Quick answers
- Where does Chiamaka Onah see patients?
- Medicare's clinician data lists 4 practice locations, including Dayton, OH, Phoenix, AZ and Glendale, AZ. Call before your visit to confirm the address.
- What is Chiamaka Onah's specialty?
- Medicare lists Internal Medicine as the primary specialty.
- Does Chiamaka Onah accept Medicare assignment?
- Yes. Medicare's clinician data says Chiamaka Onah accepts Medicare assignment (the Medicare-approved amount as full payment for covered services), as of 2026-10-02. Ask the office to confirm before your visit.
- What is the phone number for Chiamaka Onah?
- (602) 406-3000, as listed in official Medicare / NPI Registry data.
- What is Chiamaka Onah's NPI number?
- 1922637909. The NPI (National Provider Identifier) is the clinician's permanent federal ID; you can look it up in the official NPI Registry.
Practice locations
Addresses where Chiamaka Onah is enrolled with Medicare (CMS data updated 2026-10-02).
- 33 W Rahn Rd, Suite 101Dayton, OH 45429
- 350 W Thomas RdPhoenix, AZ 85013 (602) 406‑3000
- 3535 Southern BlvdDayton, OH 45429
- 7300 N 99th AveGlendale, AZ 85307 (602) 406‑3000
Group practices
Medicare enrollment lists Chiamaka Onah as a member of these groups (CMS data updated 2026-10-02).
- South Dayton Acute Care Consultants, Inc119 clinicians in the group
- Zion Medical Group PLLC34 clinicians in the group
Specialties
- Internal Medicineprimary
Other internal medicine doctors in Dayton
Clinicians with the same Medicare primary specialty in Dayton, OH — not a recommendation.
Clinician information
| Credential | MD |
|---|---|
| Graduation year | 2015 |
| Gender (as listed) | Female |
| Medicare assignment | Accepts (Medicare-approved amount as full payment) |
| NPI (National Provider Identifier) | 1922637909 |
| Corrections | Report an error or suggest an update → |
Most corrections must be made at the source: clinicians update their NPI Registry record (NPPES) and their Medicare enrollment (PECOS); this page follows the next data release.
Sources
- National Downloadable File (Doctors and Clinicians) — CMS, data updated 2026-10-02, retrieved 2026-10-29
- NPI Registry — U.S. Department of Health and Human Services (NPPES), the clinician’s official record
- Medicare Care Compare — official Medicare tool to look up clinicians