Rajesh Zacharias, MD
NPI 1952534364 · Critical Care Medicine (Internal Medicine) Physician · Boston, MA
Enrolled with Medicare as Practitioner - Pulmonary Disease · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Rajesh Zacharias, MD is a Critical Care Medicine (Internal Medicine) Physician provider in Boston, MA (NPI 1952534364).
Provider details
- NPI number
- 1952534364
- Entity type
- Individual
- Primary specialty
- Critical Care Medicine (Internal Medicine) PhysicianAllopathic & Osteopathic Physicians
- Credential
- MD
- Sex
- Male
- Sole proprietor
- No
- License
- 283964 (MA)
Specialties & taxonomies
Allopathic & Osteopathic Physicians
Allopathic & Osteopathic Physicians
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure25% of score
16 yrs in NPPES registry
- Profile completeness25% of score
100% of core fields populated
- Practice footprint15% of score
2 documented practice locations
- Medicare service volume (vs. specialty peers)25% of score
303 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) |
|---|---|---|
| Critical Care, First 30-74 Minutes99291 | 175 | $218 |
| Sleep Study Including Heart Rate, Breathing, and Sleep Time95800 | 29 | $41 |
| Subsequent Hospital Care With Moderate Levelof Medical Decision Making, If Using Time, at Least 50 Minutes99233 | 29 | $123 |
| Sleep Study in Sleep Lab (6 Years Or Older)95810 | 17 | $122 |
| 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 | 17 | $17 |
| Established Patient Office Or Other Outpatient Visit With High Level of Medical Decision Making, If Using Time, 40 Minutes Or More |
Transparency — industry payments
Based on CMS Open Payments, 2024; not all care is captured.
$125 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
Additional practice locations (1)
- 41 Mall RdBurlington, MA 01805-1552Phone: (781) 744-8000
Registry dates
- Enumerated
- 2009-09-01
- Last updated
- 2022-10-27
- Certified
- 2022-10-27
Frequently asked questions
- What is Rajesh Zacharias's NPI number?
- Rajesh Zacharias's National Provider Identifier (NPI) is 1952534364, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Rajesh Zacharias's specialty?
- Rajesh Zacharias is listed in the NPPES registry with a primary specialty of Critical Care Medicine (Internal Medicine) Physician (Allopathic & Osteopathic Physicians).
- Where is Rajesh Zacharias located?
- Rajesh Zacharias's practice location on file with NPPES is 800 Washington St, Boston, MA 02111-1552.
- What is Rajesh Zacharias's phone number?
- The practice phone number listed in the NPPES registry for Rajesh Zacharias is (617) 636-5000.
- Does Rajesh Zacharias accept Medicare?
- Rajesh Zacharias is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Rajesh Zacharias's NPI active?
- Yes — Rajesh Zacharias's NPI (1952534364) is active in the NPPES registry as of the last update on 2022-10-27.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.