Dr. Gregory James Horwitz, MD
- Medicare services, 2024
- 4,411
- Medicare patients, 2024
- 823
- Part D claims, 2024
- 2,605
- Hospital affiliations
- 6
- Industry payments
- $8,218
- Practice address
- 2525 Glenn Hendren Dr, Liberty, MO 64068
- Practice phone
- Call (816) 781-7200
- Professional email
- Get professional email
- Personal email
- Get personal email
- Mobile number
- Get mobile number
Primary practice
Find Dr. Horwitz's professional email, personal email and mobile number
Dmand AI checks each channel through healthcare-specific waterfall enrichment. See what is on file with a free account, with practice phones, licenses and affiliations.
Dr. Gregory James Horwitz is a urologist in Liberty, Missouri
Dr. Horwitz practices at Liberty Hospital in Liberty, Missouri, part of The University of Kansas Health System.
Dr. Horwitz's NPI, 1689798613, was assigned on March 16, 2007. Dr. Horwitz graduated from University of Wisconsin School of Medicine in 2003. Dr. Horwitz holds Missouri license 2008004272.
- NPI
- 1689798613NPI Registry (opens in a new tab)
- Medicare PAC ID
- 0446311013
- NPI enumeration date
- March 16, 2007
- NPI status
- Active
- Accepts Medicare assignment
- Yes
- Practice phone
- (816) 781-7200
- Professional email
- Get email
- Personal email
- Get email
- Mobile number
- Get number
- Sex
- Male
- Estimated age
- 49
- Medical school graduation
- 2003
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; Dmand AI Affiliation Data; and Doctors and Clinicians National Downloadable File (CMS)
Dr. Gregory James Horwitz practices at Liberty Hospital in Liberty, Missouri
Dr. Horwitz's primary practice is Liberty Hospital, at 2525 Glenn Hendren Dr, Liberty, MO 64068 in Clay County. The practice phone is (816) 781-7200.
- Liberty Hospital2525 Glenn Hendren Dr, Liberty, MO 64068 · Clay CountyPhone(816) 781-7200
Source: Dmand AI Affiliation Data
Dr. Gregory James Horwitz is affiliated with 7 sites of care and 2 medical groups
Dr. Horwitz's primary practice is Liberty Hospital in Liberty, Missouri, part of The University of Kansas Health System. Dr. Horwitz is also affiliated with Saint Luke's Hospital of Kansas City. The medical group on file is Kansas City Urology Care. Dmand AI also links Dr. Horwitz to 4 more hospitals, 1 group practice or clinic and 1 medical group, each named with a free account.
Sources: Dmand AI Affiliation Data; and Dmand AI Org Hierarchy Data
Dmand AI tracks the EHR system at Dr. Gregory James Horwitz's practice
Dmand AI tracks the electronic health record (EHR) system at each site where Dr. Horwitz practices, 7 sites in all. Vendor and product names are available with a free account.
| Site | EHR vendor and product |
|---|---|
| Liberty Hospital | Available with a free account |
| +6 more sites and 1 medical group | Available with a free account |
Source: Dmand AI Technology Install Data
For health IT teams
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Dr. Gregory James Horwitz is one of 246 urologists in Missouri
Urology is Dr. Horwitz's primary specialty in the NPI Registry, under taxonomy code 208800000X. Dmand AI has Dr. Horwitz's licenses on file in 2 states: Missouri and Kansas.
Specialties and state licenses
- Urology, MissouriPrimary
- Kansas license
Urologists near Dr. Horwitz
Counts of urologists with a Dmand AI profile, by place and practice. Each opens the list.
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; and Dmand AI Peer Benchmarks
Dr. Gregory James Horwitz billed Medicare for 4,411 services in 2024
CMS data shows 4,411 Medicare services from Dr. Horwitz across 31 procedure codes in 2024, for 823 Medicare patients. Medicare paid $171,491 for them.
Dr. Horwitz's Medicare services by type, 2023 to 2024
- 2023
- 2024
- Surgery
- 2023: 1,4302024: 1,3923%
- Office and hospital visits
- 2023: 7842024: 1,20253%
- Drugs given in the office
- 2023: 552024: 9161565%
- Lab and pathology
- 2023: 5542024: 5098%
- Other services
- 2023: 02024: 338
- Imaging
- 2023: 342024: 5459%
Where Dr. Horwitz's Medicare services took place, 2024
- In an office4,34398%
- In a facility682%
Dr. Horwitz compared with the Missouri median for urologists, 2024
- Dr. Horwitz
- Missouri median
- Medicare services
- 4,411vs 1,5342.9 times
- Medicare patients
- 823vs 50065% above
- Part D claims
- 2,454vs 7993.1 times
Medians across 252 urologists in Missouri with Dmand AI profiles that report each measure.
