Doctor profile · Federal record
Dr. Guillermo Saenz Zavala, MD
Family Medicine Physician (CMS: Family Practice) · Student in an Organized Health Care Education/Training Program · Fontana, CA
- NPI 1720475478
- Accepts Medicare
- 14 yrs in practice
- Male
- Group practice
- No sanctions
Practice & contact
- Primary practice
-
17234 Valley Blvd
Fontana, CA 92335
(909) 427-5084
fax (909) 427-5022
Credentials & registration
- NPI registered
- April 2015 — 11 yrs on file
- Profile last updated
- August 2, 2018
- Year of graduation
- 2012 — 14 yrs since
- Specialty taxonomy
- 207Q00000X — NUCC code
- State license (1)
- California #A153513
Federal sanctions & exclusions
No sanctions, exclusions or revocations on file
Checked against OIG LEIE on NPI 1720475478. Last verified May 11, 2026.Medicare procedures · 2023
Top services delivered
Total services
227
Distinct HCPCS
7
Medicare allowed
$29,050
| HCPCS | Description | Services | Patients | Avg allowed | |
|---|---|---|---|---|---|
99214 |
Established patient office or other outpatient visit, 30-39 minutes | 115 | 85 | $129 | |
G0438 |
Annual wellness visit; includes a personalized prevention plan of service (pps), initial visit | 24 | 24 | $165 | |
99204 |
New patient office or other outpatient visit, 45-59 minutes | 21 | 21 | $170 | |
99213 |
Established patient office or other outpatient visit, 20-29 minutes | 21 | 20 | $92 | |
99211 |
Office or other outpatient visit for the evaluation and management of established patient that may not require presence of healthcare professional | 18 | 12 | $24 | |
G0439 |
Annual wellness visit, includes a personalized prevention plan of service (pps), subsequent visit | 15 | 15 | $129 | |
99215 |
Established patient office or other outpatient visit, 40-54 minutes | 13 | 11 | $181 |
In context: peer comparison
Among 13 peers in Fontana Family Medicine Physician, average services per provider: 62. This provider delivers 3.7× the peer median.Open Payments
Industry payments received
All-time total
$100
Transactions
6
Manufacturers
4
| Payer (manufacturer) | Industry | Txns | Amount |
|---|---|---|---|
| Amgen INC. | 2 | $31.69 | |
| GlaxoSmithKline, LLC. | 2 | $31.42 | |
| Novo Nordisk INC | 1 | $22.06 | |
| Exact Sciences Corporation | 1 | $15.12 |
By nature of payment
Medicare Part D · 2023
Top prescriptions
Total claims
2,977
Patients
1,137
Total drug cost
$56,837
| Drug | Type | Claims | Patients | Total cost |
|---|---|---|---|---|
| Atorvastatin Calcium | Generic | 687 | 259 | $17,151 |
| Metformin Hcl | Generic | 320 | 123 | $4,918 |
| Losartan Potassium | Generic | 295 | 108 | $5,414 |
| Amlodipine Besylate | Generic | 248 | 96 | $3,079 |
| Lisinopril | Generic | 235 | 80 | $3,075 |
| Levothyroxine Sodium | Generic | 197 | 64 | $3,645 |
| Hydrochlorothiazide | Generic | 190 | 62 | $1,167 |
| Omeprazole | Generic | 139 | 58 | $2,923 |
| Tamsulosin Hcl | Generic | 115 | 48 | $2,715 |
| Gabapentin | Generic | 105 | 42 | $1,945 |
Frequently asked questions
What is Dr. Guillermo Saenz Zavala's medical specialty?
Dr. Guillermo Saenz Zavala practices Family Medicine Physician in Fontana, CA.
Where does Dr. Guillermo Saenz Zavala practice?
Dr. Guillermo Saenz Zavala practices at 17234 Valley Blvd, Fontana, CA 92335. Office phone: 9094275084.
What is Dr. Guillermo Saenz Zavala's NPI?
Dr. Guillermo Saenz Zavala's National Provider Identifier (NPI) is 1720475478, issued by NPPES.
Does Dr. Guillermo Saenz Zavala accept Medicare assignment?
Yes. Dr. Guillermo Saenz Zavala accepts Medicare assignment, meaning Medicare-allowed amounts are accepted as full payment for covered services.
What procedures does Dr. Guillermo Saenz Zavala commonly perform?
Top Medicare-reported procedures in 2023: Established patient office or other outpatient visit (HCPCS 99214); Annual wellness visit; includes a personalized prevention plan of service (pps), initial visit (HCPCS G0438); New patient office or other outpatient visit (HCPCS 99204). Source: CMS Medicare Physician & Other Practitioners file.