Philip N. Zimmermann, M.D.
Internal Medicine Physician · Madison, WI
Philip N. Zimmermann, M.D. is an internal medicine physician with a practice address in Madison, Wisconsin, and NPI 1477783801, issued on Jul 20, 2009. Check the license (Wisconsin 55123, as entered in NPPES) on the Wisconsin Medical Examining Board; the Medicare figures below come from public CMS files.
- Name
- Philip N. Zimmermann
- Credential
- M.D.
- Primary taxonomy
- Internal Medicine Physician 207R00000X
- License number
- 55123 WI
Self-reported in NPPES; status is on the state search - Practice location
- 4510 Deerwood Dr, Madison, WI 53716
- Phone
- (608) 236-4284
- Enumerated
- Jul 20, 2009
- Record last updated
- May 3, 2024
- Entity
- Type 1 · individual
8 nearest internal medicine physician records → All 2,078 in Wisconsin → Look up another NPI →
Verify Philip N. Zimmermann in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersWisconsin Medical Examining Board
Search for license 55123Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
14% more Medicare Part D claims than the average internal medicine physician in 2024
3,615 Medicare Part D claims for 411 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. 83 claims were for opioids.
Most prescribed
- Atorvastatin Calcium205 claims
- Losartan Potassium151 claims
- Levothyroxine Sodium132 claims
- Amlodipine Besylate124 claims
- Lisinopril121 claims
- Carvedilol116 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.
Philip N. Zimmermann among 2,078 internal medicine physician records in Wisconsin
Philip N. Zimmermann, 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 2009, is newer than 63% of them.
- NPI issued2009 · 63% of these records are older, 35% newer
- In a Medicare fileYes · 70% of these records are
- In the CMS Doctors and Clinicians fileNo · 53% of these records are
- Record last updated2024 · 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).
417 internal medicine physician records list a practice address in Madison
They are 417 of the 15,014 NPPES records with a practice address in Madison, and 2,078 internal medicine physician records in Wisconsin.
All 2,078 in Wisconsin → Every provider in Madison → Internal Medicine Physician nationwide →
The 8 internal medicine physician records with the nearest ZIP codes
- Robert Alt, MDMadison, WI 537161578500872
- Richard Armstrong, MDMadison, WI 537161689774523
- Paul Beckfield, MDMadison, WI 537161184651218
- Deborah Boushea, MDMonona, WI 537161306813084
- Sanford Carimi, M.D.Monona, WI 537161497864003
- Christopher Cervantes, MDMadison, WI 537161063458362
- Amaad Chaudhry, M.DMadison, WI 537161568030310
- Robert Gilbert, MDMadison, WI 537161942249255
Common questions
What is Philip N. Zimmermann, M.D.'s NPI number?
Philip N. Zimmermann, M.D.'s National Provider Identifier (NPI) is 1477783801, issued on Jul 20, 2009. An NPI identifies a provider in billing; it is not a license.
Where is Philip N. Zimmermann, M.D. located?
The NPPES record lists a practice address at 4510 Deerwood Dr, Madison, WI, 53716. Phone: (608) 236-4284. Providers update this record themselves, so call before visiting.
How can I verify Philip N. Zimmermann, M.D.'s license?
NPPES lists Wisconsin license number 55123, 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 Philip N. Zimmermann, M.D. prescribe under Medicare Part D?
In 2024, Philip N. Zimmermann, M.D. had 3,615 Medicare Part D claims for 411 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.