Dr. Ruth S. Horowitz, MD
- Medicare services, 2024
- 17,899
- Medicare patients, 2024
- 830
- Part D claims, 2024
- 3,116
- Hospital affiliations
- 1
- Industry payments
- $11,586
- Practice address
- 6535 N Charles St, Towson, MD 21204
- Practice phone
- Call (410) 825-5454
- Professional email
- Get professional email
- Personal email
- Get personal email
- Mobile number
- Get mobile number
Primary practice
Summit Ambulatory Surgical Center, LLC
Towson, 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. Ruth S. Horowitz is an endocrinologist in Towson, Maryland
Dr. Horowitz practices at Summit Ambulatory Surgical Center, LLC in Towson, Maryland.
Dr. Horowitz's NPI, 1003811423, was assigned on June 14, 2005. Dr. Horowitz graduated from University of Cincinnati College of Medicine in 1988. Dr. Horowitz holds Maryland license D45811.
- NPI
- 1003811423NPI Registry (opens in a new tab)
- Medicare PAC ID
- 0345220257
- NPI enumeration date
- June 14, 2005
- NPI status
- Active
- Accepts Medicare assignment
- Yes
- Offers telehealth
- Yes
- Practice phone
- (410) 825-5454
- Professional email
- Get email
- Personal email
- Get email
- Mobile number
- Get number
- Sex
- Female
- Estimated age
- 64
- Medical school graduation
- 1988
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; Dmand AI Practice Data; and Doctors and Clinicians National Downloadable File (CMS)
Dr. Ruth S. Horowitz practices at Summit Ambulatory Surgical Center, LLC in Towson, Maryland
Dr. Horowitz's primary practice is Summit Ambulatory Surgical Center, LLC, at 6535 N Charles St, Towson, MD 21204 in Baltimore County. The practice phone is (410) 825-5454.
- Summit Ambulatory Surgical Center, LLC6535 N Charles St, Towson, MD 21204 · Baltimore CountyPhone(410) 825-5454
Sources: NPPES NPI Registry (CMS); and Dmand AI Practice Data
Dr. Ruth S. Horowitz is affiliated with 5 sites of care and 3 medical groups
Dr. Horowitz's primary practice is Summit Ambulatory Surgical Center, LLC in Towson, Maryland. Dr. Horowitz is also affiliated with Greater Baltimore Medical Center. The medical group on file is Privia Medical Group. Dmand AI also links Dr. Horowitz to 3 more group practices and clinics and 2 medical groups, each named with a free account.
Sources: NPPES NPI Registry (CMS); Dmand AI Practice Data; and Dmand AI Affiliation Data
Dmand AI tracks the EHR system at Dr. Ruth S. Horowitz's practice
Dmand AI tracks the electronic health record (EHR) system at each site where Dr. Horowitz practices, 4 sites in all. Vendor and product names are available with a free account.
| Site | EHR vendor and product |
|---|---|
| Summit Ambulatory Surgical Center, LLC | Available with a free account |
| +4 more sites and 2 medical groups | Available with a free account |
Source: Dmand AI Technology Install Data
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Dr. Ruth S. Horowitz is one of 248 endocrinologists in Maryland
Endocrinology, diabetes and metabolism is Dr. Horowitz's primary specialty in the NPI Registry, under taxonomy code 207RE0101X. Dr. Horowitz is licensed in Maryland.
Specialties and state licenses
- Endocrinology, diabetes and metabolism, MarylandPrimary
Endocrinologists near Dr. Horowitz
Counts of endocrinologists 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. Ruth S. Horowitz billed Medicare for 17,899 services in 2024
CMS data shows 17,899 Medicare services from Dr. Horowitz across 15 procedure codes in 2024, for 830 Medicare patients. Medicare paid $440,914 for them.
Dr. Horowitz's Medicare services by type, 2023 to 2024
- 2023
- 2024
- Drugs given in the office
- 2023: 12,9002024: 13,2002%
- Office and hospital visits
- 2023: 1,2782024: 1,2383%
- Lab and pathology
- 2023: 1,2822024: 1,1659%
- Other services
- 2023: 02024: 905
- Surgery
- 2023: 5802024: 5417%
- Imaging
- 2023: 4742024: 4811%
- Tests and treatments
- 2023: 3702024: 369No change
Where Dr. Horowitz's Medicare services took place, 2024
- In an office17,865100%
- In a facility340%
Dr. Horowitz compared with the Maryland median for endocrinologists, 2024
- Dr. Horowitz
- Maryland median
- Medicare services
- 17,899vs 86920.6 times
- Medicare patients
- 830vs 3242.6 times
- Part D claims
- 2,667vs 1,2132.2 times
Medians across 227 endocrinologists in Maryland with Dmand AI profiles that report each measure.
Dr. Horowitz'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.
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Medicare shows one payer. Book a meeting to get commercial claims data for Dr. Horowitz and other endocrinologists in Maryland.
Sources: Medicare Physician & Other Practitioners - by Provider and Service (CMS), 2024 data; and Dmand AI Peer Benchmarks
Dr. Ruth S. Horowitz treated 830 Medicare patients in 2024, average age 75
CMS counts 830 Medicare patients who saw Dr. Horowitz in 2024. The largest group is 75 to 84, with 361 patients. 75% of them have high cholesterol, and 72% have high blood pressure. 4% are also on Medicaid. Their average risk score is 1.10, where 1.00 is the Medicare average.
Across all payers, Dmand AI patient panel data puts Dr. Horowitz's median patient age at 59, with 70% women.
