Mark A. Ashley, MD
Family Medicine Physician · Riverside, CA
Mark A. Ashley, MD is a family medicine physician with a practice address in Riverside, California, and NPI 1083773741, issued on Dec 8, 2006. Check the license (California A77477, as entered in NPPES) on the Medical Board of California; the Medicare figures below come from public CMS files.
- Name
- Mark A. Ashley
- Credential
- MD
- Primary taxonomy
- Family Medicine Physician 207Q00000X
- License number
- A77477 CA
Self-reported in NPPES; status is on the state search - Practice location
- 10800 Magnolia Ave, Riverside, CA 92505
- Phone
- (909) 353-2000
- Enumerated
- Dec 8, 2006
- Record last updated
- Nov 30, 2021 (not updated in 5 years: call before relying on the address or phone)
- Medicare enrollment
- Enrolled (PECOS I20040226001228); accepts Medicare assignment
- Medical or professional school
- Loma Linda University School Of Medicine, 2000
- Entity
- Type 1 · individual
8 nearest family medicine physician records → All 17,133 in California → Look up another NPI →
Also registered at 10800 Magnolia Ave
A shared address usually means a shared clinic or building; it does not show who employs whom.
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Verify Mark A. Ashley in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMedical Board of California
Search for license A77477Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
91% fewer Medicare Part D claims than the average family medicine physician in 2024
306 Medicare Part D claims for 234 beneficiaries, against an average of 3,544 among the 117,163 providers of this specialty who prescribed in Part D. Brand-name drugs were 5% of claims. 24 claims were for opioids.
Most prescribed
- Prednisone41 claims
- Meloxicam25 claims
- Cephalexin21 claims
- Amoxicillin-Clavulanate Potass18 claims
- Tramadol Hcl18 claims
- Cefadroxil15 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
- Southern California Permanente Medical GroupRiverside, CA
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Mark A. Ashley among 17,133 family medicine physician records in California
Mark A. Ashley, MD is one of 17,133 family medicine physician records with a practice address in California. 81% 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 6% of them.
- NPI issued2006 · 6% of these records are older, 59% newer
- In a Medicare fileYes · 81% of these records are
- In the CMS Doctors and Clinicians fileYes · 62% of these records are
- Graduated2000 · median 2005 among the 10,652 with a school on file
- Record last updated2021 · 58% 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 California practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
258 family medicine physician records list a practice address in Riverside
They are 258 of the 13,893 NPPES records with a practice address in Riverside, and 17,133 family medicine physician records in California.
All 17,133 in California → Every provider in Riverside → Family Medicine Physician nationwide →
The 8 family medicine physician records with the nearest ZIP codes
- Francis Chu, MDRiverside, CA 925051225105166
- Vanessa Ho, MDRiverside, CA 925051679512776
- Judith Holmes, MDRiverside, CA 925051740357615
- Paul Hsiang, MDRiverside, CA 925051841367679
- Emanuel Kristianto, MDRiverside, CA 925051063589075
- Richard Liu, MDRiverside, CA 925051396812277
- Michele Martinez, MD.Riverside, CA 925051205939204
- Karen McBride, MDRiverside, CA 925051841378395
Common questions
What is Mark A. Ashley, MD's NPI number?
Mark A. Ashley, MD's National Provider Identifier (NPI) is 1083773741, issued on Dec 8, 2006. An NPI identifies a provider in billing; it is not a license.
Where is Mark A. Ashley, MD located?
The NPPES record lists a practice address at 10800 Magnolia Ave, Riverside, CA, 92505. Phone: (909) 353-2000. Providers update this record themselves, so call before visiting.
How can I verify Mark A. Ashley, MD's license?
NPPES lists California license number A77477, 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 A. Ashley, MD prescribe under Medicare Part D?
In 2024, Mark A. Ashley, MD had 306 Medicare Part D claims for 234 beneficiaries; the average among family medicine physician prescribers was 3,544. 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.