Jack C. Chang, MD
Internal Medicine Physician · Lowell, MA
Jack C. Chang, MD is an internal medicine physician with a practice address in Lowell, Massachusetts, and NPI 1811182041, issued on Sep 11, 2007. Check the license (Massachusetts 74694, as entered in NPPES) on the Massachusetts Board of Registration in Medicine; the Medicare figures below come from public CMS files.
- Name
- Jack C. Chang
- Credential
- MD
- Primary taxonomy
- Internal Medicine Physician 207R00000X
- License number
- 74694 MA
Self-reported in NPPES; status is on the state search - Practice location
- 706 Rogers St, Lowell, MA 01852
- Phone
- (978) 937-9333
- Enumerated
- Sep 11, 2007
- Record last updated
- Nov 26, 2007 (not updated in 19 years: call before relying on the address or phone)
- Fax
- (978) 937-9992
- Medicaid ID
- 3103391 MA
- Medicare enrollment
- Enrolled (PECOS I20071121000037); accepts Medicare assignment
- Entity
- Type 1 · individual
8 nearest internal medicine physician records → All 6,825 in Massachusetts → Look up another NPI →
Also registered at 706 Rogers St
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Mary Trahan, MSN, APRN, AGPCNP-BCAdult Health Nurse Practitioner1053994558
Verify Jack C. Chang in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMassachusetts Board of Registration in Medicine
Search for license 74694Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
2.1 times the Medicare Part D claims of the average internal medicine physician in 2024
6,709 Medicare Part D claims for 371 beneficiaries, against an average of 3,176 among the 108,855 providers of this specialty who prescribed in Part D. Brand-name drugs were 15% of claims. 171 claims were for opioids.
Most prescribed
- Rosuvastatin Calcium609 claims
- Lisinopril295 claims
- Amlodipine Besylate271 claims
- Atorvastatin Calcium226 claims
- Metformin Hcl210 claims
- Levothyroxine Sodium207 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: $51.49
3 payments; by number, the most common kind was food and beverage; the largest payer was GlaxoSmithKline, LLC. The 50,334 providers of this specialty with any payment received $1,303.06 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.
Jack C. Chang among 6,825 internal medicine physician records in Massachusetts
Jack C. Chang, MD is one of 6,825 internal medicine physician records with a practice address in Massachusetts. 75% 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 46% of them.
- NPI issued2007 · 46% of these records are older, 45% newer
- In a Medicare fileYes · 75% of these records are
- In the CMS Doctors and Clinicians fileYes · 60% of these records are
- Graduated1984 · median 2004 among the 4,103 with a school on file
- Record last updated2007 · 64% 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 Massachusetts practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
57 internal medicine physician records list a practice address in Lowell
They are 57 of the 2,992 NPPES records with a practice address in Lowell, and 6,825 internal medicine physician records in Massachusetts.
All 6,825 in Massachusetts → Every provider in Lowell → Internal Medicine Physician nationwide →
The 8 internal medicine physician records with the nearest ZIP codes
- Zaheer Ahmed, M.D.Lowell, MA 018521346289337
- Margaret Allard, MD MPHLowell, MA 018521528024585
- Alexandra Argasinski, M.D.Lowell, MA 018521508813395
- Peter Bradshaw, M.D.Lowell, MA 018521083770903
- Mariana Chemaly, MDLowell, MA 018521811183056
- Shabnam Cheriyath, MDLowell, MA 018521487980116
- Herbert Kleinman, M.D.Lowell, MA 018521396791125
- Meaghan Nitka, MDLowell, MA 018521952551376
Common questions
What is Jack C. Chang, MD's NPI number?
Jack C. Chang, MD's National Provider Identifier (NPI) is 1811182041, issued on Sep 11, 2007. An NPI identifies a provider in billing; it is not a license.
Where is Jack C. Chang, MD located?
The NPPES record lists a practice address at 706 Rogers St, Lowell, MA, 01852. Phone: (978) 937-9333. Providers update this record themselves, so call before visiting.
How can I verify Jack C. Chang, MD's license?
NPPES lists Massachusetts license number 74694, as entered by the provider. Search the Massachusetts Board of Registration in Medicine at https://findmydoctor.mass.gov/. The NPPES record confirms identity only; the state search shows license status, expiration and public orders.
How much does Jack C. Chang, MD prescribe under Medicare Part D?
In 2024, Jack C. Chang, MD had 6,709 Medicare Part D claims for 371 beneficiaries; 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.