Mark William Dailey
Psychiatry Physician · Riverside, CA
Mark William Dailey is a psychiatry physician with a practice address in Riverside, California, and NPI 1063866747, issued on Apr 19, 2016. Check the license (California 20A16017, as entered in NPPES) on the Medical Board of California; the Medicare figures below come from public CMS files.
- Name
- Mark William Dailey
- Primary taxonomy
- Psychiatry Physician 2084P0800X
- License number
- 20A16017 CA
Self-reported in NPPES; status is on the state search - Practice location
- 9990 County Farm RD, Riverside, CA 92503
- Phone
- (951) 486-4000
- Enumerated
- Apr 19, 2016
- Record last updated
- Mar 4, 2026
- Entity
- Type 1 · individual
8 nearest psychiatry physician records → All 8,673 in California → Look up another NPI →
Also registered at 9990 County Farm RD
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Marisa AdamMental Health Counselor1386860906
- Musaab Ali, MDPsychiatry Physician1437618725
- Neville Allen, PEER SUPPORTPeer Specialist1194189001
- Cheryle Anderson, LVNLicensed Practical Nurse1912292327
- Selina Anderson, RNRegistered Nurse1922547124
- Trieste ArringtonPeer Specialist1447613567
Verify Mark William Dailey in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMedical Board of California
Search for license 20A16017Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
93% fewer Medicare Part D claims than the average psychiatry physician in 2024
72 Medicare Part D claims for 18 beneficiaries, against an average of 1,000 among the 35,054 providers of this specialty who prescribed in Part D.
Most prescribed
- Buprenorphine-Naloxone15 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.
Mark William Dailey among 8,673 psychiatry physician records in California
Mark William Dailey is one of 8,673 psychiatry physician records with a practice address in California. 67% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2016, is newer than 77% of them.
- NPI issued2016 · 77% of these records are older, 21% newer
- In a Medicare fileYes · 67% of these records are
- In the CMS Doctors and Clinicians fileNo · 38% of these records are
- Record last updated2026 · 54% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 2084P0800X and a California practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
134 psychiatry physician records list a practice address in Riverside
They are 134 of the 13,893 NPPES records with a practice address in Riverside, and 8,673 psychiatry physician records in California.
All 8,673 in California → Every provider in Riverside → Psychiatry Physician nationwide →
The 8 psychiatry physician records with the nearest ZIP codes
- Thomas Bowlus, MDRiverside, CA 925031154492072
- Ellison Chang, MDRiverside, CA 925031508906181
- Jerry Dennis, M.D.Riverside, CA 925031841344348
- David Dinicola, M.D.Riverside, CA 925031205966082
- Loretta Howitt, MDRiverside, CA 925031972670826
- Neeta Kumari, M.D., MPHRiverside, CA 925031508094830
- Ramesh Patel, M.D.Riverside, CA 925031912044520
- Terry Petersen, M.D.Riverside, CA 925031093873978
Common questions
What is Mark William Dailey's NPI number?
Mark William Dailey's National Provider Identifier (NPI) is 1063866747, issued on Apr 19, 2016. An NPI identifies a provider in billing; it is not a license.
Where is Mark William Dailey located?
The NPPES record lists a practice address at 9990 County Farm RD, Riverside, CA, 92503. Phone: (951) 486-4000. Providers update this record themselves, so call before visiting.
How can I verify Mark William Dailey's license?
NPPES lists California license number 20A16017, 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 William Dailey prescribe under Medicare Part D?
In 2024, Mark William Dailey had 72 Medicare Part D claims for 18 beneficiaries; the average among psychiatry physician prescribers was 1,000. 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.