Paul Joseph Simpson, M.D.
Pulmonary Disease Physician · Fullerton, CA
Paul Joseph Simpson, M.D. is a pulmonary disease physician with a practice address in Fullerton, California, and NPI 1104169978, issued on Mar 31, 2013. Check the license (California A167694, as entered in NPPES) on the Medical Board of California; the Medicare figures below come from public CMS files.
- Name
- Paul Joseph Simpson
- Credential
- M.D.
- Primary taxonomy
- Pulmonary Disease Physician 207RP1001X
- License number
- A167694 CA
Self-reported in NPPES; status is on the state search - Practice location
- 2501 E Chapman Ave Ste 225, Fullerton, CA 92831
- Phone
- (714) 481-0172
- Enumerated
- Mar 31, 2013
- Record last updated
- May 26, 2020 (not updated in 6 years: call before relying on the address or phone)
- Fax
- (562) 445-4140
- Medicare enrollment
- Enrolled (PECOS I20200626001223); accepts Medicare assignment
- Telehealth
- Offers telehealth (CMS)
- Entity
- Type 1 · individual
8 nearest pulmonary disease physician records → All 1,443 in California → Look up another NPI →
Also registered at 2501 E Chapman Ave Ste 225
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Saadah Alrajab, MDPulmonary Disease Physician1023050135
Verify Paul Joseph Simpson in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMedical Board of California
Search for license A167694Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
86% fewer Medicare Part D claims than the average pulmonary disease physician in 2024
200 Medicare Part D claims for 37 beneficiaries, against an average of 1,425 among the 11,596 providers of this specialty who prescribed in Part D. Brand-name drugs were 53% of claims.
Most prescribed
- Trelegy Ellipta38 claims
- Acetylcysteine19 claims
- Fluticasone Propionate19 claims
- Ventolin Hfa18 claims
- Albuterol Sulfate Hfa14 claims
- Montelukast Sodium12 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.
The MIPS final score for 2023 (Medicare payment program): 6.6 of 100
The Merit-based Incentive Payment System score is reported for this clinician. Four categories are weighted into the final score; the average among 454,083 clinicians with a measured score was 83.5.
Source: CMS Quality Payment Program, MIPS performance year 2023; category weights for 2023 (qpp.cms.gov).
Bills Medicare through one group practice
- Saadah Alrajab MD Mph IncLa Mirada, CA
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Paul Joseph Simpson among 1,443 pulmonary disease physician records in California
Paul Joseph Simpson, M.D. is one of 1,443 pulmonary disease physician records with a practice address in California. 84% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2013, is newer than 77% of them.
- NPI issued2013 · 77% of these records are older, 20% newer
- In a Medicare fileYes · 84% of these records are
- In the CMS Doctors and Clinicians fileYes · 74% of these records are
- Graduated2013 · median 2002 among the 1,061 with a school on file
- Record last updated2020 · 55% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 207RP1001X and a California practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
Pulmonary Disease Physician providers in California
There are 1,443 pulmonary disease physician records in California.
All 1,443 in California → Every provider in Fullerton → Pulmonary Disease Physician nationwide →
The 8 pulmonary disease physician records with the nearest ZIP codes
- Mohamad Abdelfattah, MDFullerton, CA 928311134539711
- Saadah Alrajab, MDFullerton, CA 928311023050135
- James Hardeman, M.D.Fullerton, CA 928351043399017
- Farhan Khabaz, MDFullerton, CA 928351427159458
- Edward Lawton, M.D..Fullerton, CA 928351801882261
- Louis McNabb, M.D.Fullerton, CA 928351346329323
- Andy Tran, M.D.Fullerton, CA 928351326059882
- Mark Weissig, M.D.Fullerton, CA 928351649266032
Common questions
What is Paul Joseph Simpson, M.D.'s NPI number?
Paul Joseph Simpson, M.D.'s National Provider Identifier (NPI) is 1104169978, issued on Mar 31, 2013. An NPI identifies a provider in billing; it is not a license.
Where is Paul Joseph Simpson, M.D. located?
The NPPES record lists a practice address at 2501 E Chapman Ave Ste 225, Fullerton, CA, 92831. Phone: (714) 481-0172. Providers update this record themselves, so call before visiting.
How can I verify Paul Joseph Simpson, M.D.'s license?
NPPES lists California license number A167694, 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 Paul Joseph Simpson, M.D. prescribe under Medicare Part D?
In 2024, Paul Joseph Simpson, M.D. had 200 Medicare Part D claims for 37 beneficiaries; the average among pulmonary disease physician prescribers was 1,425. Part D covers Medicare prescriptions only.
What is Paul Joseph Simpson, M.D.'s MIPS final score?
The 2023 MIPS final score is 6.6 of 100. The average among 454,083 clinicians with a measured score was 83.5.
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.