Dr. Horwitz's most billed Medicare procedure codes, 2024
CMS publishes codes billed for 11 or more Medicare patients. Each label is the code family; CPT descriptions are licensed by the AMA.
Need commercial claims for Dr. Horwitz?
Medicare shows one payer. Book a meeting to get commercial claims data for Dr. Horwitz and other urologists in Missouri.
Sources: Medicare Physician & Other Practitioners - by Provider and Service (CMS), 2024 data; and Dmand AI Peer Benchmarks
Dr. Gregory James Horwitz treated 823 Medicare patients in 2024, average age 74
CMS counts 823 Medicare patients who saw Dr. Horwitz in 2024. The largest group is 65 to 74, with 400 patients. 75% of them have high blood pressure, and 75% have high cholesterol. 4% are also on Medicaid. Their average risk score is 1.38, where 1.00 is the Medicare average.
Across all payers, Dmand AI patient panel data puts Dr. Horwitz's median patient age at 70, with 23% women.
Dr. Horwitz's Medicare patients by age, 2024
Dr. Horwitz's Medicare patients by sex, 2024
- Women14718%
- Men67682%
Chronic conditions among Dr. Horwitz's Medicare patients, 2024
- High blood pressure75%
- High cholesterol75%
- Arthritis42%
- Cancer39%
- Ischemic heart disease34%
- Diabetes32%
- Chronic kidney disease28%
- Atrial fibrillation22%
Share of Medicare patients with each condition. A patient can have several.
Dr. Horwitz's patients across all payers
Dmand AI patient panel data covers Medicare, Medicaid and commercial patients.
Patient panel by age, all payers
Median age 70
Patient panel by sex, all payers
- Women23%
- Men77%
Sources: Dmand AI Patient Panel Data; and Medicare Physician & Other Practitioners - by Provider (CMS), 2024 data
Dr. Gregory James Horwitz wrote 2,605 Medicare Part D claims in 2024
In 2024, Dr. Horwitz wrote 2,605 Medicare Part D claims for 573 patients. 83% of them were for generic drugs. CMS names the drug for 2,454 of them, across 24 drugs with 11 or more claims each, at $289,824 in total drug cost. In 2023, CMS named 2,305 claims across 27 drugs.
Dr. Horwitz's Part D claims by kind of drug, 2024
- Generic2,163 claims83%
- Brand-name and other442 claims17%
Dr. Horwitz's most prescribed drugs by claims, 2024
CMS names a drug when it has 11 or more claims. Share is of the claims for drugs CMS names.
Drug classes CMS tracks in Dr. Horwitz's Part D claims, 2024
- Opioids3%74 of 2,605 claims
- Antibiotics9%222 of 2,605 claims
Share of all Part D claims for each drug class CMS reports on. Classes with no claims are left out.
Part D claims for drugs CMS names, 2023 to 2024
- 2023
- 2024
- Claims for drugs CMS names
- 2023: 2,3052024: 2,4546%
Drugs named by CMS: 24 in 2024, 27 in 2023.
Sources: Medicare Part D Prescribers - by Provider and Drug (CMS), 2024 data, released May 6, 2026; and Medicare Part D Prescribers - by Provider (CMS), 2024 data
How Dr. Gregory James Horwitz takes part in Medicare
Dr. Horwitz accepts Medicare assignment, so Medicare's approved amount is taken as full payment.
- Accepts Medicare assignment
- Yes
Prostate resection: 1 to 10 procedures (CMS shows small counts as a range)
Removal of skin lesions: 1 to 10 procedures (CMS shows small counts as a range)
Removal of the uterus: 1 to 10 procedures (CMS shows small counts as a range)
Sources: Doctors and Clinicians National Downloadable File (CMS); and Doctors and Clinicians Utilization Data (CMS)
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Dr. Gregory James Horwitz received $8,218 in industry payments from 2016 to 2025
CMS Open Payments shows 451 general payments to Dr. Horwitz from 63 drug and device companies from 2016 to 2025. Food and beverage make up the largest share, 98% of the total. Astellas Pharma US Inc paid the most, $814.
General payments to Dr. Horwitz by program year, 2016 to 2025
General payments to Dr. Horwitz by kind, 2016 to 2025
- Food and beverage$8,04998%
- Education$1702%
Companies that paid Dr. Horwitz the most, 2016 to 2025
Share is of all general payments to this clinician.
Source: Open Payments (CMS), 2025 data, released July 7, 2026
Dr. Gregory James Horwitz graduated from University of Wisconsin School of Medicine
Dr. Horwitz graduated from University of Wisconsin School of Medicine in 2003.
