Howard Yuan-Hao Chang, MD
Dermatology · Stanford
- Medicare standing
- Clear
- Enrolled, allowed to bill and order, not excluded
- Plans that list them
- 1
- 1 carrier
- Office
- 1
Offices
1 location
Plans that list them
1 plan · 1 carrier
A missing listing does not mean out of network. Directories change, and a listing does not cover every office. Call Dr. Chang’s office at (650) 723-4000 to confirm they take your plan. Ask about the office you use, its medical group, referrals and appointments.
| DualConnect (HMO D-SNP) | Santa Clara Family Health Plan | Listed | Sep 1, 2026 |
California Medical Board record
Licence A76256 · Current
Licensed to practise in California · since 2001 · expires 2029-01-31 · Harvard Medical School.
No disciplinary actions, convictions, malpractice judgments or citations in this record.
Original Medicare doctor bills
$3,192
Medicare paid this office $3,192 for 33 people.
This is what Medicare paid the clinician — not Medicare Advantage, and not the pharmacy.
| Short return visit (20+ min) | 28 | $1,650 | $47 |
| Destruction of precancer skin growth, 1 growth | 18 | $849 | $37 |
| Destruction of precancer skin growth, 2-14 growths | 15 | $116 | $1 |
Who their Medicare patients are
33 Original Medicare patients in 2024. Average age 73 · Women 36% · Health risk score 1.47. Sicker patients than 9 in 10 peers; the typical dermatology clinician is at 1.01.
Conditions among them: High blood pressure 52%.
The office billed $15,009, Medicare allowed $5,071 and paid $3,192; for 150 services of 9 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 | 33 | 150 | 73 | 1.47 | $15,009 | $3,192 |
| 2023 | 25 | 122 | 77 | 1.48 | $12,771 | $3,081 |
| 2022 | 37 | 188 | 74 | 1.24 | $19,615 | $4,071 |
| 2021 | 39 | 196 | 75 | 1.10 | $20,632 | $4,713 |
| 2020 | 34 | 96 | 75 | 0.97 | $15,467 | $2,055 |
| 2019 | 42 | 180 | 73 | 1.08 | $16,310 | $4,563 |
| 2018 | 35 | 162 | 72 | 0.93 | $13,146 | $3,562 |
| 2017 | 28 | 171 | 76 | 0.92 | $14,054 | $3,417 |
| 2016 | 44 | 222 | 74 | 1.14 | $19,684 | $4,688 |
| 2015 | 50 | 255 | 75 | 1.11 | $22,707 | $5,136 |
| 2014 | 50 | 208 | 74 | 1.04 | $19,380 | $4,773 |
| 2013 | 47 | 218 | 73 | 1.10 | $21,637 | $5,531 |
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: 3 services
| Short return visit (20+ min) | 19 | $1,140 | $54 |
| Destruction of precancer skin growth, 1 growth | 14 | $573 | $36 |
| Destruction of precancer skin growth, 2-14 growths | 12 | $94 | $2 |
2022: 3 services
| Short return visit (20+ min) | 32 | $1,750 | $45 |
| Destruction of precancer skin growth, 1 growth | 18 | $797 | $35 |
| Destruction of precancer skin growth, 2-14 growths | 15 | $147 | $1 |
2021: 3 services
| Short return visit (20+ min) | 36 | $2,130 | $50 |
| Destruction of precancer skin growth, 1 growth | 25 | $1,286 | $46 |
| Destruction of precancer skin growth, 2-14 growths | 21 | $191 | $2 |
2020: 1 service
| Short return visit (20+ min) | 24 | $1,092 | $32 |
2019: 3 services
| Short return visit (20+ min) | 36 | $1,929 | $41 |
| Destruction of precancer skin growth, 1 growth | 22 | $1,465 | $49 |
| Destruction of precancer skin growth, 2-14 growths | 20 | $167 | $2 |
2018: 3 services
| Short return visit (20+ min) | 32 | $1,751 | $40 |
| Destruction of precancer skin growth, 1 growth | 20 | $1,023 | $38 |
| Destruction of precancer skin growth, 2-14 growths | 13 | $127 | $2 |
2017: 3 services
| Short return visit (20+ min) | 22 | $1,090 | $34 |
| Destruction of precancer skin growth, 1 growth | 19 | $1,080 | $39 |
| Destruction of precancer skin growth, 2-14 growths | 18 | $163 | $2 |
2016: 4 services
| Short return visit (20+ min) | 36 | $2,016 | $40 |
| Destruction of precancer skin growth, 1 growth | 21 | $1,099 | $33 |
| Destruction of skin growth, 1-14 growths | 13 | $813 | $58 |
| Destruction of precancer skin growth, 2-14 growths | 18 | $189 | $2 |
2015: 3 services
| Short return visit (20+ min) | 40 | $2,066 | $40 |
| Destruction of precancer skin growth, 1 growth | 26 | $1,327 | $37 |
| Destruction of precancer skin growth, 2-14 growths | 23 | $237 | $2 |
2014: 3 services
| Short return visit (20+ min) | 40 | $2,255 | $42 |
| Destruction of precancer skin growth, 1 growth | 22 | $1,134 | $44 |
| Destruction of precancer skin growth, 2-14 growths | 19 | $202 | $2 |
2013: 4 services
| Short return visit (20+ min) | 37 | $2,246 | $37 |
| Destruction of precancer skin growth, 1 growth | 20 | $1,230 | $42 |
| Destruction of skin growth, 1-14 growths | 11 | $589 | $49 |
| Destruction of precancer skin growth, 2-14 growths | 15 | $347 | $4 |
Money from drug and device companies
$172 in 2025
| 2025 | 2 | 2 | None | $172 |
| 2024 | 2 | 2 | $5,000 | $5,236 |
| 2022 | 1 | 1 | $1,000 | $1,000 |
| 2021 | 1 | 1 | $2,500 | $2,500 |
Paid work is consulting, speaking, honoraria and royalties, as opposed to meals and travel.
A payment is not proof that care is biased.
| Abbvie | None | $149 | 1 payment
|
| Neurocrine BioSciences | Ingrezza | $23 | 1 payment
|
See all 2 published payments
| Neurocrine BioSciences | Meals · 2025-09-29 | Ingrezza | $23 |
| Abbvie | Meals · 2025-04-18 | None | $149 |
See earlier years (2024, 2022, 2021)
2024: $5,236
| Alexion Pharmaceuticals | None | $5,000 | 1 payment
|
| Abbvie | None | $236 | 1 payment
|
2022: $1,000
| Pfizer | None | $1,000 | 1 payment
|
2021: $2,500
| Boehringer Ingelheim Pharmaceuticals | None | $2,500 | 1 payment
|
Checkups this office reported
Medicare did not publish checkup rates for this clinician.
- Medicare’s overall office score
- 76.5 / 100
- Scores the office’s reporting and systems. It is not a grade for how the doctor treats you.
Professional record
- NPI
- 1326061144
- Licence
- CA A76256California A76256: Current · expires 2029-01-31
More record details
- Sole proprietor
- No
- Taxonomy
- Federal specialty code 207N00000X (207N00000X)
- Mailing address
- 269 Campus Drive, Ccsr 2155c, Stanford, CA, 94305
- NPI first listed
- 2006-07-25
- NPI last updated
- 2024-04-16
- NPI record certified
- 2024-04-16
This is when the NPI record was last certified, not a medical board exam.
Extra NPI addresses: 440 Broadway St Fl B4, Redwood City, CA, 94063 · 900 Blake Wilbur, Stanford, CA, 94305