Doctor profile · Federal record
Dr. Diana Chang
Endocrinology, Diabetes & Metabolism Physician (CMS: Endocrinology) · Ventura, CA
- NPI 1396142386
- Accepts Medicare
- MIPS 84.9 / 100 · 2023
- 10 yrs in practice
- Female
- Solo practice
- No sanctions
Practice & contact
- Primary practice
-
6633 Telephone RD Ste 200
Ventura, CA 930035569
(805) 642-8252
fax (805) 642-8237 - Mailing address
-
5767 W Century Blvd Ste 400
Los Angeles, CA 900455631
Credentials & registration
- NPI registered
- November 2014 — 12 yrs on file
- Profile last updated
- July 8, 2021
- Year of graduation
- 2016 — 10 yrs since
- Specialty taxonomy
- 207RE0101X — NUCC code
- State license (1)
- California #A154454
Federal sanctions & exclusions
No sanctions, exclusions or revocations on file
Checked against OIG LEIE on NPI 1396142386. Last verified May 11, 2026.Medicare procedures · 2023
Top services delivered
Total services
2,329
Distinct HCPCS
10
Medicare allowed
$119,172
| HCPCS | Description | Services | Patients | Avg allowed | |
|---|---|---|---|---|---|
J0897 |
Injection, denosumab, 1 mg | 1,380 | 18 | $23 | |
99214 |
Established patient office or other outpatient visit, 30-39 minutes | 302 | 156 | $141 | |
99232 |
Subsequent hospital care with moderate levelof medical decision making, if using time, at least 35 minutes | 124 | 33 | $85 | |
83036 |
Hemoglobin a1c level | 116 | 76 | $10 | |
82947 |
Blood glucose (sugar) level | 109 | 72 | $4 | |
95251 |
Continuous monitoring of blood sugar level in tissue fluid using sensor under skin with interpretation and report | 91 | 36 | $37 | |
99215 |
Established patient office or other outpatient visit, 40-54 minutes | 80 | 61 | $197 | |
96372 |
Injection of drug or substance under skin or into muscle | 51 | 27 | $16 | |
99204 |
New patient office or other outpatient visit, 45-59 minutes | 46 | 46 | $179 | |
99222 |
Initial hospital care with straightforward or low-level medical decision making, if using time, at least 55 minutes | 30 | 28 | $139 |
In context: peer comparison
Among 5 peers in this city , average services per provider: 838. This provider delivers 2.8× the peer median.Open Payments
Industry payments received
All-time total
$47
Transactions
1
Manufacturers
1
| Payer (manufacturer) | Industry | Txns | Amount |
|---|---|---|---|
| Stryker Corporation | 1 | $47.27 |
By nature of payment
Medicare Part D · 2023
Top prescriptions
Total claims
1,131
Patients
415
Total drug cost
$556,663
| Drug | Type | Claims | Patients | Total cost |
|---|---|---|---|---|
| Metformin Hcl Er (Metformin Hcl) | Brand | 176 | 71 | $3,503 |
| Levothyroxine Sodium | Generic | 147 | 50 | $2,645 |
| Jardiance (Empagliflozin) | Brand | 133 | 46 | $174,371 |
| Ozempic (Semaglutide) | Brand | 89 | 21 | $112,120 |
| Metformin Hcl | Generic | 73 | 33 | $1,856 |
| Trulicity (Dulaglutide) | Brand | 73 | 24 | $121,301 |
| Nano 2nd Gen Pen Needle (Pen Needle, Diabetic) | Brand | 71 | 29 | $7,495 |
| Atorvastatin Calcium | Generic | 58 | 25 | $876 |
| Alendronate Sodium | Generic | 54 | 22 | $612 |
| Glipizide Er (Glipizide) | Brand | 51 | 19 | $837 |
Hospital affiliations
Frequently asked questions
What is Dr. Diana Chang's medical specialty?
Dr. Diana Chang practices Endocrinology, Diabetes & Metabolism Physician in Ventura, CA.
Where does Dr. Diana Chang practice?
Dr. Diana Chang practices at 6633 Telephone RD Ste 200, Ventura, CA 930035569. Office phone: 8056428252.
What is Dr. Diana Chang's NPI?
Dr. Diana Chang's National Provider Identifier (NPI) is 1396142386, issued by NPPES.
Does Dr. Diana Chang accept Medicare assignment?
Yes. Dr. Diana Chang accepts Medicare assignment, meaning Medicare-allowed amounts are accepted as full payment for covered services.
What procedures does Dr. Diana Chang commonly perform?
Top Medicare-reported procedures in 2023: Injection, denosumab, 1 mg (HCPCS J0897); Established patient office or other outpatient visit (HCPCS 99214); Subsequent hospital care with moderate levelof medical decision making (HCPCS 99232). Source: CMS Medicare Physician & Other Practitioners file.