Doctor profile · Federal record
Dr. John Leonard, M.D
Emergency Medicine Physician (CMS: Emergency Medicine) · Walnut Creek, CA
- NPI 1578582961
- Accepts Medicare
- MIPS 86.3 / 100 · 2023
- 34 yrs in practice
- Male
- Group practice
- No sanctions
Practice & contact
- Primary practice
-
1601 Ygnacio Valley RD
Walnut Creek, CA 945983122
(925) 939-3000 - Mailing address
-
2100 Powell St, Ste 920
Emeryville, CA 946081826
Credentials & registration
- NPI registered
- July 2006 — 20 yrs on file
- Profile last updated
- November 8, 2007
- Year of graduation
- 1992 — 34 yrs since
- Specialty taxonomy
- 207P00000X — NUCC code
- State license (1)
- California #G77839
- Medicaid
- CA #00G778390
Federal sanctions & exclusions
No sanctions, exclusions or revocations on file
Checked against OIG LEIE on NPI 1578582961. Last verified May 11, 2026.Medicare procedures · 2023
Top services delivered
Total services
668
Distinct HCPCS
4
Medicare allowed
$99,048
| HCPCS | Description | Services | Patients | Avg allowed | |
|---|---|---|---|---|---|
99285 |
Emergency department visit with high level of medical decision making | 354 | 340 | $186 | |
93010 |
Routine electrocardiogram (ecg) using at least 12 leads with interpretation and report only | 127 | 125 | $9 | |
99284 |
Emergency department visit with moderate level of medical decision making | 110 | 108 | $129 | |
99291 |
Critical care, first 30-74 minutes | 77 | 74 | $232 |
In context: peer comparison
Among 26 peers in Walnut Creek Emergency Medicine Physician, average services per provider: 87. This provider delivers 7.7× the peer median.Medicare Part D · 2023
Top prescriptions
Total claims
76
Patients
75
Total drug cost
$410
| Drug | Type | Claims | Patients | Total cost |
|---|---|---|---|---|
| Hydrocodone-Acetaminophen (Hydrocodone/Acetaminophen) | Brand | 27 | 26 | $101 |
| Ondansetron Odt (Ondansetron) | Brand | 13 | 13 | $61 |
| Prednisone | Generic | 13 | 13 | $31 |
| Cephalexin | Generic | 12 | 12 | $135 |
| Sulfamethoxazole-Trimethoprim (Sulfamethoxazole/Trimethoprim) | Brand | 11 | 11 | $81 |
Hospital affiliations
Frequently asked questions
What is Dr. John Leonard's medical specialty?
Dr. John Leonard practices Emergency Medicine Physician in Walnut Creek, CA.
Where does Dr. John Leonard practice?
Dr. John Leonard practices at 1601 Ygnacio Valley RD, Walnut Creek, CA 945983122. Office phone: 9259393000.
What is Dr. John Leonard's NPI?
Dr. John Leonard's National Provider Identifier (NPI) is 1578582961, issued by NPPES.
Does Dr. John Leonard accept Medicare assignment?
Yes. Dr. John Leonard accepts Medicare assignment, meaning Medicare-allowed amounts are accepted as full payment for covered services.
What procedures does Dr. John Leonard commonly perform?
Top Medicare-reported procedures in 2023: Emergency department visit with high level of medical decision making (HCPCS 99285); Routine electrocardiogram (ecg) using at least 12 leads with interpretation and report only (HCPCS 93010); Emergency department visit with moderate level of medical decision making (HCPCS 99284). Source: CMS Medicare Physician & Other Practitioners file.