Evan Gwyn, M.D.
NPI 1154558500 · Internal Medicine Physician · Boston, MA
Enrolled with Medicare as Practitioner - Internal Medicine · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Evan Gwyn, M.D. is a Internal Medicine Physician provider in Boston, MA (NPI 1154558500).
Provider details
- NPI number
- 1154558500
- Entity type
- Individual
- Primary specialty
- Internal Medicine PhysicianAllopathic & Osteopathic Physicians
- Credential
- M.D.
- Sex
- Male
- Sole proprietor
- No
- License
- 240175 (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
17 yrs in NPPES registry
- Profile completeness28% of score
100% of core fields populated
- Practice footprint17% of score
4 documented practice locations
- Medicare service volume (vs. specialty peers)28% of score
96 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) |
|---|---|---|
| Subsequent Hospital Care With Moderate Levelof Medical Decision Making, If Using Time, at Least 35 Minutes99232 | 62 | $82 |
| Subsequent Hospital Care With Moderate Levelof Medical Decision Making, If Using Time, at Least 50 Minutes99233 | 34 | $123 |
Typical Medicare-allowed amounts for these services range $82–$123 (2024). The Medicare-allowed amount is what Medicare recognizes for a service under fee-for-service — a reference figure for 2024, not a price quote and not what you would be billed. Medicare Part B covers roughly an eighth of all NPIs (65+ skew); services with fewer than 11 beneficiaries are suppressed by CMS. Source: CMS Medicare Physician & Other Practitioners, by Provider & Service.
Practice location
Mailing address
Additional practice locations (3)
- 330 Brookline AveDeaconess 311Boston, MA 02215-5400Phone: (504) 669-3411
- 75 Francis StBoston, MA 02115-6110Phone: (617) 732-5500
- 1153 Centre StJamaica Plain, MA 02130-3446Phone: (617) 983-7000
Registry dates
- Enumerated
- 2009-06-12
- Last updated
- 2025-12-29
- Certified
- 2025-12-29
Frequently asked questions
- What is Evan Gwyn's NPI number?
- Evan Gwyn's National Provider Identifier (NPI) is 1154558500, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Evan Gwyn's specialty?
- Evan Gwyn is listed in the NPPES registry with a primary specialty of Internal Medicine Physician (Allopathic & Osteopathic Physicians).
- Where is Evan Gwyn located?
- Evan Gwyn's practice location on file with NPPES is 55 Fruit Street, Boston, MA 02114.
- What is Evan Gwyn's phone number?
- The practice phone number listed in the NPPES registry for Evan Gwyn is (617) 724-3874.
- Does Evan Gwyn accept Medicare?
- Evan Gwyn is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Evan Gwyn's NPI active?
- Yes — Evan Gwyn's NPI (1154558500) is active in the NPPES registry as of the last update on 2025-12-29.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.