Doctor profile · Federal record
Dr. Jonathan Lo, MD
Internal Medicine Physician (CMS: Hospitalist) · Fontana, CA
- NPI 1164570941
- Accepts Medicare
- 29 yrs in practice
- Male
- Group practice
- No sanctions
Practice & contact
- Primary practice
-
9961 Sierra Ave
Fontana, CA 923356720
(909) 427-3910
Credentials & registration
- NPI registered
- January 2007 — 19 yrs on file
- Profile last updated
- December 2, 2021
- Year of graduation
- 1997 — 29 yrs since
- Specialty taxonomy
- 207R00000X — NUCC code
- State license (1)
- California #A66923
Federal sanctions & exclusions
No sanctions, exclusions or revocations on file
Checked against OIG LEIE on NPI 1164570941. Last verified May 11, 2026.Medicare procedures · 2023
Top services delivered
Total services
36
Distinct HCPCS
1
Medicare allowed
$2,898
| HCPCS | Description | Services | Patients | Avg allowed | |
|---|---|---|---|---|---|
99232 |
Subsequent hospital care with moderate levelof medical decision making, if using time, at least 35 minutes | 36 | 11 | $81 |
In context: peer comparison
Among 18 peers in this city , average services per provider: 61. This provider delivers 0.6× the peer median.Medicare Part D · 2023
Top prescriptions
Total claims
95
Patients
51
Total drug cost
$11,253
| Drug | Type | Claims | Patients | Total cost |
|---|---|---|---|---|
| Pantoprazole Sodium | Generic | 17 | 0 | $177 |
| Furosemide | Generic | 15 | 11 | $210 |
| Prednisone | Generic | 15 | 15 | $124 |
| Azithromycin | Generic | 14 | 14 | $79 |
| Eliquis (Apixaban) | Brand | 12 | 0 | $10,391 |
| Amlodipine Besylate | Generic | 11 | 0 | $108 |
| Cefuroxime (Cefuroxime Axetil) | Brand | 11 | 11 | $163 |
Frequently asked questions
What is Dr. Jonathan Lo's medical specialty?
Dr. Jonathan Lo practices Internal Medicine Physician in Fontana, CA.
Where does Dr. Jonathan Lo practice?
Dr. Jonathan Lo practices at 9961 Sierra Ave, Fontana, CA 923356720. Office phone: 9094273910.
What is Dr. Jonathan Lo's NPI?
Dr. Jonathan Lo's National Provider Identifier (NPI) is 1164570941, issued by NPPES.
Does Dr. Jonathan Lo accept Medicare assignment?
Yes. Dr. Jonathan Lo accepts Medicare assignment, meaning Medicare-allowed amounts are accepted as full payment for covered services.
What procedures does Dr. Jonathan Lo commonly perform?
Top Medicare-reported procedures in 2023: Subsequent hospital care with moderate levelof medical decision making (HCPCS 99232). Source: CMS Medicare Physician & Other Practitioners file.