Vivian U. Onunkwo, MD
Occupational Medicine Physician · Elkhart, IN
Vivian U. Onunkwo, MD is an occupational medicine physician with a practice address in Elkhart, Indiana, and NPI 1952612392, issued on Jun 30, 2010. Check the license (Indiana 01078860A, as entered in NPPES) on the Medical Licensing Board of Indiana; the Medicare figures below come from public CMS files.
- Name
- Vivian U. Onunkwo
- Credential
- MD
- Primary taxonomy
- Occupational Medicine Physician 2083X0100X
- License numbers
- 01078860A IN
4301113897 MI
Self-reported in NPPES; status is on the state search - Practice location
- 22818 Old US 20, Elkhart, IN 46516
- Phone
- (574) 389-1231
- Enumerated
- Jun 30, 2010
- Record last updated
- Sep 26, 2023
- Medicaid ID
- 1952612392 MI
- Entity
- Type 1 · individual
8 nearest occupational medicine physician records → All 54 in Indiana → Look up another NPI →
Also registered at 22818 Old US 20
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Theresa Clark, FNP-BCFamily Nurse Practitioner1548893506
- Andrea KarafaFamily Nurse Practitioner1962953760
- Stephen Lantz, MDOccupational Medicine Physician1992076079
- James Shay, PTPhysical Therapist1992922538
- Judith Smith, PA-CPhysician Assistant1124115795
- Sarah Wright, NPNurse Practitioner1861158842
Verify Vivian U. Onunkwo in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMedical Licensing Board of Indiana
Search for license 01078860ACheck the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
96% fewer Medicare Part D claims than the average occupational medicine physician in 2024
31 Medicare Part D claims, against an average of 794 among the 463 providers of this specialty who prescribed in Part D. Brand-name drugs were 0% of claims.
Most prescribed
- Cefazolin Sodium20 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.
Vivian U. Onunkwo among 54 occupational medicine physician records in Indiana
Vivian U. Onunkwo, MD is one of 54 occupational medicine physician records with a practice address in Indiana. 26% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2010, is newer than 85% of them.
- NPI issued2010 · 85% of these records are older, 9% newer
- In a Medicare fileYes · 26% of these records are
- In the CMS Doctors and Clinicians fileNo · 2% of these records are
- Record last updated2023 · 70% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 2083X0100X and a Indiana practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
Occupational Medicine Physician providers in Indiana
There are 54 occupational medicine physician records in Indiana.
All 54 in Indiana → Every provider in Elkhart → Occupational Medicine Physician nationwide →
The 8 occupational medicine physician records with the nearest ZIP codes
- Stephen Lantz, MDElkhart, IN 465161992076079
- Christine Cisneros, M.D.Elkhart, IN 465141003004524
- Karen Sarpolis, M.D.Goshen, IN 465261033730577
- Scott Edwards, M.D.Granger, IN 465301114220589
- Saurabh Joneja, M.D.Mishawaka, IN 465451649460619
- Timothy Lund, MDWarsaw, IN 465821265475701
- Eric Wohlrab, M.D.South Bend, IN 466281912982117
- Troy Bergin, M.D.South Bend, IN 466371578783551
Common questions
What is Vivian U. Onunkwo, MD's NPI number?
Vivian U. Onunkwo, MD's National Provider Identifier (NPI) is 1952612392, issued on Jun 30, 2010. An NPI identifies a provider in billing; it is not a license.
Where is Vivian U. Onunkwo, MD located?
The NPPES record lists a practice address at 22818 Old US 20, Elkhart, IN, 46516. Phone: (574) 389-1231. Providers update this record themselves, so call before visiting.
How can I verify Vivian U. Onunkwo, MD's license?
NPPES lists Indiana license number 01078860A, 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.
How much does Vivian U. Onunkwo, MD prescribe under Medicare Part D?
In 2024, Vivian U. Onunkwo, MD had 31 Medicare Part D claims; the average among occupational medicine physician prescribers was 794. 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.