Vivian Onunkwo, MD
NPI 1952612392 · Occupational Medicine Physician · Elkhart, IN
Enrolled with Medicare as Practitioner - General Practice · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Vivian Onunkwo, MD is a Occupational Medicine Physician provider in Elkhart, IN (NPI 1952612392).
Provider details
- NPI number
- 1952612392
- Entity type
- Individual
- Primary specialty
- Occupational Medicine PhysicianAllopathic & Osteopathic Physicians
- Credential
- MD
- Sex
- Female
- Sole proprietor
- No
- License
- 4301113897 (MI)
Specialties & taxonomies
Allopathic & Osteopathic Physicians
Allopathic & Osteopathic Physicians
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure38% of score
16 yrs in NPPES registry
- Profile completeness38% of score
100% of core fields populated
- Practice footprint23% of score
2 documented practice locations
Signals a provider has no public data for (e.g. Medicare claims) are left out of the score entirely — never counted as zero — so providers without that data are not penalized. See the full formula and weights in our methodology.
What this provider prescribes (Medicare Part D)
Top drugs by Medicare Part D claim volume, 2024 · 1 distinct drug on file.
| Drug | Part D claims (2024) |
|---|---|
| Cefazolin Sodium | 20 |
Medicare Part D only. These counts cover prescriptions paid through Medicare Part D in 2024 — they do notinclude cash-pay, commercial-insurance, Medicaid, or Part B–administered drugs, and badly undercount high cash-pay categories (e.g. GLP-1 weight-loss, testosterone, and ED medications). Any drug with 10 or fewer claims is omitted by CMS, and beneficiary counts under 11 are suppressed — so a missing drug means no Part D record, never zero. This is a factual claims summary, not an endorsement, not medical advice, and not a consumer report. Source: CMS Medicare Part D Prescribers — by Provider and Drug.
Practice location
Mailing address
Additional practice locations (1)
- 16587 Enterprise DrThree Rivers, MI 49093-7902Phone: (269) 279-6700Fax: (269) 273-9612
Registry dates
- Enumerated
- 2010-06-30
- Last updated
- 2023-09-26
- Certified
- 2023-09-26
Frequently asked questions
- What is Vivian Onunkwo's NPI number?
- Vivian Onunkwo's National Provider Identifier (NPI) is 1952612392, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Vivian Onunkwo's specialty?
- Vivian Onunkwo is listed in the NPPES registry with a primary specialty of Occupational Medicine Physician (Allopathic & Osteopathic Physicians).
- Where is Vivian Onunkwo located?
- Vivian Onunkwo's practice location on file with NPPES is 22818 Old US 20, Elkhart, IN 46516-9150.
- What is Vivian Onunkwo's phone number?
- The practice phone number listed in the NPPES registry for Vivian Onunkwo is (574) 389-1231.
- Does Vivian Onunkwo accept Medicare?
- Vivian Onunkwo is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Vivian Onunkwo's NPI active?
- Yes — Vivian Onunkwo's NPI (1952612392) is active in the NPPES registry as of the last update on 2023-09-26.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.