Physician Profile
Joseph T. Chao, MD
Unclaimed ProfileAbout Dr. Chao
Based in San Francisco, CA, Joseph T. Chao, MD is listed in the NPI registry under dermatology. Joseph graduated from University of Arizona College of Medicine in 2015. According to Medicare claims data, Joseph cared for 1,040 Medicare patients across 1,527 services. The services billed most often include established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more, 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', and new patient office or other outpatient visit with moderate level of medical decision making, if using time, 45 minutes or more.
Summarised automatically from public NPI registry and CMS Medicare data. Not written or reviewed by this provider. Claim this profile to replace it.
Education & Training
Specialty
Credentials & Licensing
License numbers are what the provider reported to NPPES when the NPI was issued or updated. NPPES does not verify licensure; confirm current standing with the state licensing board.
Medicare information
Exactly as CMS reports it (National Downloadable File, Opt-Out Affidavits, Order & Referring). Not an insurance directory; confirm coverage with the office.
Contact Information
- (415) 600-5778
- Email not available
Practice Locations
1100 VAN NESS AVE FL 6
San Francisco, CA 94109
1580 Valencia St Ste 601
San Francisco, CA 94110
Conditions Commonly Evaluated or Treated
Within Dermatology generally. Availability varies by clinician, training and location — this profile has not been claimed, so nothing here is a personal claim by the provider.
Conditions
Most searched conditions
Acne and follicular disorders
Eczema and inflammatory skin disease
Infections and infestations
Pigment, growths, and benign lesions
Skin cancer
Urticaria, itch, and vascular
Autoimmune and connective tissue
Infections
Rashes & allergy
Skin growths
Procedures & services
Most searched procedures
Diagnostic procedures
Lesion treatment
- Complex skin lesion excision
- Cryotherapy for skin lesions
- Electrodesiccation and curettage
- Incision and drainage of an abscess
Medical dermatology treatment
Cosmetic
Cosmetic and minor surgery
Cosmetic dermatology
Diagnostic
General dermatology
Infections
Medical dermatology
Nails & hair
Skin cancer surgery
Skin growths
Procedures Most Often Billed to Medicare
1,527 services · 1,040 patients · 12 distinct codes
| Procedure | Type | Code | Services | Compared with peers |
|---|---|---|---|---|
| Destruction of precancer skin growth, 2-14 growths | Procedure | 17003 |
90 | Less often than most peers in Dermatology |
| Destruction of skin growth, 1-14 growths | Procedure | 17110 |
73 | As often as other peers in Dermatology |
| Biopsy of related skin growth, first growth | Procedure | 11102 |
73 | As often as other peers in Dermatology |
| Destruction of precancer skin growth, 1 growth | Procedure | 17000 |
66 | Less often than most peers in Dermatology |
| Biopsy of related skin growth, each additional growth | Procedure | 11103 |
36 | As often as other peers in Dermatology |
| Punch biopsy, first skin growth | Procedure | 11104 |
16 | As often as other peers in Dermatology |
| Complicated repair of wound of trunk, 2.6-7.5 cm | Procedure | 13101 |
13 | Less often than most peers in Dermatology |
| Established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more | Office visit | 99214 |
550 | More than most peers in Dermatology |
| 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' | Billing code | G2211 |
346 | More than most peers in Dermatology |
| New patient office or other outpatient visit with moderate level of medical decision making, if using time, 45 minutes or more | Office visit | 99204 |
160 | More than most peers in Dermatology |
Source: CMS Medicare public data. Shows how often procedures were billed — not quality of care or patient satisfaction.
Related providers
Connections drawn from the registry and from what providers have told us. A link here is not a referral or an endorsement.
Also at this address 4
Providers at the same street address. Each files their own registry entry, so a shared practice often appears under several different names.
Other dermatologists in San Francisco 8
Same specialty, same city.
Trained at University of Arizona College of Medicine 8
Other providers in the same specialty who trained at the same institution.
More connections — 16 related providers in 2 groups
Class of 2015 at University of Arizona College of Medicine 8
Providers who graduated from the same medical school in the same year.
Also performs Destruction of precancer skin growth, 2-14 growths 8
Providers in CA who bill this service to Medicare most often.
Common questions
What kind of doctor is Dr. Chao?
Dr. Chao is a dermatologist (skin doctor) in San Francisco, CA. That is the designation recorded for this NPI in the federal registry, where it is listed as “Dermatology”.
NPI registry
What is Dr. Chao's address?
Dr. Chao is listed at 1100 Van Ness Ave Fl 6, San Francisco, CA 94109. Addresses come from the NPI registry and can lag a move, so confirm before travelling.
NPI registry
How can I make an appointment with Dr. Chao?
The number on file is (415) 600-5778. Guide.md cannot book appointments or pass on messages — please call the office directly.
NPI registry
What is Dr. Chao's NPI number?
Dr. Chao's National Provider Identifier is 1861805210. It is issued by the Centers for Medicare & Medicaid Services and is unique and permanent — it does not change if they move practice.
NPI registry
Where did Dr. Chao train?
Dr. Chao attended University of Arizona College of Medicine, graduating in 2015. This comes from the CMS National Downloadable File.
CMS public data
How long has Dr. Chao been practicing?
Dr. Chao has 11 years experience. Calculated from a graduation year of 2015, reported in the CMS National Downloadable File.
CMS public data
What procedures does Dr. Chao perform?
According to Medicare billing data, Dr. Chao performs procedures including destruction of precancer skin growth, 2-14 growths, destruction of skin growth, 1-14 growths and biopsy of related skin growth, first growth, alongside routine visits and testing. This reflects Medicare patients only and is billing volume, not a measure of quality.
Medicare claims
Has Dr. Chao confirmed this information?
Not yet. This profile is built from public federal data and has not been confirmed by Dr. Chao. If this is you, claiming it is free.
Guide.md
Provider data sourced from the NPPES NPI Registry and CMS public datasets. Information is provided for reference and is not medical advice.