Internal Medicine, Medical Oncology · Stanford, CA
NPI
1881929347
Since 2009
Specialty
Internal Medicine, Medical Oncology
Code 207RX0202X
Group practices
2
Medicare group memberships
Hospitals
3
Hospital affiliations
300 Pasteur Dr
Stanford, CA, 94305
Phone (650) 723-4000
Groups this clinician bills Medicare through
Medicare paid, 2024
$84K
696 services
Medicare patients, 2024
132
Average age 76
Drug cost, 2024
$2.0M
287 prescriptions
Company payments, 2025
$29K
From 13 companies
Procedures and visits billed to Original Medicare, 2024
In 2024, the most common Medicare service billed by Gabriel N Mannis was code 99233 (hospital e&m - subsequent), 163 times for 44 patients. In total Gabriel N Mannis billed 696 services in 6 codes, and Medicare paid $84K.
| Code |
|---|
Official US government data: the national provider registry and Medicare enrollment records, linked by NPI. Last update of this record: 2024-04-12.
| Setting |
|---|
| Services |
|---|
| Patients |
|---|
| Paid per service |
|---|
| Medicare paid |
|---|
| 99233 Hospital E&M - Subsequent | Facility | 163 | 44 | $105.69 | $17K |
| 99215 Office E&M - Established | Facility | 158 | 35 | $127.85 | $20K |
| 99214 Office E&M - Established | Office | 155 | 56 | $116.21 | $18K |
| 99215 Office E&M - Established | Office | 77 | 35 | $155.90 | $12K |
| 99214 Office E&M - Established | Facility | 61 | 26 | $82.10 | $5,008 |
| 99223 Hospital E&M - Initial | Facility | 30 | 28 | $143.16 | $4,295 |
| 99239 Hospital Discharge Management | Facility | 22 | 22 | $96.57 | $2,125 |
| 99205 Office E&M - New | Facility | 16 | 16 | $152.74 | $2,444 |
| 99205 Office E&M - New | Office | 14 | 14 | $196.84 | $2,756 |
By year: 2022 $87K for 815 services; 2023 $91K for 839 services; 2024 $84K for 696 services.
Medicare prescription drug claims, 2024
In 2024, the drug Gabriel N Mannis prescribed most often to Medicare patients was Venclexta (Venetoclax), with 57 prescriptions and refills. In total Gabriel N Mannis wrote 287 Medicare prescriptions that cost $2.0M.
Brand drugs: 144 claims; generic drugs: 143 claims.
Money and other things of value reported by the companies
In 2025, drug and medical device companies paid Gabriel N Mannis $29K ($29K in general payments such as food, travel and fees) from 13 companies. The largest payer was Abbvie Inc. with $9,290.
| Company | Payments | Amount |
|---|---|---|
| Abbvie Inc. ABBV | 10 | $9,290 |
| Taiho Oncology, Inc. 4578.T | 1 | $3,900 |
| Astellas Pharma Global Development 4503.T | 2 | $3,718 |
| Daiichi Sankyo Inc. 4568.T | 4 | $3,393 |
| Janssen Scientific Affairs, LLC JNJ | 3 | $2,659 |
| Stemline Therapeutics Inc. | 1 | $2,340 |
| Genentech USA, Inc. ROG.SW | 2 | $1,847 |
| Syndax Pharmaceuticals, Inc. SNDX | 1 | $800 |
| Rigel Pharmaceuticals, Inc. RIGL | 1 | $685 |
| Astellas Pharma US Inc 4503.T | 1 | $676 |
Official US government data on Original Medicare services, Medicare prescription drug plans and the payments drug and device companies must report. Services with fewer than 11 patients and drugs with fewer than 11 claims are not published. Procedure codes are shown by number with their public category.