Gregory Lucien Simpson, M.D.
Dermatology Physician · Fresno, CA
Gregory Lucien Simpson, M.D. is a dermatology physician with a practice address in Fresno, California, and NPI 1740488238, issued on Jul 5, 2007. Check the license (California A112941, as entered in NPPES) on the Medical Board of California; the Medicare figures below come from public CMS files.
- Name
- Gregory Lucien Simpson
- Credential
- M.D.
- Primary taxonomy
- Dermatology Physician 207N00000X
- License number
- A112941 CA
Self-reported in NPPES; status is on the state search - Practice location
- 2335 E Kashian LN Ste 208, Fresno, CA 93701
- Phone
- (559) 320-1090
- Enumerated
- Jul 5, 2007
- Record last updated
- Aug 11, 2025
- Medicare enrollment
- Enrolled (PECOS I20100927001132); accepts Medicare assignment
- Medical or professional school
- University Of Tennessee, Hsc, College Of Medicine, 2006
- Entity
- Type 1 · individual
8 nearest dermatology physician records → All 2,083 in California → Look up another NPI →
Verify Gregory Lucien Simpson in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMedical Board of California
Search for license A112941Check 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% more Medicare Part D claims than the average dermatology physician in 2024
1,481 Medicare Part D claims for 383 beneficiaries, against an average of 797 among the 12,802 providers of this specialty who prescribed in Part D. Brand-name drugs were 31% of claims.
Most prescribed
- Triamcinolone Acetonide182 claims
- Dupixent Pen136 claims
- Ketoconazole107 claims
- Warfarin Sodium68 claims
- Humira(Cf) Pen65 claims
- Minoxidil59 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.
Industry payments in 2024: $105.27
5 payments; by number, the most common kind was food and beverage; the largest payer was Amgen Inc. The 10,250 providers of this specialty with any payment received $8,544.61 on average. Payments are reported by manufacturers, not by the provider, and are not a sign of wrongdoing.
Source: CMS Open Payments, program year 2024 (openpaymentsdata.cms.gov); average among providers of this specialty with at least one payment.
Bills Medicare through 2 group practices
- Central California Faculty Medical Group IncFresno, CA
- Family Healthcare NetworkVisalia, CA
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Gregory Lucien Simpson among 2,083 dermatology physician records in California
Gregory Lucien Simpson, M.D. is one of 2,083 dermatology physician records with a practice address in California. 83% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2007, is newer than 44% of them.
- NPI issued2007 · 44% of these records are older, 45% newer
- In a Medicare fileYes · 83% of these records are
- In the CMS Doctors and Clinicians fileYes · 70% of these records are
- Graduated2006 · median 2006 among the 1,450 with a school on file
- Record last updated2025 · 58% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 207N00000X and a California practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
Dermatology Physician providers in California
There are 2,083 dermatology physician records in California.
All 2,083 in California → Every provider in Fresno → Dermatology Physician nationwide →
The 8 dermatology physician records with the nearest ZIP codes
- Jane Kardashian, M.D.Fresno, CA 937101417014036
- Mary Lindae, M.D.Fresno, CA 937101558561563
- Kimberly Lomax, MSN-FNPFresno, CA 937101649124173
- Irfan Rahman, M.D.Fresno, CA 937101528252038
- Douglas Swinehart, M.D.Fresno, CA 937101144214230
- David Taylor, M.D.Fresno, CA 937101932104601
- John Boswell, MDFresno, CA 937111295936961
- Erika Kettelhut, DOFresno, CA 937111679012868
Common questions
What is Gregory Lucien Simpson, M.D.'s NPI number?
Gregory Lucien Simpson, M.D.'s National Provider Identifier (NPI) is 1740488238, issued on Jul 5, 2007. An NPI identifies a provider in billing; it is not a license.
Where is Gregory Lucien Simpson, M.D. located?
The NPPES record lists a practice address at 2335 E Kashian LN Ste 208, Fresno, CA, 93701. Phone: (559) 320-1090. Providers update this record themselves, so call before visiting.
How can I verify Gregory Lucien Simpson, M.D.'s license?
NPPES lists California license number A112941, 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 Gregory Lucien Simpson, M.D. prescribe under Medicare Part D?
In 2024, Gregory Lucien Simpson, M.D. had 1,481 Medicare Part D claims for 383 beneficiaries; the average among dermatology physician prescribers was 797. 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.
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.