Clinical Genetics · San Francisco, CA
NPI
1033539671
Since 2014
Specialty
Clinical Genetics
Code 207SG0201X
Group practices
4
Medicare group memberships
Hospitals
1
Hospital affiliations
1825 4th St Fl 6
San Francisco, CA, 94143
Phone (415) 476-2757
Groups this clinician bills Medicare through
Medicare paid, 2024
$3,706
66 services
Medicare patients, 2024
15
Average age 56
Drug cost, 2024
$1.6M
47 prescriptions
Company payments, 2025
$9,587
From 7 companies
Procedures and visits billed to Original Medicare, 2024
In 2024, the most common Medicare service billed by Irene J Chang was code G2212 (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), 46 times for 14 patients. In total Irene J Chang billed 66 services in 3 codes, and Medicare paid $3,706.
Official US government data: the national provider registry and Medicare enrollment records, linked by NPI. Last update of this record: 2024-08-29.
| Code | Setting | Services | Patients | Paid per service | Medicare paid |
|---|---|---|---|---|---|
| G2212 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 | Facility | 46 | 14 | $26.56 | $1,222 |
| 99215 Office E&M - Established | Facility | 15 | 11 | $112.37 | $1,686 |
Medicare prescription drug claims, 2024
In 2024, the drug Irene J Chang prescribed most often to Medicare patients was Dojolvi (Triheptanoin), with 13 prescriptions and refills. In total Irene J Chang wrote 47 Medicare prescriptions that cost $1.6M.
| Drug | Claims | 30-day fills | Patients | Cost |
|---|---|---|---|---|
| Dojolvi Triheptanoin | 13 | 13 | Under 11 | $116K |
Brand drugs: 40 claims; generic drugs: - claims.
Money and other things of value reported by the companies
In 2025, drug and medical device companies paid Irene J Chang $9,587 ($9,587 in general payments such as food, travel and fees) from 7 companies. The largest payer was BioMarin Pharmaceutical Inc. with $5,475.
Official US government data on Original Medicare services, Medicare prescription drug plans and the payments drug and device companies must report. Services with fewer than 11 patients and drugs with fewer than 11 claims are not published. Procedure codes are shown by number with their public category.