Emmanuel Nnanna Njoku, MD
Internal Medicine Physician · Libertyville, IL
Emmanuel Nnanna Njoku, MD is an internal medicine physician with a practice address in Libertyville, Illinois, and NPI 1689981045, issued on Sep 8, 2010. Check the license (Illinois 036.126619, as entered in NPPES) on the Illinois Department of Financial and Professional Regulation; the Medicare figures below come from public CMS files.
- Name
- Emmanuel Nnanna Njoku
- Credential
- MD
- Primary taxonomy
- Internal Medicine Physician 207R00000X
- License number
- 036.126619 IL
Self-reported in NPPES; status is on the state search - Practice location
- 1880 W Winchester RD, Libertyville, IL 60048
- Phone
- (732) 423-8404
- Enumerated
- Sep 8, 2010
- Record last updated
- May 19, 2016 (not updated in 10 years: call before relying on the address or phone)
- Medicare enrollment
- Enrolled (PECOS I20110527000464); accepts Medicare assignment
- Telehealth
- Offers telehealth (CMS)
- Entity
- Type 1 · individual
8 nearest internal medicine physician records → All 7,238 in Illinois → Look up another NPI →
Also registered at 1880 W Winchester RD
A shared address usually means a shared clinic or building; it does not show who employs whom.
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- Sean Lee, M.D.Gastroenterology Physician1194765248
- Steven Marquardt, MDPain Medicine (Anesthesiology) Physician1972578227
- Geetha Reddy, MDCardiovascular Disease Physician1174545453
Verify Emmanuel Nnanna Njoku in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersIllinois Department of Financial and Professional Regulation
Search for license 036.126619Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
94% fewer Medicare Part D claims than the average internal medicine physician in 2024
184 Medicare Part D claims for 28 beneficiaries, against an average of 3,176 among the 108,855 providers of this specialty who prescribed in Part D. Brand-name drugs were 59% of claims.
Most prescribed
- Biktarvy56 claims
- Vancomycin Hcl15 claims
- Ertapenem13 claims
- Juluca13 claims
- Sulfamethoxazole-Trimethoprim12 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.
No measured MIPS final score for 2023
CMS assigned the neutral MIPS final score of 75 without scoring Quality, Cost, Promoting Interoperability or Improvement Activities. It is an administrative threshold, so PlainDoctor does not compare it with measured clinicians.
Source: CMS Quality Payment Program, MIPS performance year 2023, group reporting; category weights for 2023 (qpp.cms.gov).
Industry payments in 2024: $167.54
5 payments; by number, the most common kind was food and beverage; the largest payer was Gilead Sciences, Inc. The 50,334 providers of this specialty with any payment received $1,303.06 on average. Payments are reported by manufacturers, not by the provider, and are not a sign of wrongdoing.
Source: CMS Open Payments, program year 2024 (openpaymentsdata.cms.gov); average among providers of this specialty with at least one payment.
Bills Medicare through 2 group practices
- City OF Hope Medical Group OF Illinois PLLCZion, IL
- Infectious Disease Consultants OF Northern Illinois SCLibertyville, IL
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Emmanuel Nnanna Njoku among 7,238 internal medicine physician records in Illinois
Emmanuel Nnanna Njoku, MD is one of 7,238 internal medicine physician records with a practice address in Illinois. 73% 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 51% of them.
- NPI issued2010 · 51% of these records are older, 47% newer
- In a Medicare fileYes · 73% of these records are
- In the CMS Doctors and Clinicians fileYes · 50% of these records are
- Graduated2002 · median 2003 among the 3,580 with a school on file
- Record last updated2016 · 47% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 207R00000X and a Illinois practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
27 internal medicine physician records list a practice address in Libertyville
They are 27 of the 1,361 NPPES records with a practice address in Libertyville, and 7,238 internal medicine physician records in Illinois.
All 7,238 in Illinois → Every provider in Libertyville → Internal Medicine Physician nationwide →
The 8 internal medicine physician records with the nearest ZIP codes
- Mark Chyna, M.D.Libertyville, IL 600481740273507
- Mohina Gupta, MDLibertyville, IL 600481174578843
- Michael Hall, M.D.Libertyville, IL 600481528053972
- Syeda Iftikhar, M.D.Libertyville, IL 600481770599938
- Allison Klotzbuecher, D.O.Libertyville, IL 600481437170552
- Elliot Miller, MDLibertyville, IL 600481164441572
- Melissa Reeves, MDLibertyville, IL 600481942212311
- Mark Riederman, M.D.Libertyville, IL 600481699782151
Common questions
What is Emmanuel Nnanna Njoku, MD's NPI number?
Emmanuel Nnanna Njoku, MD's National Provider Identifier (NPI) is 1689981045, issued on Sep 8, 2010. An NPI identifies a provider in billing; it is not a license.
Where is Emmanuel Nnanna Njoku, MD located?
The NPPES record lists a practice address at 1880 W Winchester RD, Libertyville, IL, 60048. Phone: (732) 423-8404. Providers update this record themselves, so call before visiting.
How can I verify Emmanuel Nnanna Njoku, MD's license?
NPPES lists Illinois license number 036.126619, as entered by the provider. Search the Illinois Department of Financial and Professional Regulation at https://idfpr.illinois.gov/checklicense.html. The NPPES record confirms identity only; the state search shows license status, expiration and public orders.
How much does Emmanuel Nnanna Njoku, MD prescribe under Medicare Part D?
In 2024, Emmanuel Nnanna Njoku, MD had 184 Medicare Part D claims for 28 beneficiaries; the average among internal medicine physician prescribers was 3,176. Part D covers Medicare prescriptions only.
What is Emmanuel Nnanna Njoku, MD's MIPS final score?
CMS assigned the neutral MIPS final score of 75 for 2023 without scoring any category, so it is not a measured result.
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.