Mark D. O'Brien, D.O.
Pediatrics Physician · Fort Wayne, IN
Mark D. O'Brien, D.O. is a pediatrics physician with a practice address in Fort Wayne, Indiana, and NPI 1265532212, issued on Sep 22, 2006. Check the license (Indiana 02001451A, as entered in NPPES) on the Medical Licensing Board of Indiana; the federal record below is the public data PlainDoctor holds for this provider.
- Name
- Mark D. O'Brien
- Credential
- D.O.
- Primary taxonomy
- Pediatrics Physician 208000000X
- License number
- 02001451A IN
Self-reported in NPPES; status is on the state search - Practice location
- 6507 E State Blvd, Fort Wayne, IN 46815
- Phone
- (260) 486-3300
- Enumerated
- Sep 22, 2006
- Record last updated
- Apr 14, 2025
- Fax
- (260) 486-3600
- Medicaid ID
- 200931380 IN
- Entity
- Type 1 · individual
8 nearest pediatrics physician records → All 1,136 in Indiana → Look up another NPI →
Also registered at 6507 E State Blvd
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Sara Bauer, NPNurse Practitioner1215084124
- Julie Bryan, M.D.Internal Medicine Physician1063496644
- Christy Buuck, PAPhysician Assistant1164613410
- Ashraf Hanna, MDFamily Medicine Physician1720153919
- Courtney Jackson, MDFamily Medicine Physician1013533926
- Shelli Jenkins, NP-CNurse Practitioner1174505432
Verify Mark D. O'Brien in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMedical Licensing Board of Indiana
Search for license 02001451ACheck the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
Mark D. O'Brien among 1,136 pediatrics physician records in Indiana
Mark D. O'Brien, D.O. is one of 1,136 pediatrics physician records with a practice address in Indiana. 43% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does not. Its NPI, issued in 2006, is newer than 15% of them.
- NPI issued2006 · 15% of these records are older, 52% newer
- In a Medicare fileNo · 43% of these records are
- In the CMS Doctors and Clinicians fileNo · 12% of these records are
- Record last updated2025 · 42% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 208000000X and a Indiana practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
Pediatrics Physician providers in Indiana
There are 1,136 pediatrics physician records in Indiana. No Medicare prescribing, quality score, industry payment or hospital affiliation is published for this NPI.
All 1,136 in Indiana → Every provider in Fort Wayne → Pediatrics Physician nationwide →
The 8 pediatrics physician records with the nearest ZIP codes
- Reshma Khatri, MDFort Wayne, IN 468141275737249
- Shobana PandianFort Wayne, IN 468141619940970
- Kristin Will, M.D.Fort Wayne, IN 468141891958682
- Lilioza Gzyl, MDFort Wayne, IN 468081184715567
- Alexandru Tanase, M.D.Fort Wayne, IN 468081760473144
- Deborah Abaitey, MDFort Wayne, IN 468051134555634
- Grant Adams, MDFort Wayne, IN 468251316528276
- Hannah Ashworth, MDFort Wayne, IN 468251972132355
Common questions
What is Mark D. O'Brien, D.O.'s NPI number?
Mark D. O'Brien, D.O.'s National Provider Identifier (NPI) is 1265532212, issued on Sep 22, 2006. An NPI identifies a provider in billing; it is not a license.
Where is Mark D. O'Brien, D.O. located?
The NPPES record lists a practice address at 6507 E State Blvd, Fort Wayne, IN, 46815. Phone: (260) 486-3300. Providers update this record themselves, so call before visiting.
How can I verify Mark D. O'Brien, D.O.'s license?
NPPES lists Indiana license number 02001451A, as entered by the provider. Search the Medical Licensing Board of Indiana at https://www.in.gov/pla/professions/physicians-home/. The NPPES record confirms identity only; the state search shows license status, expiration and public orders.
Source: CMS National Plan and Provider Enumeration System (NPPES), file of Aug 9, 2026 (NPPES files on CMS.gov); NUCC Health Care Provider Taxonomy. An NPI identifies who bills; it is not a license.
Figures on PlainDoctor are read from the federal files each page names (CMS NPPES, Medicare Part D, MIPS, Open Payments; the HHS-OIG exclusion list only as counts) and from Census population estimates, with the file date shown beside them. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error. Data current as of Aug 9, 2026.