Arturo Diaz, MD
NPI 1245315852 · Rheumatology Physician · Boston, MA
Enrolled with Medicare as Practitioner - Internal Medicine · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Arturo Diaz, MD is a Rheumatology Physician provider in Boston, MA (NPI 1245315852).
Provider details
- NPI number
- 1245315852
- Entity type
- Individual
- Primary specialty
- Rheumatology PhysicianAllopathic & Osteopathic Physicians
- Credential
- MD
- Sex
- Male
- Sole proprietor
- No
- License
- 4301074804 (MI)
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
488 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 | 322 | $102 |
| 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 | 75 | $17 |
| Established Patient Office Or Other Outpatient Visit With High Level of Medical Decision Making, If Using Time, 40 Minutes Or More99215 | 38 | $151 |
| Established Patient Office Or Other Outpatient Visit With Low Level OD Decision Making, If Using Time, 20 Minutes Or More99213 | 22 | $69 |
| New Patient Office Or Other Outpatient Visit With Moderate Level of Medical Decision Making, If Using Time, 45 Minutes Or More99204 | 17 | $139 |
What this provider prescribes (Medicare Part D)
Top drugs by Medicare Part D claim volume, 2024 · 40 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Prednisone | 173 | 59 |
| Hydroxychloroquine Sulfate | 118 | 31 |
| Methotrexate Sodiumbrand: Methotrexate | 103 | 27 |
| Tocilizumabbrand: Actemra | 69 | — |
| Abataceptbrand: Orencia Clickject | 67 | — |
| Allopurinol | 61 | 20 |
| Celecoxib | 61 | 17 |
Transparency — industry payments
Based on CMS Open Payments, 2024; not all care is captured.
$178 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
- 2006-10-25
- Last updated
- 2011-04-08
Frequently asked questions
- What is Arturo Diaz's NPI number?
- Arturo Diaz's National Provider Identifier (NPI) is 1245315852, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Arturo Diaz's specialty?
- Arturo Diaz is listed in the NPPES registry with a primary specialty of Rheumatology Physician (Allopathic & Osteopathic Physicians).
- Where is Arturo Diaz located?
- Arturo Diaz's practice location on file with NPPES is 110 Francis St. Suite 4b, Boston, MA 02215.
- What is Arturo Diaz's phone number?
- The practice phone number listed in the NPPES registry for Arturo Diaz is (617) 632-8658.
- Does Arturo Diaz accept Medicare?
- Arturo Diaz is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Arturo Diaz's NPI active?
- Yes — Arturo Diaz's NPI (1245315852) is active in the NPPES registry as of the last update on 2011-04-08.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.