NPPES file of Aug 9, 2026

James A. Pierre, MD, MPH

Addiction Medicine (Preventive Medicine) Physician · Simi Valley, CA

James A. Pierre, MD, MPH is an addiction medicine (preventive medicine) physician with a practice address in Simi Valley, California, and NPI 1003194309, issued on Aug 3, 2011. Check the license (California C180637, 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
1003194309
Name
James A. Pierre
Credential
MD, MPH
Primary taxonomy
Addiction Medicine (Preventive Medicine) Physician 2083A0300X
License numbers
C180637 CA
287401 MA
4301501025 MI
Self-reported in NPPES; status is on the state search
Practice location
3855 Alamo St Ste A, Simi Valley, CA 93063
Phone
(504) 813-3864
Enumerated
Aug 3, 2011
Record last updated
Jan 19, 2023
Medicare enrollment
Enrolled (PECOS I20221018002821); accepts Medicare assignment
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 addiction medicine (preventive medicine) physician records → All 50 in California → Look up another NPI →

Also registered at 3855 Alamo St Ste A

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

  1. Rachele Catlett Gomez, LCSWClinical Social Worker1497302236
  2. Leticia Delling, LMFTMarriage & Family Therapist1609188374
  3. Tristan Sanchez, MSMarriage & Family Therapist1700357654
  4. Jennifer Santillo, LMFTCounselor1811172075
  5. Rosa Singer, MSW, LCSWClinical Social Worker1366745861

Verify James A. Pierre in five checks

  1. 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
  2. 2LicenseActive license and public ordersMedical Board of California
    Search for license C180637    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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26% fewer Medicare Part D claims than the average addiction medicine (preventive medicine) physician in 2024

312 Medicare Part D claims for 55 beneficiaries, against an average of 420 among the 224 providers of this specialty who prescribed in Part D.

  1. James Pierre312
  2. Specialty average420

Most prescribed

  1. Naltrexone Hcl149 claims
  2. Buprenorphine-Naloxone79 claims
  3. Gabapentin15 claims
  4. Trazodone Hcl13 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.

Bills Medicare through one group practice

  1. Southern California Permanente Medical GroupWoodland Hills, CA

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

James A. Pierre among 50 addiction medicine (preventive medicine) physician records in California

James A. Pierre, MD, MPH is one of 50 addiction medicine (preventive medicine) physician records with a practice address in California. 78% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2011, is newer than 42% of them.

  • NPI issued2011 · 42% of these records are older, 54% newer
  • In a Medicare fileYes · 78% of these records are
  • In the CMS Doctors and Clinicians fileYes · 48% of these records are
  • Graduated2007 · median 2013 among the 24 with a school on file
  • Record last updated2023 · 12% of these records were not updated in five years or more

Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 2083A0300X and a California practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).

Addiction Medicine (Preventive Medicine) Physician providers in California

There are 50 addiction medicine (preventive medicine) physician records in California.

All 50 in California → Every provider in Simi Valley → Addiction Medicine (Preventive Medicine) Physician nationwide →

The 8 addiction medicine (preventive medicine) physician records with the nearest ZIP codes

  1. Veronica Valdivia, CCMA-COxnard, CA 930361912562778
  2. Jiseung Yoon, MDCorona, CA 928821144742420
  3. Mario San Bartolome, MDWestminster, CA 926831154420024
  4. Carrick Adam, M.D., M.S.P.HSanta Maria, CA 934581013137603
  5. Evaggelos Mitrevolis, MDAliso Viejo, CA 926561154632990
  6. Cabrina BlaylockNuevo, CA 925671376389858
  7. Steven Ruh, M.D.Riverside, CA 925011902929193
  8. Michael Valdez, M.D.Riverside, CA 925011205923224

Common questions

What is James A. Pierre, MD, MPH's NPI number?

James A. Pierre, MD, MPH's National Provider Identifier (NPI) is 1003194309, issued on Aug 3, 2011. An NPI identifies a provider in billing; it is not a license.

Where is James A. Pierre, MD, MPH located?

The NPPES record lists a practice address at 3855 Alamo St Ste A, Simi Valley, CA, 93063. Phone: (504) 813-3864. Providers update this record themselves, so call before visiting.

How can I verify James A. Pierre, MD, MPH's license?

NPPES lists California license number C180637, 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 James A. Pierre, MD, MPH prescribe under Medicare Part D?

In 2024, James A. Pierre, MD, MPH had 312 Medicare Part D claims for 55 beneficiaries; the average among addiction medicine (preventive medicine) physician prescribers was 420. 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.