Doctor profile · Federal record
Dr. John O'Brien, M.D.
Family Medicine Physician · O Fallon, MO
- NPI 1083689061
- 20 yrs on file
- Male
- Group practice
- No sanctions
Practice & contact
Operates at 2 locations .
- Primary practice
-
2630 Highway K
O Fallon, MO 633686624
(636) 240-5454
fax (618) 980-5335 - Additional location
-
9426 Phoenix Village Pkwy
O Fallon, MO 633684781
(636) 561-5999
fax (636) 561-4746
Credentials & registration
- NPI registered
- February 2006 — 20 yrs on file
- Profile last updated
- February 24, 2021
- Specialty taxonomy
- 207Q00000X — NUCC code
- State license (1)
- Missouri #R3E76
Federal sanctions & exclusions
No sanctions, exclusions or revocations on file
Checked against OIG LEIE on NPI 1083689061. Last verified May 11, 2026.Medicare procedures · 2023
Top services delivered
Total services
358
Distinct HCPCS
5
Medicare allowed
$26,928
| HCPCS | Description | Services | Patients | Avg allowed | |
|---|---|---|---|---|---|
36415 |
Insertion of needle into vein for collection of blood sample | 145 | 118 | $8 | |
99214 |
Established patient office or other outpatient visit, 30-39 minutes | 100 | 85 | $125 | |
G0439 |
Annual wellness visit, includes a personalized prevention plan of service (pps), subsequent visit | 63 | 63 | $125 | |
99213 |
Established patient office or other outpatient visit, 20-29 minutes | 37 | 33 | $88 | |
99215 |
Established patient office or other outpatient visit, 40-54 minutes | 13 | 11 | $162 |
In context: peer comparison
Among 7 peers in this city , average services per provider: 66. This provider delivers 5.4× the peer median.Medicare Part D · 2023
Top prescriptions
Total claims
2,164
Patients
771
Total drug cost
$21,924
| Drug | Type | Claims | Patients | Total cost |
|---|---|---|---|---|
| Atorvastatin Calcium | Generic | 338 | 119 | $2,798 |
| Levothyroxine Sodium | Generic | 323 | 109 | $4,836 |
| Losartan Potassium | Generic | 226 | 78 | $2,896 |
| Lisinopril | Generic | 159 | 55 | $1,279 |
| Amlodipine Besylate | Generic | 132 | 52 | $690 |
| Omeprazole | Generic | 131 | 48 | $1,478 |
| Simvastatin | Generic | 114 | 42 | $1,184 |
| Trazodone Hcl | Generic | 113 | 32 | $1,232 |
| Hydrochlorothiazide | Generic | 109 | 40 | $433 |
| Glimepiride | Generic | 100 | 33 | $869 |
Frequently asked questions
What is Dr. John O'Brien's medical specialty?
Dr. John O'Brien practices Family Medicine Physician in O Fallon, MO.
Where does Dr. John O'Brien practice?
Dr. John O'Brien practices at 2630 Highway K, O Fallon, MO 633686624. Office phone: 6362405454.
What is Dr. John O'Brien's NPI?
Dr. John O'Brien's National Provider Identifier (NPI) is 1083689061, issued by NPPES.
What procedures does Dr. John O'Brien commonly perform?
Top Medicare-reported procedures in 2023: Insertion of needle into vein for collection of blood sample (HCPCS 36415); Established patient office or other outpatient visit (HCPCS 99214); Annual wellness visit, includes a personalized prevention plan of service (pps), subsequent visit (HCPCS G0439). Source: CMS Medicare Physician & Other Practitioners file.