Doctor profile · Federal record
Dr. Gerald Diaz, M.D.
Internal Medicine Physician (CMS: Internal Medicine) · San Jose, CA
- NPI 1669784443
- Accepts Medicare
- MIPS 74.2 / 100 · 2023
- 16 yrs in practice
- Male
- Group practice
- No sanctions
Practice & contact
Operates at 2 locations .
- Primary practice
-
751 S Bascom Ave
San Jose, CA 951282699
(408) 368-6498 - Additional location
-
2799 W. Grand Boulevard, Henry Ford Hospital
Detroit, MI 48202
(800) 436-7936
Credentials & registration
- NPI registered
- July 2010 — 16 yrs on file
- Profile last updated
- March 18, 2021
- Year of graduation
- 2010 — 16 yrs since
- Specialty taxonomy
- 207R00000X — NUCC code
- State license (1)
- California #A126359
Federal sanctions & exclusions
No sanctions, exclusions or revocations on file
Checked against OIG LEIE on NPI 1669784443. Last verified May 11, 2026.Medicare procedures · 2023
Top services delivered
Total services
1,098
Distinct HCPCS
4
Medicare allowed
$103,392
| HCPCS | Description | Services | Patients | Avg allowed | |
|---|---|---|---|---|---|
99232 |
Subsequent hospital care with moderate levelof medical decision making, if using time, at least 35 minutes | 750 | 332 | $91 | |
99231 |
Subsequent hospital care with straightforward or low level of medical decision making, per day, if using time, at least 25 minutes | 157 | 94 | $55 | |
99239 |
Hospital discharge day management, more than 30 minutes | 137 | 136 | $134 | |
99222 |
Initial hospital care with straightforward or low-level medical decision making, if using time, at least 55 minutes | 54 | 54 | $149 |
In context: peer comparison
Among 94 peers in this city , average services per provider: 175. This provider delivers 6.3× the peer median.Medicare Part D · 2023
Top prescriptions
Total claims
64
Patients
37
Total drug cost
$12,425
| Drug | Type | Claims | Patients | Total cost |
|---|---|---|---|---|
| Furosemide | Generic | 16 | 14 | $129 |
| Eliquis (Apixaban) | Brand | 14 | 12 | $11,941 |
| Metoprolol Succinate | Generic | 12 | 11 | $160 |
| Amlodipine Besylate | Generic | 11 | 0 | $47 |
| Pantoprazole Sodium | Generic | 11 | 0 | $148 |
Frequently asked questions
What is Dr. Gerald Diaz's medical specialty?
Dr. Gerald Diaz practices Internal Medicine Physician in San Jose, CA.
Where does Dr. Gerald Diaz practice?
Dr. Gerald Diaz practices at 751 S Bascom Ave, San Jose, CA 951282699. Office phone: 4083686498.
What is Dr. Gerald Diaz's NPI?
Dr. Gerald Diaz's National Provider Identifier (NPI) is 1669784443, issued by NPPES.
Does Dr. Gerald Diaz accept Medicare assignment?
Yes. Dr. Gerald Diaz accepts Medicare assignment, meaning Medicare-allowed amounts are accepted as full payment for covered services.
What procedures does Dr. Gerald Diaz commonly perform?
Top Medicare-reported procedures in 2023: Subsequent hospital care with moderate levelof medical decision making (HCPCS 99232); Subsequent hospital care with straightforward or low level of medical decision making (HCPCS 99231); Hospital discharge day management (HCPCS 99239). Source: CMS Medicare Physician & Other Practitioners file.