NPPES file of Aug 9, 2026

Kenneth A. Kazenelson, M.D.

Family Medicine Physician · Rancho Santa Margarita, CA

Kenneth A. Kazenelson, M.D. is a family medicine physician with a practice address in Rancho Santa Margarita, California, and NPI 1275539637, issued on Jun 21, 2005. Check the license (California A86358, 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 2024 · method · Verify with CMS →

NPPES recordNPPES file of Aug 9, 2026
1275539637
Name
Kenneth A. Kazenelson
Credential
M.D.
Primary taxonomy
Family Medicine Physician 207Q00000X
License number
A86358 CA
Self-reported in NPPES; status is on the state search
Practice location
29472 Avenida DE Las Bandera, Rancho Santa Margarita, CA 92688
Phone
(949) 459-9968
Enumerated
Jun 21, 2005
Record last updated
Feb 10, 2015 (not updated in 11 years: call before relying on the address or phone)
Fax
(949) 766-2565
Medicare enrollment
Enrolled (PECOS I20051110001007); accepts Medicare assignment
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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8 nearest family medicine physician records → All 17,133 in California → Look up another NPI →

Also registered at 29472 Avenida DE Las Bandera

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

  1. Ryan Ah San, PA-CMedical Physician Assistant1013181346
  2. Mark Cianciola, MDFamily Medicine Physician1750371035
  3. Daizy Engineer, MDPediatrics Physician1467442897
  4. Monique Johnson, PHARM.D.Pharmacist1568641637
  5. Sumant Nagarkar, MDFamily Medicine Physician1316938871
  6. Bonnie Pittaluga, MDPediatrics Physician1437135019

Verify Kenneth A. Kazenelson in five checks

  1. 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
  2. 2LicenseActive license and public ordersMedical Board of California
    Search for license A86358    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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32% more Medicare Part D claims than the average family medicine physician in 2024

4,671 Medicare Part D claims for 591 beneficiaries, against an average of 3,544 among the 117,163 providers of this specialty who prescribed in Part D. 39 claims were for opioids.

  1. Kenneth Kazenelson4,671
  2. Specialty average3,544

Most prescribed

  1. Atorvastatin Calcium273 claims
  2. Levothyroxine Sodium233 claims
  3. Losartan Potassium182 claims
  4. Amlodipine Besylate167 claims
  5. Metformin Hcl165 claims
  6. Zolpidem Tartrate140 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: $18.43

1 payment: food and beverage; the largest payer was Abbvie Inc. The 55,478 providers of this specialty with any payment received $902.55 on average. Payments are reported by manufacturers, not by the provider, and are not a sign of wrongdoing.

  1. Kenneth Kazenelson$18.43
  2. Specialty average$902.55

Source: CMS Open Payments, program year 2024 (openpaymentsdata.cms.gov); average among providers of this specialty with at least one payment.

Bills Medicare through one group practice

  1. Memorialcare Medical FoundationRancho Santa Margarita, CA

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

Kenneth A. Kazenelson among 17,133 family medicine physician records in California

Kenneth A. Kazenelson, M.D. is one of 17,133 family medicine 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 2005, is newer than 0% of them.

  • NPI issued2005 · 0% of these records are older, 94% newer
  • In a Medicare fileYes · 81% of these records are
  • In the CMS Doctors and Clinicians fileYes · 62% of these records are
  • Graduated2000 · median 2005 among the 10,652 with a school on file
  • Record last updated2015 · 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 207Q00000X and a California practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).

14 family medicine physician records list a practice address in Rancho Santa Margarita

They are 14 of the 479 NPPES records with a practice address in Rancho Santa Margarita, and 17,133 family medicine physician records in California.

All 17,133 in California → Every provider in Rancho Santa Margarita → Family Medicine Physician nationwide →

The 8 family medicine physician records with the nearest ZIP codes

  1. Mark Adlard, M.D.Rancho Santa Margarita, CA 926881346265766
  2. Natalia Bilan, MDRancho Santa Margarita, CA 926881376644377
  3. Mark Cianciola, MDRancho Santa Margarita, CA 926881750371035
  4. Eriel Datuin, MDRancho Santa Margarita, CA 926881487230249
  5. Peter Desilva, MDRancho Santa Margarita, CA 926881316045636
  6. Alexa Desilva, PA-CRancho Santa Margarita, CA 926881023630753
  7. John Foley, MDRancho Santa Margarita, CA 926881699235515
  8. Huy Huynh, DORancho Santa Margarita, CA 926881851975866

Common questions

What is Kenneth A. Kazenelson, M.D.'s NPI number?

Kenneth A. Kazenelson, M.D.'s National Provider Identifier (NPI) is 1275539637, issued on Jun 21, 2005. An NPI identifies a provider in billing; it is not a license.

Where is Kenneth A. Kazenelson, M.D. located?

The NPPES record lists a practice address at 29472 Avenida DE Las Bandera, Rancho Santa Margarita, CA, 92688. Phone: (949) 459-9968. Providers update this record themselves, so call before visiting.

How can I verify Kenneth A. Kazenelson, M.D.'s license?

NPPES lists California license number A86358, 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 Kenneth A. Kazenelson, M.D. prescribe under Medicare Part D?

In 2024, Kenneth A. Kazenelson, M.D. had 4,671 Medicare Part D claims for 591 beneficiaries; the average among family medicine physician prescribers was 3,544. 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.

Written with AI tools from the named public files; every figure is computed from those files (how it is made).

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.