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Edit this profileAt a glance
- 1825 4Th St Fl 6, San Francisco, CA 94143
About Dr. Chang
Based in San Francisco, CA, Irene J. Chang, M.D. is listed in the NPI registry under clinical genetics. Medicare claims data shows Irene provided 61 services to 25 patients. The services billed most often include prolonged office or other outpatient evaluation and management service(s) beyond the maximum required time of the primary procedure which has been selected using total time on the date of the primary service; each additional 15 minutes by the physician or and established patient office or other outpatient visit with high level of medical decision making, if using time, 40 minutes or more. NPI 1033539671 identifies this record in the national registry.
Factual summary compiled by Guide.md from public records; not written by this provider.
Education & Training
Specialty
Credentials & Licensing
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) 476-2757
- Email not available
Is this your home address or personal number? Hide it
Practice Locations
1825 4TH ST FL 6
San Francisco, CA 94143
Procedures Most Often Billed to Medicare
61 services · 25 patients · 2 distinct codes
| Procedure | Type | Code | Services | Compared with peers |
|---|---|---|---|---|
| Prolonged office or other outpatient evaluation and management service(s) beyond the maximum required time of the primary procedure which has been selected using total time on the date of the primary service; each additional 15 minutes by the physician or | Billing code | G2212 |
46 | Too few peers to compare |
| Established patient office or other outpatient visit with high level of medical decision making, if using time, 40 minutes or more | Office visit | 99215 |
15 | Less often than most peers in Clinical Genetics |
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.
Other clinical geneticses at this location 1
Same specialty, same street address — most likely the same department or group.
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 clinical geneticses in San Francisco 7
Same specialty, same city.
More connections — 15 related providers in 2 groups
Trained at Other 7
Other providers in the same specialty who trained at the same institution.
Class of 2014 at Other 8
Providers who graduated from the same medical school in the same year.
Common questions
What kind of doctor is Irene J. Chang?
Irene J. Chang is a clinical genetics in San Francisco, CA. That is the designation recorded for this NPI in the federal registry.
NPI registry
What is Irene J. Chang's address?
Irene J. Chang is listed at 1825 4Th St Fl 6, San Francisco, CA 94143. Addresses come from the NPI registry and can lag a move, so confirm before travelling.
NPI registry
How can I make an appointment with Irene J. Chang?
The number on file is (415) 476-2757. Contact the office directly to confirm availability and scheduling.
NPI registry
What is the NPI for Irene J. Chang?
Irene J. Chang's National Provider Identifier is 1033539671. 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 Irene J. Chang train?
Irene J. Chang attended Other, graduating in 2014. This comes from the CMS National Downloadable File.
CMS public data
How much experience does Irene J. Chang have?
Irene J. Chang has 12 years experience. Calculated from a graduation year of 2014, reported in the CMS National Downloadable File.
CMS public data
What procedures does Irene J. Chang perform?
According to Medicare billing data, Irene J. 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
Is Irene J. Chang's profile verified?
Not yet. This profile is built from public federal data and has not been confirmed by Irene J. Chang. If this is you, claiming it is free.
Guide.md
Guide.md listings do not constitute medical advice or an endorsement.