Clayton W. Chang, M.D
Internal Medicine Physician · Pottstown, PA
Clayton W. Chang, M.D is an internal medicine physician with a practice address in Pottstown, Pennsylvania, and NPI 1346204328, issued on Apr 14, 2006. Check the license (Pennsylvania MD024824E, as entered in NPPES) on the Pennsylvania Department of State (PALS); the Medicare figures below come from public CMS files.
- Name
- Clayton W. Chang
- Credential
- M.D
- Primary taxonomy
- Internal Medicine Physician 207R00000X
- License number
- MD024824E PA
Self-reported in NPPES; status is on the state search - Practice location
- 933 N Charlotte St, Pottstown, PA 19464
- Phone
- (610) 323-6566
- Enumerated
- Apr 14, 2006
- Record last updated
- Sep 13, 2011 (not updated in 15 years: call before relying on the address or phone)
- Fax
- (610) 323-9267
- Entity
- Type 1 · individual
8 nearest internal medicine physician records → All 7,300 in Pennsylvania → Look up another NPI →
Also registered at 933 N Charlotte St
A shared address usually means a shared clinic or building; it does not show who employs whom.
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- Pouyan MaanyDentist1598094757
- William Metz, DMDDentist1649288499
- Robert Sansone, DDSDentist1811905664
Verify Clayton W. Chang in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersPennsylvania Department of State (PALS)
Search for license MD024824ECheck the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
100% fewer Medicare Part D claims than the average internal medicine physician in 2024
12 Medicare Part D claims, against an average of 3,176 among the 108,855 providers of this specialty who prescribed in Part D. Brand-name drugs were 0% of 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.
Clayton W. Chang among 7,300 internal medicine physician records in Pennsylvania
Clayton W. Chang, M.D is one of 7,300 internal medicine physician records with a practice address in Pennsylvania. 78% 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 9% of them.
- NPI issued2006 · 9% of these records are older, 64% newer
- In a Medicare fileYes · 78% of these records are
- In the CMS Doctors and Clinicians fileNo · 58% of these records are
- Record last updated2011 · 56% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 207R00000X and a Pennsylvania practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
24 internal medicine physician records list a practice address in Pottstown
They are 24 of the 2,064 NPPES records with a practice address in Pottstown, and 7,300 internal medicine physician records in Pennsylvania.
All 7,300 in Pennsylvania → Every provider in Pottstown → Internal Medicine Physician nationwide →
The 8 internal medicine physician records with the nearest ZIP codes
- Habib Bhatti, MDPottstown, PA 194641487071056
- Scott Drobnis, MDPottstown, PA 194641063774917
- Farah Elounais, MDPottstown, PA 194641760935852
- Nicole Heisman-Rifkin, DOStowe, PA 194641154301927
- Michael Popolow, MDPottstown, PA 194641922070697
- Manjula Raman, MDPottstown, PA 194641275533390
- Kennedy Sbat, DOPottstown, PA 194641740252402
- Nieta Shapiro, M.D.Pottstown, PA 194641639179120
Common questions
What is Clayton W. Chang, M.D's NPI number?
Clayton W. Chang, M.D's National Provider Identifier (NPI) is 1346204328, issued on Apr 14, 2006. An NPI identifies a provider in billing; it is not a license.
Where is Clayton W. Chang, M.D located?
The NPPES record lists a practice address at 933 N Charlotte St, Pottstown, PA, 19464. Phone: (610) 323-6566. Providers update this record themselves, so call before visiting.
How can I verify Clayton W. Chang, M.D's license?
NPPES lists Pennsylvania license number MD024824E, 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 Clayton W. Chang, M.D prescribe under Medicare Part D?
In 2024, Clayton W. Chang, M.D had 12 Medicare Part D claims; the average among internal medicine physician prescribers was 3,176. 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.