NPPES file of Aug 9, 2026

Guy A. O'Connor, M.D.

Emergency Medicine Physician · Manitowoc, WI

Guy A. O'Connor, M.D. is an emergency medicine physician with a practice address in Manitowoc, Wisconsin, and NPI 1144333519, issued on Aug 17, 2006. Check the license (Wisconsin 26328-020, as entered in NPPES) on the Wisconsin Medical Examining Board; the federal record below is the public data PlainDoctor holds for this provider.

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

NPPES recordNPPES file of Aug 9, 2026
1144333519
Name
Guy A. O'Connor
Credential
M.D.
Primary taxonomy
Emergency Medicine Physician 207P00000X
License number
26328-020 WI
Self-reported in NPPES; status is on the state search
Practice location
2300 Western Ave, Manitowoc, WI 54220
Phone
(920) 320-2011
Enumerated
Aug 17, 2006
Record last updated
Jun 29, 2011 (not updated in 15 years: call before relying on the address or phone)
Medicaid ID
34427400 WI
Entity
Type 1 · individual
Public record from CMS NPPES (open it on the CMS NPI Registry). A record is not a license: verify it with the state board.
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8 nearest emergency medicine physician records → All 1,464 in Wisconsin → Look up another NPI →

Also registered at 2300 Western Ave

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

  1. Daniel Abbott, M.D.Anatomic Pathology & Clinical Pathology Physician1467894873
  2. Khalid Abdelgadir, MDInternal Medicine Physician1407433295
  3. Debra Arrowood, MS CCC SLPSpeech-Language Pathologist1831174200
  4. Lynn BaatzMedical Oncology Physician1518070077
  5. Sandra Baatz, P.T.Physical Therapist1720283021
  6. Krishna Bhatt, M.D.Neurology Physician1679520332

Verify Guy A. O'Connor in five checks

  1. 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
  2. 2LicenseActive license and public ordersWisconsin Medical Examining Board
    Search for license 26328-020    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

PlainDoctor does not match the HHS-OIG exclusion list to individual records: most entries carry no NPI. Search the OIG exclusion list by name.

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Guy A. O'Connor among 1,464 emergency medicine physician records in Wisconsin

Guy A. O'Connor, M.D. is one of 1,464 emergency medicine physician records with a practice address in Wisconsin. 79% 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 2006, is newer than 8% of them.

  • NPI issued2006 · 8% of these records are older, 58% newer
  • In a Medicare fileNo · 79% of these records are
  • In the CMS Doctors and Clinicians fileNo · 58% of these records are
  • Record last updated2011 · 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 207P00000X and a Wisconsin practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).

Emergency Medicine Physician providers in Wisconsin

There are 1,464 emergency medicine physician records in Wisconsin. No Medicare prescribing, quality score, industry payment or hospital affiliation is published for this NPI.

All 1,464 in Wisconsin → Every provider in Manitowoc → Emergency Medicine Physician nationwide →

The 8 emergency medicine physician records with the nearest ZIP codes

  1. Steven Chilinski, MDManitowoc, WI 542201619116191
  2. Steven Driggers, M.D.Manitowoc, WI 542201821101379
  3. John Moustoukas, M.D.Manitowoc, WI 542201124317847
  4. James Murphy, MDManitowoc, WI 542201588643324
  5. Todd Nelson, M.D.Manitowoc, WI 542201144333501
  6. Steven Umhoefer, M.D.Manitowoc, WI 542201801909288
  7. Steven Stroman, MDEgg Harbor, WI 542091023039757
  8. Adam Alexander, D.O.Sturgeon Bay, WI 542351497250385

Common questions

What is Guy A. O'Connor, M.D.'s NPI number?

Guy A. O'Connor, M.D.'s National Provider Identifier (NPI) is 1144333519, issued on Aug 17, 2006. An NPI identifies a provider in billing; it is not a license.

Where is Guy A. O'Connor, M.D. located?

The NPPES record lists a practice address at 2300 Western Ave, Manitowoc, WI, 54220. Phone: (920) 320-2011. Providers update this record themselves, so call before visiting.

How can I verify Guy A. O'Connor, M.D.'s license?

NPPES lists Wisconsin license number 26328-020, 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.

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.

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.