Doctor profile · Federal record
Dr. Brian O'Leary, MD
Internal Medicine Physician (CMS: Internal Medicine) · Naperville, IL
- NPI 1295702439
- Accepts Medicare
- 41 yrs in practice
- Male
- Group practice
- No sanctions
Practice & contact
- Primary practice
-
1964 Springbrook Square Dr, Ste 104
Naperville, IL 605645949
(630) 946-2565 - Mailing address
-
1860 Paysphere Cir
Chicago, IL 606740018
Credentials & registration
- NPI registered
- March 2006 — 20 yrs on file
- Profile last updated
- September 24, 2021
- Year of graduation
- 1985 — 41 yrs since
- Specialty taxonomy
- 207R00000X — NUCC code
- State license (1)
- Illinois #036073069
- Medicaid
- IL #036073069
Federal sanctions & exclusions
No sanctions, exclusions or revocations on file
Checked against OIG LEIE on NPI 1295702439. Last verified May 11, 2026.Medicare procedures · 2023
Top services delivered
Total services
919
Distinct HCPCS
10
Medicare allowed
$42,833
| HCPCS | Description | Services | Patients | Avg allowed | |
|---|---|---|---|---|---|
99214 |
Established patient office or other outpatient visit, 30-39 minutes | 195 | 77 | $129 | |
36415 |
Insertion of needle into vein for collection of blood sample | 159 | 70 | $8 | |
80053 |
Blood test, comprehensive group of blood chemicals | 134 | 69 | $10 | |
83036 |
Hemoglobin a1c level | 66 | 36 | $10 | |
85025 |
Complete blood cell count (red cells, white blood cell, platelets), automated test and automated differential white blood cell count | 61 | 38 | $7 | |
80061 |
Blood test, lipids (cholesterol and triglycerides) | 56 | 51 | $13 | |
G0439 |
Annual wellness visit, includes a personalized prevention plan of service (pps), subsequent visit | 53 | 53 | $133 | |
99213 |
Established patient office or other outpatient visit, 20-29 minutes | 27 | 23 | $90 | |
84443 |
Blood test, thyroid stimulating hormone (tsh) | 26 | 16 | $16 | |
82043 |
Urine microalbumin (protein) level | 21 | 19 | $6 |
In context: peer comparison
Among 37 peers in Naperville Internal Medicine Physician, average services per provider: 101. This provider delivers 9.1× the peer median.Open Payments
Industry payments received
All-time total
$405
Transactions
22
Manufacturers
9
| Payer (manufacturer) | Industry | Txns | Amount |
|---|---|---|---|
| Lilly USA, LLC | 4 | $80.43 | |
| AstraZeneca Pharmaceuticals Lp | 4 | $77.81 | |
| Sumitomo Pharma America, INC. | 3 | $53.12 | |
| Novo Nordisk INC | 3 | $52.86 | |
| E.R. Squibb & Sons, L.L.C. | 2 | $40.10 | |
| Scpharmaceuticals INC. | 2 | $38.48 | |
| Novartis Pharmaceuticals Corporation | 2 | $30.93 | |
| Merck Sharp & Dohme LLC | 1 | $16.13 | |
| Dexcom, INC. | 1 | $15.53 |
By nature of payment
Medicare Part D · 2023
Top prescriptions
Total claims
4,164
Patients
1,120
Total drug cost
$54,391
| Drug | Type | Claims | Patients | Total cost |
|---|---|---|---|---|
| Atorvastatin Calcium | Generic | 546 | 144 | $5,895 |
| Levothyroxine Sodium | Generic | 422 | 94 | $5,096 |
| Hydrocodone-Acetaminophen (Hydrocodone/Acetaminophen) | Brand | 383 | 73 | $9,183 |
| Amlodipine Besylate | Generic | 298 | 81 | $2,562 |
| Rosuvastatin Calcium | Generic | 296 | 90 | $3,355 |
| Metoprolol Succinate | Generic | 286 | 82 | $4,669 |
| Losartan Potassium | Generic | 276 | 77 | $2,506 |
| Gabapentin | Generic | 266 | 63 | $5,156 |
| Lisinopril | Generic | 263 | 72 | $1,909 |
| Metformin Hcl | Generic | 206 | 57 | $1,513 |
Frequently asked questions
What is Dr. Brian O'Leary's medical specialty?
Dr. Brian O'Leary practices Internal Medicine Physician in Naperville, IL.
Where does Dr. Brian O'Leary practice?
Dr. Brian O'Leary practices at 1964 Springbrook Square Dr, Naperville, IL 605645949. Office phone: 6309462565.
What is Dr. Brian O'Leary's NPI?
Dr. Brian O'Leary's National Provider Identifier (NPI) is 1295702439, issued by NPPES.
Does Dr. Brian O'Leary accept Medicare assignment?
Yes. Dr. Brian O'Leary accepts Medicare assignment, meaning Medicare-allowed amounts are accepted as full payment for covered services.
What procedures does Dr. Brian O'Leary commonly perform?
Top Medicare-reported procedures in 2023: Established patient office or other outpatient visit (HCPCS 99214); Insertion of needle into vein for collection of blood sample (HCPCS 36415); Blood test, comprehensive group of blood chemicals (HCPCS 80053). Source: CMS Medicare Physician & Other Practitioners file.