Joseph Chao, MD
NPI 1861805210 · Dermatology Physician · San Francisco, CA
Enrolled with Medicare as Practitioner - Dermatology · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Joseph Chao, MD is a Dermatology Physician provider in San Francisco, CA (NPI 1861805210).
Provider details
- NPI number
- 1861805210
- Entity type
- Individual
- Primary specialty
- Dermatology PhysicianAllopathic & Osteopathic Physicians
- Credential
- MD
- Sex
- Male
- Sole proprietor
- No
- License
- A154992 (CA)
Specialties & taxonomies
Allopathic & Osteopathic Physicians
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure25% of score
12 yrs in NPPES registry
- Profile completeness25% of score
100% of core fields populated
- Practice footprint15% of score
2 documented practice locations
- Medicare service volume (vs. specialty peers)25% of score
1,527 Medicare services, 2024 (ranked within specialty)
- Open Payments transparency10% of score
Has Open Payments disclosures (2024)
Medicare volume is ranked against active providers in the same specialty. Signals a provider has no public data for (e.g. Medicare claims) are left out of the score entirely — never counted as zero — so providers without that data are not penalized. See the full formula and weights in our .
What this provider does (Medicare)
Based on Medicare fee-for-service claims, 2024; not all care is captured.
| Service (HCPCS) | Medicare services | Typical Medicare-allowed (2024) |
|---|---|---|
| Established Patient Office Or Other Outpatient Visit With Moderate Level of Decision Making, If Using Time, 30 Minutes Or More99214 | 550 | $153 |
| 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'SG2211 | 346 | $19 |
| New Patient Office Or Other Outpatient Visit With Moderate Level of Medical Decision Making, If Using Time, 45 Minutes Or More99204 | 160 | $197 |
| Destruction of Precancer Skin Growth, 2-14 Growths17003 | 90 | $9 |
| Biopsy of Related Skin Growth, First Growth11102 | 73 | $121 |
What this provider prescribes (Medicare Part D)
Top drugs by Medicare Part D claim volume, 2024 · 13 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Fluorouracil | 177 | 141 |
| Triamcinolone Acetonide | 100 | 69 |
| Clobetasol Propionate | 86 | 47 |
| Ketoconazole | 65 | 38 |
| Calcipotriene | 60 | 19 |
| Dupilumabbrand: Dupixent Pen | 57 | — |
| Betamethasone Dipropionate | 35 | 22 |
| Hydrocortisone |
Transparency — industry payments
Based on CMS Open Payments, 2024; not all care is captured.
$3,923 across 150 records (Open Payments 2024)
Open Payments discloses payments and transfers of value (meals, travel, consulting, research, royalties) from drug and device makers to providers. This is a transparency signal, not a verdict — such payments are legal and common, and their presence is neither an endorsement nor a criticism. Source: CMS Open Payments, program year 2024.
Practice location
Mailing address
Additional practice locations (1)
- 1580 Valencia St Ste 601San Francisco, CA 94110-4422Phone: (415) 600-5778Fax: (415) 369-1385
Registry dates
- Enumerated
- 2014-06-03
- Last updated
- 2023-03-07
- Certified
- 2021-05-26
Frequently asked questions
- What is Joseph Chao's NPI number?
- Joseph Chao's National Provider Identifier (NPI) is 1861805210, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Joseph Chao's specialty?
- Joseph Chao is listed in the NPPES registry with a primary specialty of Dermatology Physician (Allopathic & Osteopathic Physicians).
- Where is Joseph Chao located?
- Joseph Chao's practice location on file with NPPES is 1100 Van Ness Ave Fl 6, San Francisco, CA 94109-6978.
- What is Joseph Chao's phone number?
- The practice phone number listed in the NPPES registry for Joseph Chao is (415) 600-5778.
- Does Joseph Chao accept Medicare?
- Joseph Chao is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Joseph Chao's NPI active?
- Yes — Joseph Chao's NPI (1861805210) is active in the NPPES registry as of the last update on 2023-03-07.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.