Jacob Nathaniel Mattox, MD
Emergency Medicine Physician · Oak Lawn, IL
Jacob Nathaniel Mattox, MD is an emergency medicine physician with a practice address in Oak Lawn, Illinois, and NPI 1922636893, issued on Mar 27, 2020. Check the license (Illinois 125.075832, as entered in NPPES) on the Illinois Department of Financial and Professional Regulation; the Medicare figures below come from public CMS files.
- Name
- Jacob Nathaniel Mattox
- Credential
- MD
- Primary taxonomy
- Emergency Medicine Physician 207P00000X
- License number
- 125.075832 IL
Self-reported in NPPES; status is on the state search - Practice location
- 4440 W 95TH St, Oak Lawn, IL 60453
- Phone
- (708) 684-8000
- Enumerated
- Mar 27, 2020
- Record last updated
- Jun 17, 2020 (not updated in 6 years: call before relying on the address or phone)
- Medicare enrollment
- Enrolled (PECOS I20230109002757); accepts Medicare assignment
- Medical or professional school
- University Of Southern California Keck School Of Medicine, 2020
- Entity
- Type 1 · individual
8 nearest emergency medicine physician records → All 3,291 in Illinois → Look up another NPI →
Also registered at 4440 W 95TH St
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Nadia Abdessalam, FNP-BCFamily Nurse Practitioner1356888283
- Akram Abdoue, M.D.Anesthesiology Physician1992752489
- Ahmad Abdulla, MDEmergency Medicine Physician1467202556
- Joseph Abraham, CRNACertified Registered Nurse Anesthetist1831653401
- Katherine Absalon, MOT, OTR/LOccupational Therapist1457753436
- Tassneem Abu-Rezeq, DNP, APRN, CPNP-ACPediatric Nurse Practitioner1831904663
Verify Jacob Nathaniel Mattox 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 125.075832Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
37% fewer Medicare Part D claims than the average emergency medicine physician in 2024
142 Medicare Part D claims for 106 beneficiaries, against an average of 226 among the 54,106 providers of this specialty who prescribed in Part D. Brand-name drugs were 10% of claims. 13 claims were for opioids.
Most prescribed
- Cephalexin30 claims
- Hydrocodone-Acetaminophen13 claims
- Doxycycline Monohydrate12 claims
- Prednisone12 claims
- Amoxicillin-Clavulanate Potass11 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.
Bills Medicare through one group practice
- Clarksville Emergency Group PCMichigan City, IN
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Jacob Nathaniel Mattox among 3,291 emergency medicine physician records in Illinois
Jacob Nathaniel Mattox, MD is one of 3,291 emergency medicine physician records with a practice address in Illinois. 80% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2020, is newer than 78% of them.
- NPI issued2020 · 78% of these records are older, 18% newer
- In a Medicare fileYes · 80% of these records are
- In the CMS Doctors and Clinicians fileYes · 57% of these records are
- Graduated2020 · median 2012 among the 1,867 with a school on file
- Record last updated2020 · 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 207P00000X and a Illinois practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
163 emergency medicine physician records list a practice address in Oak Lawn
They are 163 of the 2,993 NPPES records with a practice address in Oak Lawn, and 3,291 emergency medicine physician records in Illinois.
All 3,291 in Illinois → Every provider in Oak Lawn → Emergency Medicine Physician nationwide →
The 8 emergency medicine physician records with the nearest ZIP codes
- R. Altman, M.D.Oak Lawn, IL 604531285640862
- Adele Cobbs, M.D.Oak Lawn, IL 604531295750669
- Steve Delis, MDOak Lawn, IL 604531720095920
- Mila Felder, M.D., M.S.Oak Lawn, IL 604531265440929
- Shayla Garrett-Hauser, MDOak Lawn, IL 604531457368896
- Robert Harwood, M.D.Oak Lawn, IL 604531194733220
- Abhishek Katiyar, M.D.Oak Lawn, IL 604531346219565
- Anna Kiernicki Sklar, MDOak Lawn, IL 604531467447920
Common questions
What is Jacob Nathaniel Mattox, MD's NPI number?
Jacob Nathaniel Mattox, MD's National Provider Identifier (NPI) is 1922636893, issued on Mar 27, 2020. An NPI identifies a provider in billing; it is not a license.
Where is Jacob Nathaniel Mattox, MD located?
The NPPES record lists a practice address at 4440 W 95TH St, Oak Lawn, IL, 60453. Phone: (708) 684-8000. Providers update this record themselves, so call before visiting.
How can I verify Jacob Nathaniel Mattox, MD's license?
NPPES lists Illinois license number 125.075832, 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 Jacob Nathaniel Mattox, MD prescribe under Medicare Part D?
In 2024, Jacob Nathaniel Mattox, MD had 142 Medicare Part D claims for 106 beneficiaries; the average among emergency medicine physician prescribers was 226. 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.