Dr. Horowitz's Medicare patients by age, 2024
Dr. Horowitz's Medicare patients by sex, 2024
- Women65979%
- Men17121%
Chronic conditions among Dr. Horowitz's Medicare patients, 2024
- High cholesterol75%
- High blood pressure72%
- Arthritis51%
- Osteoporosis50%
- Diabetes41%
- Anxiety27%
- Ischemic heart disease26%
- Mood disorders25%
Share of Medicare patients with each condition. A patient can have several.
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 59
Patient panel by sex, all payers
- Women70%
- Men29%
Sources: Dmand AI Patient Panel Data; and Medicare Physician & Other Practitioners - by Provider (CMS), 2024 data
Dr. Ruth S. Horowitz wrote 3,116 Medicare Part D claims in 2024
In 2024, Dr. Horowitz wrote 3,116 Medicare Part D claims for 511 patients. 55% of them were for generic drugs. CMS names the drug for 2,667 of them, across 55 drugs with 11 or more claims each, at $785,570 in total drug cost. In 2023, CMS named 2,481 claims across 54 drugs.
Dr. Horowitz's Part D claims by kind of drug, 2024
- Generic1,715 claims55%
- Brand-name1,242 claims40%
- Other159 claims5%
Dr. Horowitz'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.
Part D claims for drugs CMS names, 2023 to 2024
- 2023
- 2024
- Claims for drugs CMS names
- 2023: 2,4812024: 2,6677%
Drugs named by CMS: 55 in 2024, 54 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
Dr. Ruth S. Horowitz offers telehealth to Medicare patients
Dr. Horowitz accepts Medicare assignment, so Medicare's approved amount is taken as full payment. CMS lists Dr. Horowitz as offering telehealth.
- Accepts Medicare assignment
- Yes
- Offers telehealth
- Yes
Source: Doctors and Clinicians National Downloadable File (CMS)
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Dr. Ruth S. Horowitz received $11,586 in industry payments from 2016 to 2025
CMS Open Payments shows 504 general payments to Dr. Horowitz from 62 drug and device companies from 2016 to 2025. Food and beverage make up the largest share, 87% of the total. Medtronic MiniMed, Inc. paid the most, $2,004.
General payments to Dr. Horowitz by program year, 2016 to 2025
General payments to Dr. Horowitz by kind, 2016 to 2025
- Food and beverage$10,12287%
- Travel and lodging$1,38712%
- Education$510%
- Speaker and faculty fees$250%
Companies that paid Dr. Horowitz 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. Ruth S. Horowitz graduated from University of Cincinnati College of Medicine
Dr. Horowitz graduated from University of Cincinnati College of Medicine in 1988.
- Medical school
Source: Dmand AI Professional Profile Data
Sources for Dr. Ruth S. 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 | NPPES NPI Registry (CMS) (opens in a new tab)Dmand AI Practice Data |
| Primary practice, affiliations and health system | NPPES NPI Registry (CMS) (opens in a new tab)Dmand AI Practice DataDmand 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 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) |
| 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. Ruth S. 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. Ruth S. Horowitz's NPI number?
Dr. Ruth S. Horowitz's NPI number is 1003811423. It was assigned on June 14, 2005, and it is active in the NPI Registry.
What kind of doctor is Dr. Ruth S. Horowitz?
Dr. Ruth S. Horowitz is an endocrinologist in Towson, Maryland. The primary specialty in the NPI Registry is Endocrinology, Diabetes & Metabolism Physician (taxonomy code 207RE0101X).
Where does Dr. Ruth S. Horowitz practice?
Dr. Horowitz practices at 6535 N Charles St, Towson, MD 21204. Dr. Horowitz's primary practice is Summit Ambulatory Surgical Center, LLC in Towson, Maryland. Dmand AI also links Dr. Horowitz to 3 group practices and clinics and 2 medical groups.
What is Dr. Ruth S. Horowitz's office phone number?
The practice phone on file for Dr. Horowitz is (410) 825-5454.
What is Dr. Ruth S. Horowitz's medical license number?
Dr. Horowitz holds Maryland license D45811.
Which hospitals is Dr. Ruth S. Horowitz affiliated with?
Dr. Horowitz is affiliated with Greater Baltimore Medical Center.
What medical group is Dr. Ruth S. Horowitz part of?
Dr. Horowitz is linked to Privia Medical Group. Dmand AI links Dr. Horowitz to 2 more medical groups.
Does Dr. Ruth S. Horowitz accept Medicare?
Yes. CMS data shows Dr. Horowitz billed Medicare for 17,899 services in 2024, and Dr. Horowitz accepts Medicare assignment.
Does Dr. Ruth S. Horowitz offer telehealth?
Yes. The CMS Doctors and Clinicians file lists Dr. Horowitz as offering telehealth services.
How many Medicare patients does Dr. Ruth S. Horowitz see?
CMS counts 830 Medicare patients who saw Dr. Horowitz in 2024, with an average age of 75.
Show 5 more questionsShow fewer questions
What services does Dr. Ruth S. Horowitz bill to Medicare?
In 2024, Dr. Horowitz's most billed Medicare services were injected or infused drug (J0897), office visit, established patient (99214) and medicare service (G2211).
Where did Dr. Ruth S. Horowitz go to medical school?
Dr. Horowitz graduated from University of Cincinnati College of Medicine in 1988.
What drugs does Dr. Ruth S. Horowitz prescribe most?
In 2024 Medicare Part D data, Dr. Horowitz's most prescribed drugs by claims were Levothyroxine Sodium, Alendronate Sodium and Synthroid.
Has Dr. Ruth S. Horowitz received payments from drug or device companies?
CMS Open Payments shows $11,586 in general payments to Dr. Horowitz from 62 companies from 2016 to 2025. The largest total came from Medtronic MiniMed, Inc.
How long has Dr. Ruth S. Horowitz been practicing?
Dr. Horowitz graduated from medical school in 1988, 38 years ago.
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