NPPES file of Aug 9, 2026

Ian R. Powell, M.D.

Addiction Medicine (Internal Medicine) Physician · Oconomowoc, WI

Ian R. Powell, M.D. is an addiction medicine (internal medicine) physician with a practice address in Oconomowoc, Wisconsin, and NPI 1346212545, issued on Feb 2, 2006. Check the license (Wisconsin 39133, as entered in NPPES) on the Wisconsin Medical Examining Board; the Medicare figures below come from public CMS files.

Record from CMS NPPES, file of Aug 9, 2026 · Medicare files 2024 · method · Verify with CMS →

NPPES recordNPPES file of Aug 9, 2026
1346212545
Name
Ian R. Powell
Credential
M.D.
Primary taxonomy
Addiction Medicine (Internal Medicine) Physician 207RA0401X
License number
39133 WI
Self-reported in NPPES; status is on the state search
Practice location
34700 Valley RD, Oconomowoc, WI 53066
Phone
(262) 646-1391
Enumerated
Feb 2, 2006
Record last updated
Oct 20, 2012 (not updated in 14 years: call before relying on the address or phone)
Fax
(262) 646-1393
Medicaid ID
32580600 WI
Medicare enrollment
Enrolled (PECOS I20211005003208); accepts Medicare assignment
Telehealth
Offers telehealth (CMS)
Entity
Type 1 · individual
Public record from CMS NPPES (open it on the CMS NPI Registry). Enrollment, assignment, school and telehealth: CMS Doctors and Clinicians file, Aug 2026. A record is not a license: verify it with the state board.
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8 nearest addiction medicine (internal medicine) physician records → All 16 in Wisconsin → Look up another NPI →

Also registered at 34700 Valley RD

A shared address usually means a shared clinic or building; it does not show who employs whom.

  1. Kiah Allen, APNPPsychiatric/Mental Health Nurse Practitioner1508477142
  2. Heidi BegovatzAddiction (Substance Use Disorder) Counselor1710853551
  3. Michelle Bensen, MDAddiction Medicine (Internal Medicine) Physician1821193491
  4. Melissa Bock, PMHNPPsychiatric/Mental Health Nurse Practitioner1639043094
  5. Andrew Butchart, D.O.Child & Adolescent Psychiatry Physician1245318229
  6. Beth Calvert, APNPPsychiatric/Mental Health Nurse Practitioner1477183069

Verify Ian R. Powell in five checks

  1. 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
  2. 2LicenseActive license and public ordersWisconsin Medical Examining Board
    Search for license 39133    Check the board
  3. 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
  4. 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
  5. 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
Open the Wisconsin license search

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83% fewer Medicare Part D claims than the average addiction medicine (internal medicine) physician in 2024

138 Medicare Part D claims for 14 beneficiaries, against an average of 829 among the 401 providers of this specialty who prescribed in Part D.

  1. Ian Powell138
  2. Specialty average829

Most prescribed

  1. Buprenorphine-Naloxone41 claims
  2. Quetiapine Fumarate15 claims
  3. Venlafaxine Hcl Er15 claims
  4. Buprenorphine Hcl12 claims
  5. Zolpidem Tartrate12 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: $37.82

1 payment: food and beverage; the largest payer was Ironshore Pharmaceuticals Inc. The 188 providers of this specialty with any payment received $1,761.64 on average. Payments are reported by manufacturers, not by the provider, and are not a sign of wrongdoing.

  1. Ian Powell$37.82
  2. Specialty average$1,761.64

Source: CMS Open Payments, program year 2024 (openpaymentsdata.cms.gov); average among providers of this specialty with at least one payment.

Bills Medicare through one group practice

  1. Rosecrance IncRockford, IL

Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).

Ian R. Powell among 16 addiction medicine (internal medicine) physician records in Wisconsin

Ian R. Powell, M.D. is one of 16 addiction medicine (internal medicine) physician records with a practice address in Wisconsin. 56% 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 13% of them.

  • NPI issued2006 · 13% of these records are older, 31% newer
  • In a Medicare fileYes · 56% of these records are
  • In the CMS Doctors and Clinicians fileYes · 56% of these records are
  • Record last updated2012 · 50% of these records were not updated in five years or more

Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 207RA0401X and a Wisconsin practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).

Addiction Medicine (Internal Medicine) Physician providers in Wisconsin

There are 16 addiction medicine (internal medicine) physician records in Wisconsin.

All 16 in Wisconsin → Every provider in Oconomowoc → Addiction Medicine (Internal Medicine) Physician nationwide →

The 8 addiction medicine (internal medicine) physician records with the nearest ZIP codes

  1. Michelle Bensen, MDOconomowoc, WI 530661821193491
  2. Catherine Best, MDHowards Grove, WI 530831205845948
  3. Siamak Arassi, MDBrookfield, WI 530451083680417
  4. Julie Chicks, M.D.Grafton, WI 530241265482830
  5. Charles Engel, MDWaukesha, WI 531881649484205
  6. Michael Goldstone, MDWaukesha, WI 531881851505416
  7. Milind Mehta, M.D.Wauwatosa, WI 532131174890792
  8. Masroor Munim, MDWest Allis, WI 532141326048976

Common questions

What is Ian R. Powell, M.D.'s NPI number?

Ian R. Powell, M.D.'s National Provider Identifier (NPI) is 1346212545, issued on Feb 2, 2006. An NPI identifies a provider in billing; it is not a license.

Where is Ian R. Powell, M.D. located?

The NPPES record lists a practice address at 34700 Valley RD, Oconomowoc, WI, 53066. Phone: (262) 646-1391. Providers update this record themselves, so call before visiting.

How can I verify Ian R. Powell, M.D.'s license?

NPPES lists Wisconsin license number 39133, 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 Ian R. Powell, M.D. prescribe under Medicare Part D?

In 2024, Ian R. Powell, M.D. had 138 Medicare Part D claims for 14 beneficiaries; the average among addiction medicine (internal medicine) physician prescribers was 829. 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.

Written with AI tools from the named public files; every figure is computed from those files (how it is made).

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.