Daniel Eric O'Brien, M.D.
Internal Medicine Physician · Metamora, IL
Daniel Eric O'Brien, M.D. is an internal medicine physician with a practice address in Metamora, Illinois, and NPI 1275741829, issued on May 18, 2007. Check the license (Illinois 036121512, as entered in NPPES) on the Illinois Department of Financial and Professional Regulation; the Medicare figures below come from public CMS files.
- Name
- Daniel Eric O'Brien
- Credential
- M.D.
- Primary taxonomy
- Internal Medicine Physician 207R00000X
- License number
- 036121512 IL
Self-reported in NPPES; status is on the state search - Practice location
- 928 W Mount Vernon St, Metamora, IL 61548
- Phone
- (309) 367-2321
- Enumerated
- May 18, 2007
- Record last updated
- Aug 11, 2023
- Medicare enrollment
- Enrolled (PECOS I20090727000717); accepts Medicare assignment
- Medical or professional school
- University Of Illinois College Of Med (Chi/Peor/Rock/Chm-Urb), 2006
- Entity
- Type 1 · individual
Also registered at 928 W Mount Vernon St
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Susan Wolf, APNNurse Practitioner1396144663
Verify Daniel Eric O'Brien in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersIllinois Department of Financial and Professional Regulation
Search for license 036121512Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
94% fewer Medicare Part D claims than the average internal medicine physician in 2024
180 Medicare Part D claims for 129 beneficiaries, against an average of 3,176 among the 108,855 providers of this specialty who prescribed in Part D. Brand-name drugs were 9% of claims. 13 claims were for opioids.
Most prescribed
- Prednisone27 claims
- Nitrofurantoin Mono-Macro21 claims
- Azithromycin15 claims
- Levofloxacin15 claims
- Cyclobenzaprine Hcl13 claims
Source: CMS Medicare Part D Prescribers by Provider and Drug, 2024 (data.cms.gov). Part D covers prescriptions for Medicare patients only; drugs with fewer than 11 claims are not published.
Bills Medicare through one group practice
- Osf Multi-Specialty GroupDixon, IL
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
1 internal medicine physician records list a practice address in Metamora
They are 1 of the 53 NPPES records with a practice address in Metamora, and 7,238 internal medicine physician records in Illinois.
Other internal medicine physician records in Illinois
- Peter Abadeer, D.O.Bloomington, IL1760469522
- Motaz Abas, MDPeoria, IL1215510201
- Elias Abate, M.D.Chicago, IL1336712199
- Maliha Abbas, D.O.Chicago, IL1174963920
- Zareena Abbas, MDChicago, IL1427078872
- Abu Abbasi, MDChicago, IL1083243877
- Ayesha Abbasi, MDChicago, IL1376216705
- Khalda Abbasi, MDNaperville, IL1487705240
- Elmer Abbo, MDBurr Ridge, IL1710048541
- Paul Abbo, M.D.River Forest, IL1083693378
Common questions
What is Daniel Eric O'Brien, M.D.'s NPI number?
Daniel Eric O'Brien, M.D.'s National Provider Identifier (NPI) is 1275741829, issued on May 18, 2007. An NPI identifies a provider in billing; it is not a license.
Where is Daniel Eric O'Brien, M.D. located?
The NPPES record lists a practice address at 928 W Mount Vernon St, Metamora, IL, 61548. Phone: (309) 367-2321. Providers update this record themselves, so call before visiting.
How can I verify Daniel Eric O'Brien, M.D.'s license?
NPPES lists Illinois license number 036121512, as entered by the provider. Search the Illinois Department of Financial and Professional Regulation at https://idfpr.illinois.gov/checklicense.html. The NPPES record confirms identity only; the state search shows license status, expiration and public orders.
How much does Daniel Eric O'Brien, M.D. prescribe under Medicare Part D?
In 2024, Daniel Eric O'Brien, M.D. had 180 Medicare Part D claims for 129 beneficiaries; the average among internal medicine physician prescribers was 3,176. Part D covers Medicare prescriptions 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.