Doctor profile · Federal record
Dr. Ryan Chiang, MD
Internal Medicine Physician (CMS: Internal Medicine) · Stanford, CA
- NPI 1891323986
- Accepts Medicare
- 6 yrs in practice
- Male
- Group practice
- No sanctions
Practice & contact
Operates at 2 locations .
- Primary practice
-
300 Pasteur Dr
Stanford, CA 943052200
(650) 723-4000 - Additional location
-
300 Pasteur Drive, Lane 154
Stanford, CA 943055133
(650) 723-6661
fax (650) 498-6205
Credentials & registration
- NPI registered
- April 2020 — 6 yrs on file
- Profile last updated
- April 18, 2024
- Year of graduation
- 2020 — 6 yrs since
- Specialty taxonomy
- 207R00000X — NUCC code
- State license (1)
- California #A185873
Federal sanctions & exclusions
No sanctions, exclusions or revocations on file
Checked against OIG LEIE on NPI 1891323986. Last verified May 11, 2026.Medicare procedures · 2023
Top services delivered
Total services
217
Distinct HCPCS
3
Medicare allowed
$30,843
| HCPCS | Description | Services | Patients | Avg allowed | |
|---|---|---|---|---|---|
99233 |
Subsequent hospital care with moderate levelof medical decision making, if using time, at least 50 minutes | 142 | 52 | $135 | |
99239 |
Hospital discharge day management, more than 30 minutes | 46 | 46 | $131 | |
99223 |
Initial hospital care with moderate level of medical decision making, if using time, at least 75 minutes | 29 | 29 | $196 |
In context: peer comparison
Among 95 peers in Stanford Internal Medicine Physician, average services per provider: 85. This provider delivers 2.6× the peer median.Medicare Part D · 2023
Top prescriptions
Total claims
12
Patients
0
Total drug cost
$486
| Drug | Type | Claims | Patients | Total cost |
|---|---|---|---|---|
| Gabapentin | Generic | 12 | 0 | $486 |
Hospital affiliations
Frequently asked questions
What is Dr. Ryan Chiang's medical specialty?
Dr. Ryan Chiang practices Internal Medicine Physician in Stanford, CA.
Where does Dr. Ryan Chiang practice?
Dr. Ryan Chiang practices at 300 Pasteur Dr, Stanford, CA 943052200. Office phone: 6507234000.
What is Dr. Ryan Chiang's NPI?
Dr. Ryan Chiang's National Provider Identifier (NPI) is 1891323986, issued by NPPES.
Does Dr. Ryan Chiang accept Medicare assignment?
Yes. Dr. Ryan Chiang accepts Medicare assignment, meaning Medicare-allowed amounts are accepted as full payment for covered services.
What procedures does Dr. Ryan Chiang commonly perform?
Top Medicare-reported procedures in 2023: Subsequent hospital care with moderate levelof medical decision making (HCPCS 99233); Hospital discharge day management (HCPCS 99239); Initial hospital care with moderate level of medical decision making (HCPCS 99223). Source: CMS Medicare Physician & Other Practitioners file.