Doctor profile · Federal record
Dr. Alex Diaz, D.O.
Pulmonary Disease Physician (CMS: Internal Medicine) · Student in an Organized Health Care Education/Training Program · San Ramon, CA
- NPI 1659759363
- Accepts Medicare
- 11 yrs in practice
- Male
- Solo practice
- No sanctions
Practice & contact
- Primary practice
-
5401 Norris Canyon RD Ste 306
San Ramon, CA 945835408
(925) 866-8822 - Mailing address
-
5401 Norris Canyon RD Ste 308
San Ramon, CA 945835408
Credentials & registration
- NPI registered
- May 2015 — 11 yrs on file
- Profile last updated
- September 8, 2021
- Year of graduation
- 2015 — 11 yrs since
- Specialty taxonomy
- 207RP1001X — NUCC code
- State license (1)
- California #20A18649
- Medicaid
- CO #1659759363
Federal sanctions & exclusions
No sanctions, exclusions or revocations on file
Checked against OIG LEIE on NPI 1659759363. Last verified May 11, 2026.Medicare procedures · 2023
Top services delivered
Total services
1,539
Distinct HCPCS
10
Medicare allowed
$202,531
| HCPCS | Description | Services | Patients | Avg allowed | |
|---|---|---|---|---|---|
99233 |
Subsequent hospital care with moderate levelof medical decision making, if using time, at least 50 minutes | 260 | 111 | $132 | |
99309 |
Subsequent nursing facility care with moderate level of medical decision making, per day, if using time, at least 30 minutes | 213 | 30 | $122 | |
99232 |
Subsequent hospital care with moderate levelof medical decision making, if using time, at least 35 minutes | 179 | 91 | $88 | |
99214 |
Established patient office or other outpatient visit, 30-39 minutes | 158 | 90 | $146 | |
99291 |
Critical care, first 30-74 minutes | 141 | 66 | $232 | |
99223 |
Initial hospital care with moderate level of medical decision making, if using time, at least 75 minutes | 124 | 116 | $193 | |
99239 |
Hospital discharge day management, more than 30 minutes | 118 | 114 | $129 | |
99204 |
New patient office or other outpatient visit, 45-59 minutes | 93 | 93 | $194 | |
99213 |
Established patient office or other outpatient visit, 20-29 minutes | 57 | 42 | $107 | |
94060 |
Test to measure expiratory airflow and volume changes before and after medication administration | 43 | 42 | $11 |
In context: peer comparison
Among 1 peers in San Ramon Pulmonary Disease Physician, average services per provider: 102. This provider delivers 15× the peer median.Open Payments
Industry payments received
All-time total
$1,486
Transactions
60
Manufacturers
15
| Payer (manufacturer) | Industry | Txns | Amount |
|---|---|---|---|
| GlaxoSmithKline, LLC. | 17 | $337.51 | |
| AstraZeneca Pharmaceuticals Lp | 8 | $243.73 | |
| Amgen INC. | 7 | $139.17 | |
| Genzyme Corporation | 4 | $122.49 | |
| Boehringer Ingelheim Pharmaceuticals, INC. | 5 | $110.70 | |
| Pulmonx Corporation | 5 | $88.04 | |
| Regeneron Healthcare Solutions, INC. | 3 | $78.29 | |
| Insmed, INC. | 3 | $65.70 | |
| Sanofi-Aventis U.S. LLC | 1 | $59.99 | |
| Mylan Specialty L.P. | 2 | $50.32 | |
| Exact Sciences Corporation | 1 | $30.84 | |
| Abiomed | 1 | $29.30 | |
| Lundbeck LLC | 1 | $25.87 | |
| Takeda Pharmaceuticals U.S.A., INC. | 1 | $24.96 | |
| La Jolla Pharmaceutical Company | 1 | $22.96 |
By nature of payment
Medicare Part D · 2023
Top prescriptions
Total claims
431
Patients
102
Total drug cost
$326,203
| Drug | Type | Claims | Patients | Total cost |
|---|---|---|---|---|
| Trelegy Ellipta (Fluticasone/Umeclidin/Vilanter) | Brand | 80 | 22 | $62,831 |
| Albuterol Sulfate Hfa (Albuterol Sulfate) | Brand | 60 | 25 | $1,854 |
| Montelukast Sodium | Generic | 60 | 13 | $1,217 |
| Breo Ellipta (Fluticasone/Vilanterol) | Brand | 40 | 0 | $17,189 |
| Furosemide | Generic | 28 | 0 | $196 |
| Prednisone | Generic | 24 | 17 | $51 |
| Azithromycin | Generic | 19 | 13 | $203 |
| Ventolin Hfa (Albuterol Sulfate) | Brand | 18 | 0 | $1,381 |
| Advair Diskus (Fluticasone Propion/Salmeterol) | Brand | 16 | 0 | $6,700 |
| Ofev (Nintedanib Esylate) | Brand | 16 | 0 | $225,828 |
Frequently asked questions
What is Dr. Alex Diaz's medical specialty?
Dr. Alex Diaz practices Pulmonary Disease Physician in San Ramon, CA.
Where does Dr. Alex Diaz practice?
Dr. Alex Diaz practices at 5401 Norris Canyon RD Ste 306, San Ramon, CA 945835408. Office phone: 9258668822.
What is Dr. Alex Diaz's NPI?
Dr. Alex Diaz's National Provider Identifier (NPI) is 1659759363, issued by NPPES.
Does Dr. Alex Diaz accept Medicare assignment?
Yes. Dr. Alex Diaz accepts Medicare assignment, meaning Medicare-allowed amounts are accepted as full payment for covered services.
What procedures does Dr. Alex Diaz commonly perform?
Top Medicare-reported procedures in 2023: Subsequent hospital care with moderate levelof medical decision making (HCPCS 99233); Subsequent nursing facility care with moderate level of medical decision making (HCPCS 99309); Subsequent hospital care with moderate levelof medical decision making (HCPCS 99232). Source: CMS Medicare Physician & Other Practitioners file.