Daniel O'Brien, M.D.
Transplant Surgery Physician · Milwaukee, WI
Daniel O'Brien, M.D. is a transplant surgery physician with a practice address in Milwaukee, Wisconsin, and NPI 1548659980, issued on Jan 22, 2015. Check the license (Wisconsin 82286, as entered in NPPES) with the Wisconsin board that licenses this profession; the Medicare figures below come from public CMS files.
- Name
- Daniel O'Brien
- Credential
- M.D.
- Primary taxonomy
- Transplant Surgery Physician 204F00000X
- License numbers
- 82286 WI
A173264 CA
036-165946 IL
11018992A IN
Self-reported in NPPES; status is on the state search - Practice location
- 2900 W Oklahoma Ave, Milwaukee, WI 53215
- Phone
- (414) 649-6000
- Enumerated
- Jan 22, 2015
- Record last updated
- Oct 19, 2023
- Medicaid ID
- 100246297 WI
- Medicare enrollment
- Enrolled (PECOS I20230814000703); accepts Medicare assignment
- Medical or professional school
- Northwestern University Feinberg Medical School, 2016
- Entity
- Type 1 · individual
8 nearest transplant surgery physician records → All 42 in Wisconsin → Look up another NPI →
Also registered at 2900 W Oklahoma Ave
A shared address usually means a shared clinic or building; it does not show who employs whom.
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- Zaid Abood, MDHospitalist Physician1194254334
- Syed AbutalibHematology & Oncology Physician1114183290
- Kalid Adab, MDHematology & Oncology Physician1346473345
Verify Daniel O'Brien in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersWhich Wisconsin board licenses this profession
Search for license 82286Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
24% fewer Medicare Part D claims than the average transplant surgery physician in 2024
197 Medicare Part D claims for 35 beneficiaries, against an average of 260 among the 541 providers of this specialty who prescribed in Part D.
Most prescribed
- Sulfamethoxazole-Trimethoprim69 claims
- Valganciclovir Hcl52 claims
- Mycophenolic Acid12 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
- Advocate Health And Hospitals CorporationOak Lawn, IL
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Daniel O'Brien among 42 transplant surgery physician records in Wisconsin
Daniel O'Brien, M.D. is one of 42 transplant surgery physician records with a practice address in Wisconsin. 83% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2015, is newer than 62% of them.
- NPI issued2015 · 62% of these records are older, 24% newer
- In a Medicare fileYes · 83% of these records are
- In the CMS Doctors and Clinicians fileYes · 76% of these records are
- Graduated2016 · median 2007 among the 32 with a school on file
- Record last updated2023 · 38% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 204F00000X and a Wisconsin practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
Transplant Surgery Physician providers in Wisconsin
There are 42 transplant surgery physician records in Wisconsin.
All 42 in Wisconsin → Every provider in Milwaukee → Transplant Surgery Physician nationwide →
The 8 transplant surgery physician records with the nearest ZIP codes
- Tyler Burnett, MDMilwaukee, WI 532151275916447
- Gaurav Jain, MDMilwaukee, WI 532151457788564
- Hoonbae Jeon, M.D.Milwaukee, WI 532151881652352
- Narendra Battula, MDMilwaukee, WI 532261366825408
- Matthew Cooper, M.D.Milwaukee, WI 532261740204965
- Ty Dunn, MDMilwaukee, WI 532261164423893
- Calvin Eriksen, MDMilwaukee, WI 532261194967000
- Ryan Helmick, MDMilwaukee, WI 532261972792117
Common questions
What is Daniel O'Brien, M.D.'s NPI number?
Daniel O'Brien, M.D.'s National Provider Identifier (NPI) is 1548659980, issued on Jan 22, 2015. An NPI identifies a provider in billing; it is not a license.
Where is Daniel O'Brien, M.D. located?
The NPPES record lists a practice address at 2900 W Oklahoma Ave, Milwaukee, WI, 53215. Phone: (414) 649-6000. Providers update this record themselves, so call before visiting.
How can I verify Daniel O'Brien, M.D.'s license?
NPPES lists Wisconsin license number 82286, as entered by the provider. Search the Wisconsin board that licenses this profession; the NPPES record confirms identity only.
How much does Daniel O'Brien, M.D. prescribe under Medicare Part D?
In 2024, Daniel O'Brien, M.D. had 197 Medicare Part D claims for 35 beneficiaries; the average among transplant surgery physician prescribers was 260. 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.