Dr. Irvin Robert Horowitz, MD
- Medicare services, 2019
- 209
- Part D claims, 2019
- 94
- Industry payments
- $61
- Affiliated sites
- 1
- State license
- 1
- Practice address
- 121 Congressional Ln Suite 416 Suite 416, Rockville, MD 20852
- Practice phone
- Call (301) 468-9090
- Professional email
- Get professional email
- Personal email
- Get personal email
- Mobile number
- Get mobile number
Primary practice
Irvin R Horowitz, M.D., PA
Physician office · Rockville, Maryland
Find Dr. Horowitz'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. Irvin Robert Horowitz is a dermatologist in Rockville, Maryland
Dr. Horowitz practices at Irvin R Horowitz, M.D., PA in Rockville, Maryland.
Dr. Horowitz's NPI, 1376647537, was assigned on September 11, 2006. Dr. Horowitz holds Maryland license D0015098.
- NPI
- 1376647537NPI Registry (opens in a new tab)
- NPI enumeration date
- September 11, 2006
- NPI status
- Active
- Practice phone
- (301) 468-9090
- Professional email
- Get email
- Personal email
- Get email
- Mobile number
- Get number
- Sex
- Male
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; and Dmand AI Affiliation Data
Dr. Irvin Robert Horowitz practices at Irvin R Horowitz, M.D., PA in Rockville, Maryland
Dr. Horowitz's primary practice is Irvin R Horowitz, M.D., PA, at 121 Congressional Ln Suite 416 Suite 416, Rockville, MD 20852. The practice phone is (301) 468-9090.
- Irvin R Horowitz, M.D., PA121 Congressional Ln Suite 416 Suite 416, Rockville, MD 20852Phone(301) 468-9090
Source: Dmand AI Affiliation Data
Dr. Irvin Robert Horowitz is affiliated with 1 site of care
Dr. Horowitz's primary practice is Irvin R Horowitz, M.D., PA in Rockville, Maryland.
Source: Dmand AI Affiliation Data
Dmand AI tracks the EHR system at Dr. Irvin Robert Horowitz's practice
Dmand AI tracks the electronic health record (EHR) system at each site where Dr. Horowitz practices. Vendor and product names are available with a free account.
| Site | EHR vendor and product |
|---|---|
| Irvin R Horowitz, M.D., PA | Available with a free account |
Source: Dmand AI Technology Install Data
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Dr. Irvin Robert Horowitz is one of 270 dermatologists in Maryland
Dermatology is Dr. Horowitz's primary specialty in the NPI Registry, under taxonomy code 207N00000X. Dr. Horowitz is licensed in Maryland.
Specialties and state licenses
- Dermatology, MarylandPrimary
Dermatologists near Dr. Horowitz
Counts of dermatologists 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. Irvin Robert Horowitz billed Medicare for 209 services in 2019
CMS data shows 209 Medicare services from Dr. Horowitz across 3 procedure codes in 2019. Medicare paid $5,362 for them. Every service was in an office.
Dr. Horowitz's Medicare services by type, 2018 to 2019
- 2018
- 2019
- Office and hospital visits
- 2018: 1,5422019: 19587%
- Surgery
- 2018: 5442019: 1497%
Dr. Horowitz compared with the Maryland median for dermatologists, 2019
- Dr. Horowitz
- Maryland median
- Medicare services
- 209vs 1,74888% below
- Part D claims
- 94vs 35574% below
Medians across 249 dermatologists in Maryland with Dmand AI profiles that report each measure.
Dr. Horowitz's most billed Medicare procedure codes, 2019
CMS publishes codes billed for 11 or more Medicare patients. Each label is the code family; CPT descriptions are licensed by the AMA.
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Medicare shows one payer. Book a meeting to get commercial claims data for Dr. Horowitz and other dermatologists in Maryland.
Sources: Medicare Physician & Other Practitioners - by Provider and Service (CMS), 2024 data; and Dmand AI Peer Benchmarks
Dr. Irvin Robert Horowitz's patients have a median age of 72
Across all payers, Dmand AI patient panel data puts Dr. Horowitz's median patient age at 72, with 30% women.
