Brian Keroack, MD
NPI 1891788659 · Specialist · Portland, ME
Enrolled with Medicare as Practitioner - Rheumatology · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Brian Keroack, MD is a Specialist provider in Portland, ME (NPI 1891788659).
Provider details
- NPI number
- 1891788659
- Entity type
- Individual
- Primary specialty
- SpecialistOther Service Providers
- Credential
- MD
- Sex
- Male
- Sole proprietor
- No
- License
- 013245 (ME)
Specialties & taxonomies
Other Service Providers
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
3,022 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) |
|---|---|---|
| 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 | 369 | $16 |
| Insertion of Needle Into Vein for Collection of Blood Sample36415 | 343 | $9 |
| Established Patient Office Or Other Outpatient Visit With Moderate Level of Decision Making, If Using Time, 30 Minutes Or More99214 | 311 | $125 |
| Blood Test, Comprehensive Group of Blood Chemicals80053 | 267 | $10 |
| Complete Blood Cell Count (red Cells, White Blood Cell, Platelets), Automated Test and Automated Differential White Blood Cell Count85025 | 238 | $8 |
| Administration of Chemotherapy Into Vein, 1 Hour Or Less |
What this provider prescribes (Medicare Part D)
Top drugs by Medicare Part D claim volume, 2024 · 44 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Prednisone | 714 | 186 |
| Methotrexate Sodiumbrand: Methotrexate | 564 | 149 |
| Hydroxychloroquine Sulfate | 331 | 95 |
| Etanerceptbrand: Enbrel Sureclick | 260 | 30 |
| Meloxicam | 196 | 68 |
| Hydrocodone/Acetaminophenbrand: Hydrocodone-Acetaminophen | 196 | 48 |
Transparency — industry payments
Based on CMS Open Payments, 2024; not all care is captured.
$250 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
- 2005-08-26
- Last updated
- 2008-10-09
Frequently asked questions
- What is Brian Keroack's NPI number?
- Brian Keroack's National Provider Identifier (NPI) is 1891788659, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Brian Keroack's specialty?
- Brian Keroack is listed in the NPPES registry with a primary specialty of Specialist (Other Service Providers).
- Where is Brian Keroack located?
- Brian Keroack's practice location on file with NPPES is 51 Sewall St, Portland, ME 04102-2643.
- What is Brian Keroack's phone number?
- The practice phone number listed in the NPPES registry for Brian Keroack is (207) 774-5761.
- Does Brian Keroack accept Medicare?
- Brian Keroack is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Brian Keroack's NPI active?
- Yes — Brian Keroack's NPI (1891788659) is active in the NPPES registry as of the last update on 2008-10-09.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.