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DR. MARK S O'BRIEN MD
NPI 1124129267
Family Medicine in Carmel, IN

Active since September 25, 2006PECOS EnrolledAccepts Medicare Assignment
11725 N ILLINOIS ST STE 250, CARMEL, IN 46032(317) 688-5300(317) 688-5313 Get Directions Write a Review

NPPES record last updated: January 6, 2021. Verified against the NPPES registry weekly; last sync: July 26, 2026.

About Dr. Mark S O'brien Md NPPES

Official registry information on file with the National Plan and Provider Enumeration System.

DR. MARK S O'BRIEN MD (NPI 1124129267) is an individual family medicine provider in Carmel, Indiana, licensed in Indiana (01037757A) and active in the NPI registry since September 2006. He is enrolled in Medicare PECOS, is affiliated with Indiana University Health, and maintains a secondary practice location in Butler.

NPPES Registry Identity

NPI1124129267
Entity TypeIndividualMale
Primary Taxonomy207Q00000X
Provider Legal NameDR. MARK S O'BRIENCredential: MD
Location Address11725 N ILLINOIS ST STE 250Carmel, IN 46032-3015
Mailing Address250 N Shadeland AveIndianapolis, IN 46219-4959
Phone(317) 688-5300
Fax(317) 688-5313
Sole ProprietorNo
Medical School CMSIndiana University School Of MedicineGraduated 1988
Enumeration DateSeptember 25, 2006
Last NPPES UpdateJanuary 6, 2021
NPPES CertifiedJanuary 6, 2021
✔ NPI 1124129267 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses 2

★ Primary SpecialtyFamily MedicineAllopathic & Osteopathic Physicians
Taxonomy Code207Q00000X
License✔ Licensed in IN · 01037757A
Definition
Family Medicine is the medical specialty which is concerned with the total health care of the individual and the family. It is the specialty in breadth which integrates the biological, clinical, and behavioral sciences. The scope of family medicine is not limited by age, sex, organ system, or disease entity.
Also ListedPreventive Medicine · Preventive Medicine/Occupational Environmental MedicineTaxonomy 2083P0500X · License 01037757A (IN)
11725 N ILLINOIS ST STE 250, Carmel, IN 46032
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Secondary Practice Location 1

Location 1409 E Washington StButler, IN 46721-1175 · Phone (260) 868-5843 · Fax (260) 868-5844

Other Identifiers 1

Medicaid200033390IN

Accepted Insurance

The full list of accepted plans is on the Insurance tab. Issuers include Ambetter from Buckeye Health Plan, Ambetter from Meridian, Ambetter Health and more.Insurance ›

Medicare Participation & PECOS CMS

Medicare enrollment, assignment, and ordering and referring status from the CMS PECOS system.

Medicare Enrollment Status

✔

Enrolled in Medicare and accepts Medicare assignment

Dr. Mark S O'brien Md is registered in PECOS and agrees to accept the Medicare-approved amount as full payment. Medicare patients are not billed beyond the standard deductible and coinsurance.

PECOS PAC ID5496812877
PECOS Enrollment IDI20090330000617
Eligible to Order & Refer✔ Part B Labs & Imaging✔ Durable Medical Equipment✔ Home Health Agency✔ Power Mobility DevicesPer the CMS Ordering and Referring file. Eligibility means Medicare pays claims that this provider orders or refers for these categories.

Areas of Expertise CMS Part B claims 8

Services this provider delivered to Medicare fee-for-service patients, from the CMS Medicare utilization data. Higher counts generally reflect more experience with a service; care delivered outside Medicare is not included.

Established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more 99214
This is a routine check-up for patients who have previously visited our clinic. It involves a comprehensive review of your health and any ongoing treatments. The consultation lasts between 30-39 minutes, allowing enough time to discuss any concerns.
415 services217 patients
Established patient office or other outpatient visit with low level od decision making, if using time, 20 minutes or more 99213
This is a routine visit for patients who have already been seen by the healthcare provider. During this approximately 20-29 minute appointment, your health status will be evaluated and any necessary treatments or tests will be discussed. It's a chance to address any health concerns you may have.
88 services71 patients
Administration of influenza virus vaccine G0008
The administration of the influenza virus vaccine, also known as the flu shot, is a simple procedure to protect against the flu. A healthcare provider injects a small dose of the vaccine into your arm. This stimulates your immune system to produce antibodies, which will help your body fight off the flu if exposed.
36 services34 patients
Influenza vaccine split virus, preservative free 90662
The Influenza Vaccine Split Virus, preservative-free, is a flu shot to protect against the influenza virus. It is made from parts of inactivated flu viruses and doesn't contain preservatives, reducing potential side effects. It helps your body develop immunity to the flu.
33 services31 patients
Hemoglobin a1c level 83036
Hemoglobin A1c (HbA1c) is a test that measures your average blood sugar level over the past 2-3 months. It's used to monitor how well diabetes is being controlled. High levels may indicate that your diabetes treatment plan needs adjustment.
24 services21 patients
Automated urinalysis test 81003
An automated urinalysis test is a routine examination that checks your urine for various substances. It can help identify potential health issues such as kidney problems or diabetes. The test uses a machine to analyze a small urine sample, providing quick and accurate results.
18 services17 patients

Hospital Affiliations CMS Care Compare 3

Hospitals where this provider delivers care, identified from recent Medicare claims and place-of-service records.

