Doctor profile · Federal record
Dr. Weiyun Ai, MD
Medical Oncology Physician (CMS: Medical Oncology) · San Francisco, CA
- NPI 1649346842
- Accepts Medicare
- MIPS 70.8 / 100 · 2023
- 26 yrs in practice
- Female
- Group practice
- No sanctions
Practice & contact
- Primary practice
-
400 Parnassus Ave
San Francisco, CA 941432202
(415) 353-2737 - Mailing address
-
1635 Divisasdero St, Suite 625, Box 1821
San Francisco, CA 941430001
Credentials & registration
- NPI registered
- November 2006 — 20 yrs on file
- Profile last updated
- June 6, 2008
- Year of graduation
- 2000 — 26 yrs since
- Specialty taxonomy
- 207RX0202X — NUCC code
- State license (1)
- California #A78202
Federal sanctions & exclusions
No sanctions, exclusions or revocations on file
Checked against OIG LEIE on NPI 1649346842. Last verified May 11, 2026.Medicare procedures · 2023
Top services delivered
Total services
552
Distinct HCPCS
5
Medicare allowed
$76,212
| HCPCS | Description | Services | Patients | Avg allowed | |
|---|---|---|---|---|---|
99215 |
Established patient office or other outpatient visit, 40-54 minutes | 313 | 89 | $162 | |
99214 |
Established patient office or other outpatient visit, 30-39 minutes | 135 | 89 | $110 | |
99205 |
New patient office or other outpatient visit, 60-74 minutes | 41 | 41 | $203 | |
36415 |
Insertion of needle into vein for collection of blood sample | 32 | 15 | $8 | |
99213 |
Established patient office or other outpatient visit, 20-29 minutes | 31 | 23 | $69 |
In context: peer comparison
Among 13 peers in this city , average services per provider: 70. This provider delivers 7.9× the peer median.Open Payments
Industry payments received
All-time total
$7,858
Transactions
10
Manufacturers
4
| Payer (manufacturer) | Industry | Txns | Amount |
|---|---|---|---|
| Acrotech Biopharma Inc. | 6 | $4,654.41 | |
| Gilead Sciences, Inc. | 1 | $3,050.00 | |
| ADC Therapeutics America, Inc. | 1 | $108.59 | |
| ABBVIE INC. | 2 | $45.26 |
By nature of payment
Medicare Part D · 2023
Top prescriptions
Total claims
452
Patients
97
Total drug cost
$961,816
| Drug | Type | Claims | Patients | Total cost |
|---|---|---|---|---|
| Acyclovir | Generic | 96 | 35 | $2,164 |
| Brukinsa (Zanubrutinib) | Brand | 49 | 0 | $669,415 |
| Valacyclovir (Valacyclovir Hcl) | Brand | 41 | 17 | $2,064 |
| Ondansetron Hcl | Generic | 40 | 22 | $434 |
| Entecavir | Generic | 33 | 0 | $15,024 |
| Prednisone | Generic | 29 | 0 | $116 |
| Sulfamethoxazole-Trimethoprim (Sulfamethoxazole/Trimethoprim) | Brand | 28 | 0 | $117 |
| Atorvastatin Calcium | Generic | 20 | 0 | $329 |
| Gabapentin | Generic | 19 | 12 | $320 |
| Lorazepam | Generic | 19 | 0 | $70 |
Hospital affiliations
Frequently asked questions
What is Dr. Weiyun Ai's medical specialty?
Dr. Weiyun Ai practices Medical Oncology Physician in San Francisco, CA.
Where does Dr. Weiyun Ai practice?
Dr. Weiyun Ai practices at 400 Parnassus Ave, San Francisco, CA 941432202. Office phone: 4153532737.
What is Dr. Weiyun Ai's NPI?
Dr. Weiyun Ai's National Provider Identifier (NPI) is 1649346842, issued by NPPES.
Does Dr. Weiyun Ai accept Medicare assignment?
Yes. Dr. Weiyun Ai accepts Medicare assignment, meaning Medicare-allowed amounts are accepted as full payment for covered services.
What procedures does Dr. Weiyun Ai commonly perform?
Top Medicare-reported procedures in 2023: Established patient office or other outpatient visit (HCPCS 99215); Established patient office or other outpatient visit (HCPCS 99214); New patient office or other outpatient visit (HCPCS 99205). Source: CMS Medicare Physician & Other Practitioners file.