Larry Nathanson, M.D.
NPI 1740220276 · Emergency Medicine Physician · Boston, MA
Enrolled with Medicare as Practitioner - Emergency Medicine · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Larry Nathanson, M.D. is a Emergency Medicine Physician provider in Boston, MA (NPI 1740220276).
Provider details
- NPI number
- 1740220276
- Entity type
- Individual
- Primary specialty
- Emergency Medicine PhysicianAllopathic & Osteopathic Physicians
- Credential
- M.D.
- Sex
- Male
- Sole proprietor
- No
- License
- 158840 (MA)
Specialties & taxonomies
Allopathic & Osteopathic Physicians
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure28% of score
20 yrs in NPPES registry
- Profile completeness28% of score
100% of core fields populated
- Practice footprint17% of score
2 documented practice locations
- Medicare service volume (vs. specialty peers)28% of score
499 Medicare services, 2024 (ranked within specialty)
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 methodology.
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) |
|---|---|---|
| Emergency Department Visit With High Level of Medical Decision Making99285 | 259 | $179 |
| Routine Electrocardiogram (ecg) Using at Least 12 Leads With Interpretation and Report Only93010 | 132 | $8 |
| Emergency Department Visit With Moderate Level of Medical Decision Making99284 | 43 | $124 |
| Critical Care, First 30-74 Minutes99291 | 37 | $219 |
| Established Patient Office Or Other Outpatient Visit With Moderate Level of Decision Making, If Using Time, 30 Minutes Or More99214 | 17 | $136 |
| Initial Hospital Care With Moderate Level of Medical Decision Making, If Using Time, at Least 75 Minutes99223 |
Practice location
Mailing address
Additional practice locations (1)
- 41 Mall RdBurlington, MA 01805-5321Phone: (781) 744-8000
Registry dates
- Enumerated
- 2006-06-06
- Last updated
- 2022-02-16
- Certified
- 2022-02-16
Frequently asked questions
- What is Larry Nathanson's NPI number?
- Larry Nathanson's National Provider Identifier (NPI) is 1740220276, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Larry Nathanson's specialty?
- Larry Nathanson is listed in the NPPES registry with a primary specialty of Emergency Medicine Physician (Allopathic & Osteopathic Physicians).
- Where is Larry Nathanson located?
- Larry Nathanson's practice location on file with NPPES is 1 Deaconess Rd, Boston, MA 02215-5321.
- What is Larry Nathanson's phone number?
- The practice phone number listed in the NPPES registry for Larry Nathanson is (617) 754-2389.
- Does Larry Nathanson accept Medicare?
- Larry Nathanson is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Larry Nathanson's NPI active?
- Yes — Larry Nathanson's NPI (1740220276) is active in the NPPES registry as of the last update on 2022-02-16.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.