Alan L. Detwiler, MD
Internal Medicine Physician · Watertown, WI
Alan L. Detwiler, MD is an internal medicine physician with a practice address in Watertown, Wisconsin, and NPI 1871597211, issued on Jun 13, 2005. Check the license (Wisconsin 20862, as entered in NPPES) on the Wisconsin Medical Examining Board; the federal record below is the public data PlainDoctor holds for this provider.
- Name
- Alan L. Detwiler
- Credential
- MD
- Primary taxonomy
- Internal Medicine Physician 207R00000X
- License number
- 20862 WI
Self-reported in NPPES; status is on the state search - Practice location
- 125 Hospital Dr, Watertown, WI 53098
- Phone
- (920) 262-4210
- Enumerated
- Jun 13, 2005
- Record last updated
- Oct 29, 2015 (not updated in 11 years: call before relying on the address or phone)
- Entity
- Type 1 · individual
8 nearest internal medicine physician records → All 2,078 in Wisconsin → Look up another NPI →
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A shared address usually means a shared clinic or building; it does not show who employs whom.
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Verify Alan L. Detwiler in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersWisconsin Medical Examining Board
Search for license 20862Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
Alan L. Detwiler among 2,078 internal medicine physician records in Wisconsin
Alan L. Detwiler, MD 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 not. Its NPI, issued in 2005, is newer than 0% of them.
- NPI issued2005 · 0% of these records are older, 91% newer
- In a Medicare fileNo · 70% of these records are
- In the CMS Doctors and Clinicians fileNo · 53% of these records are
- Record last updated2015 · 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).
Internal Medicine Physician providers in Wisconsin
There are 2,078 internal medicine physician records in Wisconsin. No Medicare prescribing, quality score, industry payment or hospital affiliation is published for this NPI.
All 2,078 in Wisconsin → Every provider in Watertown → Internal Medicine Physician nationwide →
The 8 internal medicine physician records with the nearest ZIP codes
- Zachary Richardson, MDWatertown, WI 530981437544863
- Mohamed Yafai, MDWatertown, WI 530981730156431
- Deidre Faust, MDMequon, WI 530971154372092
- David Goldberg, MDMequon, WI 530971285792127
- Scott Jorgensen, M.D.Mequon, WI 530971184654725
- David Lucke, M.D.Mequon, WI 530971477580686
- George Munkwitz, M.D.Mequon, WI 530971073750238
- Rachel Oosterbaan-Panarese, M.D.Mequon, WI 530971588690986
Common questions
What is Alan L. Detwiler, MD's NPI number?
Alan L. Detwiler, MD's National Provider Identifier (NPI) is 1871597211, issued on Jun 13, 2005. An NPI identifies a provider in billing; it is not a license.
Where is Alan L. Detwiler, MD located?
The NPPES record lists a practice address at 125 Hospital Dr, Watertown, WI, 53098. Phone: (920) 262-4210. Providers update this record themselves, so call before visiting.
How can I verify Alan L. Detwiler, MD's license?
NPPES lists Wisconsin license number 20862, 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.
Source: CMS National Plan and Provider Enumeration System (NPPES), file of Aug 9, 2026 (NPPES files on CMS.gov); NUCC Health Care Provider Taxonomy. 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.