NPPES file of Aug 9, 2026

Khalid S. Kahook, M.D.,

Retina Specialist (Ophthalmology) Physician · Neenah, WI

Khalid S. Kahook, M.D., is a retina specialist (ophthalmology) physician with a practice address in Neenah, Wisconsin, and NPI 1356640726, issued on Mar 24, 2011. Check the license (Wisconsin 6519320, 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
1356640726
Name
Khalid S. Kahook
Credential
M.D.,
Primary taxonomy
Retina Specialist (Ophthalmology) Physician 207WX0107X
License number
6519320 WI
Self-reported in NPPES; status is on the state search
Practice location
200 Theda Clark Plaza, Neenah, WI 54956
Phone
(920) 751-8666
Enumerated
Mar 24, 2011
Record last updated
Dec 11, 2017 (not updated in 9 years: call before relying on the address or phone)
Fax
(920) 751-0288
Medicare enrollment
Enrolled (PECOS I20160506000186); accepts Medicare assignment
Medical or professional school
Medical College Of Georgia School Of Medicine, 2011
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 retina specialist (ophthalmology) physician records → All 27 in Wisconsin → Look up another NPI →

Also registered at 200 Theda Clark Plaza

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

  1. Charles Hejny, MDRetina Specialist (Ophthalmology) Physician1922013671
  2. John Rosculet, MDRetina Specialist (Ophthalmology) Physician1679580070
  3. Martin Viebahn, MDOphthalmology Physician1164437802

Verify Khalid S. Kahook in five checks

  1. 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
  2. 2LicenseActive license and public ordersWisconsin Medical Examining Board
    Search for license 6519320    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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63% fewer Medicare Part D claims than the average retina specialist (ophthalmology) physician in 2024

232 Medicare Part D claims for 73 beneficiaries, against an average of 620 among the 1,449 providers of this specialty who prescribed in Part D. Brand-name drugs were 25% of claims.

  1. Khalid Kahook232
  2. Specialty average620

Most prescribed

  1. Dorzolamide-Timolol41 claims
  2. Prednisolone Acetate36 claims
  3. Latanoprost32 claims
  4. Brimonidine Tartrate30 claims
  5. Dorzolamide Hcl22 claims
  6. Difluprednate16 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: $62.81

3 payments; by number, the most common kind was food and beverage; the largest payer was Regeneron Healthcare Solutions, Inc. The 1,253 providers of this specialty with any payment received $7,667.49 on average. Payments are reported by manufacturers, not by the provider, and are not a sign of wrongdoing.

  1. Khalid Kahook$62.81
  2. Specialty average$7,667.49

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. Northeast Wisconsin Retina Associates SCAppleton, WI

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

Khalid S. Kahook among 27 retina specialist (ophthalmology) physician records in Wisconsin

Khalid S. Kahook, M.D., is one of 27 retina specialist (ophthalmology) physician records with a practice address in Wisconsin. 89% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2011, is newer than 52% of them.

  • NPI issued2011 · 52% of these records are older, 44% newer
  • In a Medicare fileYes · 89% of these records are
  • In the CMS Doctors and Clinicians fileYes · 85% of these records are
  • Graduated2011 · median 2011 among the 23 with a school on file
  • Record last updated2017 · 26% of these records were not updated in five years or more

Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 207WX0107X and a Wisconsin practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).

Retina Specialist (Ophthalmology) Physician providers in Wisconsin

There are 27 retina specialist (ophthalmology) physician records in Wisconsin.

All 27 in Wisconsin → Every provider in Neenah → Retina Specialist (Ophthalmology) Physician nationwide →

The 8 retina specialist (ophthalmology) physician records with the nearest ZIP codes

  1. Rajeev Buddi, MDNeenah, WI 549561700819281
  2. Charles Hejny, MDNeenah, WI 549561922013671
  3. John Rosculet, MDNeenah, WI 549561679580070
  4. Benjamin Ernst, M.D.Appleton, WI 549141518162247
  5. Anthony Parendo, M.D.Appleton, WI 549141043690233
  6. Michael Possin, M.D.Appleton, WI 549141811253289
  7. Sunday Olatunji, M.D.Eau Claire, WI 547031316131956
  8. Wayne Wu, MDEau Claire, WI 547011720015621

Common questions

What is Khalid S. Kahook, M.D.,'s NPI number?

Khalid S. Kahook, M.D.,'s National Provider Identifier (NPI) is 1356640726, issued on Mar 24, 2011. An NPI identifies a provider in billing; it is not a license.

Where is Khalid S. Kahook, M.D., located?

The NPPES record lists a practice address at 200 Theda Clark Plaza, Neenah, WI, 54956. Phone: (920) 751-8666. Providers update this record themselves, so call before visiting.

How can I verify Khalid S. Kahook, M.D.,'s license?

NPPES lists Wisconsin license number 6519320, 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 Khalid S. Kahook, M.D., prescribe under Medicare Part D?

In 2024, Khalid S. Kahook, M.D., had 232 Medicare Part D claims for 73 beneficiaries; the average among retina specialist (ophthalmology) physician prescribers was 620. 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.