Gregory O'Brien, D.P.T, CSCS
Physical Therapist · Marion, IA
Gregory O'Brien, D.P.T, CSCS is a physical therapist with a practice address in Marion, Iowa, and NPI 1447663505, issued on Jun 6, 2014. Check the license (Iowa 004514, as entered in NPPES) with the Iowa board that licenses this profession; the Medicare figures below come from public CMS files.
- Name
- Gregory O'Brien
- Credential
- D.P.T, CSCS
- Primary taxonomy
- Physical Therapist 225100000X
- License number
- 004514 IA
Self-reported in NPPES; status is on the state search - Practice location
- 999 44TH St, Marion, IA 52302
- Phone
- (319) 373-7311
- Enumerated
- Jun 6, 2014
- Record last updated
- Jul 16, 2025
- Fax
- (319) 373-7313
- Medicare enrollment
- Enrolled (PECOS I20140709000972); accepts Medicare assignment
- Entity
- Type 1 · individual
Also registered at 999 44TH St
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Janet Burbridge, PT, MSPhysical Therapist1205930716
- Tonya Epp, DPTPhysical Therapist1003284266
- Jean Hammill, PT, DPT, MA, OCS,ATCPhysical Therapist1548372014
- Michael Reiling, PT, MS, ATC, CSCSPhysical Therapist1164523544
- David Rubsam, PT, OCS, ASTYMPhysical Therapist1124346507
- Sadie Sell, LMTMassage Therapist1811361017
Verify Gregory O'Brien in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersWhich Iowa board licenses this profession
Search for license 004514Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
Bills Medicare through one group practice
- Ability Physical Therapy PCMarion, IA
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
23 physical therapist records list a practice address in Marion
They are 23 of the 260 NPPES records with a practice address in Marion, and 2,671 physical therapist records in Iowa.
All 23 in Marion → All 2,671 in Iowa → Every provider in Marion →
Other physical therapist records in Iowa
- Monica Aalbers, MPT, ATCOrange City, IA1669502712
- Jacqueline Aanestad, PTWest Des Moines, IA1104879840
- Sarah AbbottWest Des Moines, IA1679128961
- Jason Abbuhl, DPTIowa City, IA1629317698
- Nadeem Abdulhafedh, DPTDes Moines, IA1891166070
- Ronald AbellanaCoralville, IA1760221287
- Dianne Abels, PHYSICAL THERAPISTDavenport, IA1821251588
- Elaina Abrams, PT, DPTCoralville, IA1235836164
- Emily Accurso, DPTUrbandale, IA1285586602
- Adam AchesonDavenport, IA1336775865
Common questions
What is Gregory O'Brien, D.P.T, CSCS's NPI number?
Gregory O'Brien, D.P.T, CSCS's National Provider Identifier (NPI) is 1447663505, issued on Jun 6, 2014. An NPI identifies a provider in billing; it is not a license.
Where is Gregory O'Brien, D.P.T, CSCS located?
The NPPES record lists a practice address at 999 44TH St, Marion, IA, 52302. Phone: (319) 373-7311. Providers update this record themselves, so call before visiting.
How can I verify Gregory O'Brien, D.P.T, CSCS's license?
NPPES lists Iowa license number 004514, as entered by the provider. Search the Iowa board that licenses this profession; the NPPES record confirms identity only.
Source: CMS National Plan and Provider Enumeration System (NPPES), file of Aug 9, 2026 (NPPES files on CMS.gov); NUCC Health Care Provider Taxonomy. Medicare files from data.cms.gov. 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.