NPPES file of Aug 9, 2026

Jonathan Kenneth Kleen

Neurology Physician · San Francisco, CA

Jonathan Kenneth Kleen is a neurology physician with a practice address in San Francisco, California, and NPI 1255673646, issued on Mar 23, 2013. Check the license (California 134368, as entered in NPPES) on the Medical Board of California; the Medicare figures below come from public CMS files.

Record from CMS NPPES, file of Aug 9, 2026 · Medicare files 2023 and 2024 · method · Verify with CMS →

NPPES recordNPPES file of Aug 9, 2026
1255673646
Name
Jonathan Kenneth Kleen
Primary taxonomy
Neurology Physician 2084N0400X
License number
134368 CA
Self-reported in NPPES; status is on the state search
Practice location
505 Parnassus Ave, San Francisco, CA 94143
Phone
(415) 476-1489
Enumerated
Mar 23, 2013
Record last updated
Apr 5, 2016 (not updated in 10 years: call before relying on the address or phone)
Medicare enrollment
Enrolled (PECOS I20170620003270); accepts Medicare assignment
Medical or professional school
Geisel School Of Medicine At Dartmouth, 2013
Telehealth
Offers telehealth (CMS)
Entity
Type 1 · individual
Public record from CMS NPPES (open it on the CMS NPI Registry). Enrollment, assignment, school and telehealth: CMS Doctors and Clinicians file, Aug 2026. A record is not a license: verify it with the state board.
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Also registered at 505 Parnassus Ave

A shared address usually means a shared clinic or building; it does not show who employs whom.

  1. Alexander Aabedi, MDStudent in an Organized Health Care Education/Training Program1245971480
  2. Kathryn Aaronson, RN, CPNPPediatric Nurse Practitioner1992030951
  3. Sharon AbadaStudent in an Organized Health Care Education/Training Program1003492844
  4. Abul Abbas, MBBSAnatomic Pathology Physician1881652964
  5. Jesse Abelson, MDInternal Medicine Physician1083843817
  6. Rhonald AbitonaAcute Care Nurse Practitioner1164993473

Verify Jonathan Kenneth Kleen in five checks

  1. 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
  2. 2LicenseActive license and public ordersMedical Board of California
    Search for license 134368
    Check the board
  3. 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
  4. 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
  5. 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
Open the California license search

PlainDoctor does not match the HHS-OIG exclusion list to individual records: most entries carry no NPI. Search the OIG exclusion list by name.

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84% fewer Medicare Part D claims than the average neurology physician in 2024

214 Medicare Part D claims for 24 beneficiaries, against an average of 1,370 among the 15,005 providers of this specialty who prescribed in Part D. Brand-name drugs were 14% of claims.

  1. Jonathan Kleen214
  2. Specialty average1,370

Most prescribed

  1. Lamotrigine32 claims
  2. Lamotrigine Er30 claims
  3. Levetiracetam Er25 claims
  4. Clobazam19 claims
  5. Aptiom16 claims
  6. Levetiracetam13 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): 91.9 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.

  1. Qualityout of 100 · 30% of the final score83.5
  2. Costout of 100 · 30%68.0
  3. Promoting interoperabilityout of 100 · 25%100.0
  4. Improvement activities40 of 40 points · 15%100.0

Source: CMS Quality Payment Program, MIPS performance year 2023, group reporting; category weights for 2023 (qpp.cms.gov).

Bills Medicare through 3 group practices

  1. Ucsf Medical Group Business ServicesSan Francisco, CA
  2. University OF California San FranciscoSan Francisco, CA
  3. University OF California Sfgh Medical GroupSan Francisco, CA

Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).

Jonathan Kenneth Kleen among 2,339 neurology physician records in California

Jonathan Kenneth Kleen is one of 2,339 neurology physician records with a practice address in California. 81% 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 69% of them.

  • NPI issued2013 · 69% of these records are older, 29% newer
  • In a Medicare fileYes · 81% of these records are
  • In the CMS Doctors and Clinicians fileYes · 70% of these records are
  • Graduated2013 · median 2006 among the 1,628 with a school on file
  • Record last updated2016 · 55% of these records were not updated in five years or more

Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 2084N0400X and a California practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).

Neurology Physician providers in California

There are 2,339 neurology physician records in California.

The 8 neurology physician records with the nearest ZIP codes

  1. Adam Boxer, M.D.San Francisco, CA 941431841231800
  2. Dorothee Chabas Chanezon, M.D.San Francisco, CA 941431902832645
  3. Anthony Chen, MDSan Francisco, CA 941431609834472
  4. Jacob Elkins, M.D.San Francisco, CA 941431336180298
  5. Adam Gazzaley, MD PH DSan Francisco, CA 941431932142205
  6. John Hixson, MDSan Francisco, CA 941431336130475
  7. Catherine Hoerth, M.D.San Francisco, CA 941431063449866
  8. Viktoriya Irodenko, M.D.San Francisco, CA 941431023044997

Common questions

What is Jonathan Kenneth Kleen's NPI number?

Jonathan Kenneth Kleen's National Provider Identifier (NPI) is 1255673646, issued on Mar 23, 2013. An NPI identifies a provider in billing; it is not a license.

Where is Jonathan Kenneth Kleen located?

The NPPES record lists a practice address at 505 Parnassus Ave, San Francisco, CA, 94143. Phone: (415) 476-1489. Providers update this record themselves, so call before visiting.

How can I verify Jonathan Kenneth Kleen's license?

NPPES lists California license number 134368, 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 Jonathan Kenneth Kleen prescribe under Medicare Part D?

In 2024, Jonathan Kenneth Kleen had 214 Medicare Part D claims for 24 beneficiaries; the average among neurology physician prescribers was 1,370. Part D covers Medicare prescriptions only.

What is Jonathan Kenneth Kleen's MIPS final score?

The 2023 MIPS final score is 91.9 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.