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DR. CHIEDU CHARLES ONUNKWO M.D.
NPI 1992752018
Internal Medicine - Infectious Disease in South Bend, IN

Active since May 27, 2006PECOS EnrolledAccepts Medicare Assignment
621 MEMORIAL DR STE 624, SOUTH BEND, IN 46601(574) 647-8177(574) 647-8536 Get Directions Write a Review

NPPES record last updated: January 4, 2023. Verified against the NPPES registry weekly; last sync: October 25, 2026.

Record update history: Jan 4, 2023, Mar 31, 2021, Jul 10, 2017 (3 updates tracked since 2017).

About Dr. Chiedu Charles Onunkwo M.d. NPPES

Official registry information on file with the National Plan and Provider Enumeration System.

DR. CHIEDU CHARLES ONUNKWO M.D. (NPI 1992752018) is an individual infectious disease provider in South Bend, Indiana, licensed in Indiana (01060521A) and active in the NPI registry since May 2006. He is enrolled in Medicare PECOS, is affiliated with Elkhart General Hospital, and maintains 2 additional practice locations.

NPPES Registry Identity

NPI1992752018
Entity TypeIndividualMale
Primary Taxonomy207RI0200X
Provider Legal NameDR. CHIEDU CHARLES ONUNKWOCredential: M.D.
Location Address621 MEMORIAL DR STE 624South Bend, IN 46601-1063
Mailing Address710 N Niles AveSouth Bend, IN 46617-1924 · (574) 647-1610 · Fax (574) 237-6069
Phone(574) 647-8177
Fax(574) 647-8536
Sole ProprietorNo
Medical School CMSOtherGraduated 1998
Enumeration DateMay 27, 2006
Last NPPES UpdateJanuary 4, 20233 updates tracked since enumeration
NPPES CertifiedJanuary 4, 2023
✔ NPI 1992752018 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses 2

★ Primary SpecialtyInternal Medicine · Infectious DiseaseAllopathic & Osteopathic Physicians
Taxonomy Code207RI0200X
License✔ Licensed in IN · 01060521A
Definition
An internist who deals with infectious diseases of all types and in all organ systems. Conditions requiring selective use of antibiotics call for this special skill. This physician often diagnoses and treats AIDS patients and patients with fevers which have not been explained. Infectious disease specialists may also have expertise in preventive medicine and travel medicine.
Also ListedInternal MedicineTaxonomy 207R00000X · License 01060521A (IN)
621 MEMORIAL DR STE 624, South Bend, IN 46601
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Secondary Practice Locations 2

Location 1500 Arcade Ave Ste 210Elkhart, IN 46514-2485 · Phone (574) 389-5656
Location 25314 Lincolnway EMishawaka, IN 46544-4249 · Phone (574) 256-9032 · Fax (574) 256-9049

Accepted Insurance

The full list of accepted plans is on the Insurance tab. Issuers include Ambetter from Buckeye Health Plan, Ambetter from Meridian, Ambetter Health and more.Insurance ›

Medicare Participation & PECOS CMS

Medicare enrollment, assignment, billing reassignment, and ordering and referring status from CMS.

Medicare Enrollment Status

✔

Enrolled in Medicare and accepts Medicare assignment

Dr. Chiedu Charles Onunkwo M.d. is registered in PECOS and agrees to accept the Medicare-approved amount as full payment. Medicare patients are not billed beyond the standard deductible and coinsurance.

PECOS PAC ID8325066988
PECOS Enrollment IDI20170721000181
Eligible to Order & Refer✔ Part B Labs & Imaging✔ Durable Medical Equipment✔ Home Health Agency✔ Power Mobility DevicesPer the CMS Ordering and Referring file. Eligibility means Medicare pays claims that this provider orders or refers for these categories.

Medicare Billing Reassignments

2

Medicare enrollment records show Chiedu Onunkwo reassigns Medicare billing to 2 organizations. Each organization bills Medicare for the services this provider delivers there; the nearest is listed first.

Memorial Health System, Inc.
Same address
Cardiovascular Disease
621 MEMORIAL DR, SUITE 608
South Bend, IN 46601
  • Reassigned Medicare billing, Indiana enrollment
  • Medicare enrollment name: Beacon Medical Group Inc
  • 734 clinicians in this Medicare group
NPI 1073554994 (574) 232-3522
City Of Hope Medical Group Of Georgia LLC
578 mi
Internal Medicine
600 CELEBRATE LIFE PARKWAY
Newnan, GA 30265
  • Reassigned Medicare billing, Georgia enrollment
  • 448 clinicians in this Medicare group
NPI 1447520333 (847) 746-4333

Source: CMS Revalidation Reassignment List, October 2026 release. Reassignment records can lag staffing changes; confirm a current affiliation with the organization.

Areas of Expertise CMS Part B claims 6

Services this provider delivered to Medicare fee-for-service patients, from the CMS Medicare utilization data. Higher counts generally reflect more experience with a service; care delivered outside Medicare is not included.

