Robert O'Brian, M.D.
NPI 1730140724 · Rheumatology Physician · Eldersburg, MD
Enrolled with Medicare as Practitioner - Rheumatology · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Robert O'Brian, M.D. is a Rheumatology Physician provider in Eldersburg, MD (NPI 1730140724).
Provider details
- NPI number
- 1730140724
- Entity type
- Individual
- Primary specialty
- Rheumatology PhysicianAllopathic & Osteopathic Physicians
- Credential
- M.D.
- Sex
- Male
- Sole proprietor
- No
- License
- 9901590 (NC)
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
1,628 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 | 525 | $140 |
| 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 | 524 | $18 |
| Administration of Chemotherapy Into Vein, 1 Hour Or Less96413 | 169 | $144 |
| Administration of Non-Hormonal Anti-Neoplastic Chemotherapy Under Skin Or Into Muscle96401 | 135 | $80 |
| Aspiration And/Or Injection of Fluid From Large Joint20610 | 93 | $81 |
| Established Patient Office Or Other Outpatient Visit With Low Level OD Decision Making, If Using Time, 20 Minutes Or More |
What this provider prescribes (Medicare Part D)
Top drugs by Medicare Part D claim volume, 2024 · 24 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Methotrexate Sodiumbrand: Methotrexate | 258 | 88 |
| Sulfasalazine | 235 | 81 |
| Prednisone | 115 | 43 |
| Meloxicam | 113 | 46 |
| Allopurinol | 97 | 27 |
| Gabapentin | 64 | 28 |
| Celecoxib | 56 | 23 |
| Hydroxychloroquine Sulfate |
Transparency — industry payments
Based on CMS Open Payments, 2024; not all care is captured.
$48 across 2 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
- 2006-03-29
- Last updated
- 2020-10-06
- Certified
- 2020-10-06
Frequently asked questions
- What is Robert O'Brian's NPI number?
- Robert O'Brian's National Provider Identifier (NPI) is 1730140724, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Robert O'Brian's specialty?
- Robert O'Brian is listed in the NPPES registry with a primary specialty of Rheumatology Physician (Allopathic & Osteopathic Physicians).
- Where is Robert O'Brian located?
- Robert O'Brian's practice location on file with NPPES is 6190 Georgetown Blvd, Eldersburg, MD 21784.
- What is Robert O'Brian's phone number?
- The practice phone number listed in the NPPES registry for Robert O'Brian is (410) 795-9700.
- Does Robert O'Brian accept Medicare?
- Robert O'Brian is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Robert O'Brian's NPI active?
- Yes — Robert O'Brian's NPI (1730140724) is active in the NPPES registry as of the last update on 2020-10-06.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.