- Medical school
Source: Dmand AI Professional Profile Data
Sources for Dr. Gregory James Horwitz's profile data
| Data on this page | Source |
|---|---|
| NPI, name, sex, specialty and licenses | NPPES NPI Registry (CMS) (opens in a new tab)Dmand AI Professional Profile Data |
| Practice locations and phone | Dmand AI Affiliation Data |
| Primary practice, affiliations and health system | Dmand AI Affiliation DataDmand AI Org Hierarchy Data |
| Medicare services and procedure codes | Medicare Physician & Other Practitioners - by Provider and Service (CMS) (opens in a new tab) |
| State medians for the same specialty | Dmand AI Peer Benchmarks |
| Medicare patients and the all-payer patient panel | Dmand AI Patient Panel DataMedicare Physician & Other Practitioners - by Provider (CMS) (opens in a new tab) |
| Part D prescribing | Medicare Part D Prescribers - by Provider and Drug (CMS) (opens in a new tab)Medicare Part D Prescribers - by Provider (CMS) (opens in a new tab) |
| MIPS scores, telehealth, assignment and procedure percentiles | Doctors and Clinicians National Downloadable File (CMS) (opens in a new tab)Doctors and Clinicians Utilization Data (CMS) (opens in a new tab) |
| Industry payments | Open Payments (CMS) (opens in a new tab) |
| Training, board certification and memberships | Dmand AI Professional Profile Data |
| EHR at each practice site | Dmand AI Technology Install Data |
| Similar physicians | Dmand AI Affiliation Data |
Data last refreshed October 2026Report an inaccuracyRemove my information
FAQ
Frequently asked questions about Dr. Gregory James Horwitz
Spotted something out of date? Email hello@dmand.ai and we will check the record. Contact details live in the free trial.
What is Dr. Gregory James Horwitz's NPI number?
Dr. Gregory James Horwitz's NPI number is 1689798613. It was assigned on March 16, 2007, and it is active in the NPI Registry.
What kind of doctor is Dr. Gregory James Horwitz?
Dr. Gregory James Horwitz is a urologist in Liberty, Missouri. The primary specialty in the NPI Registry is Urology Physician (taxonomy code 208800000X).
Where does Dr. Gregory James Horwitz practice?
Dr. Horwitz practices at 2525 Glenn Hendren Dr, Liberty, MO 64068. Dr. Horwitz's primary practice is Liberty Hospital in Liberty, Missouri, part of The University of Kansas Health System. Dmand AI also links Dr. Horwitz to 4 hospitals, 1 group practice or clinic and 1 medical group.
What is Dr. Gregory James Horwitz's office phone number?
The practice phone on file for Dr. Horwitz is (816) 781-7200.
What is Dr. Gregory James Horwitz's medical license number?
Dr. Horwitz holds Missouri license 2008004272, one of the licenses on file in 2 states.
Which states has Dr. Gregory James Horwitz been licensed in?
Dmand AI has state licenses on file for Dr. Horwitz in Missouri and Kansas.
Which hospitals is Dr. Gregory James Horwitz affiliated with?
Dr. Horwitz practices at Liberty Hospital in Liberty, Missouri. Dr. Horwitz is also affiliated with Saint Luke's Hospital of Kansas City. Dmand AI links Dr. Horwitz to 4 more hospitals.
What medical group is Dr. Gregory James Horwitz part of?
Dr. Horwitz is linked to Kansas City Urology Care. Dmand AI links Dr. Horwitz to 1 more medical group.
Does Dr. Gregory James Horwitz accept Medicare?
Yes. CMS data shows Dr. Horwitz billed Medicare for 4,411 services in 2024, and Dr. Horwitz accepts Medicare assignment.
How many Medicare patients does Dr. Gregory James Horwitz see?
CMS counts 823 Medicare patients who saw Dr. Horwitz in 2024, with an average age of 74.
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What services does Dr. Gregory James Horwitz bill to Medicare?
In 2024, Dr. Horwitz's most billed Medicare services were injected or infused drug (J2704), office visit, established patient (99214) and surgery: urinary system (51798).
Where did Dr. Gregory James Horwitz go to medical school?
Dr. Horwitz graduated from University of Wisconsin School of Medicine in 2003.
What drugs does Dr. Gregory James Horwitz prescribe most?
In 2024 Medicare Part D data, Dr. Horwitz's most prescribed drugs by claims were Tamsulosin HCl, Myrbetriq and Dutasteride.
Has Dr. Gregory James Horwitz received payments from drug or device companies?
CMS Open Payments shows $8,218 in general payments to Dr. Horwitz from 63 companies from 2016 to 2025. The largest total came from Astellas Pharma US Inc.
How long has Dr. Gregory James Horwitz been practicing?
Dr. Horwitz graduated from medical school in 2003, 23 years ago.
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