Doctor profile · Federal record
Dr. Joanne Chien, NP
Nurse Practitioner · Adult Health Nurse Practitioner · Stanford, CA
- NPI 1629399449
- Accepts Medicare
- MIPS 75.5 / 100 · 2023
- 18 yrs in practice
- Female
- Group practice
- No sanctions
Practice & contact
Operates at 2 locations .
- Primary practice
-
300 Pasteur Dr
Stanford, CA 943052200
(650) 723-4000 - Additional location
-
1765 Fumia CT
San Jose, CA 951311612
(408) 859-4436
Credentials & registration
- NPI registered
- June 2010 — 16 yrs on file
- Profile last updated
- December 30, 2025
- Year of graduation
- 2008 — 18 yrs since
- Specialty taxonomy
- 363L00000X — NUCC code
- State license (1)
- California #18364
Federal sanctions & exclusions
No sanctions, exclusions or revocations on file
Checked against OIG LEIE on NPI 1629399449. Last verified May 11, 2026.Medicare procedures · 2023
Top services delivered
Total services
490
Distinct HCPCS
2
Medicare allowed
$57,228
| HCPCS | Description | Services | Patients | Avg allowed | |
|---|---|---|---|---|---|
99214 |
Established patient office or other outpatient visit, 30-39 minutes | 264 | 178 | $96 | |
99215 |
Established patient office or other outpatient visit, 40-54 minutes | 226 | 144 | $141 |
In context: peer comparison
Among 150 peers in Stanford Nurse Practitioner, average services per provider: 60. This provider delivers 8.2× the peer median.Open Payments
Industry payments received
All-time total
$327
Transactions
3
Manufacturers
2
| Payer (manufacturer) | Industry | Txns | Amount |
|---|---|---|---|
| E.R. Squibb & Sons, L.L.C. | 2 | $213.45 | |
| Gilead Sciences, INC. | 1 | $113.52 |
By nature of payment
Medicare Part D · 2023
Top prescriptions
Total claims
1,027
Patients
277
Total drug cost
$1,250,691
| Drug | Type | Claims | Patients | Total cost |
|---|---|---|---|---|
| Prednisone | Generic | 298 | 86 | $2,504 |
| Abiraterone Acetate | Generic | 258 | 46 | $607,977 |
| Tamsulosin Hcl | Generic | 64 | 22 | $1,723 |
| Eliquis (Apixaban) | Brand | 54 | 12 | $42,367 |
| Ondansetron Hcl | Generic | 46 | 19 | $679 |
| Xtandi (Enzalutamide) | Brand | 38 | 0 | $523,245 |
| Gabapentin | Generic | 36 | 11 | $377 |
| Amlodipine Besylate | Generic | 35 | 11 | $278 |
| Bicalutamide | Generic | 33 | 16 | $1,062 |
| Triamcinolone Acetonide | Generic | 32 | 21 | $374 |
Hospital affiliations
Frequently asked questions
What is Dr. Joanne Chien's medical specialty?
Dr. Joanne Chien practices Nurse Practitioner in Stanford, CA.
Where does Dr. Joanne Chien practice?
Dr. Joanne Chien practices at 300 Pasteur Dr, Stanford, CA 943052200. Office phone: 6507234000.
What is Dr. Joanne Chien's NPI?
Dr. Joanne Chien's National Provider Identifier (NPI) is 1629399449, issued by NPPES.
Does Dr. Joanne Chien accept Medicare assignment?
Yes. Dr. Joanne Chien accepts Medicare assignment, meaning Medicare-allowed amounts are accepted as full payment for covered services.
What procedures does Dr. Joanne Chien 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 99215). Source: CMS Medicare Physician & Other Practitioners file.