503B Docket

MedisourceRx 503B outsourcing facility · Los Alamitos, CA

This is a record of what FDA published, not a rating. Last FDA inspection and Form 483 status below are as published in FDA's registered outsourcing facilities table (as of Sep 30, 2026).

FDA registration record

Listed by FDA asMedisourceRx, Los Alamitos, CA
City / stateLos Alamitos, CA
FDA's table lists city and state only, not a street address.
Contact phone (as listed by FDA)1-714-455-1300
Initial registration date2/14/2017
Most recent registration date1/2/2026
Outsourcing facilities must re-register annually (Oct 1 – Dec 31) to remain on FDA's list.
Last inspection (FDA table)6/10/2025
Form 483 issued at last inspection?Yes · View Form 483 (FDA PDF)
Recall conducted? (FDA table)No
Action based on last inspectionWarning Letter Closeout Issued 7/27/2026 Warning Letter Issued 12/12/2025 · Warning Letter Issued 12/12/2025
“Open” means FDA has not determined whether further action will be taken (per FDA's table notes).
Intends to compound sterile drugs from bulk substancesYes
Self-reported by the facility at registration; FDA notes this information has not been verified by FDA.

Source: FDA Registered Outsourcing Facilities

Published FDA records

2Form 483 records
1Warning letters
0Recall events (openFDA)
0Uncertain-match items

Counts include only items from FDA's table or exact name + city + state matches. They are counts of published records, not a score. Uncertain matches are shown below but not counted.

State board of pharmacy license lookup

California State Board of Pharmacy (DCA License Search) (license lookup)

Search the state board's lookup for this facility's license status and any disciplinary actions. We link to the state-level tool only and do not list license numbers. FDA's table does not include state board actions. Facilities that ship across state lines may also hold non-resident licenses in your state, so check your own state's board too.

Verify directly

Represent this facility? Claim this profile. Claimed profiles never change FDA records.

Timeline of FDA actions

Newest first. Sources: FDA's registration table, FDA's compounding actions page (2019 onward on the live page), and openFDA drug enforcement records. Items marked Uncertain match may relate to a different site or entity and are not counted. How matching works.

  1. Warning letter close-out FDA table
    Warning Letter Closeout Issued 7/27/2026
    No document link published · FDA registered outsourcing facilities table
  2. Warning letter FDA table
    Warning Letter Issued 12/12/2025
    FDA document · FDA registered outsourcing facilities table
  3. Inspection FDA table
    Last inspection per FDA table; Form 483 issued: Yes
    FDA document · FDA registered outsourcing facilities table
  4. Form FDA 483 FDA table
    Form FDA 483 (linked from FDA's registration table)
    FDA document · FDA registered outsourcing facilities table
  5. FMD-145 letter Matched
    FMD-145 Letter Issued 04/14/2023
    Listed on FDA page under: MedisourceRx, Los Alamitos, CA - 503B Facility
    No document link published · FDA Compounding: Inspections, Recalls, and other Actions
  6. FMD-145 letter Matched
    FMD-145 Letter Issued 06/28/2021
    Listed on FDA page under: MedisourceRx, Los Alamitos, CA - 503B Facility
    No document link published · FDA Compounding: Inspections, Recalls, and other Actions
  7. Form FDA 483 Matched
    483 Issued 10/22/2020 (PDF - 1.15MB)
    Listed on FDA page under: MedisourceRx, Los Alamitos, CA - 503B Facility
    FDA document · FDA Compounding: Inspections, Recalls, and other Actions