Erin Leahy, M.D.
NPI 1235339607 · Geriatric Medicine (Internal Medicine) Physician · Springfield, MA
Enrolled with Medicare as Practitioner - Internal Medicine · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Erin Leahy, M.D. is a Geriatric Medicine (Internal Medicine) Physician provider in Springfield, MA (NPI 1235339607).
Provider details
- NPI number
- 1235339607
- Entity type
- Individual
- Primary specialty
- Geriatric Medicine (Internal Medicine) PhysicianAllopathic & Osteopathic Physicians
- Credential
- M.D.
- Sex
- Female
- Sole proprietor
- No
- License
- 243564 (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 tenure28% of score
19 yrs in NPPES registry
- Profile completeness28% of score
100% of core fields populated
- Practice footprint17% of score
1 documented practice location
- Medicare service volume (vs. specialty peers)28% of score
314 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) |
|---|---|---|
| Prolonged Office Or Other Outpatient Evaluation and Management Service(s) Beyond the Maximum Required Time of the Primary Procedure Which Has Been Selected Using Total Time on the Date of the Primary Service; Each Additional 15 Minutes By the Physician OrG2212 | 177 | $29 |
| Administration of Psychological Or Neuropsychological Test By Technician, Each Additional 30 Minutes96139 | 60 | $33 |
| New Patient Office Or Other Outpatient Visit With a High Level of Medical Decision Making, If Using Time, 60 Minutes Or More99205 | 25 | $167 |
| Administration of Psychological Or Neuropsychological Test By Technician, First 30 Minutes96138 | 21 | $32 |
| Established Patient Office Or Other Outpatient Visit With High Level of Medical Decision Making, If Using Time, 40 Minutes Or More99215 | 19 | $134 |
What this provider prescribes (Medicare Part D)
Top drugs by Medicare Part D claim volume, 2024 · 7 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Donepezil Hcl | 199 | 52 |
| Memantine Hcl | 195 | 35 |
| Sertraline Hcl | 69 | 11 |
| Aripiprazole | 28 | — |
| Mirtazapine | 19 | — |
| Escitalopram Oxalate | 11 | — |
| Trazodone Hcl | 11 | — |
Practice location
Mailing address
Registry dates
- Enumerated
- 2007-07-23
- Last updated
- 2021-06-08
- Certified
- 2021-06-08
Frequently asked questions
- What is Erin Leahy's NPI number?
- Erin Leahy's National Provider Identifier (NPI) is 1235339607, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Erin Leahy's specialty?
- Erin Leahy is listed in the NPPES registry with a primary specialty of Geriatric Medicine (Internal Medicine) Physician (Allopathic & Osteopathic Physicians).
- Where is Erin Leahy located?
- Erin Leahy's practice location on file with NPPES is 759 Chestnut St, Springfield, MA 01107-1619.
- What is Erin Leahy's phone number?
- The practice phone number listed in the NPPES registry for Erin Leahy is (413) 794-8121.
- Does Erin Leahy accept Medicare?
- Erin Leahy is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Erin Leahy's NPI active?
- Yes — Erin Leahy's NPI (1235339607) is active in the NPPES registry as of the last update on 2021-06-08.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.