.S.A. | Glassia | $30 | 1 payment
|
| Aimmune Therapeutics | Palforzia | $27 | 1 payment
|
| Mylan Specialty L.P. | Yupelri | $27 | 1 payment
|
| Genzyme | Dupixent | $24 | 1 payment
|
| Pfizer | Eucrisa | $22 | 1 payment
|
| kaleo | Auvi-Q | $22 | 1 payment
|
| Grifols USA | Prolastin-C Liquid | $21 | 1 payment
|
| Covis Pharma GmbH | Alvesco | $19 | 1 payment
|
| CSL Behring | Hizentra | $18 | 1 payment
|
2019: $2,390
| AstraZeneca Pharmaceuticals LP | Fasenra | $450 | 18 payments
|
| Shire North American Group | Hyqvia | $294 | 9 payments
|
| OptiNose US | Xhance | $262 | 12 payments
|
| GlaxoSmithKline | Nucala | $246 | 12 payments
|
| Genzyme | Dupixent | $246 | 3 payments
|
| Regeneron Healthcare Solutions | Dupixent | $155 | 3 payments
|
| Boehringer Ingelheim Pharmaceuticals | Spiriva Respimat | $141 | 2 payments
|
| Teva Pharmaceuticals USA | Cinqair | $119 | 4 payments
|
| Genentech USA | Xolair | $94 | 4 payments
|
| Sunovion Pharmaceuticals | Lonhala Magnair | $80 | 6 payments
|
| Novartis Pharmaceuticals | Xolair | $67 | 3 payments
|
| Pfizer | Eucrisa | $59 | 4 payments
|
| CSL Behring | Haegarda | $56 | 3 payments
|
| ALK-Abello | Odactra | $36 | 2 payments
|
| Mylan Specialty L.P. | Yupelri | $25 | 1 payment
|
| Bio Products Laboratory USA | Gammaplex | $25 | 1 payment
|
| Grifols USA | Prolastin-C Liquid | $20 | 1 payment
|
| Circassia Pharmaceuticals | Tudorza Pressair | $16 | 1 payment
|
Professional record
- NPI
- 1407898323
- Licence
- CA A82242California A82242: Current · expires 2028-12-31
- Trained
- University of California, San Francisco School of Medicine, 1999
- Video visits
- Lists video visits
- Gender
- Female
More record details
- Sole proprietor
- No
- Medicaid ID
- CA 00A822420
- Taxonomy
- Federal specialty code 207K00000X (207K00000X); Federal specialty code 207KA0200X (207KA0200X); Internal medicine (207R00000X)
- Mailing address
- 325 Distel Cir, Los Altos, CA, 94022
- NPI first listed
- 2006-06-12
- NPI last updated
- 2022-12-21
- NPI record certified
- 2022-12-21
This is when the NPI record was last certified, not a medical board exam.
This office lists an electronic records connection.