Matthew R. Williams, MD
Internal Medicine Physician · Springfield, MO
Matthew R. Williams, MD is an internal medicine physician with a practice address in Springfield, Missouri, and NPI 1184121998, issued on Apr 9, 2018. Check the license (Missouri 2021025620, as entered in NPPES) on the Missouri Board of Registration for the Healing Arts; the Medicare figures below come from public CMS files.
- Name
- Matthew R. Williams
- Credential
- MD
- Primary taxonomy
- Internal Medicine Physician 207R00000X
- License number
- 2021025620 MO
Self-reported in NPPES; status is on the state search - Practice location
- 3231 S National Ave Ste 300, Springfield, MO 65807
- Phone
- (417) 888-5658
- Enumerated
- Apr 9, 2018
- Record last updated
- Jul 29, 2021 (not updated in 5 years: call before relying on the address or phone)
- Medicare enrollment
- Enrolled (PECOS I20210730001695); accepts Medicare assignment
- Telehealth
- Offers telehealth (CMS)
- Entity
- Type 1 · individual
8 nearest internal medicine physician records → All 2,604 in Missouri → Look up another NPI →
Also registered at 3231 S National Ave Ste 300
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Brendan Earley, PHARMDPharmacist1558256487
- Ashley Evans, PHARMD, BCACPAmbulatory Care Pharmacist1316461254
- Stephanie Fox, PAPhysician Assistant1487617742
- Emily Humphrey, PHARMDPharmacist Clinician (PhC)/ Clinical Pharmacy Specialist1144892019
- Patricia McCallister, NPFamily Nurse Practitioner1093280935
- Leah Peppard, PAPhysician Assistant1679272355
Verify Matthew R. Williams in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMissouri Board of Registration for the Healing Arts
Search for license 2021025620Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
5.1 times the Medicare Part D claims of the average internal medicine physician in 2024
16,189 Medicare Part D claims for 1,238 beneficiaries, against an average of 3,176 among the 108,855 providers of this specialty who prescribed in Part D. Brand-name drugs were 13% of claims. 747 claims were for opioids.
Most prescribed
- Atorvastatin Calcium925 claims
- Levothyroxine Sodium533 claims
- Lisinopril528 claims
- Amlodipine Besylate511 claims
- Trazodone Hcl433 claims
- Pantoprazole Sodium390 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.
Industry payments in 2024: $157.99
4 payments; by number, the most common kind was food and beverage; the largest payer was Janssen Pharmaceuticals, 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 one group practice
- Mercy Clinic Springfield CommunitiesSpringfield, MO
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Matthew R. Williams among 2,604 internal medicine physician records in Missouri
Matthew R. Williams, MD is one of 2,604 internal medicine physician records with a practice address in Missouri. 77% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2018, is newer than 69% of them.
- NPI issued2018 · 69% of these records are older, 28% newer
- In a Medicare fileYes · 77% of these records are
- In the CMS Doctors and Clinicians fileYes · 55% of these records are
- Graduated2018 · median 2006 among the 1,443 with a school on file
- Record last updated2021 · 48% 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 Missouri practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
135 internal medicine physician records list a practice address in Springfield
They are 135 of the 6,403 NPPES records with a practice address in Springfield, and 2,604 internal medicine physician records in Missouri.
All 2,604 in Missouri → Every provider in Springfield → Internal Medicine Physician nationwide →
The 8 internal medicine physician records with the nearest ZIP codes
- William Baird, DOSpringfield, MO 658071194798512
- Gigi Baker, MDSpringfield, MO 658071184666117
- John Caster, MDSpringfield, MO 658071902849854
- John Dexter, MDSpringfield, MO 658071205805538
- Stephen Holmes, MDSpringfield, MO 658071831132240
- Frederick Lobati, M.D.Springfield, MO 658071306823273
- William Moore, MDSpringfield, MO 658071700829819
- Lisa Pham, M.D.Springfield, MO 658071275502379
Common questions
What is Matthew R. Williams, MD's NPI number?
Matthew R. Williams, MD's National Provider Identifier (NPI) is 1184121998, issued on Apr 9, 2018. An NPI identifies a provider in billing; it is not a license.
Where is Matthew R. Williams, MD located?
The NPPES record lists a practice address at 3231 S National Ave Ste 300, Springfield, MO, 65807. Phone: (417) 888-5658. Providers update this record themselves, so call before visiting.
How can I verify Matthew R. Williams, MD's license?
NPPES lists Missouri license number 2021025620, as entered by the provider. Search the Missouri Board of Registration for the Healing Arts at https://www.fsmb.org/contact-a-state-medical-board/. The NPPES record confirms identity only; the state search shows license status, expiration and public orders.
How much does Matthew R. Williams, MD prescribe under Medicare Part D?
In 2024, Matthew R. Williams, MD had 16,189 Medicare Part D claims for 1,238 beneficiaries; the average among internal medicine physician prescribers was 3,176. 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.