Doctor profile · Federal record
Dr. Michael Duffy, PA
Physician Assistant · Oakland, CA
- NPI 1801839188
- 20 yrs on file
- Male
- Group practice
- No sanctions
Practice & contact
- Primary practice
-
3315 Broadway
Oakland, CA 946115717
(510) 486-2300
fax (510) 486-2333 - Mailing address
-
200 Porter Dr Ste 215
San Ramon, CA 945831524
Credentials & registration
- NPI registered
- June 2006 — 20 yrs on file
- Profile last updated
- July 21, 2022
- Specialty taxonomy
- 363A00000X — NUCC code
- State license (1)
- California #PA11368
- Medicaid
- NY #37623171
Federal sanctions & exclusions
No sanctions, exclusions or revocations on file
Checked against OIG LEIE on NPI 1801839188. Last verified May 11, 2026.Medicare procedures · 2023
Top services delivered
Total services
154
Distinct HCPCS
6
Medicare allowed
$7,929
| HCPCS | Description | Services | Patients | Avg allowed | |
|---|---|---|---|---|---|
83036 |
Hemoglobin a1c level | 55 | 40 | $10 | |
99203 |
New patient office or other outpatient visit, 30-44 minutes | 31 | 31 | $102 | |
99213 |
Established patient office or other outpatient visit, 20-29 minutes | 23 | 20 | $83 | |
85018 |
Blood count, hemoglobin | 19 | 12 | $2 | |
99204 |
New patient office or other outpatient visit, 45-59 minutes | 15 | 15 | $151 | |
81003 |
Automated urinalysis test | 11 | 11 | $2 |
In context: peer comparison
Among 22 peers in Oakland Physician Assistant, average services per provider: 44. This provider delivers 3.5× the peer median.Medicare Part D · 2023
Top prescriptions
Total claims
1,532
Patients
429
Total drug cost
$71,995
| Drug | Type | Claims | Patients | Total cost |
|---|---|---|---|---|
| Atorvastatin Calcium | Generic | 198 | 63 | $2,575 |
| Lisinopril | Generic | 193 | 50 | $2,194 |
| Levothyroxine Sodium | Generic | 169 | 48 | $3,879 |
| Hydrocodone-Acetaminophen (Hydrocodone/Acetaminophen) | Brand | 129 | 31 | $3,311 |
| Omeprazole | Generic | 125 | 36 | $2,140 |
| Gabapentin | Generic | 116 | 28 | $3,414 |
| Metformin Hcl | Generic | 110 | 31 | $1,350 |
| Simvastatin | Generic | 85 | 27 | $1,090 |
| Losartan Potassium | Generic | 74 | 26 | $1,439 |
| Amlodipine Besylate | Generic | 71 | 22 | $1,047 |
Frequently asked questions
What is Dr. Michael Duffy's medical specialty?
Dr. Michael Duffy practices Physician Assistant in Oakland, CA.
Where does Dr. Michael Duffy practice?
Dr. Michael Duffy practices at 3315 Broadway, Oakland, CA 946115717. Office phone: 5104862300.
What is Dr. Michael Duffy's NPI?
Dr. Michael Duffy's National Provider Identifier (NPI) is 1801839188, issued by NPPES.
What procedures does Dr. Michael Duffy commonly perform?
Top Medicare-reported procedures in 2023: Hemoglobin a1c level (HCPCS 83036); New patient office or other outpatient visit (HCPCS 99203); Established patient office or other outpatient visit (HCPCS 99213). Source: CMS Medicare Physician & Other Practitioners file.