Walter Anazonwu, MD
Internal Medicine Physician · Saint Louis, MO
Walter Anazonwu, MD is an internal medicine physician with a practice address in Saint Louis, Missouri, and NPI 1316511223, issued on May 15, 2021. Check the license (Missouri 2019034757, as entered in NPPES) on the Missouri Board of Registration for the Healing Arts; the Medicare figures below come from public CMS files.
- Name
- Walter Anazonwu
- Credential
- MD
- Primary taxonomy
- Internal Medicine Physician 207R00000X
- License number
- 2019034757 MO
Self-reported in NPPES; status is on the state search - Practice location
- 916 Olive St, Saint Louis, MO 63101
- Phone
- (314) 436-9300
- Enumerated
- May 15, 2021
- Record last updated
- May 15, 2021 (not updated in 5 years: call before relying on the address or phone)
- Medicare enrollment
- Enrolled (PECOS I20251107004496); accepts Medicare assignment
- Entity
- Type 1 · individual
8 nearest internal medicine physician records → All 2,604 in Missouri → Look up another NPI →
Also registered at 916 Olive St
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Sybille Prustane Guemghe Talla, MDInternal Medicine Physician1497358030
- Max Huang, MDInternal Medicine Physician1427515907
- Jerry Locheke, MDInternal Medicine Physician1295209195
- Faviola Marin, AGPCNPAdult Health Nurse Practitioner1598136350
- Shubhra Mathur, MDFamily Medicine Physician1902519374
- Tyler MillerNurse Practitioner1417357419
Verify Walter Anazonwu 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 2019034757Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
92% fewer Medicare Part D claims than the average internal medicine physician in 2024
254 Medicare Part D claims for 42 beneficiaries, against an average of 3,176 among the 108,855 providers of this specialty who prescribed in Part D.
Most prescribed
- Albuterol Sulfate Hfa23 claims
- Atorvastatin Calcium22 claims
- Amlodipine Besylate21 claims
- Losartan Potassium20 claims
- Fluticasone Propionate12 claims
- Gabapentin11 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
- Permanente Medical Group IncModesto, CA
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Walter Anazonwu among 2,604 internal medicine physician records in Missouri
Walter Anazonwu, 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 2021, is newer than 79% of them.
- NPI issued2021 · 79% of these records are older, 17% newer
- In a Medicare fileYes · 77% of these records are
- In the CMS Doctors and Clinicians fileYes · 55% of these records are
- Graduated2017 · 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).
941 internal medicine physician records list a practice address in Saint Louis
They are 941 of the 27,605 NPPES records with a practice address in Saint Louis, and 2,604 internal medicine physician records in Missouri.
All 2,604 in Missouri → Every provider in Saint Louis → Internal Medicine Physician nationwide →
The 8 internal medicine physician records with the nearest ZIP codes
- Sybille Prustane Guemghe Talla, MDSaint Louis, MO 631011497358030
- Max Huang, MDSaint Louis, MO 631011427515907
- Jerry Locheke, MDSaint Louis, MO 631011295209195
- Henna Sawhney, MDSaint Louis, MO 631011629651963
- Rama Bandi, M.D.Saint Louis, MO 631031245441450
- Gary Ratkin, MDSt Louis, MO 631031881607430
- Anuradha Kotha, M.D.Saint Louis, MO 631041437174455
- Ernesto Lam, M.D.Saint Louis, MO 631041790875615
Common questions
What is Walter Anazonwu, MD's NPI number?
Walter Anazonwu, MD's National Provider Identifier (NPI) is 1316511223, issued on May 15, 2021. An NPI identifies a provider in billing; it is not a license.
Where is Walter Anazonwu, MD located?
The NPPES record lists a practice address at 916 Olive St, Saint Louis, MO, 63101. Phone: (314) 436-9300. Providers update this record themselves, so call before visiting.
How can I verify Walter Anazonwu, MD's license?
NPPES lists Missouri license number 2019034757, 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 Walter Anazonwu, MD prescribe under Medicare Part D?
In 2024, Walter Anazonwu, MD had 254 Medicare Part D claims for 42 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.