Doctor profile · Federal record
Dr. Heidi Chang, MD
Obstetrics & Gynecology Physician (CMS: Obstetrics/Gynecology) · Walnut Creek, CA
- NPI 1649681982
- Accepts Medicare
- MIPS 84.1 / 100 · 2023
- 14 yrs in practice
- Female
- Solo practice
- No sanctions
Practice & contact
- Primary practice
-
2637 Shadelands Dr
Walnut Creek, CA 945982512
(925) 393-0033
fax (925) 301-8956
Credentials & registration
- NPI registered
- May 2014 — 12 yrs on file
- Profile last updated
- November 13, 2024
- Year of graduation
- 2012 — 14 yrs since
- Specialty taxonomy
- 207V00000X — NUCC code
- State license (1)
- California #A128445
Federal sanctions & exclusions
No sanctions, exclusions or revocations on file
Checked against OIG LEIE on NPI 1649681982. Last verified May 11, 2026.Medicare procedures · 2023
Top services delivered
Total services
183
Distinct HCPCS
6
Medicare allowed
$46,202
| HCPCS | Description | Services | Patients | Avg allowed | |
|---|---|---|---|---|---|
99213 |
Established patient office or other outpatient visit, 20-29 minutes | 91 | 52 | $106 | |
99204 |
New patient office or other outpatient visit, 45-59 minutes | 29 | 29 | $194 | |
58571 |
Removal of uterus, tubes, and/or ovaries through abdomen using an endoscope, 250.0 g or less | 20 | 20 | $1,026 | |
99205 |
New patient office or other outpatient visit, 60-74 minutes | 18 | 18 | $256 | |
38900 |
Imaging of lymph nodes during surgery | 14 | 14 | $190 | |
38570 |
Biopsy and removal of lymph nodes of abdominal cavity using an endoscope | 11 | 11 | $288 |
In context: peer comparison
Among 6 peers in Walnut Creek Obstetrics & Gynecology Physician, average services per provider: 54. This provider delivers 3.4× the peer median.Open Payments
Industry payments received
All-time total
$164
Transactions
6
Manufacturers
3
| Payer (manufacturer) | Industry | Txns | Amount |
|---|---|---|---|
| Merck Sharp & Dohme LLC | 3 | $79.04 | |
| AstraZeneca Pharmaceuticals Lp | 2 | $44.64 | |
| GlaxoSmithKline, LLC. | 1 | $39.99 |
By nature of payment
Medicare Part D · 2023
Top prescriptions
Total claims
57
Patients
55
Total drug cost
$239
| Drug | Type | Claims | Patients | Total cost |
|---|---|---|---|---|
| Ibuprofen | Generic | 26 | 26 | $114 |
| Oxycodone Hcl | Generic | 20 | 18 | $67 |
| Gabapentin | Generic | 11 | 11 | $58 |
Hospital affiliations
Frequently asked questions
What is Dr. Heidi Chang's medical specialty?
Dr. Heidi Chang practices Obstetrics & Gynecology Physician in Walnut Creek, CA.
Where does Dr. Heidi Chang practice?
Dr. Heidi Chang practices at 2637 Shadelands Dr, Walnut Creek, CA 945982512. Office phone: 9253930033.
What is Dr. Heidi Chang's NPI?
Dr. Heidi Chang's National Provider Identifier (NPI) is 1649681982, issued by NPPES.
Does Dr. Heidi Chang accept Medicare assignment?
Yes. Dr. Heidi Chang accepts Medicare assignment, meaning Medicare-allowed amounts are accepted as full payment for covered services.
What procedures does Dr. Heidi Chang commonly perform?
Top Medicare-reported procedures in 2023: Established patient office or other outpatient visit (HCPCS 99213); New patient office or other outpatient visit (HCPCS 99204); Removal of uterus, tubes, and/or ovaries through abdomen using an endoscope, 250.0 g or less (HCPCS 58571). Source: CMS Medicare Physician & Other Practitioners file.