Gary Horewitz, PA
- Medicare patients, 2024
- 89
- Part D claims, 2024
- 20
- MIPS score, 2024
- 83
- Hospital affiliations
- 1
- Medical group
- 1
- Practice address
- 4940 Eastern Avenue, Baltimore, MD 21224
- Practice phone
- Call (410) 550-0123
- Professional email
- Get professional email
- Personal email
- Get personal email
- Mobile number
- Get mobile number
Primary practice
Find Gary Horewitz'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.
Gary Horewitz is a physician assistant in Baltimore, Maryland
Gary Horewitz practices at Johns Hopkins Bayview Medical Center in Baltimore, Maryland, part of Johns Hopkins Health System.
Gary Horewitz's NPI, 1427430875, was assigned on June 22, 2015. Gary Horewitz holds Maryland license C0005771.
- NPI
- 1427430875NPI Registry (opens in a new tab)
- Medicare PAC ID
- 8426367251
- NPI enumeration date
- June 22, 2015
- NPI status
- Active
- Practice phone
- (410) 550-0123
- Professional email
- Get email
- Personal email
- Get email
- Mobile number
- Get number
- Sex
- Male
- Estimated age
- 40
- Medical school graduation
- 2012
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; and Dmand AI Affiliation Data
Gary Horewitz practices at Johns Hopkins Bayview Medical Center in Baltimore, Maryland
Gary Horewitz's primary practice is Johns Hopkins Bayview Medical Center, at 4940 Eastern Avenue, Baltimore, MD 21224 in Baltimore City. The practice phone is (410) 550-0123.
- Johns Hopkins Bayview Medical Center4940 Eastern Avenue, Baltimore, MD 21224 · Baltimore CityPhone(410) 550-0123
Source: Dmand AI Affiliation Data
Gary Horewitz is affiliated with 1 site of care and 1 medical group
Gary Horewitz's primary practice is Johns Hopkins Bayview Medical Center in Baltimore, Maryland, part of Johns Hopkins Health System. The medical group on file is Johns Hopkins University.
Sources: Dmand AI Affiliation Data; and Dmand AI Org Hierarchy Data
Dmand AI tracks the EHR system at Gary Horewitz's practice
Dmand AI tracks the electronic health record (EHR) system at each site where Gary Horewitz practices. Vendor and product names are available with a free account.
| Site | EHR vendor and product |
|---|---|
| Johns Hopkins Bayview Medical Center | Available with a free account |
Source: Dmand AI Technology Install Data
For health IT teams
Dmand AI maps EHR vendors, IT decision makers and buying committees across Johns Hopkins Health System and 6.2K+ hospitals, with verified contacts in the same login.
Gary Horewitz is one of 2,452 physician assistants in Maryland
Physician assistant is Gary Horewitz's primary specialty in the NPI Registry, under taxonomy code 363A00000X. Gary Horewitz is licensed in Maryland.
Specialties and state licenses
- Physician assistant, MarylandPrimary
Physician assistants near Gary Horewitz
Counts of physician assistants 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
Gary Horewitz treated 89 Medicare patients in 2024, average age 67
CMS counts 89 Medicare patients who saw Gary Horewitz in 2024. The largest group is under 65, with 30 patients. 75% of them have high blood pressure, and 71% have high cholesterol. 49% are also on Medicaid. Their average risk score is 2.02, where 1.00 is the Medicare average, so they are sicker than most Medicare patients.
Across all payers, Dmand AI patient panel data puts Gary Horewitz's median patient age at 61, with 46% women.
Gary Horewitz's Medicare patients by age, 2024
CMS leaves out age groups with fewer than 11 patients.
Gary Horewitz's Medicare patients by sex, 2024
- Women4854%
- Men4146%
Chronic conditions among Gary Horewitz's Medicare patients, 2024
- High blood pressure75%
- High cholesterol71%
- Mood disorders65%
- Anxiety54%
- Arthritis52%
- Depression51%
- Diabetes40%
- COPD37%
Share of Medicare patients with each condition. A patient can have several.
Gary Horewitz's patients across all payers
Dmand AI patient panel data covers Medicare, Medicaid and commercial patients.
Patient panel by age, all payers
Median age 61
Patient panel by sex, all payers
- Women46%
- Men54%
Sources: Dmand AI Patient Panel Data; and Medicare Physician & Other Practitioners - by Provider (CMS), 2024 data
Gary Horewitz wrote 20 Medicare Part D claims in 2024
In 2024, Gary Horewitz wrote 20 Medicare Part D claims. 95% of them were for generic drugs.
Gary Horewitz's Part D claims by kind of drug, 2024
- Generic19 claims95%
- Brand-name and other1 claims5%
Source: Medicare Part D Prescribers - by Provider (CMS), 2024 data
Gary Horewitz scored 83 out of 100 in Medicare's MIPS program for 2024
CMS publishes a Merit-based Incentive Payment System (MIPS) score of 83 out of 100 for Gary Horewitz for performance year 2024, reported as part of a group.
Gary Horewitz's MIPS scores, performance year 2024
- 83of 100Final score
- 73.9of 100Quality
- 100of 100Promoting Interoperability
- 40of 100Improvement Activities
- 70of 100Cost
Each score is out of 100. The final score weighs the categories CMS scored for this clinician.
Source: Clinician Public Reporting: Overall MIPS Performance (CMS), 2024 data, released September 10, 2026
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Sources for Gary Horewitz'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 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 (CMS) (opens in a new tab) |
| MIPS scores, telehealth, assignment and procedure percentiles | Clinician Public Reporting: Overall MIPS Performance (CMS) (opens in a new tab) |
| 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 Gary Horewitz
Spotted something out of date? Email hello@dmand.ai and we will check the record. Contact details live in the free trial.
What is Gary Horewitz's NPI number?
Gary Horewitz's NPI number is 1427430875. It was assigned on June 22, 2015, and it is active in the NPI Registry.
What does Gary Horewitz specialize in?
Gary Horewitz is a physician assistant in Baltimore, Maryland. The primary specialty in the NPI Registry is Physician Assistant (taxonomy code 363A00000X).
Where does Gary Horewitz practice?
Gary Horewitz practices at 4940 Eastern Avenue, Baltimore, MD 21224. Gary Horewitz's primary practice is Johns Hopkins Bayview Medical Center in Baltimore, Maryland, part of Johns Hopkins Health System.
What is Gary Horewitz's office phone number?
The practice phone on file for Gary Horewitz is (410) 550-0123.
What is Gary Horewitz's medical license number?
Gary Horewitz holds Maryland license C0005771.
Which hospitals is Gary Horewitz affiliated with?
Gary Horewitz practices at Johns Hopkins Bayview Medical Center in Baltimore, Maryland.
What medical group is Gary Horewitz part of?
Gary Horewitz is linked to Johns Hopkins University.
What is Gary Horewitz's MIPS score?
Gary Horewitz's MIPS final score for performance year 2024 is 83 out of 100, reported as part of a group.
How many Medicare patients does Gary Horewitz see?
CMS counts 89 Medicare patients who saw Gary Horewitz in 2024, with an average age of 67.
How long has Gary Horewitz been practicing?
Gary Horewitz graduated from medical school in 2012, 14 years ago.
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