Mal S. Riddell, D.O.
Family Medicine Physician · Grenada, MS
Mal S. Riddell, D.O. is a family medicine physician with a practice address in Grenada, Mississippi, and NPI 1083613210, issued on Jul 19, 2005. Check the license (Mississippi 08590, as entered in NPPES) on the Mississippi State Board of Medical Licensure; the Medicare figures below come from public CMS files.
- Name
- Mal S. Riddell
- Credential
- D.O.
- Primary taxonomy
- Family Medicine Physician 207Q00000X
- License number
- 08590 MS
Self-reported in NPPES; status is on the state search - Practice location
- 1300 Sunset Dr, Grenada, MS 38901
- Phone
- (662) 226-6430
- Enumerated
- Jul 19, 2005
- Record last updated
- Jan 6, 2017 (not updated in 9 years: call before relying on the address or phone)
- Fax
- (662) 226-0018
- Medicaid ID
- 00018828 MS
- Entity
- Type 1 · individual
8 nearest family medicine physician records → All 1,165 in Mississippi → Look up another NPI →
Also registered at 1300 Sunset Dr
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Kathy AllenHearing Instrument Specialist1700983855
- Kathy Armstrong, O.T.Occupational Therapist1356459101
- Ralph Armstrong, M.D.Family Medicine Physician1417975731
- Latia Butts, CFNPNurse Practitioner1164731931
- Ralph Cain, FNPFamily Nurse Practitioner1245462282
- Blenda Chambley, FNPFamily Nurse Practitioner1922029131
Verify Mal S. Riddell in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMississippi State Board of Medical Licensure
Search for license 08590Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
83% fewer Medicare Part D claims than the average family medicine physician in 2024
603 Medicare Part D claims for 201 beneficiaries, against an average of 3,544 among the 117,163 providers of this specialty who prescribed in Part D. Brand-name drugs were 9% of claims.
Most prescribed
- Atorvastatin Calcium34 claims
- Omeprazole30 claims
- Amlodipine Besylate24 claims
- Lisinopril-Hydrochlorothiazide19 claims
- Losartan Potassium18 claims
- Lisinopril15 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.
The practice group's MIPS final score for 2023 (Medicare payment program): 69.8 of 100
The Merit-based Incentive Payment System score is reported for the practice group, not for one clinician alone. Four categories are weighted into the final score; the average among 454,083 clinicians with a measured score was 83.5.
Source: CMS Quality Payment Program, MIPS performance year 2023, group reporting; category weights for 2023 (qpp.cms.gov).
Mal S. Riddell among 1,165 family medicine physician records in Mississippi
Mal S. Riddell, D.O. is one of 1,165 family medicine physician records with a practice address in Mississippi. 79% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2005, is newer than 0% of them.
- NPI issued2005 · 0% of these records are older, 91% newer
- In a Medicare fileYes · 79% of these records are
- In the CMS Doctors and Clinicians fileNo · 64% of these records are
- Record last updated2017 · 60% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 207Q00000X and a Mississippi practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
8 family medicine physician records list a practice address in Grenada
They are 8 of the 182 NPPES records with a practice address in Grenada, and 1,165 family medicine physician records in Mississippi.
All 1,165 in Mississippi → Every provider in Grenada → Family Medicine Physician nationwide →
The 8 family medicine physician records with the nearest ZIP codes
- Ralph Armstrong, M.D.Grenada, MS 389011417975731
- Audrey BaileyGrenada, MS 389011053088922
- Mary Frank-Tarsi, M.D.Grenada, MS 389011558305722
- Benjamin Lambert, MDGrenada, MS 389011982198503
- Kerry Lee, M.D.Grenada, MS 389011467470799
- Richard Reid, M.D.Grenada, MS 389011528086857
- James Stanford, M.D.Grenada, MS 389011033220512
- Tom Longest, MDBruce, MS 389151851477079
Common questions
What is Mal S. Riddell, D.O.'s NPI number?
Mal S. Riddell, D.O.'s National Provider Identifier (NPI) is 1083613210, issued on Jul 19, 2005. An NPI identifies a provider in billing; it is not a license.
Where is Mal S. Riddell, D.O. located?
The NPPES record lists a practice address at 1300 Sunset Dr, Grenada, MS, 38901. Phone: (662) 226-6430. Providers update this record themselves, so call before visiting.
How can I verify Mal S. Riddell, D.O.'s license?
NPPES lists Mississippi license number 08590, as entered by the provider. Search the Mississippi State Board of Medical Licensure at https://www.msbml.ms.gov/. The NPPES record confirms identity only; the state search shows license status, expiration and public orders.
How much does Mal S. Riddell, D.O. prescribe under Medicare Part D?
In 2024, Mal S. Riddell, D.O. had 603 Medicare Part D claims for 201 beneficiaries; the average among family medicine physician prescribers was 3,544. Part D covers Medicare prescriptions only.
What is Mal S. Riddell, D.O.'s MIPS final score?
The 2023 MIPS final score is 69.8 of 100, reported for the practice group. The average among 454,083 clinicians with a measured score was 83.5.
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.