Warren Ross, M.D.
NPI 1770568891 · Internal Medicine Physician · Ellicott City, MD
Enrolled with Medicare as Practitioner - Internal Medicine · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Warren Ross, M.D. is a Internal Medicine Physician provider in Ellicott City, MD (NPI 1770568891).
Provider details
- NPI number
- 1770568891
- Entity type
- Individual
- Primary specialty
- Internal Medicine PhysicianAllopathic & Osteopathic Physicians
- Credential
- M.D.
- Sex
- Male
- Sole proprietor
- No
- License
- D0017821 (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
20 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
30,729 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 | 2,304 | $94 |
| Insertion of Needle Into Vein for Collection of Blood Sample36415 | 1,514 | $9 |
| Blood Test, Comprehensive Group of Blood Chemicals80053 | 1,425 | $10 |
| Complete Blood Cell Count (red Cells, White Blood Cell, Platelets), Automated Test and Automated Differential White Blood Cell Count85025 | 1,356 | $8 |
| 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 | 1,332 | $17 |
| Measurement C-Reactive Protein for Detection of Infection Or Inflammation |
What this provider prescribes (Medicare Part D)
Top drugs by Medicare Part D claim volume, 2024 · 89 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Rosuvastatin Calcium | 555 | 169 |
| Amlodipine Besylate | 359 | 115 |
| Atorvastatin Calcium | 263 | 78 |
| Levothyroxine Sodium | 254 | 73 |
| Olmesartan Medoxomil | 221 | 61 |
| Telmisartan | 166 | 50 |
| Indapamide | 146 | 51 |
Transparency — industry payments
Based on CMS Open Payments, 2024; not all care is captured.
$1,197 across 49 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
- 2005-12-12
- Last updated
- 2009-12-31
Frequently asked questions
- What is Warren Ross's NPI number?
- Warren Ross's National Provider Identifier (NPI) is 1770568891, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Warren Ross's specialty?
- Warren Ross is listed in the NPPES registry with a primary specialty of Internal Medicine Physician (Allopathic & Osteopathic Physicians).
- Where is Warren Ross located?
- Warren Ross's practice location on file with NPPES is 4801 Dorsey Hall Dr, Ellicott City, MD 21042-7766.
- What is Warren Ross's phone number?
- The practice phone number listed in the NPPES registry for Warren Ross is (410) 997-7660.
- Does Warren Ross accept Medicare?
- Warren Ross is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Warren Ross's NPI active?
- Yes — Warren Ross's NPI (1770568891) is active in the NPPES registry as of the last update on 2009-12-31.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.