Irving Klasky, M.D.
Gastroenterology Physician · Tarzana, CA
Irving Klasky, M.D. is a gastroenterology physician with a practice address in Tarzana, California, and NPI 1184681546, issued on Apr 28, 2006. Check the license (California A21160, as entered in NPPES) on the Medical Board of California; the Medicare figures below come from public CMS files.
- Name
- Irving Klasky
- Credential
- M.D.
- Primary taxonomy
- Gastroenterology Physician 207RG0100X
- License number
- A21160 CA
Self-reported in NPPES; status is on the state search - Practice location
- 18425 Burbank Blvd, Tarzana, CA 91356
- Phone
- (818) 708-6000
- Enumerated
- Apr 28, 2006
- Record last updated
- Oct 10, 2012 (not updated in 14 years: call before relying on the address or phone)
- Fax
- (818) 708-6009
- Medicaid ID
- ZZZ70039Z CA
- Entity
- Type 1 · individual
8 nearest gastroenterology physician records → All 2,140 in California → Look up another NPI →
Also registered at 18425 Burbank Blvd
A shared address usually means a shared clinic or building; it does not show who employs whom.
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- Alan Bricklin, M.D.Specialist1073539102
- Cesar Chavarria, M.D.Pediatric Critical Care Medicine Physician1609803212
- Elisa EspinozaClinical Social Worker1972231264
Verify Irving Klasky in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMedical Board of California
Search for license A21160Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
95% fewer Medicare Part D claims than the average gastroenterology physician in 2024
43 Medicare Part D claims, against an average of 811 among the 16,445 providers of this specialty who prescribed in Part D.
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.
Irving Klasky among 2,140 gastroenterology physician records in California
Irving Klasky, M.D. is one of 2,140 gastroenterology 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 2006, is newer than 7% of them.
- NPI issued2006 · 7% of these records are older, 48% newer
- In a Medicare fileYes · 83% of these records are
- In the CMS Doctors and Clinicians fileNo · 72% of these records are
- Record last updated2012 · 60% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 207RG0100X and a California practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
Gastroenterology Physician providers in California
There are 2,140 gastroenterology physician records in California.
All 2,140 in California → Every provider in Tarzana → Gastroenterology Physician nationwide →
The 8 gastroenterology physician records with the nearest ZIP codes
- Jim Amerian, M.D.Tarzana, CA 913561366400194
- Neil Fagen, MDTarzana, CA 913561700878428
- Sheldon Getzug, M.D.Tarzana, CA 913561750348785
- Maurice Gourdji, M.D.Tarzana, CA 913561699751586
- Kenneth Hepps, MDTarzana, CA 913561154313880
- Lucien Jacobs, M.D.Tarzana, CA 913561639155658
- Lori Kam, M.D.Tarzana, CA 913561144305244
- Michael Madievsky, MDTarzana, CA 913561982696613
Common questions
What is Irving Klasky, M.D.'s NPI number?
Irving Klasky, M.D.'s National Provider Identifier (NPI) is 1184681546, issued on Apr 28, 2006. An NPI identifies a provider in billing; it is not a license.
Where is Irving Klasky, M.D. located?
The NPPES record lists a practice address at 18425 Burbank Blvd, Tarzana, CA, 91356. Phone: (818) 708-6000. Providers update this record themselves, so call before visiting.
How can I verify Irving Klasky, M.D.'s license?
NPPES lists California license number A21160, 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 Irving Klasky, M.D. prescribe under Medicare Part D?
In 2024, Irving Klasky, M.D. had 43 Medicare Part D claims; the average among gastroenterology physician prescribers was 811. 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.