Doctor profile · Federal record
Dr. Mark O'Brien, MD
Family Medicine Physician (CMS: Family Practice) · Preventive Medicine/Occupational Environmental Medicine Physician · Carmel, IN
- NPI 1124129267
- Accepts Medicare
- 38 yrs in practice
- Male
- Group practice
- No sanctions
Practice & contact
Operates at 2 locations .
- Primary practice
-
11725 N Illinois St Ste 250
Carmel, IN 460323015
(317) 688-5300
fax (317) 688-5313 - Additional location
-
409 E Washington St
Butler, IN 467211175
(260) 868-5843
fax (260) 868-5844 - Mailing address
-
250 N Shadeland Ave
Indianapolis, IN 462194959
Credentials & registration
- NPI registered
- September 2006 — 20 yrs on file
- Profile last updated
- January 6, 2021
- Year of graduation
- 1988 — 38 yrs since
- Specialty taxonomy
- 207Q00000X — NUCC code
- State license (1)
- Indiana #01037757A
- Medicaid
- IN #200033390
Federal sanctions & exclusions
No sanctions, exclusions or revocations on file
Checked against OIG LEIE on NPI 1124129267. Last verified May 11, 2026.Medicare procedures · 2023
Top services delivered
Total services
745
Distinct HCPCS
9
Medicare allowed
$77,829
| HCPCS | Description | Services | Patients | Avg allowed | |
|---|---|---|---|---|---|
99214 |
Established patient office or other outpatient visit, 30-39 minutes | 458 | 238 | $118 | |
99213 |
Established patient office or other outpatient visit, 20-29 minutes | 86 | 77 | $83 | |
G0008 |
Administration of influenza virus vaccine | 51 | 51 | $29 | |
90662 |
Influenza vaccine split virus, preservative free | 50 | 50 | $70 | |
90677 |
Pneumococcal conjugate vaccine, 20 valent (pcv20), for intramuscular use | 29 | 29 | $271 | |
G0009 |
Administration of pneumococcal vaccine | 27 | 27 | $29 | |
81003 |
Automated urinalysis test | 19 | 16 | $2 | |
83036 |
Hemoglobin a1c level | 14 | 14 | $10 | |
99496 |
Transitional care management services for problem of high complexity | 11 | 11 | $257 |
In context: peer comparison
Among 18 peers in this city , average services per provider: 66. This provider delivers 11× the peer median.Medicare Part D · 2023
Top prescriptions
Total claims
2,938
Patients
864
Total drug cost
$41,276
| Drug | Type | Claims | Patients | Total cost |
|---|---|---|---|---|
| Atorvastatin Calcium | Generic | 626 | 174 | $8,410 |
| Amlodipine Besylate | Generic | 311 | 98 | $1,780 |
| Losartan Potassium | Generic | 285 | 87 | $3,955 |
| Levothyroxine Sodium | Generic | 239 | 63 | $3,881 |
| Metoprolol Succinate | Generic | 232 | 63 | $5,551 |
| Lisinopril | Generic | 216 | 66 | $1,462 |
| Hydrochlorothiazide | Generic | 176 | 49 | $705 |
| Metformin Hcl Er (Metformin Hcl) | Brand | 166 | 52 | $1,281 |
| Omeprazole | Generic | 151 | 42 | $1,549 |
| Tamsulosin Hcl | Generic | 127 | 41 | $3,130 |
Frequently asked questions
What is Dr. Mark O'Brien's medical specialty?
Dr. Mark O'Brien practices Family Medicine Physician in Carmel, IN.
Where does Dr. Mark O'Brien practice?
Dr. Mark O'Brien practices at 11725 N Illinois St Ste 250, Carmel, IN 460323015. Office phone: 3176885300.
What is Dr. Mark O'Brien's NPI?
Dr. Mark O'Brien's National Provider Identifier (NPI) is 1124129267, issued by NPPES.
Does Dr. Mark O'Brien accept Medicare assignment?
Yes. Dr. Mark O'Brien accepts Medicare assignment, meaning Medicare-allowed amounts are accepted as full payment for covered services.
What procedures does Dr. Mark O'Brien commonly perform?
Top Medicare-reported procedures in 2023: Established patient office or other outpatient visit (HCPCS 99214); Established patient office or other outpatient visit (HCPCS 99213); Administration of influenza virus vaccine (HCPCS G0008). Source: CMS Medicare Physician & Other Practitioners file.