Herbert Brennan, DO
NPI 1659489060 · Internal Medicine Physician · East Greenwich, RI
Enrolled with Medicare as Practitioner - Internal Medicine · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Herbert Brennan, DO is a Internal Medicine Physician provider in East Greenwich, RI (NPI 1659489060).
Provider details
- NPI number
- 1659489060
- Entity type
- Individual
- Primary specialty
- Internal Medicine PhysicianAllopathic & Osteopathic Physicians
- Credential
- DO
- Sex
- Male
- Sole proprietor
- No
- License
- D000445 (RI)
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
19 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
822 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 | 191 | $129 |
| Annual Wellness Visit, Includes a Personalized Prevention Plan of Service (pps), Subsequent VisitG0439 | 152 | $131 |
| Annual Depression Screening, 5 to 15 MinutesG0444 | 150 | $19 |
| Stool Analysis for Blood to Screen for Colon Tumors82270 | 95 | $4 |
| Hemoglobin A1c Level83036 | 75 | $10 |
| 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 |
What this provider prescribes (Medicare Part D)
Top drugs by Medicare Part D claim volume, 2024 · 119 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Atorvastatin Calcium | 332 | 87 |
| Simvastatin | 327 | 85 |
| Lisinopril | 288 | 71 |
| Levothyroxine Sodium | 285 | 65 |
| Omeprazole | 274 | 69 |
| Amlodipine Besylate | 270 | 66 |
| Sertraline Hcl | 226 |
Transparency — industry payments
Based on CMS Open Payments, 2024; not all care is captured.
$155 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
- 2006-08-26
- Last updated
- 2008-09-10
Frequently asked questions
- What is Herbert Brennan's NPI number?
- Herbert Brennan's National Provider Identifier (NPI) is 1659489060, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Herbert Brennan's specialty?
- Herbert Brennan is listed in the NPPES registry with a primary specialty of Internal Medicine Physician (Allopathic & Osteopathic Physicians).
- Where is Herbert Brennan located?
- Herbert Brennan's practice location on file with NPPES is 2358 South County Trail, East Greenwich, RI 02818.
- What is Herbert Brennan's phone number?
- The practice phone number listed in the NPPES registry for Herbert Brennan is (401) 886-6000.
- Does Herbert Brennan accept Medicare?
- Herbert Brennan is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Herbert Brennan's NPI active?
- Yes — Herbert Brennan's NPI (1659489060) is active in the NPPES registry as of the last update on 2008-09-10.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.