Dr. Horowitz's patients across all payers
Dmand AI patient panel data covers Medicare, Medicaid and commercial patients.
Patient panel by age, all payers
Median age 72
Patient panel by sex, all payers
- Women30%
- Men70%
Source: Dmand AI Patient Panel Data
Dr. Irvin Robert Horowitz wrote 94 Medicare Part D claims in 2019
In 2019, Dr. Horowitz wrote 94 Medicare Part D claims. Every claim was for a generic drug. They cover 5 drugs, with $5,288 in total drug cost. In 2018, CMS named 420 claims across 13 drugs.
Dr. Horowitz's most prescribed drugs by claims, 2019
CMS names a drug when it has 11 or more claims. Share is of the claims for drugs CMS names.
Part D claims for drugs CMS names, 2018 to 2019
- 2018
- 2019
- Claims for drugs CMS names
- 2018: 4202019: 9478%
Drugs named by CMS: 5 in 2019, 13 in 2018.
Source: Medicare Part D Prescribers - by Provider and Drug (CMS), 2024 data, released May 6, 2026
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Dr. Irvin Robert Horowitz received $61 in industry payments from 2016 to 2019
CMS Open Payments shows 3 general payments to Dr. Horowitz from 3 drug and device companies from 2016 to 2019. Food and beverage make up the largest share, 76% of the total. Janssen Pharmaceuticals, Inc paid the most, $35.
General payments to Dr. Horowitz by program year, 2016 to 2019
General payments to Dr. Horowitz by kind, 2016 to 2019
- Food and beverage$4676%
- Education$1524%
Companies that paid Dr. Horowitz the most, 2016 to 2019
Share is of all general payments to this clinician.
Source: Open Payments (CMS), 2025 data, released July 7, 2026
Sources for Dr. Irvin Robert Horowitz'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 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 Data |
| Part D prescribing | Medicare Part D Prescribers - by Provider and Drug (CMS) (opens in a new tab) |
| Industry payments | Open Payments (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 Dr. Irvin Robert Horowitz
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. Irvin Robert Horowitz's NPI number?
Dr. Irvin Robert Horowitz's NPI number is 1376647537. It was assigned on September 11, 2006, and it is active in the NPI Registry.
What kind of doctor is Dr. Irvin Robert Horowitz?
Dr. Irvin Robert Horowitz is a dermatologist in Rockville, Maryland. The primary specialty in the NPI Registry is Dermatology Physician (taxonomy code 207N00000X).
Where does Dr. Irvin Robert Horowitz practice?
Dr. Horowitz practices at 121 Congressional Ln Suite 416 Suite 416, Rockville, MD 20852. Dr. Horowitz's primary practice is Irvin R Horowitz, M.D., PA in Rockville, Maryland.
What is Dr. Irvin Robert Horowitz's office phone number?
The practice phone on file for Dr. Horowitz is (301) 468-9090.
What is Dr. Irvin Robert Horowitz's medical license number?
Dr. Horowitz holds Maryland license D0015098.
Does Dr. Irvin Robert Horowitz accept Medicare?
Yes. CMS data shows Dr. Horowitz billed Medicare for 209 services in 2019.
What services does Dr. Irvin Robert Horowitz bill to Medicare?
In 2019, Dr. Horowitz's most billed Medicare services were office visit, established patient (99212), office visit, established patient (99213) and surgery: skin and soft tissue (17000).
What drugs does Dr. Irvin Robert Horowitz prescribe most?
In 2019 Medicare Part D data, Dr. Horowitz's most prescribed drugs by claims were Triamcinolone Acetonide, Clobetasol Propionate and Ketoconazole.
Has Dr. Irvin Robert Horowitz received payments from drug or device companies?
CMS Open Payments shows $61 in general payments to Dr. Horowitz from 3 companies from 2016 to 2019. The largest total came from Janssen Pharmaceuticals, Inc.
How long has Dr. Irvin Robert Horowitz been practicing?
Dr. Horowitz's NPI was assigned in 2006.
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