Kumkum Chattopadhyay, M.D.
Internal Medicine Physician · Milwaukee, WI
Kumkum Chattopadhyay, M.D. is an internal medicine physician with a practice address in Milwaukee, Wisconsin, and NPI 1275564536, issued on Jul 5, 2006. Check the license (Wisconsin 43804, as entered in NPPES) on the Wisconsin Medical Examining Board; the Medicare figures below come from public CMS files.
- Name
- Kumkum Chattopadhyay
- Credential
- M.D.
- Primary taxonomy
- Internal Medicine Physician 207R00000X
- License number
- 43804 WI
Self-reported in NPPES; status is on the state search - Practice location
- Vamc Milwaukee 5000 W National Ave, Milwaukee, WI 53295
- Phone
- (414) 384-2000
- Enumerated
- Jul 5, 2006
- Record last updated
- Nov 18, 2020 (not updated in 6 years: call before relying on the address or phone)
- Fax
- (414) 389-4185
- Medicaid ID
- 34158200 WI
- Entity
- Type 1 · individual
8 nearest internal medicine physician records → All 2,078 in Wisconsin → Look up another NPI →
Verify Kumkum Chattopadhyay in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersWisconsin Medical Examining Board
Search for license 43804Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
85% fewer Medicare Part D claims than the average internal medicine physician in 2024
462 Medicare Part D claims for 25 beneficiaries, against an average of 3,176 among the 108,855 providers of this specialty who prescribed in Part D. Brand-name drugs were 12% of claims.
Most prescribed
- Gabapentin25 claims
- Omeprazole22 claims
- Pantoprazole Sodium22 claims
- Amlodipine Besylate20 claims
- Atorvastatin Calcium20 claims
- Levothyroxine Sodium20 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.
Kumkum Chattopadhyay among 2,078 internal medicine physician records in Wisconsin
Kumkum Chattopadhyay, M.D. is one of 2,078 internal medicine physician records with a practice address in Wisconsin. 70% 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, 46% newer
- In a Medicare fileYes · 70% of these records are
- In the CMS Doctors and Clinicians fileNo · 53% of these records are
- Record last updated2020 · 55% 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 Wisconsin practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
382 internal medicine physician records list a practice address in Milwaukee
They are 382 of the 18,389 NPPES records with a practice address in Milwaukee, and 2,078 internal medicine physician records in Wisconsin.
All 2,078 in Wisconsin → Every provider in Milwaukee → Internal Medicine Physician nationwide →
The 8 internal medicine physician records with the nearest ZIP codes
- David Alexanian, M.D.Milwaukee, WI 532951700800505
- Michael Bonner, M.D.Milwaukee, WI 532951619911195
- Michael Erdmann, MDMilwaukee, WI 532951609894443
- Virginia Gennis, M.D.Milwaukee, WI 532951649292533
- Avery Hayes, M.D.Milwaukee, WI 532951033133418
- Margaret Holmes, MDMilwaukee, WI 532951427071901
- Jeffrey Jackson, MDMilwaukee, WI 532951659432607
- Gail Kallas, MDMilwaukee, WI 532951609894666
Common questions
What is Kumkum Chattopadhyay, M.D.'s NPI number?
Kumkum Chattopadhyay, M.D.'s National Provider Identifier (NPI) is 1275564536, issued on Jul 5, 2006. An NPI identifies a provider in billing; it is not a license.
Where is Kumkum Chattopadhyay, M.D. located?
The NPPES record lists a practice address at Vamc Milwaukee 5000 W National Ave, Milwaukee, WI, 53295. Phone: (414) 384-2000. Providers update this record themselves, so call before visiting.
How can I verify Kumkum Chattopadhyay, M.D.'s license?
NPPES lists Wisconsin license number 43804, as entered by the provider. Search the Wisconsin Medical Examining Board at https://dsps.wi.gov/Pages/BoardsCouncils/MEB/Default.aspx. The NPPES record confirms identity only; the state search shows license status, expiration and public orders.
How much does Kumkum Chattopadhyay, M.D. prescribe under Medicare Part D?
In 2024, Kumkum Chattopadhyay, M.D. had 462 Medicare Part D claims for 25 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.