Mark Jeffrey Decker, M.D.
Family Medicine Physician · West Chester, PA
Mark Jeffrey Decker, M.D. is a family medicine physician with a practice address in West Chester, Pennsylvania, and NPI 1407829070, issued on Feb 13, 2006. Check the license (Pennsylvania MD433213, as entered in NPPES) on the Pennsylvania Department of State (PALS); the Medicare figures below come from public CMS files.
- Name
- Mark Jeffrey Decker
- Credential
- M.D.
- Primary taxonomy
- Family Medicine Physician 207Q00000X
- License numbers
- MD433213 PA
127284 NY
Self-reported in NPPES; status is on the state search - Practice location
- 4 Sloan RD., West Chester, PA 19382
- Phone
- (860) 871-0220
- Enumerated
- Feb 13, 2006
- Record last updated
- Sep 5, 2018 (not updated in 8 years: call before relying on the address or phone)
- Fax
- (860) 875-3993
- Medicaid ID
- 00121543301 CT
- Entity
- Type 1 · individual
8 nearest family medicine physician records → All 7,483 in Pennsylvania → Look up another NPI →
Verify Mark Jeffrey Decker in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersPennsylvania Department of State (PALS)
Search for license MD433213Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
99% fewer Medicare Part D claims than the average family medicine physician in 2024
35 Medicare Part D claims, against an average of 3,544 among the 117,163 providers of this specialty who prescribed in Part D.
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.
Mark Jeffrey Decker among 7,483 family medicine physician records in Pennsylvania
Mark Jeffrey Decker, M.D. is one of 7,483 family medicine physician records with a practice address in Pennsylvania. 79% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2006, is newer than 12% of them.
- NPI issued2006 · 12% of these records are older, 53% newer
- In a Medicare fileYes · 79% of these records are
- In the CMS Doctors and Clinicians fileNo · 61% of these records are
- Record last updated2018 · 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 207Q00000X and a Pennsylvania practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
57 family medicine physician records list a practice address in West Chester
They are 57 of the 2,831 NPPES records with a practice address in West Chester, and 7,483 family medicine physician records in Pennsylvania.
All 7,483 in Pennsylvania → Every provider in West Chester → Family Medicine Physician nationwide →
The 8 family medicine physician records with the nearest ZIP codes
- Susan Dallas-Feeney, D.O.West Chester, PA 193821922187277
- Steven Dickter, M.D.West Chester, PA 193821225105208
- Ariella Jolly, CRNPWest Chester, PA 193821518331958
- Flora Leigh, MDWest Chester, PA 193821952546996
- George Spyropoulos, D.O.West Chester, PA 193821043258791
- Colin Turney, MDWest Chester, PA 193821598008856
- Amy Barry, CRNPWest Chester, PA 193801669209607
- Charles Catania, M.D.West Chester, PA 193801609037027
Common questions
What is Mark Jeffrey Decker, M.D.'s NPI number?
Mark Jeffrey Decker, M.D.'s National Provider Identifier (NPI) is 1407829070, issued on Feb 13, 2006. An NPI identifies a provider in billing; it is not a license.
Where is Mark Jeffrey Decker, M.D. located?
The NPPES record lists a practice address at 4 Sloan RD., West Chester, PA, 19382. Phone: (860) 871-0220. Providers update this record themselves, so call before visiting.
How can I verify Mark Jeffrey Decker, M.D.'s license?
NPPES lists Pennsylvania license number MD433213, as entered by the provider. Search the Pennsylvania Department of State (PALS) at https://www.pals.pa.gov/. The NPPES record confirms identity only; the state search shows license status, expiration and public orders.
How much does Mark Jeffrey Decker, M.D. prescribe under Medicare Part D?
In 2024, Mark Jeffrey Decker, M.D. had 35 Medicare Part D claims; the average among family medicine physician prescribers was 3,544. 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.