Pamela Nanette Diefenbach, M.D.
Psychiatry Physician · Los Angeles, CA
Pamela Nanette Diefenbach, M.D. is a psychiatry physician with a practice address in Los Angeles, California, and NPI 1437100609, issued on May 13, 2006. Check the license (California G64167, as entered in NPPES) on the Medical Board of California; the Medicare figures below come from public CMS files.
- Name
- Pamela Nanette Diefenbach
- Credential
- M.D.
- Primary taxonomy
- Psychiatry Physician 2084P0800X
- License number
- G64167 CA
Self-reported in NPPES; status is on the state search - Practice location
- 11301 Wilshire Blvd, Los Angeles, CA 90073
- Phone
- (310) 268-4037
- Enumerated
- May 13, 2006
- Record last updated
- Nov 18, 2021 (not updated in 5 years: call before relying on the address or phone)
- Fax
- (310) 268-4433
- Entity
- Type 1 · individual
8 nearest psychiatry physician records → All 8,673 in California → Look up another NPI →
Also registered at 11301 Wilshire Blvd
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Frances Abad, FNPFamily Nurse Practitioner1053504514
- Oluwakemi AbayomiPsychiatric/Mental Health Nurse Practitioner1598508913
- Vanessa AbcedeSocial Worker1306584495
- Maren Abromowitz, FNP-BCFamily Nurse Practitioner1356950919
- Nayiri Adessian, MS, CCC-SLPSpeech-Language Pathologist1326761420
- Farzad AdibStudent in an Organized Health Care Education/Training Program1558745869
Verify Pamela Nanette Diefenbach in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMedical Board of California
Search for license G64167Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
77% fewer Medicare Part D claims than the average psychiatry physician in 2024
230 Medicare Part D claims for 102 beneficiaries, against an average of 1,000 among the 35,054 providers of this specialty who prescribed in Part D.
Most prescribed
- Bupropion Xl28 claims
- Trazodone Hcl23 claims
- Fluoxetine Hcl22 claims
- Sertraline Hcl19 claims
- Aripiprazole18 claims
- Duloxetine Hcl15 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.
Pamela Nanette Diefenbach among 8,673 psychiatry physician records in California
Pamela Nanette Diefenbach, M.D. is one of 8,673 psychiatry physician records with a practice address in California. 67% 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 2% of them.
- NPI issued2006 · 2% of these records are older, 67% newer
- In a Medicare fileYes · 67% of these records are
- In the CMS Doctors and Clinicians fileNo · 38% of these records are
- Record last updated2021 · 54% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 2084P0800X and a California practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
987 psychiatry physician records list a practice address in Los Angeles
They are 987 of the 69,537 NPPES records with a practice address in Los Angeles, and 8,673 psychiatry physician records in California.
All 8,673 in California → Every provider in Los Angeles → Psychiatry Physician nationwide →
The 8 psychiatry physician records with the nearest ZIP codes
- Donna Ames (formerly Wirshing), M.D.Los Angeles, CA 900731821187030
- Mace Beckson, M.D.Los Angeles, CA 900731558455287
- Roger Donovick, MDLos Angeles, CA 900731710902622
- Donald Eknoyan, M.D.Los Angeles, CA 900731528027174
- Denise Feil, MDLos Angeles, CA 900731265484943
- Neil Hartman, MD, PHDLos Angeles, CA 900731831287804
- Behnaz Jalali, MDLos Angeles, CA 900731619075231
- Alina McKenna, MDLos Angeles, CA 900731609988559
Common questions
What is Pamela Nanette Diefenbach, M.D.'s NPI number?
Pamela Nanette Diefenbach, M.D.'s National Provider Identifier (NPI) is 1437100609, issued on May 13, 2006. An NPI identifies a provider in billing; it is not a license.
Where is Pamela Nanette Diefenbach, M.D. located?
The NPPES record lists a practice address at 11301 Wilshire Blvd, Los Angeles, CA, 90073. Phone: (310) 268-4037. Providers update this record themselves, so call before visiting.
How can I verify Pamela Nanette Diefenbach, M.D.'s license?
NPPES lists California license number G64167, 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 Pamela Nanette Diefenbach, M.D. prescribe under Medicare Part D?
In 2024, Pamela Nanette Diefenbach, M.D. had 230 Medicare Part D claims for 102 beneficiaries; the average among psychiatry physician prescribers was 1,000. 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.