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Active NPI 1033109202 Individual Practitioner Male Practitioner

Dr. John Leclerc Walsh , MD

Anesthesiology • Boston, MA

✓ Accepts Medicare Assignment

Professional Overview & Biography Verified Profile Summary

Dr. John Walsh, MD is a certified Anesthesiology practicing in Boston, MA. With approximately 34 years of clinical experience since graduating from Yale University School Of Medicine in 1992, Dr. Walsh delivers high-quality medical care to the local community at 55 FRUIT ST.

Dr. Walsh is affiliated with Massachusetts General Physicians Organization Inc and accepts Medicare assignment.

Frequently performed procedures and clinical services include anesthesia for procedure in upper abdomen including use of an endoscope, anesthesia for procedure in lower abdominal cavity including use of an endoscope, anesthesia for procedure on skin of arms, legs, or trunk. Full Medicare procedure pricing transparency rates and service volume details are listed on this profile.

Practice Location & Contact Primary Location

Practice Address

55 Fruit St
Cln 3 Anesthesia Associates

Boston, MA 021142696

Telephone 6177262067
Fax 6177267536
Associated Practice Facility / Clinic

Medicare Profile & Education

Medical School

Yale University School Of Medicine

Graduation Year

1992

Medicare Assignment

✓ Accepts Assignment

Telehealth Flag

In-Person Only

Specialty Benchmarks & Practice Insights

Comparative analytics for Anesthesiology in Boston, MA

Senior Veteran Specialist (>20 Yrs)
Practitioner Clinical Experience
34 Yrs +15.8 yrs vs City Avg
City Avg: 18.2 Yrs
State Avg: 27.4 Yrs
Regional Practice Density
1102 Specialists

Practicing in Boston, MA (2146 Statewide)

Telehealth Adoption Rate
1.7% Regional Adoption

In-Person Office Visits Only

Medicare Pricing Discount
87.7% Avg Savings

Under CMS Medicare Fee Schedule vs Standard Submitted Charges

Clinical Seniority & Experience Comparison

Dr. Walsh (34 Years) 34 Yrs
Boston Specialty Average (18.2 Years) 18.2 Yrs

Performed Procedures & Service Volume

Top Medicare Part B procedures performed by this practitioner

CMS Official Data (2024)
Reporting Year:
HCPCS Code & Description Services Patients Submitted Charge Medicare Allowed
00790 Anesthesia for procedure in upper abdomen including use of an endoscope
17 17 $2439.88 $299.71

Medical Specialties & State Licenses

Anesthesiology Primary Specialty

NUCC Taxonomy Code: 207L00000X

State License MA 78512

An anesthesiologist is trained to provide pain relief and maintenance, or restoration, of a stable condition during and immediately following an operation or an obstetric or diagnostic procedure. The anesthesiologist assesses the risk of the patient undergoing surgery and optimizes the patient's condition prior to, during and after surgery. In addition to these management responsibilities, the anesthesiologist provides medical management and consultation in pain management and critical care medicine. Anesthesiologists diagnose and treat acute, long-standing and cancer pain problems; diagnose and treat patients with critical illnesses or severe injuries; direct resuscitation in the care of patients with cardiac or respiratory emergencies, including the need for artificial ventilation; and supervise post-anesthesia recovery.

Additional State Medicaid & Healthcare Payer Identifiers

Medicaid State Provider ID
3166945 (MA)
Commercial Insurance / Payer ID Tufts Health Plan
772238 (MA)
Commercial Insurance / Payer ID Bcbs Ma
J17742 (MA)

Hospital & Practice Group Affiliations

Massachusetts General Physicians Organization Inc

55 Fruit St, Boston, MA 021142696

Phone: 6177240287

Practice Associates & