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Edit this profileWhere to find Mark S. O'Brien, MD
- Carmel location main office
11725 N Illinois St Ste 250, Carmel, IN 46032 - Butler location
409 E Washington St, Butler, IN 46721
About Dr. O'brien
Mark S. O'Brien, MD is a healthcare provider in Carmel, IN specializing in family practice. Mark trained at Indiana University School of Medicine, graduating in 1988. Mark is also listed as specializing in family medicine and preventive medicine — preventive/occupational. Medicare claims data shows Mark provided 644 services to 421 patients. The services billed most often include established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more, established patient office or other outpatient visit with low level od decision making, if using time, 20 minutes or more, and administration of influenza virus vaccine. This provider record is associated with NPI 1124129267.
Factual summary compiled by Guide.md from public records; not written by this provider.
Education & Training
Specialty
Credentials & Licensing
Medicare information
Exactly as CMS reports it (National Downloadable File, Opt-Out Affidavits, Order & Referring). Not an insurance directory; confirm coverage with the office.
Contact Information
- (317) 688-5300
- Email not available
Practice Locations
11725 N ILLINOIS ST STE 250
Carmel, IN 46032
409 E Washington St
Butler, IN 46721
Conditions Commonly Evaluated or Treated
Within Family Medicine generally. Availability varies by clinician, training and location — this profile has not been claimed, so nothing here is a personal claim by the provider.
Conditions
Most searched conditions
- Allergies
- Diabetes
- Flu
- Hypothyroidism
- Strep throat
- UTI
Cardiometabolic
Digestive
Genitourinary and reproductive
Musculoskeletal and pain
Neurologic and behavioral
Respiratory and infectious
- Acute bronchitis
- Asthma
- Sinus infection
Skin
Common childhood and ear conditions
Pain & Joints
Procedures & services
Most searched procedures
- Annual physical
- Blood test
- Flu shot
- Medicare wellness visit
- Sick visit
- TB test
- Well-woman exam
Preventive interventions
- Birth control counseling
- Smoking cessation counseling
Screening and testing
- Cholesterol screening
- Depression screening
- Diabetes and prediabetes screening
- EKG
Diagnostic Tests
- COVID-19 testing
- Rapid Strep and Flu Swabs
- Urine Drug Screen
Exams & Screenings
- Camp and School Physical
- Pre-Op Clearance Exam
Foot and Leg Pain
- Toenail Fungus Treatment
Heart & Circulation
Injections
Lungs & Breathing
Minor Procedures
- Burn and Wound Care
- Ingrown toenail removal
- Suture removal
Occupational Health
- DOT Physical
Office procedures
- Earwax removal
- Incision and drainage of an abscess
- Superficial foreign-body removal
Pain Management
- Joint injections
Preventive Care
- Chronic Illness Checkup
- Routine Vaccines
- Travel Vaccines And Consult
Respiratory
- Breathing Treatment
Senior Care
Sexual & Reproductive Health
Skin Procedures
- Cyst Removal
- Precancerous Sun Spot Freezing
- Skin Tag Removal
- Wart Removal
Sleep Health
- At-Home Sleep Study Order
Urgent Care Procedures
- Stitches and Laceration Repair
Wellness & Weight
- Weight Management Consult
Women's Health
- Hormone Replacement Therapy Consultation
Procedures Most Often Billed to Medicare
644 services · 421 patients · 8 distinct codes
| Procedure | Type | Code | Services | Compared with peers |
|---|---|---|---|---|
| Influenza vaccine split virus, preservative free | Treatment | 90662 |
33 | As often as other peers in Family Practice |
| Pneumococcal conjugate vaccine, 20 valent (pcv20), for intramuscular use | Treatment | 90677 |
15 | As often as other peers in Family Practice |
| Established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more | Office visit | 99214 |
415 | More often than most peers in Family Practice |
| Established patient office or other outpatient visit with low level od decision making, if using time, 20 minutes or more | Office visit | 99213 |
88 | As often as other peers in Family Practice |
| Administration of influenza virus vaccine | Billing code | G0008 |
36 | As often as other peers in Family Practice |
| Hemoglobin a1c level | Lab test | 83036 |
24 | Less often than most peers in Family Practice |
| Automated urinalysis test | Lab test | 81003 |
18 | Less often than most peers in Family Practice |
| Administration of pneumococcal vaccine | Billing code | G0009 |
15 | As often as other peers in Family Practice |
Source: CMS Medicare public data. Shows how often procedures were billed — not quality of care or patient satisfaction.
Related providers
Connections drawn from the registry and from what providers have told us. A link here is not a referral or an endorsement.
Other family practices at this location 1
Same specialty, same street address — most likely the same department or group.
Also at this address 4
Providers at the same street address. Each files their own registry entry, so a shared practice often appears under several different names.
Other family practices in Carmel 8
Same specialty, same city.
More connections — 23 related providers in 3 groups
Trained at Indiana University School of Medicine 7
Other providers in the same specialty who trained at the same institution.
Class of 1988 at Indiana University School of Medicine 8
Providers who graduated from the same medical school in the same year.
Also performs Influenza vaccine split virus, preservative free 8
Providers in IN who bill this service to Medicare most often.
Common questions
What kind of doctor is Dr. O'Brien?
Dr. O'Brien is a family practice in Carmel, IN. That is the designation recorded for this NPI in the federal registry.
NPI registry
What is Dr. O'Brien's address?
Dr. O'Brien is listed at 11725 N Illinois St Ste 250, Carmel, IN 46032. Addresses come from the NPI registry and can lag a move, so confirm before travelling.
NPI registry
How can I make an appointment with Dr. O'Brien?
The number on file is (317) 688-5300. Contact the office directly to confirm availability and scheduling.
NPI registry
What is the NPI for Dr. O'Brien?
Dr. O'Brien's National Provider Identifier is 1124129267. It is issued by the Centers for Medicare & Medicaid Services and is unique and permanent — it does not change if they move practice.
NPI registry
Where did Dr. O'Brien train?
Dr. O'Brien attended Indiana University School of Medicine, graduating in 1988. This comes from the CMS National Downloadable File.
CMS public data
How much experience does Dr. O'Brien have?
Dr. O'Brien has 38 years experience. Calculated from a graduation year of 1988, reported in the CMS National Downloadable File.
CMS public data
What procedures does Dr. O'Brien perform?
According to Medicare billing data, Dr. O'Brien provides treatments such as influenza vaccine split virus, preservative free and pneumococcal conjugate vaccine, 20 valent , for intramuscular use, alongside routine visits and testing. This reflects Medicare patients only and is billing volume, not a measure of quality.
Medicare claims
Is Dr. O'Brien's profile verified?
Not yet. This profile is built from public federal data and has not been confirmed by Dr. O'Brien. If this is you, claiming it is free.
Guide.md
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