Ruth Horowitz, MD
NPI 1003811423 · Endocrinology, Diabetes & Metabolism Physician · Timonium, MD
Enrolled with Medicare as Practitioner - Endocrinology · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Ruth Horowitz, MD is a Endocrinology, Diabetes & Metabolism Physician provider in Timonium, MD (NPI 1003811423).
Provider details
- NPI number
- 1003811423
- Entity type
- Individual
- Primary specialty
- Endocrinology, Diabetes & Metabolism PhysicianAllopathic & Osteopathic Physicians
- Credential
- MD
- Sex
- Female
- Sole proprietor
- No
- License
- D45811 (MD)
Specialties & taxonomies
Allopathic & Osteopathic Physicians
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure25% of score
21 yrs in NPPES registry
- Profile completeness25% of score
100% of core fields populated
- Practice footprint15% of score
1 documented practice location
- Medicare service volume (vs. specialty peers)25% of score
4,699 Medicare services, 2024 (ranked within specialty)
- Open Payments transparency10% of score
Has Open Payments disclosures (2024)
Medicare volume is ranked against active providers in the same specialty. Signals a provider has no public data for (e.g. Medicare claims) are left out of the score entirely — never counted as zero — so providers without that data are not penalized. See the full formula and weights in our .
What this provider does (Medicare)
Based on Medicare fee-for-service claims, 2024; not all care is captured.
| Service (HCPCS) | Medicare services | Typical Medicare-allowed (2024) |
|---|---|---|
| Established Patient Office Or Other Outpatient Visit With Moderate Level of Decision Making, If Using Time, 30 Minutes Or More99214 | 1,072 | $131 |
| Visit Complexity Inherent to Evaluation and Management Associated With Medical Care Services That Serve As the Continuing Focal Point for All Needed Health Care Services And/Or With Medical Care Services That Are Part of Ongoing Care Related to a Patient'SG2211 | 905 | $17 |
| Blood Glucose (sugar) Test Performed By Hand-Held Instrument82962 | 589 | $3 |
| Hemoglobin A1c Level83036 | 576 | $9 |
| Insertion of Needle Into Vein for Collection of Blood Sample36415 | 541 | $9 |
| Dxa Bone Density Measurement of Hip, Pelvis, Spine |
What this provider prescribes (Medicare Part D)
Top drugs by Medicare Part D claim volume, 2024 · 55 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Levothyroxine Sodium | 369 | 112 |
| Alendronate Sodium | 265 | 77 |
| Levothyroxine Sodiumbrand: Synthroid | 261 | 78 |
| Metformin Hcl | 128 | 41 |
| Metformin Hclbrand: Metformin Hcl Er | 109 | 32 |
| Empagliflozinbrand: Jardiance | 92 | 27 |
Transparency — industry payments
Based on CMS Open Payments, 2024; not all care is captured.
$1,193 across 55 records (Open Payments 2024)
Open Payments discloses payments and transfers of value (meals, travel, consulting, research, royalties) from drug and device makers to providers. This is a transparency signal, not a verdict — such payments are legal and common, and their presence is neither an endorsement nor a criticism. Source: CMS Open Payments, program year 2024.
Practice location
Mailing address
Registry dates
- Enumerated
- 2005-06-14
- Last updated
- 2025-05-09
Frequently asked questions
- What is Ruth Horowitz's NPI number?
- Ruth Horowitz's National Provider Identifier (NPI) is 1003811423, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Ruth Horowitz's specialty?
- Ruth Horowitz is listed in the NPPES registry with a primary specialty of Endocrinology, Diabetes & Metabolism Physician (Allopathic & Osteopathic Physicians).
- Where is Ruth Horowitz located?
- Ruth Horowitz's practice location on file with NPPES is 1 Texas Station Ct, Timonium, MD 21093-8286.
- What is Ruth Horowitz's phone number?
- The practice phone number listed in the NPPES registry for Ruth Horowitz is (410) 828-7417.
- Does Ruth Horowitz accept Medicare?
- Ruth Horowitz is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Ruth Horowitz's NPI active?
- Yes — Ruth Horowitz's NPI (1003811423) is active in the NPPES registry as of the last update on 2025-05-09.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.