Doctor profile · Federal record
Dr. Alexander Chang, M.D.
Internal Medicine Physician (CMS: Internal Medicine) · Pediatrics Physician · San Francisco, CA
- NPI 1225356231
- Accepts Medicare
- 12 yrs in practice
- Male
- Solo practice
- No sanctions
Practice & contact
- Primary practice
-
909 Hyde St Ste 230
San Francisco, CA 941094845
(415) 779-8332
fax (415) 537-9078
Credentials & registration
- NPI registered
- May 2010 — 16 yrs on file
- Profile last updated
- July 27, 2023
- Year of graduation
- 2014 — 12 yrs since
- Specialty taxonomy
- 207R00000X — NUCC code
- State license (1)
- California #A127376
Federal sanctions & exclusions
No sanctions, exclusions or revocations on file
Checked against OIG LEIE on NPI 1225356231. Last verified May 11, 2026.Medicare procedures · 2023
Top services delivered
Total services
636
Distinct HCPCS
8
Medicare allowed
$84,213
| HCPCS | Description | Services | Patients | Avg allowed | |
|---|---|---|---|---|---|
99214 |
Established patient office or other outpatient visit, 30-39 minutes | 375 | 161 | $148 | |
G0439 |
Annual wellness visit, includes a personalized prevention plan of service (pps), subsequent visit | 82 | 82 | $153 | |
99213 |
Established patient office or other outpatient visit, 20-29 minutes | 70 | 44 | $93 | |
90694 |
Influenza vaccine, quadrivalent inactivated, 0.5 ml dosage | 27 | 27 | $73 | |
G0008 |
Administration of influenza virus vaccine | 26 | 26 | $36 | |
93000 |
Routine electrocardiogram (ecg) using at least 12 leads with interpretation and report | 25 | 23 | $17 | |
99215 |
Established patient office or other outpatient visit, 40-54 minutes | 16 | 14 | $210 | |
99204 |
New patient office or other outpatient visit, 45-59 minutes | 15 | 15 | $192 |
In context: peer comparison
Among 236 peers in this city , average services per provider: 93. This provider delivers 6.8× the peer median.Open Payments
Industry payments received
All-time total
$353
Transactions
12
Manufacturers
6
| Payer (manufacturer) | Industry | Txns | Amount |
|---|---|---|---|
| Lilly USA, LLC | 5 | $206.80 | |
| Novo Nordisk Inc | 2 | $44.25 | |
| PFIZER INC. | 2 | $40.24 | |
| Merck Sharp & Dohme LLC | 1 | $25.67 | |
| Boehringer Ingelheim Pharmaceuticals, Inc. | 1 | $21.22 | |
| Artivion, Inc. | 1 | $14.50 |
By nature of payment
Medicare Part D · 2023
Top prescriptions
Total claims
2,469
Patients
817
Total drug cost
$44,656
| Drug | Type | Claims | Patients | Total cost |
|---|---|---|---|---|
| Atorvastatin Calcium | Generic | 563 | 170 | $8,816 |
| Amlodipine Besylate | Generic | 318 | 94 | $3,619 |
| Losartan Potassium | Generic | 182 | 56 | $3,049 |
| Lisinopril | Generic | 170 | 56 | $1,644 |
| Metformin Hcl | Generic | 153 | 53 | $2,101 |
| Tamsulosin Hcl | Generic | 151 | 53 | $5,109 |
| Metoprolol Succinate | Generic | 134 | 42 | $3,796 |
| Simvastatin | Generic | 120 | 32 | $1,152 |
| Famotidine | Generic | 105 | 46 | $2,679 |
| Hydrochlorothiazide | Generic | 105 | 27 | $787 |
Hospital affiliations
Frequently asked questions
What is Dr. Alexander Chang's medical specialty?
Dr. Alexander Chang practices Internal Medicine Physician in San Francisco, CA.
Where does Dr. Alexander Chang practice?
Dr. Alexander Chang practices at 909 Hyde St Ste 230, San Francisco, CA 941094845. Office phone: 4157798332.
What is Dr. Alexander Chang's NPI?
Dr. Alexander Chang's National Provider Identifier (NPI) is 1225356231, issued by NPPES.
Does Dr. Alexander Chang accept Medicare assignment?
Yes. Dr. Alexander Chang accepts Medicare assignment, meaning Medicare-allowed amounts are accepted as full payment for covered services.
What procedures does Dr. Alexander Chang commonly perform?
Top Medicare-reported procedures in 2023: Established patient office or other outpatient visit (HCPCS 99214); Annual wellness visit, includes a personalized prevention plan of service (pps), subsequent visit (HCPCS G0439); Established patient office or other outpatient visit (HCPCS 99213). Source: CMS Medicare Physician & Other Practitioners file.