NPPES file of Aug 9, 2026

Claude Guy Wasterlain, M.D.

Neurology Physician · West Los Angeles, CA

Claude Guy Wasterlain, M.D. is a neurology physician with a practice address in West Los Angeles, California, and NPI 1407958739, issued on Sep 5, 2006. Check the license (California A29823, 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
1407958739
Name
Claude Guy Wasterlain
Credential
M.D.
Primary taxonomy
Neurology Physician 2084N0400X
License number
A29823 CA
Self-reported in NPPES; status is on the state search
Practice location
11301 Wilshire Boulevard, West Los Angeles, CA 90073
Phone
(310) 268-3595
Enumerated
Sep 5, 2006
Record last updated
Jul 8, 2007 (not updated in 19 years: call before relying on the address or phone)
Fax
(310) 268-4611
Entity
Type 1 · individual
Public record from CMS NPPES (open it on the CMS NPI Registry). A record is not a license: verify it with the state board.
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8 nearest neurology physician records → All 2,339 in California → Look up another NPI →

Verify Claude Guy Wasterlain in five checks

  1. 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
  2. 2LicenseActive license and public ordersMedical Board of California
    Search for license A29823    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

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99% fewer Medicare Part D claims than the average neurology physician in 2024

14 Medicare Part D claims, against an average of 1,370 among the 15,005 providers of this specialty who prescribed in Part D. Brand-name drugs were 0% of claims.

  1. Claude Wasterlain14
  2. Specialty average1,370

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.

Claude Guy Wasterlain among 2,339 neurology physician records in California

Claude Guy Wasterlain, M.D. 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 2006, is newer than 4% of them.

  • NPI issued2006 · 4% of these records are older, 59% newer
  • In a Medicare fileYes · 81% of these records are
  • In the CMS Doctors and Clinicians fileNo · 70% of these records are
  • Record last updated2007 · 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).

1 neurology physician record lists a practice address in West Los Angeles

They are 1 of the 41 NPPES records with a practice address in West Los Angeles, and 2,339 neurology physician records in California.

All 2,339 in California → Every provider in West Los Angeles → Neurology Physician nationwide →

The 8 neurology physician records with the nearest ZIP codes

  1. Robert Baumhefner, M.D.Los Angeles, CA 900731336187525
  2. Eliot Licht, M.D.Los Angeles, CA 900731053515478
  3. Michael Mahler, MDLos Angeles, CA 900731831143114
  4. Roi Wallis, M.D.Los Angeles, CA 900731154422392
  5. Lisa Cook, MDLos Angeles, CA 900671508983222
  6. Eric Kim, M.D.Los Angeles, CA 900651194161091
  7. Moshe Hendizadeh, MDLos Angeles, CA 900641184021040
  8. Daniel Chang, MDLos Angeles, CA 900571194761841

Common questions

What is Claude Guy Wasterlain, M.D.'s NPI number?

Claude Guy Wasterlain, M.D.'s National Provider Identifier (NPI) is 1407958739, issued on Sep 5, 2006. An NPI identifies a provider in billing; it is not a license.

Where is Claude Guy Wasterlain, M.D. located?

The NPPES record lists a practice address at 11301 Wilshire Boulevard, West Los Angeles, CA, 90073. Phone: (310) 268-3595. Providers update this record themselves, so call before visiting.

How can I verify Claude Guy Wasterlain, M.D.'s license?

NPPES lists California license number A29823, 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 Claude Guy Wasterlain, M.D. prescribe under Medicare Part D?

In 2024, Claude Guy Wasterlain, M.D. had 14 Medicare Part D claims; the average among neurology physician prescribers was 1,370. 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.