Pennapa S. Chan, MD
Endocrinology, Diabetes & Metabolism Physician · Madison, WI
Pennapa S. Chan, MD is an endocrinology, diabetes & metabolism physician with a practice address in Madison, Wisconsin, and NPI 1457405128, issued on Jan 22, 2007. Check the license (Wisconsin 41501-020, as entered in NPPES) on the Wisconsin Medical Examining Board; the Medicare figures below come from public CMS files.
- Name
- Pennapa S. Chan
- Credential
- MD
- Primary taxonomy
- Endocrinology, Diabetes & Metabolism Physician 207RE0101X
- License numbers
- 41501-020 WI
MD212597 OR
Self-reported in NPPES; status is on the state search - Practice location
- 451 Junction RD, Madison, WI 53717
- Phone
- (608) 263-5010
- Enumerated
- Jan 22, 2007
- Record last updated
- Dec 16, 2024
- Fax
- (608) 265-7519
- Medicaid ID
- 34390100 WI
- Medicare enrollment
- Enrolled (PECOS I20040422001154); accepts Medicare assignment
- Medical or professional school
- Southern Illinois University School Of Medicine, 1998
- Telehealth
- Offers telehealth (CMS)
- Entity
- Type 1 · individual
8 nearest endocrinology, diabetes & metabolism physician records → All 187 in Wisconsin → Look up another NPI →
Also registered at 451 Junction RD
A shared address usually means a shared clinic or building; it does not show who employs whom.
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- William Aughenbaugh, MDDermatology Physician1033178272
Verify Pennapa S. Chan in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersWisconsin Medical Examining Board
Search for license 41501-020Check 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 endocrinology, diabetes & metabolism physician in 2024
393 Medicare Part D claims for 81 beneficiaries, against an average of 2,630 among the 8,223 providers of this specialty who prescribed in Part D. Brand-name drugs were 47% of claims.
Most prescribed
- Levothyroxine Sodium78 claims
- Ozempic23 claims
- Methimazole17 claims
- Nano 2nd Gen Pen Needle17 claims
- Synthroid16 claims
- Metformin Hcl Er15 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.
Bills Medicare through one group practice
- University OF Wisconsin Medical Foundation IncMadison, WI
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Pennapa S. Chan among 187 endocrinology, diabetes & metabolism physician records in Wisconsin
Pennapa S. Chan, MD is one of 187 endocrinology, diabetes & metabolism physician records with a practice address in Wisconsin. 81% 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 45% of them.
- NPI issued2007 · 45% of these records are older, 48% newer
- In a Medicare fileYes · 81% of these records are
- In the CMS Doctors and Clinicians fileYes · 72% of these records are
- Graduated1998 · median 2003 among the 134 with a school on file
- Record last updated2024 · 48% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 207RE0101X and a Wisconsin practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
Endocrinology, Diabetes & Metabolism Physician providers in Wisconsin
There are 187 endocrinology, diabetes & metabolism physician records in Wisconsin.
All 187 in Wisconsin → Every provider in Madison → Endocrinology, Diabetes & Metabolism Physician nationwide →
The 8 endocrinology, diabetes & metabolism physician records with the nearest ZIP codes
- Neil Binkley, MDMadison, WI 537171659348241
- Mary Bruskewitz, CNS APNMadison, WI 537171588631261
- Bjoern Buehring, M.D.Madison, WI 537171083779045
- Vincent Cryns, M.D.Madison, WI 537171639235039
- Gihan Dawood, DOMadison, WI 537171255489746
- Russell Dixon, MDMadison, WI 537171457328189
- Marc Drezner, MDMadison, WI 537171326015058
- Diane Elson, MDMadison, WI 537171255308987
Common questions
What is Pennapa S. Chan, MD's NPI number?
Pennapa S. Chan, MD's National Provider Identifier (NPI) is 1457405128, issued on Jan 22, 2007. An NPI identifies a provider in billing; it is not a license.
Where is Pennapa S. Chan, MD located?
The NPPES record lists a practice address at 451 Junction RD, Madison, WI, 53717. Phone: (608) 263-5010. Providers update this record themselves, so call before visiting.
How can I verify Pennapa S. Chan, MD's license?
NPPES lists Wisconsin license number 41501-020, 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 Pennapa S. Chan, MD prescribe under Medicare Part D?
In 2024, Pennapa S. Chan, MD had 393 Medicare Part D claims for 81 beneficiaries; the average among endocrinology, diabetes & metabolism physician prescribers was 2,630. 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.