Doctor profile · Federal record
Dr. Natalie Chang, M.D.
Internal Medicine Physician (CMS: Internal Medicine) · Walnut Creek, CA
- NPI 1548370786
- Accepts Medicare
- 29 yrs in practice
- Female
- Group practice
- No sanctions
Practice & contact
- Primary practice
-
1450 Treat Blvd, Suite 250B
Walnut Creek, CA 945972168
(925) 296-9740
fax (925) 296-9064 - Mailing address
-
Dept 34929, P. O. Box 39000
San Francisco, CA 941390001
Credentials & registration
- NPI registered
- August 2006 — 20 yrs on file
- Profile last updated
- April 2, 2014
- Year of graduation
- 1997 — 29 yrs since
- Specialty taxonomy
- 207R00000X — NUCC code
- State license (1)
- California #A67238
- Medicaid
- CA #00A672380
Federal sanctions & exclusions
No sanctions, exclusions or revocations on file
Checked against OIG LEIE on NPI 1548370786. Last verified May 11, 2026.Medicare procedures · 2023
Top services delivered
Total services
2,393
Distinct HCPCS
10
Medicare allowed
$184,858
| HCPCS | Description | Services | Patients | Avg allowed | |
|---|---|---|---|---|---|
99214 |
Established patient office or other outpatient visit, 30-39 minutes | 1,020 | 486 | $100 | |
99213 |
Established patient office or other outpatient visit, 20-29 minutes | 511 | 382 | $85 | |
G0439 |
Annual wellness visit, includes a personalized prevention plan of service (pps), subsequent visit | 377 | 377 | $13 | |
90694 |
Influenza vaccine, quadrivalent inactivated, 0.5 ml dosage | 114 | 112 | $75 | |
G0008 |
Administration of influenza virus vaccine | 113 | 111 | $36 | |
99215 |
Established patient office or other outpatient visit, 40-54 minutes | 57 | 50 | $124 | |
81002 |
Urinalysis, manual test | 35 | 32 | $3 | |
90677 |
Pneumococcal conjugate vaccine, 20 valent (pcv20), for intramuscular use | 30 | 30 | $281 | |
G0009 |
Administration of pneumococcal vaccine | 30 | 30 | $36 | |
93000 |
Routine electrocardiogram (ecg) using at least 12 leads with interpretation and report | 24 | 24 | $17 |
In context: peer comparison
Among 44 peers in Walnut Creek Internal Medicine Physician, average services per provider: 260. This provider delivers 9.2× the peer median.Open Payments
Industry payments received
All-time total
$59
Transactions
2
Manufacturers
2
| Payer (manufacturer) | Industry | Txns | Amount |
|---|---|---|---|
| Pfizer INC. | 1 | $37.93 | |
| Exact Sciences Corporation | 1 | $20.78 |
By nature of payment
Medicare Part D · 2023
Top prescriptions
Total claims
4,147
Patients
1,221
Total drug cost
$67,914
| Drug | Type | Claims | Patients | Total cost |
|---|---|---|---|---|
| Atorvastatin Calcium | Generic | 858 | 238 | $10,847 |
| Levothyroxine Sodium | Generic | 455 | 111 | $7,381 |
| Amlodipine Besylate | Generic | 309 | 92 | $2,738 |
| Lisinopril | Generic | 303 | 94 | $2,812 |
| Rosuvastatin Calcium | Generic | 301 | 98 | $11,440 |
| Losartan Potassium | Generic | 297 | 84 | $4,368 |
| Alendronate Sodium | Generic | 259 | 86 | $3,461 |
| Metformin Hcl ER (Metformin Hcl) | Brand | 257 | 76 | $5,372 |
| Hydrochlorothiazide | Generic | 226 | 68 | $1,179 |
| Omeprazole | Generic | 181 | 63 | $3,245 |
Hospital affiliations
Frequently asked questions
What is Dr. Natalie Chang's medical specialty?
Dr. Natalie Chang practices Internal Medicine Physician in Walnut Creek, CA.
Where does Dr. Natalie Chang practice?
Dr. Natalie Chang practices at 1450 Treat Blvd, Walnut Creek, CA 945972168. Office phone: 9252969740.
What is Dr. Natalie Chang's NPI?
Dr. Natalie Chang's National Provider Identifier (NPI) is 1548370786, issued by NPPES.
Does Dr. Natalie Chang accept Medicare assignment?
Yes. Dr. Natalie Chang accepts Medicare assignment, meaning Medicare-allowed amounts are accepted as full payment for covered services.
What procedures does Dr. Natalie Chang commonly perform?
Top Medicare-reported procedures in 2023: Established patient office or other outpatient visit (HCPCS 99214); Established patient office or other outpatient visit (HCPCS 99213); Annual wellness visit, includes a personalized prevention plan of service (pps), subsequent visit (HCPCS G0439). Source: CMS Medicare Physician & Other Practitioners file.