Quick answers
- Does Paul J. Simpson Ii accept Medicare assignment?
- Yes. Medicare's clinician data says Paul J. Simpson Ii accepts Medicare assignment (the Medicare-approved amount as full payment for covered services), as of October 2, 2026. Ask the office to confirm before your visit.
- How many Medicare patients does Paul J. Simpson Ii see?
- In 2024, CMS data shows 679 Original Medicare patients and 6,707 services for Paul J. Simpson Ii. This counts Original Medicare only and measures volume, not quality.
- What is Paul J. Simpson Ii's NPI number?
- 1104169978. The NPI (National Provider Identifier) is the clinician's permanent federal ID; you can look it up in the official NPI Registry.
Medicare activity in 2024
Official CMS public-use data for Paul J. Simpson Ii, data year 2024 (released May 21, 2026). It covers Original Medicare (fee-for-service) patients only, not Medicare Advantage or other insurance. It shows volume, not quality or outcomes. CMS hides any count of 10 or fewer patients.
| Original Medicare patients | 679 |
|---|---|
| Services billed to Medicare | 6,707 |
| Different services or procedures | 40 |
| Participating Medicare provider | Yes |
| Average age of these patients | 76 |
Most frequent services
- Subsequent hospital care with moderate levelof medical decision making, if using time, at least 35 minutes (99232)4,971 services
- Critical care, first 30-74 minutes (99291)704 services
- Initial hospital care with moderate level of medical decision making, if using time, at least 75 minutes (99223)335 services
- Subsequent hospital care with moderate levelof medical decision making, if using time, at least 50 minutes (99233)248 services
- Subsequent nursing facility care with straightforward level of medical decision making, per day, if using time, 20 minutes or more (99308)180 services
Chronic conditions among these patients
Share of this clinician’s Original Medicare patients with each condition, as published by CMS (it describes the patients, not the care given).
- High blood pressure75%
- High cholesterol75%
- Heart failure72%
- Diabetes67%
- Chronic kidney disease63%
- COPD54%
Hospitals where Paul J. Simpson Ii works
Medicare's Facility Affiliation Data lists Paul J. Simpson Ii at these hospitals (updated October 2, 2026). Each hospital page shows its address, phone, emergency services, Medicare rating and all its clinicians. Star rating and emergency services: Hospital General Information (CMS), data updated October 26, 2026.
- Chapman Global Medical CenterOrange, CA · Acute Care Hospital · Medicare rating: 2 of 5 stars · Emergency services: not listed by Medicare · CCN 050745
- Foothill Regional Medical CenterTustin, CA · Acute Care Hospital · Medicare rating: 3 of 5 stars · Emergency services: not listed by Medicare · CCN 050780
- Orange County Global Medical CenterSanta Ana, CA · Acute Care Hospital · Medicare rating: 2 of 5 stars · Emergency services: listed by Medicare · CCN 050746
- Providence St. Jude Medical CenterFullerton, CA · Acute Care Hospital · Medicare rating: 4 of 5 stars · Emergency services: listed by Medicare · CCN 050168
- Whittier Hospital Medical CenterWhittier, CA · Acute Care Hospital · Medicare rating: 4 of 5 stars · Emergency services: listed by Medicare · CCN 050735
Practice locations
Addresses where Paul J. Simpson Ii is enrolled with Medicare (CMS data updated October 2, 2026).
- 14900 Imperial HwyLa Mirada, CA 90638 (562) 944‑1900
Group practices
Medicare enrollment lists Paul J. Simpson Ii as a member of this group (CMS data updated October 2, 2026).
- Saadah Alrajab MD MPH Inc3 clinicians in the group
Specialties
Other pulmonologists in California
Clinicians with the same Medicare primary specialty in California — not a recommendation.
Other clinicians in Saadah Alrajab MD MPH Inc
Medicare enrollment lists these clinicians in the same group practice — not a recommendation.
Clinician information
| Credential | MD |
|---|---|
| Graduation year | 2013 (13 years since medical school) |
| Gender (as listed) | Male |
| Medicare assignment | Accepts (Medicare-approved amount as full payment) |
| Telehealth | Offers telehealth services |
| NPI (National Provider Identifier) | 1104169978 |
| Corrections | Report an error or suggest an update → |
Most corrections must be made at the source: clinicians update their NPI Registry record (NPPES) and their Medicare enrollment (PECOS); this page follows the next data release.
Sources
- Facility Affiliation Data — Centers for Medicare & Medicaid Services (CMS), data updated October 2, 2026, retrieved October 29, 2026
- Hospital General Information — CMS, data updated October 26, 2026, retrieved November 13, 2026
- National Downloadable File (Doctors and Clinicians) — CMS, data updated October 2, 2026, retrieved October 29, 2026
- Medicare Physician & Other Practitioners - by Provider — CMS, data year 2024, released May 21, 2026; Medicare Physician & Other Practitioners - by Provider and Service
- NPI Registry — U.S. Department of Health and Human Services (NPPES), the clinician’s official record
- Medicare Care Compare — official Medicare tool to look up clinicians