Richard R. Winkelmann, D.O.
Dermatology Physician · Downey, CA
Richard R. Winkelmann, D.O. is a dermatology physician with a practice address in Downey, California, and NPI 1720427024, issued on Jun 19, 2013. Check the license (California 20A17449, as entered in NPPES) on the Medical Board of California; the Medicare figures below come from public CMS files.
- Name
- Richard R. Winkelmann
- Credential
- D.O.
- Primary taxonomy
- Dermatology Physician 207N00000X
- License numbers
- 20A17449 CA
9393 AZ
DO3071 NV
Self-reported in NPPES; status is on the state search - Practice location
- 11525 Brookshire Ave Ste 300, Downey, CA 90241
- Phone
- (562) 869-4497
- Enumerated
- Jun 19, 2013
- Record last updated
- Feb 24, 2026
- Medicare enrollment
- Enrolled (PECOS I20220221001707); accepts Medicare assignment
- Medical or professional school
- Ohio State University College Of Medicine, 2013
- Entity
- Type 1 · individual
8 nearest dermatology physician records → All 2,083 in California → Look up another NPI →
Also registered at 11525 Brookshire Ave Ste 300
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Karina Toliver, FNP-CFamily Nurse Practitioner1235709684
Verify Richard R. Winkelmann in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMedical Board of California
Search for license 20A17449Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
55% more Medicare Part D claims than the average dermatology physician in 2024
1,236 Medicare Part D claims for 561 beneficiaries, against an average of 797 among the 12,802 providers of this specialty who prescribed in Part D.
Most prescribed
- Cephalexin562 claims
- Mupirocin474 claims
- Minocycline Hcl141 claims
- Gentamicin Sulfate41 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.
No measured MIPS final score for 2023
CMS assigned the neutral MIPS final score of 75 without scoring Quality, Cost, Promoting Interoperability or Improvement Activities. It is an administrative threshold, so PlainDoctor does not compare it with measured clinicians.
Source: CMS Quality Payment Program, MIPS performance year 2023, group reporting; category weights for 2023 (qpp.cms.gov).
Industry payments in 2024: $44.39
2 payments; by number, the most common kind was food and beverage; the largest payer was Lilly USA, LLC. The 10,250 providers of this specialty with any payment received $8,544.61 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.
Bills Medicare through 3 group practices
- Daniel Taheri MD PCMesquite, NV
- LA Laser Center PC A Professional Medical CorporationBullhead City, AZ
- Oakview DermatologyRock Hill, SC
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Richard R. Winkelmann among 2,083 dermatology physician records in California
Richard R. Winkelmann, D.O. is one of 2,083 dermatology physician records with a practice address in California. 83% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2013, is newer than 72% of them.
- NPI issued2013 · 72% of these records are older, 25% newer
- In a Medicare fileYes · 83% of these records are
- In the CMS Doctors and Clinicians fileYes · 70% of these records are
- Graduated2013 · median 2006 among the 1,450 with a school on file
- Record last updated2026 · 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 207N00000X and a California practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
Dermatology Physician providers in California
There are 2,083 dermatology physician records in California.
All 2,083 in California → Every provider in Downey → Dermatology Physician nationwide →
The 8 dermatology physician records with the nearest ZIP codes
- David Arnold, DODowney, CA 902411003311051
- Douglas Blose, M.D.Downey, CA 902411306816657
- Gerard Nat, M.D.Downey, CA 902411912007956
- Evelyn Cheung, MDDowney, CA 902421164797312
- Harrison Lee, MDDowney, CA 902421376093997
- Kim Quach, MDDowney, CA 902421518287895
- Jennifer Sri, M.D.Downey, CA 902421962604850
- Karan Kortlander, N.P.El Segundo, CA 902451174163703
Common questions
What is Richard R. Winkelmann, D.O.'s NPI number?
Richard R. Winkelmann, D.O.'s National Provider Identifier (NPI) is 1720427024, issued on Jun 19, 2013. An NPI identifies a provider in billing; it is not a license.
Where is Richard R. Winkelmann, D.O. located?
The NPPES record lists a practice address at 11525 Brookshire Ave Ste 300, Downey, CA, 90241. Phone: (562) 869-4497. Providers update this record themselves, so call before visiting.
How can I verify Richard R. Winkelmann, D.O.'s license?
NPPES lists California license number 20A17449, 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 Richard R. Winkelmann, D.O. prescribe under Medicare Part D?
In 2024, Richard R. Winkelmann, D.O. had 1,236 Medicare Part D claims for 561 beneficiaries; the average among dermatology physician prescribers was 797. Part D covers Medicare prescriptions only.
What is Richard R. Winkelmann, D.O.'s MIPS final score?
CMS assigned the neutral MIPS final score of 75 for 2023 without scoring any category, so it is not a measured result.
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.