Indiana University Health

Acute Care Hospitals · Indianapolis, IN
3/5 CMS rating
OwnershipVoluntary non-profit - Private
CMS Certification Number150056
Location1701 N Senate BlvdIndianapolis, IN 46202 · Marion County
Emergency services Birthing friendly

Iu Health West Hospital

Acute Care Hospitals · Avon, IN
4/5 CMS rating
OwnershipProprietary
CMS Certification Number150158
Location1111 N Ronald Reagan PkwyAvon, IN 46123 · Hendricks County
Emergency services Birthing friendly

Indiana University Health North Hospital

Acute Care Hospitals · Carmel, IN
5/5 CMS rating
OwnershipVoluntary non-profit - Private
CMS Certification Number150161
Location11700 N Meridian StCarmel, IN 46032 · Hamilton County
Emergency services Birthing friendly

Physician Visit Costs CMS claims · ZIP area

Typical Medicare office-visit costs in the 46032 ZIP code area, from fee-for-service claims. These are area statistics, not this provider’s prices; actual charges vary by service and coverage.

New Patient
$82.04 typical visit price
range $53.07 – $161.76
Typical copayment $20.51 (range $13.26 – $40.44)
Most-billed visit code 99203
Established Patient
$94.22 typical visit price
range $16.93 – $132.22
Typical copayment $23.55 (range $4.23 – $33.05)
Most-billed visit code 99214
Amounts reflect what Medicare beneficiaries in this ZIP area are typically charged for office visits. Patients with other coverage should check their individual plans.

Referred Medical Equipment & Supplies CMS DME claims 3

Durable medical equipment, devices and supplies this provider ordered from DME suppliers for patients, from Medicare fee-for-service claims.

Blood glucose test or reagent strips for home blood glucose monitor, per 50 strips A4253
DME-Other DME · category DE017N
7 suppliers24 claims44 services$5.40 avg. paid by Medicare
Portable gaseous oxygen system, rental; includes portable container, regulator, flowmeter, humidifier, cannula or mask, and tubing E0431
DME-Oxygen and Supplies · category DC000N
2 suppliers20 claims21 services$14.45 avg. paid by Medicare
Oxygen concentrator, single delivery port, capable of delivering 85 percent or greater oxygen concentration at the prescribed flow rate E1390
DME-Oxygen and Supplies · category DC002N
2 suppliers20 claims21 services$66.53 avg. paid by Medicare
Dollar amounts are the average Medicare paid the supplier per service. They are not the cost to the patient.

Frequently Asked Questions NPPES & CMS

Common questions about this NPI record, answered from the official NPPES registry and CMS datasets shown on this page.

What is Mark O'brien's NPI number?

The NPI number for Mark O'brien is 1124129267. It was assigned to this individual provider in the NPPES registry on September 25, 2006.

Where is Mark O'brien located?

Mark O'brien practices at 11725 N Illinois St Ste 250, Carmel, IN 46032. The listed phone number is (317) 688-5300.

What is Mark O'brien's specialty?

The primary specialty registered for this NPI is Family Medicine with taxonomy code 207Q00000X.

Is Mark O'brien enrolled in Medicare?

Yes. Mark O'brien is registered in the Medicare PECOS system and accepts Medicare assignment, which means accepting the Medicare-approved amount as payment in full for covered services.

What insurance does Mark O'brien accept?

Health plans from Ambetter Health, Ambetter from Buckeye Health Plan, Ambetter from Meridian, Anthem Blue Cross and Blue Shield and CareSource and 1 other insurer list Mark O'brien as in-network in at least one marketplace plan. Coverage varies by plan and year; verify with the insurer or the provider before a visit.

Is Mark O'brien affiliated with any hospitals?

According to CMS data, Mark O'brien is affiliated with Indiana University Health, Iu Health West Hospital and Indiana University Health North Hospital.

When was this NPI record last updated?

The NPPES record for Mark O'brien was last updated on January 6, 2021. NPI Profile syncs with the weekly NPPES data releases published by CMS.