Michael Mostyn, M.D.
Internal Medicine Physician · Palm Desert, CA
Michael Mostyn, M.D. is an internal medicine physician with a practice address in Palm Desert, California, and NPI 1235166059, issued on Jun 27, 2006. Check the license on the Medical Board of California; the Medicare figures below come from public CMS files.
- Name
- Michael Mostyn
- Credential
- M.D.
- Primary taxonomy
- Internal Medicine Physician 207R00000X
- Practice location
- 74990 Country Club Dr, Palm Desert, CA 92260
- Phone
- (760) 341-8800
- Enumerated
- Jun 27, 2006
- Entity
- Type 1 · individual
Also registered at 74990 Country Club Dr
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Steven Fountain, MDOrthopaedic Surgery Physician1144472010
- Thomas McMillan, M.D.Emergency Medicine Physician1508893322
- Marion Windham, M.D.General Practice Physician1144214636
Verify Michael Mostyn in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMedical Board of CaliforniaCheck the board
- 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS, AOA, NCCPA, AANPNot checked
66% fewer Medicare Part D claims than the average internal medicine physician in 2024
955 Medicare Part D claims for 182 beneficiaries, against an average of 2,785 among the 127,794 providers of this specialty who prescribed in Part D. Brand-name drugs were 15% of claims.
Most prescribed
- Atorvastatin Calcium75 claims
- Amlodipine Besylate52 claims
- Lisinopril52 claims
- Metformin Hcl40 claims
- Levothyroxine Sodium30 claims
- Furosemide24 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.
Industry payments in 2024: $351.92
3 payments, mostly food and beverage; the largest payer was Amgen Inc.. The 65,274 providers of this specialty with any payment received $2,536.66 on average. Payments are reported by manufacturers, not by the provider, and are not a sign of wrongdoing.
Source: CMS Open Payments, program year 2024 (openpaymentsdata.cms.gov); average among providers of this specialty with at least one payment.
2 hospital and facility affiliations
- Coachella Valley Care Medical Associates IncIndio, CA
- Indio Emergency Medical Group IncCoachella, CA
Source: CMS Doctors and Clinicians affiliations; Hospital General Information (Care Compare) (data.cms.gov). Star ratings are CMS hospital ratings, not ratings of this provider.
14 internal medicine physician records list a Palm Desert practice address
They are 14 of the 1,495 NPPES records with a Palm Desert practice address, and 20,403 internal medicine physician records in California.
All 14 in Palm Desert → All 20,403 in California → Every provider in Palm Desert →
Other internal medicine physician records in California
- Jacob Aaron, MDSan Francisco, CA1407202518
- Alistair Aaronson, MDStanford, CA1457628760
- Jose Abad., MDSacramento, CA1144607219
- Donna Abare, MDOakland, CA1386722155
- Marce AbareScotts Valley, CA1457744708
- Samuel Abarte, M.D.Chula Vista, CA1578535498
- Alexander Abary, MDLong Beach, CA1104995919
- Luba Abascal, MDSan Francisco, CA1023180874
- Michael Abate, MDSacramento, CA1548248131
- Wali Abawi, D.O.Joshua Tree, CA1104362268
Common questions
What is Michael Mostyn, M.D.'s NPI number?
Michael Mostyn, M.D.'s National Provider Identifier (NPI) is 1235166059, issued on Jun 27, 2006. An NPI identifies a provider in billing; it is not a license.
Where is Michael Mostyn, M.D. located?
The NPPES record lists a practice address at 74990 Country Club Dr, Palm Desert, CA, 92260. Phone: (760) 341-8800. Providers update this record themselves, so call before visiting.
How can I verify Michael Mostyn, M.D.'s license?
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 Michael Mostyn, M.D. prescribe under Medicare Part D?
In 2024, Michael Mostyn, M.D. had 955 Medicare Part D claims for 182 beneficiaries; the average among internal medicine physician prescribers was 2,785. Part D covers Medicare prescriptions only.
Source: CMS National Plan and Provider Enumeration System (NPPES), loaded Aug 27, 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.
Every figure on PlainDoctor is rendered directly from the federal CMS NPPES registry, Medicare Part D, MIPS, and Open Payments records, no number is typed in by an editor. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error. Data current as of Aug 27, 2026.