Doctor profile · Federal record
Dr. David Duffy, M.D.
Emergency Medicine Physician (CMS: Emergency Medicine) · Greenbrae, CA
- NPI 1861414203
- Accepts Medicare
- MIPS 86.3 / 100 · 2023
- 36 yrs in practice
- Male
- Group practice
- No sanctions
Practice & contact
- Primary practice
-
250 Bon Air RD
Greenbrae, CA 949041702
(415) 925-7000 - Mailing address
-
2100 Powell St
Emeryville, CA 946081826
Credentials & registration
- NPI registered
- July 2006 — 20 yrs on file
- Profile last updated
- July 8, 2007
- Year of graduation
- 1990 — 36 yrs since
- Specialty taxonomy
- 207P00000X — NUCC code
- State license (1)
- California #G71879
Federal sanctions & exclusions
No sanctions, exclusions or revocations on file
Checked against OIG LEIE on NPI 1861414203. Last verified May 11, 2026.Medicare procedures · 2023
Top services delivered
Total services
679
Distinct HCPCS
4
Medicare allowed
$79,681
| HCPCS | Description | Services | Patients | Avg allowed | |
|---|---|---|---|---|---|
99285 |
Emergency department visit with high level of medical decision making | 274 | 266 | $189 | |
93010 |
Routine electrocardiogram (ecg) using at least 12 leads with interpretation and report only | 246 | 227 | $9 | |
99284 |
Emergency department visit with moderate level of medical decision making | 111 | 105 | $130 | |
99291 |
Critical care, first 30-74 minutes | 48 | 47 | $235 |
In context: peer comparison
Among 5 peers in Greenbrae Emergency Medicine Physician, average services per provider: 147. This provider delivers 4.6× the peer median.Medicare Part D · 2023
Top prescriptions
Total claims
14
Patients
13
Total drug cost
$81
| Drug | Type | Claims | Patients | Total cost |
|---|---|---|---|---|
| Hydrocodone-Acetaminophen (Hydrocodone/Acetaminophen) | Brand | 14 | 13 | $81 |
Frequently asked questions
What is Dr. David Duffy's medical specialty?
Dr. David Duffy practices Emergency Medicine Physician in Greenbrae, CA.
Where does Dr. David Duffy practice?
Dr. David Duffy practices at 250 Bon Air RD, Greenbrae, CA 949041702. Office phone: 4159257000.
What is Dr. David Duffy's NPI?
Dr. David Duffy's National Provider Identifier (NPI) is 1861414203, issued by NPPES.
Does Dr. David Duffy accept Medicare assignment?
Yes. Dr. David Duffy accepts Medicare assignment, meaning Medicare-allowed amounts are accepted as full payment for covered services.
What procedures does Dr. David Duffy 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.