Paul Simpson, M.D.
NPI 1104169978 · Pulmonary Disease Physician · Fullerton, CA
Enrolled with Medicare as Practitioner - Pulmonary Disease · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Paul Simpson, M.D. is a Pulmonary Disease Physician provider in Fullerton, CA (NPI 1104169978).
Provider details
- NPI number
- 1104169978
- Entity type
- Individual
- Primary specialty
- Pulmonary Disease PhysicianAllopathic & Osteopathic Physicians
- Credential
- M.D.
- Sex
- Male
- Sole proprietor
- Yes
- License
- A167694 (CA)
Specialties & taxonomies
Allopathic & Osteopathic Physicians
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure28% of score
13 yrs in NPPES registry
- Profile completeness28% of score
100% of core fields populated
- Practice footprint17% of score
1 documented practice location
- Medicare service volume (vs. specialty peers)28% of score
6,646 Medicare services, 2024 (ranked within specialty)
Medicare volume is ranked against active providers in the same specialty. Signals a provider has no public data for (e.g. Medicare claims) are left out of the score entirely — never counted as zero — so providers without that data are not penalized. See the full formula and weights in our methodology.
What this provider does (Medicare)
Based on Medicare fee-for-service claims, 2024; not all care is captured.
| Service (HCPCS) | Medicare services | Typical Medicare-allowed (2024) |
|---|---|---|
| Subsequent Hospital Care With Moderate Levelof Medical Decision Making, If Using Time, at Least 35 Minutes99232 | 4,971 | $76 |
| Critical Care, First 30-74 Minutes99291 | 704 | $201 |
| Initial Hospital Care With Moderate Level of Medical Decision Making, If Using Time, at Least 75 Minutes99223 | 335 | $166 |
| Subsequent Hospital Care With Moderate Levelof Medical Decision Making, If Using Time, at Least 50 Minutes99233 | 248 | $114 |
| Subsequent Nursing Facility Care With Straightforward Level of Medical Decision Making, Per Day, If Using Time, 20 Minutes Or More99308 | 180 | $73 |
| Critical Care, Each Additional 30 Minutes99292 | 59 |
What this provider prescribes (Medicare Part D)
Top drugs by Medicare Part D claim volume, 2024 · 6 distinct drugs on file.
| Drug | Part D claims (2024) |
|---|---|
| Fluticasone/Umeclidin/Vilanterbrand: Trelegy Ellipta | 38 |
| Acetylcysteine | 19 |
| Fluticasone Propionate | 19 |
| Albuterol Sulfatebrand: Ventolin Hfa | 18 |
| Albuterol Sulfatebrand: Albuterol Sulfate Hfa | 14 |
| Montelukast Sodium | 12 |
Medicare Part D only. These counts cover prescriptions paid through Medicare Part D in 2024 — they do notinclude cash-pay, commercial-insurance, Medicaid, or Part B–administered drugs, and badly undercount high cash-pay categories (e.g. GLP-1 weight-loss, testosterone, and ED medications). Any drug with 10 or fewer claims is omitted by CMS, and beneficiary counts under 11 are suppressed — so a missing drug means no Part D record, never zero. This is a factual claims summary, not an endorsement, not medical advice, and not a consumer report. Source: CMS Medicare Part D Prescribers — by Provider and Drug.
Practice location
Mailing address
Registry dates
- Enumerated
- 2013-03-31
- Last updated
- 2020-05-26
- Certified
- 2020-05-26
Frequently asked questions
- What is Paul Simpson's NPI number?
- Paul Simpson's National Provider Identifier (NPI) is 1104169978, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Paul Simpson's specialty?
- Paul Simpson is listed in the NPPES registry with a primary specialty of Pulmonary Disease Physician (Allopathic & Osteopathic Physicians).
- Where is Paul Simpson located?
- Paul Simpson's practice location on file with NPPES is 2501 E Chapman Ave Ste 225, Fullerton, CA 92831-3187.
- What is Paul Simpson's phone number?
- The practice phone number listed in the NPPES registry for Paul Simpson is (714) 481-0172.
- Does Paul Simpson accept Medicare?
- Paul Simpson is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Paul Simpson's NPI active?
- Yes — Paul Simpson's NPI (1104169978) is active in the NPPES registry as of the last update on 2020-05-26.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.