Doreen Brettler, M.D.
NPI 1710960398 · Hematology & Oncology Physician · Worcester, MA
Enrolled with Medicare as Practitioner - Hematology/Oncology · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Doreen Brettler, M.D. is a Hematology & Oncology Physician provider in Worcester, MA (NPI 1710960398).
Provider details
- NPI number
- 1710960398
- Entity type
- Individual
- Primary specialty
- Hematology & Oncology PhysicianAllopathic & Osteopathic Physicians
- Credential
- M.D.
- Sex
- Female
- Sole proprietor
- No
- License
- 40852 (MA)
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
771 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 | 336 | $96 |
| Established Patient Office Or Other Outpatient Visit With High Level of Medical Decision Making, If Using Time, 40 Minutes Or More99215 | 227 | $142 |
| 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 | 147 | $16 |
| New Patient Office Or Other Outpatient Visit With a High Level of Medical Decision Making, If Using Time, 60 Minutes Or More99205 | 38 | $180 |
| New Patient Office Or Other Outpatient Visit With Moderate Level of Medical Decision Making, If Using Time, 45 Minutes Or More99204 | 23 | $132 |
What this provider prescribes (Medicare Part D)
Top drugs by Medicare Part D claim volume, 2024 · 20 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Hydroxyurea | 60 | 18 |
| Prednisone | 51 | 15 |
| Ruxolitinib Phosphatebrand: Jakafi | 40 | — |
| Sulfamethoxazole/Trimethoprimbrand: Sulfamethoxazole-Trimethoprim | 32 | — |
| Avatrombopag Maleatebrand: Doptelet | 28 | — |
| Acalabrutinib Maleatebrand: Calquence | 27 | — |
| Venetoclaxbrand: Venclexta |
Transparency — industry payments
Based on CMS Open Payments, 2024; not all care is captured.
$114 across 1 record (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
- 2005-11-28
- Last updated
- 2023-03-20
- Certified
- 2023-03-20
Frequently asked questions
- What is Doreen Brettler's NPI number?
- Doreen Brettler's National Provider Identifier (NPI) is 1710960398, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Doreen Brettler's specialty?
- Doreen Brettler is listed in the NPPES registry with a primary specialty of Hematology & Oncology Physician (Allopathic & Osteopathic Physicians).
- Where is Doreen Brettler located?
- Doreen Brettler's practice location on file with NPPES is 55 Lake Ave N, Worcester, MA 01655-0002.
- What is Doreen Brettler's phone number?
- The practice phone number listed in the NPPES registry for Doreen Brettler is (508) 334-3550.
- Does Doreen Brettler accept Medicare?
- Doreen Brettler is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Doreen Brettler's NPI active?
- Yes — Doreen Brettler's NPI (1710960398) is active in the NPPES registry as of the last update on 2023-03-20.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.