Nicholas Kleen
Physician Assistant · Rancho Santa Margarita, CA
Nicholas Kleen is a physician assistant with a practice address in Rancho Santa Margarita, California, and NPI 1750730651, issued on Jun 10, 2016. Check the license with the California board that licenses this profession; the Medicare figures below come from public CMS files.
- Name
- Nicholas Kleen
- Primary taxonomy
- Physician Assistant 363A00000X
- Practice location
- 34 Calle Maria, Rancho Santa Margarita, CA 92688
- Phone
- (949) 750-6110
- Enumerated
- Jun 10, 2016
- Record last updated
- Jun 10, 2016 (not updated in 10 years: call before relying on the address or phone)
- Medicare enrollment
- Enrolled (PECOS I20170130001729); accepts Medicare assignment
- Telehealth
- Offers telehealth (CMS)
- Entity
- Type 1 · individual
8 nearest physician assistant records → All 14,451 in California → Look up another NPI →
Verify Nicholas Kleen in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersWhich California board licenses this professionCheck the board
- 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
88% fewer Medicare Part D claims than the average physician assistant in 2024
103 Medicare Part D claims for 62 beneficiaries, against an average of 830 among the 101,058 providers of this specialty who prescribed in Part D. Brand-name drugs were 14% of claims.
Most prescribed
- Prednisone16 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 Emergency MedicineYucaipa, CA
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Nicholas Kleen among 14,451 physician assistant records in California
Nicholas Kleen is one of 14,451 physician assistant records with a practice address in California. 75% 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 44% of them.
- NPI issued2016 · 44% of these records are older, 53% newer
- In a Medicare fileYes · 75% of these records are
- In the CMS Doctors and Clinicians fileYes · 50% of these records are
- Graduated2016 · median 2018 among the 7,214 with a school on file
- Record last updated2016 · 40% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 363A00000X and a California practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
16 physician assistant records list a practice address in Rancho Santa Margarita
They are 16 of the 479 NPPES records with a practice address in Rancho Santa Margarita, and 14,451 physician assistant records in California.
All 14,451 in California → Every provider in Rancho Santa Margarita → Physician Assistant nationwide →
The 8 physician assistant records with the nearest ZIP codes
- Jonathan ChapRancho Santa Margarita, CA 926881306510888
- Heather Cyge, PARancho Santa Margarita, CA 926881881939213
- Fatema Dewji, PHYSICIAN ASSISTANTRancho Santa Margarita, CA 926881609420348
- Kaitlyn GreeneRancho Santa Margarita, CA 926881881212728
- Sonja Harangozo, PA-CRancho Santa Margarita, CA 926881033459631
- Taylor Medeiros, PA-CRancho Santa Margarita, CA 926881457936213
- Annelise Merriner, PA-CRancho Santa Margarita, CA 926881811238777
- Rena Palmer, PA-CRancho Santa Margarita, CA 926881205681350
Common questions
What is Nicholas Kleen's NPI number?
Nicholas Kleen's National Provider Identifier (NPI) is 1750730651, issued on Jun 10, 2016. An NPI identifies a provider in billing; it is not a license.
Where is Nicholas Kleen located?
The NPPES record lists a practice address at 34 Calle Maria, Rancho Santa Margarita, CA, 92688. Phone: (949) 750-6110. Providers update this record themselves, so call before visiting.
How can I verify Nicholas Kleen's license?
Search the California board that licenses this profession; the NPPES record confirms identity only.
How much does Nicholas Kleen prescribe under Medicare Part D?
In 2024, Nicholas Kleen had 103 Medicare Part D claims for 62 beneficiaries; the average among physician assistant prescribers was 830. 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.