Chester Irvin Clark, M.D.
Family Medicine Physician · Horsham, PA
Chester Irvin Clark, M.D. is a family medicine physician with a practice address in Horsham, Pennsylvania, and NPI 1336437276, issued on Jul 13, 2011. Check the license (Pennsylvania MT200648, as entered in NPPES) on the Pennsylvania Department of State (PALS); the federal record below is the public data PlainDoctor holds for this provider.
- Name
- Chester Irvin Clark
- Credential
- M.D.
- Primary taxonomy
- Family Medicine Physician 207Q00000X
- License number
- MT200648 PA
Self-reported in NPPES; status is on the state search - Practice location
- 157 Upland Ave, Horsham, PA 19044
- Phone
- (423) 967-9416
- Enumerated
- Jul 13, 2011
- Record last updated
- Jul 13, 2011 (not updated in 15 years: call before relying on the address or phone)
- Entity
- Type 1 · individual
8 nearest family medicine physician records → All 7,483 in Pennsylvania → Look up another NPI →
Verify Chester Irvin Clark in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersPennsylvania Department of State (PALS)
Search for license MT200648Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
Chester Irvin Clark among 7,483 family medicine physician records in Pennsylvania
Chester Irvin Clark, 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 not. Its NPI, issued in 2011, is newer than 62% of them.
- NPI issued2011 · 62% of these records are older, 36% newer
- In a Medicare fileNo · 79% of these records are
- In the CMS Doctors and Clinicians fileNo · 61% of these records are
- Record last updated2011 · 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).
8 family medicine physician records list a practice address in Horsham
They are 8 of the 505 NPPES records with a practice address in Horsham, and 7,483 family medicine physician records in Pennsylvania. No Medicare prescribing, quality score, industry payment or hospital affiliation is published for this NPI.
All 7,483 in Pennsylvania → Every provider in Horsham → Family Medicine Physician nationwide →
The 8 family medicine physician records with the nearest ZIP codes
- Richard Buckwalter, MDHorsham, PA 190441104869874
- Harris Cohen, M.D.Horsham, PA 190441801887856
- Lisa Miller, DOHorsham, PA 190441215978200
- Michael Moriarty, D.OHorsham, PA 190441881075372
- Inna Pendrak, D.O.Horsham, PA 190441871812875
- Matthew Proodian, DOHorsham, PA 190441528745015
- Susan Sabol, D.O.Horsham, PA 190441558611210
- Jay Grossman, DOJenkintown, PA 190461588660021
Common questions
What is Chester Irvin Clark, M.D.'s NPI number?
Chester Irvin Clark, M.D.'s National Provider Identifier (NPI) is 1336437276, issued on Jul 13, 2011. An NPI identifies a provider in billing; it is not a license.
Where is Chester Irvin Clark, M.D. located?
The NPPES record lists a practice address at 157 Upland Ave, Horsham, PA, 19044. Phone: (423) 967-9416. Providers update this record themselves, so call before visiting.
How can I verify Chester Irvin Clark, M.D.'s license?
NPPES lists Pennsylvania license number MT200648, 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.
Source: CMS National Plan and Provider Enumeration System (NPPES), file of Aug 9, 2026 (NPPES files on CMS.gov); NUCC Health Care Provider Taxonomy. 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.