Dr. Marcus D. O'Brien, MD
- Hospital affiliations
- 1
- Medical groups
- 2
- State license
- 1
- Year NPI issued
- 2006
- Practice address
- 1 Children's Way, Slot 301, Little Rock, AR 72202
- Practice phone
- Call (501) 364-1100
- Professional email
- Get professional email
- Personal email
- Get personal email
- Mobile number
- Get mobile number
Primary practice
Find Dr. O'Brien's professional email, personal email and mobile number
Dmand AI checks each channel through healthcare-specific waterfall enrichment. See what is on file with a free account, with practice phones, licenses and affiliations.
Dr. Marcus D. O'Brien is a pediatrician in Little Rock, Arkansas
Dr. O'Brien practices at Arkansas Children's Hospital in Little Rock, Arkansas, part of Arkansas Children's.
Dr. O'Brien's NPI, 1215944772, was assigned on August 1, 2006. Dr. O'Brien holds Arkansas license C-6643.
- NPI
- 1215944772NPI Registry (opens in a new tab)
- NPI enumeration date
- August 1, 2006
- NPI status
- Active
- Practice phone
- (501) 364-1100
- Professional email
- Get email
- Personal email
- Get email
- Mobile number
- Get number
- Sex
- Male
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; and Dmand AI Affiliation Data
Dr. Marcus D. O'Brien practices at Arkansas Children's Hospital in Little Rock, Arkansas
Dr. O'Brien's primary practice is Arkansas Children's Hospital, at 1 Children's Way, Slot 301, Little Rock, AR 72202 in Pulaski County. The practice phone is (501) 364-1100.
- Arkansas Children's Hospital1 Children's Way, Slot 301, Little Rock, AR 72202 · Pulaski CountyPhone(501) 364-1100
Source: Dmand AI Affiliation Data
Dr. Marcus D. O'Brien is affiliated with 1 site of care and 2 medical groups
Dr. O'Brien's primary practice is Arkansas Children's Hospital in Little Rock, Arkansas, part of Arkansas Children's. The medical group on file is Arkansas Children's Hospital. Dmand AI also links Dr. O'Brien to 1 more medical group, named with a free account. Dr. O'Brien's employer is on file too: a hospital.
Sources: Dmand AI Affiliation Data; and Dmand AI Org Hierarchy Data
Dmand AI tracks the EHR system at Dr. Marcus D. O'Brien's practice
Dmand AI tracks the electronic health record (EHR) system at each site where Dr. O'Brien practices. Vendor and product names are available with a free account.
| Site | EHR vendor and product |
|---|---|
| Arkansas Children's Hospital | Available with a free account |
| +1 medical group | Available with a free account |
Source: Dmand AI Technology Install Data
For health IT teams
Dmand AI maps EHR vendors, IT decision makers and buying committees across Arkansas Children's and 6.2K+ hospitals, with verified contacts in the same login.
Dr. Marcus D. O'Brien is one of 395 pediatricians in Arkansas
Pediatrics is Dr. O'Brien's primary specialty in the NPI Registry, under taxonomy code 208000000X. Dr. O'Brien is licensed in Arkansas.
Specialties and state licenses
- Pediatrics, ArkansasPrimary
Pediatricians near Dr. O'Brien
Counts of pediatricians with a Dmand AI profile, by place and practice. Each opens the list.
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; and Dmand AI Peer Benchmarks
Dr. Marcus D. O'Brien's patients have a median age of 15
Across all payers, Dmand AI patient panel data puts Dr. O'Brien's median patient age at 15, with 44% women.
Dr. O'Brien's patients across all payers
Dmand AI patient panel data covers Medicare, Medicaid and commercial patients.
Patient panel by age, all payers
Median age 15
Patient panel by sex, all payers
- Women44%
- Men56%
Source: Dmand AI Patient Panel Data
Sources for Dr. Marcus D. O'Brien's profile data
| Data on this page | Source |
|---|---|
| NPI, name, sex, specialty and licenses | NPPES NPI Registry (CMS) (opens in a new tab)Dmand AI Professional Profile Data |
| Practice locations and phone | Dmand AI Affiliation Data |
| Primary practice, affiliations and health system | Dmand AI Affiliation DataDmand AI Org Hierarchy Data |
| Medicare patients and the all-payer patient panel | Dmand AI Patient Panel Data |
| EHR at each practice site | Dmand AI Technology Install Data |
| Similar physicians | Dmand AI Affiliation Data |
Data last refreshed October 2026Report an inaccuracyRemove my information
FAQ
Frequently asked questions about Dr. Marcus D. O'Brien
Spotted something out of date? Email hello@dmand.ai and we will check the record. Contact details live in the free trial.
What is Dr. Marcus D. O'Brien's NPI number?
Dr. Marcus D. O'Brien's NPI number is 1215944772. It was assigned on August 1, 2006, and it is active in the NPI Registry.
What kind of doctor is Dr. Marcus D. O'Brien?
Dr. Marcus D. O'Brien is a pediatrician in Little Rock, Arkansas. The primary specialty in the NPI Registry is Pediatrics Physician (taxonomy code 208000000X).
Where does Dr. Marcus D. O'Brien practice?
Dr. O'Brien practices at 1 Children's Way, Slot 301, Little Rock, AR 72202. Dr. O'Brien's primary practice is Arkansas Children's Hospital in Little Rock, Arkansas, part of Arkansas Children's. Dmand AI also links Dr. O'Brien to 1 medical group.
What is Dr. Marcus D. O'Brien's office phone number?
The practice phone on file for Dr. O'Brien is (501) 364-1100.
What is Dr. Marcus D. O'Brien's medical license number?
Dr. O'Brien holds Arkansas license C-6643.
Which hospitals is Dr. Marcus D. O'Brien affiliated with?
Dr. O'Brien practices at Arkansas Children's Hospital in Little Rock, Arkansas.
What medical group is Dr. Marcus D. O'Brien part of?
Dr. O'Brien is linked to Arkansas Children's Hospital. Dmand AI links Dr. O'Brien to 1 more medical group.
How long has Dr. Marcus D. O'Brien been practicing?
Dr. O'Brien's NPI was assigned in 2006.
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