Subsequent hospital care with moderate levelof medical decision making, if using time, at least 35 minutes 99232
Follow-up hospital inpatient care involves daily check-ups while you're admitted in the hospital. Typically, a healthcare provider spends about 25 minutes each day reviewing your condition, adjusting treatment if needed, and answering any questions you might have.
284 services118 patients
Initial hospital care with straightforward or low-level medical decision making, if using time, at least 55 minutes 99222
Initial hospital inpatient care is a service where a healthcare provider spends about 50 minutes per day overseeing your care while you're admitted in the hospital. This includes reviewing your health status, planning your treatment, and ensuring your safety and comfort.
148 services138 patients
Initial hospital care with moderate level of medical decision making, if using time, at least 75 minutes 99223
Initial hospital inpatient care per day, typically 70 minutes, refers to the daily medical service provided to patients admitted to the hospital. This includes a comprehensive evaluation, diagnosis, treatment plan, and monitoring of your health condition. It ensures your well-being during your hospital stay.
51 services50 patients
Established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more 99214
This is a routine check-up for patients who have previously visited our clinic. It involves a comprehensive review of your health and any ongoing treatments. The consultation lasts between 30-39 minutes, allowing enough time to discuss any concerns.
43 services33 patients
Subsequent hospital care with moderate levelof medical decision making, if using time, at least 50 minutes 99233
Follow-up hospital inpatient care per day typically involves a 35-minute check-up by your healthcare provider. This service includes monitoring your health progress, adjusting your treatment plan if needed, and answering any questions you may have about your condition or care.
40 services16 patients
Established patient office or other outpatient visit with low level od decision making, if using time, 20 minutes or more 99213
This is a routine visit for patients who have already been seen by the healthcare provider. During this approximately 20-29 minute appointment, your health status will be evaluated and any necessary treatments or tests will be discussed. It's a chance to address any health concerns you may have.
13 services13 patients

Hospital Affiliations CMS Care Compare 2

Hospitals where this provider delivers care, identified from recent Medicare claims and place-of-service records.

Elkhart General Hospital

Acute Care Hospitals · Elkhart, IN
4/5 CMS rating
OwnershipGovernment - Local
CMS Certification Number150018
Location600 E BlvdElkhart, IN 46514 · Elkhart County
Emergency services Birthing friendly

Memorial Hospital Of South Bend

Acute Care Hospitals · South Bend, IN
3/5 CMS rating
OwnershipVoluntary non-profit - Private
CMS Certification Number150058
Location615 N Michigan StSouth Bend, IN 46601 · St. Joseph County
Emergency services Birthing friendly

Physician Visit Costs CMS claims · ZIP area

Typical Medicare office-visit costs in the 46601 ZIP code area, from fee-for-service claims. These are area statistics, not this provider’s prices; actual charges vary by service and coverage.

New Patient
$122.49 typical visit price
range $53.07 – $161.76
Typical copayment $30.62 (range $13.26 – $40.44)
Most-billed visit code 99204
Established Patient
$94.22 typical visit price
range $16.93 – $132.22
Typical copayment $23.55 (range $4.23 – $33.05)
Most-billed visit code 99214
Amounts reflect what Medicare beneficiaries in this ZIP area are typically charged for office visits. Patients with other coverage should check their individual plans.

Other Providers at the Same Location NPPES 2

Providers registered at the same practice address, or within the immediate area, according to the NPPES registry.

HEIDI A COLLINS MD
Physical Medicine & Rehabilitation
621 MEMORIAL DR STE 624
SOUTH BEND, IN 46601
St. Joseph County (574) 647-8177
DR. KEVIN FRANCIS CUMPER M.D.
Internal Medicine (Infectious Disease)
621 MEMORIAL DR STE 624
SOUTH BEND, IN 46601
St. Joseph County (574) 647-8177

Frequently Asked Questions NPPES & CMS

Common questions about this NPI record, answered from the official NPPES registry and CMS datasets shown on this page.

What is Chiedu Onunkwo's NPI number?

The NPI number for Chiedu Onunkwo is 1992752018. It was assigned to this individual provider in the NPPES registry on May 27, 2006.

Where is Chiedu Onunkwo located?

Chiedu Onunkwo practices at 621 Memorial Dr Ste 624, South Bend, IN 46601. The listed phone number is (574) 647-8177.

What is Chiedu Onunkwo's specialty?

The primary specialty registered for this NPI is Internal Medicine, specializing in Infectious Disease, with taxonomy code 207RI0200X.

Is Chiedu Onunkwo enrolled in Medicare?

Yes. Chiedu Onunkwo is registered in the Medicare PECOS system and accepts Medicare assignment, which means accepting the Medicare-approved amount as payment in full for covered services.

Which organizations bill Medicare for Chiedu Onunkwo's services?

According to the CMS Revalidation Reassignment List (October 2026 release), Chiedu Onunkwo reassigns Medicare benefits to 2 organizations: Memorial Health System, Inc. (South Bend, IN) and City Of Hope Medical Group Of Georgia LLC (Newnan, GA). Each reassignment is filed with Medicare on form CMS-855R, signed by both the clinician and the organization, and lets the organization bill Medicare and receive payment for Chiedu Onunkwo's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.

What insurance does Chiedu Onunkwo accept?

Health plans from Ambetter Health, Ambetter from Buckeye Health Plan, Ambetter from Meridian and CareSource list Chiedu Onunkwo as in-network in at least one marketplace plan. Coverage varies by plan and year; verify with the insurer or the provider before a visit.

Is Chiedu Onunkwo affiliated with any hospitals?

According to CMS data, Chiedu Onunkwo is affiliated with Elkhart General Hospital and Memorial Hospital Of South Bend.

When was this NPI record last updated?

The NPPES record for Chiedu Onunkwo was last updated on January 4, 2023. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 3 years ago. If this record has changed at CMS more recently, you can request an on-demand re-check against the live CMS registry, directly from this page.