Doctor profile · Federal record
Dr. Gabriel Mannis, MD
Medical Oncology Physician (CMS: Hematology/Oncology) · Internal Medicine Physician · Hematology (Internal Medicine) Physician · Hematology & Oncology Physician · Stanford, CA
- NPI 1881929347
- Accepts Medicare
- MIPS 75.5 / 100 · 2023
- 18 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
-
UCSF, 505 Parnassus Avenue, M-987
San Francisco, CA 941430001
(415) 353-1000
Credentials & registration
- NPI registered
- October 2009 — 17 yrs on file
- Profile last updated
- April 12, 2024
- Year of graduation
- 2008 — 18 yrs since
- Specialty taxonomy
- 207RX0202X — NUCC code
- State license (1)
- California #A110736
Federal sanctions & exclusions
No sanctions, exclusions or revocations on file
Checked against OIG LEIE on NPI 1881929347. Last verified May 11, 2026.Medicare procedures · 2023
Top services delivered
Total services
807
Distinct HCPCS
6
Medicare allowed
$116,589
| HCPCS | Description | Services | Patients | Avg allowed | |
|---|---|---|---|---|---|
99233 |
Subsequent hospital care with moderate levelof medical decision making, if using time, at least 50 minutes | 292 | 57 | $137 | |
99215 |
Established patient office or other outpatient visit, 40-54 minutes | 231 | 62 | $166 | |
99214 |
Established patient office or other outpatient visit, 30-39 minutes | 186 | 69 | $113 | |
99239 |
Hospital discharge day management, more than 30 minutes | 38 | 30 | $132 | |
99223 |
Initial hospital care with moderate level of medical decision making, if using time, at least 75 minutes | 37 | 33 | $200 | |
99205 |
New patient office or other outpatient visit, 60-74 minutes | 23 | 23 | $209 |
In context: peer comparison
Among 27 peers in Stanford Medical Oncology Physician, average services per provider: 634. This provider delivers 1.3× the peer median.Open Payments
Industry payments received
All-time total
$28,969
Transactions
36
Manufacturers
6
| Payer (manufacturer) | Industry | Txns | Amount |
|---|---|---|---|
| Daiichi Sankyo INC. | 10 | $8,799.73 | |
| Stemline Therapeutics INC. | 7 | $8,529.69 | |
| Abbvie INC. | 12 | $6,897.53 | |
| Servier Pharmaceuticals LLC | 5 | $3,724.29 | |
| Aadi Bioscience, INC. | 1 | $750.00 | |
| Taiho Oncology, INC. | 1 | $267.31 |
By nature of payment
Medicare Part D · 2023
Top prescriptions
Total claims
73
Patients
15
Total drug cost
$265,686
| Drug | Type | Claims | Patients | Total cost |
|---|---|---|---|---|
| Venclexta (Venetoclax) | Brand | 54 | 15 | $265,103 |
| Levofloxacin | Generic | 19 | 0 | $583 |
Hospital affiliations
Frequently asked questions
What is Dr. Gabriel Mannis's medical specialty?
Dr. Gabriel Mannis practices Medical Oncology Physician in Stanford, CA.
Where does Dr. Gabriel Mannis practice?
Dr. Gabriel Mannis practices at 300 Pasteur Dr, Stanford, CA 943052200. Office phone: 6507234000.
What is Dr. Gabriel Mannis's NPI?
Dr. Gabriel Mannis's National Provider Identifier (NPI) is 1881929347, issued by NPPES.
Does Dr. Gabriel Mannis accept Medicare assignment?
Yes. Dr. Gabriel Mannis accepts Medicare assignment, meaning Medicare-allowed amounts are accepted as full payment for covered services.
What procedures does Dr. Gabriel Mannis commonly perform?
Top Medicare-reported procedures in 2023: Subsequent hospital care with moderate levelof medical decision making (HCPCS 99233); Established patient office or other outpatient visit (HCPCS 99215); Established patient office or other outpatient visit (HCPCS 99214). Source: CMS Medicare Physician & Other Practitioners file.