NPPES file of Aug 9, 2026

Gregory James Horwitz, M.D.

Urology Physician · North Kansas City, MO

Gregory James Horwitz, M.D. is a urology physician with a practice address in North Kansas City, Missouri, and NPI 1689798613, issued on Mar 16, 2007. Check the license (Missouri 2008004272, as entered in NPPES) on the Missouri Board of Registration for the Healing Arts; 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
1689798613
Name
Gregory James Horwitz
Credential
M.D.
Primary taxonomy
Urology Physician 208800000X
License numbers
2008004272 MO
33000 KS
Self-reported in NPPES; status is on the state search
Practice location
1950 Diamond Pkwy Ste 200, North Kansas City, MO 64116
Phone
(816) 842-6717
Enumerated
Mar 16, 2007
Record last updated
Apr 12, 2021 (not updated in 5 years: call before relying on the address or phone)
Medicare enrollment
Enrolled (PECOS I20090209000254); accepts Medicare assignment
Medical or professional school
University Of Wisconsin School Of Medicine, 2003
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 urology physician records → All 266 in Missouri → Look up another NPI →

Also registered at 1950 Diamond Pkwy Ste 200

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

  1. Courtney Hinson, PAPhysician Assistant1609225812
  2. Alisha Jones, PA-CPhysician Assistant1467081034
  3. Brandan Kramer, M.D.Urology Physician1639391055
  4. Gerald Park, MDUrology Physician1841241387
  5. Ashlyn SmithFamily Nurse Practitioner1093647661
  6. Abby Spexarth, PAPhysician Assistant1508489089

Verify Gregory James Horwitz in five checks

  1. 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
  2. 2LicenseActive license and public ordersMissouri Board of Registration for the Healing Arts
    Search for license 2008004272    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 Missouri license search

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94% more Medicare Part D claims than the average urology physician in 2024

2,605 Medicare Part D claims for 573 beneficiaries, against an average of 1,340 among the 10,782 providers of this specialty who prescribed in Part D. 74 claims were for opioids.

  1. Gregory Horwitz2,605
  2. Specialty average1,340

Most prescribed

  1. Tamsulosin Hcl784 claims
  2. Myrbetriq248 claims
  3. Dutasteride224 claims
  4. Solifenacin Succinate187 claims
  5. Finasteride162 claims
  6. Gemtesa155 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: $653.18

32 payments; by number, the most common kind was food and beverage; the largest payer was Procept BioRobotics Corporation. The 9,340 providers of this specialty with any payment received $3,800.04 on average. Payments are reported by manufacturers, not by the provider, and are not a sign of wrongdoing.

  1. Gregory Horwitz$653.18
  2. Specialty average$3,800.04

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. Kansas City Urology Care PAOverland Park, KS

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

Gregory James Horwitz among 266 urology physician records in Missouri

Gregory James Horwitz, M.D. is one of 266 urology physician records with a practice address in Missouri. 85% 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 50% of them.

  • NPI issued2007 · 50% of these records are older, 41% newer
  • In a Medicare fileYes · 85% of these records are
  • In the CMS Doctors and Clinicians fileYes · 68% of these records are
  • Graduated2003 · median 2004 among the 182 with a school on file
  • Record last updated2021 · 47% of these records were not updated in five years or more

Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 208800000X and a Missouri practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).

Urology Physician providers in Missouri

There are 266 urology physician records in Missouri.

All 266 in Missouri → Every provider in North Kansas City → Urology Physician nationwide →

The 8 urology physician records with the nearest ZIP codes

  1. Thomas Herrick, MDNorth Kansas City, MO 641161487605275
  2. Brandan Kramer, M.D.North Kansas City, MO 641161639391055
  3. John Mitchell, M.D.N Kansas City, MO 641161821076647
  4. Gerald Park, MDNorth Kansas City, MO 641161841241387
  5. Patrick Probst, M.D.Kansas City, MO 641161619331220
  6. Dane Stephens, MDKansas City, MO 641161821618877
  7. Keegan Zuk, M.D.North Kansas City, MO 641161427444678
  8. James Bergant, MDKansas City, MO 641141255380754

Common questions

What is Gregory James Horwitz, M.D.'s NPI number?

Gregory James Horwitz, M.D.'s National Provider Identifier (NPI) is 1689798613, issued on Mar 16, 2007. An NPI identifies a provider in billing; it is not a license.

Where is Gregory James Horwitz, M.D. located?

The NPPES record lists a practice address at 1950 Diamond Pkwy Ste 200, North Kansas City, MO, 64116. Phone: (816) 842-6717. Providers update this record themselves, so call before visiting.

How can I verify Gregory James Horwitz, M.D.'s license?

NPPES lists Missouri license number 2008004272, as entered by the provider. Search the Missouri Board of Registration for the Healing Arts at https://www.fsmb.org/contact-a-state-medical-board/. The NPPES record confirms identity only; the state search shows license status, expiration and public orders.

How much does Gregory James Horwitz, M.D. prescribe under Medicare Part D?

In 2024, Gregory James Horwitz, M.D. had 2,605 Medicare Part D claims for 573 beneficiaries; the average among urology physician prescribers was 1,340. 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.