Ronald Jeffrey McCowan, M.D.
Hospice and Palliative Medicine (Internal Medicine) Physician · Moreno Valley, CA
Ronald Jeffrey McCowan, M.D. is a hospice and palliative medicine (internal medicine) physician with a practice address in Moreno Valley, California, and NPI 1801937313, issued on Feb 8, 2007. Check the license (California G47273, as entered in NPPES) on the Medical Board of California; the Medicare figures below come from public CMS files.
- Name
- Ronald Jeffrey McCowan
- Credential
- M.D.
- Primary taxonomy
- Hospice and Palliative Medicine (Internal Medicine) Physician 207RH0002X
- License numbers
- G47273 CA
15907 WV
Self-reported in NPPES; status is on the state search - Practice location
- 26520 Cactus Ave, Moreno Valley, CA 92555
- Phone
- (951) 486-4000
- Enumerated
- Feb 8, 2007
- Record last updated
- Oct 3, 2017 (not updated in 9 years: call before relying on the address or phone)
- Medicare enrollment
- Enrolled (PECOS I20171012000968); accepts Medicare assignment
- Medical or professional school
- Loma Linda University School Of Medicine, 1980
- Entity
- Type 1 · individual
8 nearest hospice and palliative medicine (internal medicine) physician records → All 260 in California → Look up another NPI →
Also registered at 26520 Cactus Ave
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Ihab Abed, MDStudent in an Organized Health Care Education/Training Program1912830514
- Mohamed Abu-Qaoud, M.D.Internal Medicine Physician1366635534
- Barbara Ackerman, PH.D.Clinical Psychologist1639126410
- Sana Afroz, MDRheumatology Physician1356724074
- Georgina Aguilar-Portillo, MDFamily Medicine Physician1144804691
- Adolfo Aguilera, MDFamily Medicine Physician1477609808
Verify Ronald Jeffrey McCowan in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMedical Board of California
Search for license G47273Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
80% fewer Medicare Part D claims than the average hospice and palliative medicine (internal medicine) physician in 2024
151 Medicare Part D claims for 22 beneficiaries, against an average of 741 among the 1,607 providers of this specialty who prescribed in Part D. Brand-name drugs were 11% of claims. 86 claims were for opioids.
Most prescribed
- Hydrocodone-Acetaminophen40 claims
- Oxycodone-Acetaminophen20 claims
- Gabapentin16 claims
- Duloxetine Hcl14 claims
- Morphine Sulfate Er13 claims
- Oxycontin11 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): 85.5 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).
Bills Medicare through one group practice
- Riverside Faculty Medical Group IncMoreno Valley, CA
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Ronald Jeffrey McCowan among 260 hospice and palliative medicine (internal medicine) physician records in California
Ronald Jeffrey McCowan, M.D. is one of 260 hospice and palliative medicine (internal medicine) physician records with a practice address in California. 87% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2007, is newer than 25% of them.
- NPI issued2007 · 25% of these records are older, 63% newer
- In a Medicare fileYes · 87% of these records are
- In the CMS Doctors and Clinicians fileYes · 74% of these records are
- Graduated1980 · median 2010 among the 193 with a school on file
- Record last updated2017 · 38% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 207RH0002X and a California practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
Hospice and Palliative Medicine (Internal Medicine) Physician providers in California
There are 260 hospice and palliative medicine (internal medicine) physician records in California.
All 260 in California → Every provider in Moreno Valley → Hospice and Palliative Medicine (Internal Medicine) Physician nationwide →
The 8 hospice and palliative medicine (internal medicine) physician records with the nearest ZIP codes
- Stephen Ryder, M.D.Murrieta, CA 925621134221120
- Kaishauna Guidry, MD, HMDCMurrieta, CA 925631659726206
- Mohmedali Patel, M. D.Lake Elsinore, CA 925301548486756
- Robert Nguyen, M.D., M.P.H.Irvine, CA 926021255717823
- Jamie Fertal, D.O.Irvine, CA 926181447456769
- Linda Hillebrand, DOIrvine, CA 926181336183243
- Babak Jamasian MobarakehIrvine, CA 926181396270112
- Richard Lee, MDIrvine, CA 926181255503850
Common questions
What is Ronald Jeffrey McCowan, M.D.'s NPI number?
Ronald Jeffrey McCowan, M.D.'s National Provider Identifier (NPI) is 1801937313, issued on Feb 8, 2007. An NPI identifies a provider in billing; it is not a license.
Where is Ronald Jeffrey McCowan, M.D. located?
The NPPES record lists a practice address at 26520 Cactus Ave, Moreno Valley, CA, 92555. Phone: (951) 486-4000. Providers update this record themselves, so call before visiting.
How can I verify Ronald Jeffrey McCowan, M.D.'s license?
NPPES lists California license number G47273, 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 Ronald Jeffrey McCowan, M.D. prescribe under Medicare Part D?
In 2024, Ronald Jeffrey McCowan, M.D. had 151 Medicare Part D claims for 22 beneficiaries; the average among hospice and palliative medicine (internal medicine) physician prescribers was 741. Part D covers Medicare prescriptions only.
What is Ronald Jeffrey McCowan, M.D.'s MIPS final score?
The 2023 MIPS final score is 85.5 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.