Physician Profile
Kristoffer N. Chang, M.D.
Unclaimed ProfileAbout Dr. Chang
Kristoffer N. Chang, M.D. is a specialist based in San Francisco, CA. Kristoffer is a 1977 graduate of University of Utah School of Medicine. According to Medicare claims data, Kristoffer cared for 29 Medicare patients across 36 services. The services billed most often include established patient office or other outpatient visit with low level od decision making, if using time, 20 minutes or more and new patient office or other outpatient visit with low level of medical decision making, if using time, 30 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) 923-3860
- Email not available
Practice Locations
2100 WEBSTER ST SUITE#328
San Francisco, CA 94115
Procedures Most Often Billed to Medicare
36 services · 29 patients · 2 distinct codes
| Procedure | Type | Code | Services | Compared with peers |
|---|---|---|---|---|
| Established patient office or other outpatient visit with low level od decision making, if using time, 20 minutes or more | Office visit | 99213 |
19 | Less often than most peers in Specialist |
| New patient office or other outpatient visit with low level of medical decision making, if using time, 30 minutes or more | Office visit | 99203 |
17 | Less often than most peers in Specialist |
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 specialists in San Francisco 8
Same specialty, same city.
Trained at University of Utah School of Medicine 8
Other providers in the same specialty who trained at the same institution.
More connections — 7 related providers in 1 group
Class of 1977 at University of Utah School of Medicine 7
Providers who graduated from the same medical school in the same year.
Common questions
What does Kristoffer N. Chang specialize in?
Kristoffer N. Chang is a specialist in San Francisco, CA. That is the designation recorded for this NPI in the federal registry.
NPI registry
Where is Kristoffer N. Chang located?
Kristoffer N. Chang is listed at 2100 Webster St Suite#328, San Francisco, CA 94115. Addresses come from the NPI registry and can lag a move, so confirm before travelling.
NPI registry
What is Kristoffer N. Chang's phone number?
The number on file is (415) 923-3860. Guide.md cannot book appointments or pass on messages — please call the office directly.
NPI registry
What is Kristoffer N. Chang's NPI number?
Kristoffer N. Chang's National Provider Identifier is 1790761336. 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 Kristoffer N. Chang train?
Kristoffer N. Chang attended University of Utah School of Medicine, graduating in 1977. This comes from the CMS National Downloadable File.
CMS public data
How long has Kristoffer N. Chang been practicing?
Kristoffer N. Chang has 49 years experience. Calculated from a graduation year of 1977, reported in the CMS National Downloadable File.
CMS public data
What does Kristoffer N. Chang do most often?
According to Medicare billing data, Kristoffer N. 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 Kristoffer N. Chang confirmed this information?
Not yet. This profile is built from public federal data and has not been confirmed by Kristoffer N. 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.