Mark David Allison, M.D.
Internal Medicine Physician · Riverside, CA
Mark David Allison, M.D. is an internal medicine physician with a practice address in Riverside, California, and NPI 1164471223, issued on May 8, 2006. Check the license (California C50568, as entered in NPPES) on the Medical Board of California; the Medicare figures below come from public CMS files.
- Name
- Mark David Allison
- Credential
- M.D.
- Primary taxonomy
- Internal Medicine Physician 207R00000X
- License number
- C50568 CA
Self-reported in NPPES; status is on the state search - Practice location
- 4100 Central Ave, Riverside, CA 92506
- Phone
- (951) 788-8332
- Enumerated
- May 8, 2006
- Record last updated
- Oct 7, 2014 (not updated in 12 years: call before relying on the address or phone)
- Fax
- (951) 788-6380
- Entity
- Type 1 · individual
8 nearest internal medicine physician records → All 17,696 in California → Look up another NPI →
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Verify Mark David Allison in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMedical Board of California
Search for license C50568Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
100% fewer Medicare Part D claims than the average internal medicine physician in 2024
12 Medicare Part D claims, against an average of 3,176 among the 108,855 providers of this specialty who prescribed in Part D.
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.
Mark David Allison among 17,696 internal medicine physician records in California
Mark David Allison, M.D. is one of 17,696 internal medicine physician records with a practice address in California. 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 2006, is newer than 5% of them.
- NPI issued2006 · 5% of these records are older, 56% newer
- In a Medicare fileYes · 79% of these records are
- In the CMS Doctors and Clinicians fileNo · 63% of these records are
- Record last updated2014 · 61% 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 California practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
187 internal medicine physician records list a practice address in Riverside
They are 187 of the 13,893 NPPES records with a practice address in Riverside, and 17,696 internal medicine physician records in California.
All 17,696 in California → Every provider in Riverside → Internal Medicine Physician nationwide →
The 8 internal medicine physician records with the nearest ZIP codes
- Sarah Chae, MDRiverside, CA 925061003872169
- Stephen Colucci, MDRiverside, CA 925061245211614
- Andrew Corr, MDRiverside, CA 925061619958089
- Melanie Crane, MDRiverside, CA 925061083695456
- Leah Hopkins, MDRiverside, CA 925061548239932
- Tony Kwon, MDRiverside, CA 925061164404729
- Catherine Larson, MDRiverside, CA 925061255313060
- Sarah Lavery, MDRiverside, CA 925061417990383
Common questions
What is Mark David Allison, M.D.'s NPI number?
Mark David Allison, M.D.'s National Provider Identifier (NPI) is 1164471223, issued on May 8, 2006. An NPI identifies a provider in billing; it is not a license.
Where is Mark David Allison, M.D. located?
The NPPES record lists a practice address at 4100 Central Ave, Riverside, CA, 92506. Phone: (951) 788-8332. Providers update this record themselves, so call before visiting.
How can I verify Mark David Allison, M.D.'s license?
NPPES lists California license number C50568, as entered by the provider. Search the Medical Board of California at https://www.mbc.ca.gov/License-Verification/default.aspx. The NPPES record confirms identity only; the state search shows license status, expiration and public orders.
How much does Mark David Allison, M.D. prescribe under Medicare Part D?
In 2024, Mark David Allison, M.D. had 12 Medicare Part D claims; 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.