Physician Profile
Aileen Y. Chang, M.D.
Unclaimed ProfileAbout Dr. Chang
Aileen Y. Chang, M.D. is a healthcare provider in San Francisco, CA specializing in dermatology. Aileen trained at Perelman School of Med at the University of Pennsylvania, graduating in 2012. According to Medicare claims data, Aileen cared for 93 Medicare patients across 134 services. The services billed most often include established patient office or other outpatient visit with straightforward medical decision making, if using time, 10 minutes or more and established patient office or other outpatient visit with low level od decision making, if using time, 20 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) 476-1000
- Email not available
Practice Locations
400 PARNASSUS AVE
San Francisco, CA 94143
3600 Spruce St 2 Maloney Building
Philadelphia, PA 19104
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
134 services · 93 patients · 2 distinct codes
| Procedure | Type | Code | Services | Compared with peers |
|---|---|---|---|---|
| Established patient office or other outpatient visit with straightforward medical decision making, if using time, 10 minutes or more | Office visit | 99212 |
72 | As often as other peers in Dermatology |
| Established patient office or other outpatient visit with low level od decision making, if using time, 20 minutes or more | Office visit | 99213 |
62 | Less often 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 Perelman School of Med at the University of Pennsylvania 8
Other providers in the same specialty who trained at the same institution.
More connections — 8 related providers in 1 group
Class of 2012 at Perelman School of Med at the University of Pennsylvania 8
Providers who graduated from the same medical school in the same year.
Common questions
What does Aileen Y. Chang specialize in?
Aileen Y. Chang 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
Where is Aileen Y. Chang located?
Aileen Y. Chang is listed at 400 Parnassus Ave, San Francisco, CA 94143. Addresses come from the NPI registry and can lag a move, so confirm before travelling.
NPI registry
What is Aileen Y. Chang's phone number?
The number on file is (415) 476-1000. Guide.md cannot book appointments or pass on messages — please call the office directly.
NPI registry
What is Aileen Y. Chang's NPI number?
Aileen Y. Chang's National Provider Identifier is 1871869156. 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 Aileen Y. Chang train?
Aileen Y. Chang attended Perelman School of Med at the University of Pennsylvania, graduating in 2012. This comes from the CMS National Downloadable File.
CMS public data
How long has Aileen Y. Chang been practicing?
Aileen Y. Chang has 14 years experience. Calculated from a graduation year of 2012, reported in the CMS National Downloadable File.
CMS public data
What does Aileen Y. Chang do most often?
According to Medicare billing data, Aileen Y. Chang the Medicare record under this individual NPI shows mainly office visits and diagnostic testing. Hospital-based physicians usually have their procedural work billed by the facility rather than under their own number, so this is a floor on their practice, not a description of it. This reflects Medicare patients only and is billing volume, not a measure of quality.
Medicare claims
Has Aileen Y. Chang confirmed this information?
Not yet. This profile is built from public federal data and has not been confirmed by Aileen Y. Chang. 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.