Francis O'Brien, MD
NPI 1558348441 · Internal Medicine Physician · Winston Salem, NC
Enrolled with Medicare as Practitioner - Internal Medicine · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Francis O'Brien, MD is a Internal Medicine Physician provider in Winston Salem, NC (NPI 1558348441).
Provider details
- NPI number
- 1558348441
- Entity type
- Individual
- Primary specialty
- Internal Medicine PhysicianAllopathic & Osteopathic Physicians
- Credential
- MD
- Sex
- Male
- Sole proprietor
- No
- License
- 9801426 (NC)
Specialties & taxonomies
Allopathic & Osteopathic Physicians
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure28% of score
20 yrs in NPPES registry
- Profile completeness28% of score
100% of core fields populated
- Practice footprint17% of score
1 documented practice location
- Medicare service volume (vs. specialty peers)28% of score
739 Medicare services, 2024 (ranked within specialty)
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 methodology.
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 | 413 | $119 |
| Annual Wellness Visit, Includes a Personalized Prevention Plan of Service (pps), Subsequent VisitG0439 | 129 | $121 |
| Established Patient Office Or Other Outpatient Visit With High Level of Medical Decision Making, If Using Time, 40 Minutes Or More99215 | 104 | $165 |
| Administration of Influenza Virus VaccineG0008 | 52 | $30 |
| Routine Electrocardiogram (ecg) Using at Least 12 Leads With Tracing93005 | 23 | $6 |
| Administration of Pneumococcal VaccineG0009 |
What this provider prescribes (Medicare Part D)
Top drugs by Medicare Part D claim volume, 2024 · 130 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Losartan Potassium | 444 | 119 |
| Amlodipine Besylate | 380 | 112 |
| Atorvastatin Calcium | 305 | 85 |
| Rosuvastatin Calcium | 297 | 93 |
| Omeprazole | 244 | 64 |
| Carvedilol | 229 | 62 |
| Levothyroxine Sodium |
Practice location
Mailing address
Registry dates
- Enumerated
- 2005-12-30
- Last updated
- 2008-05-15
Frequently asked questions
- What is Francis O'Brien's NPI number?
- Francis O'Brien's National Provider Identifier (NPI) is 1558348441, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Francis O'Brien's specialty?
- Francis O'Brien is listed in the NPPES registry with a primary specialty of Internal Medicine Physician (Allopathic & Osteopathic Physicians).
- Where is Francis O'Brien located?
- Francis O'Brien's practice location on file with NPPES is Medical Center Blvd, Winston Salem, NC 27157-0001.
- What is Francis O'Brien's phone number?
- The practice phone number listed in the NPPES registry for Francis O'Brien is (336) 716-2255.
- Does Francis O'Brien accept Medicare?
- Francis O'Brien is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Francis O'Brien's NPI active?
- Yes — Francis O'Brien's NPI (1558348441) is active in the NPPES registry as of the last update on 2008-05-15.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.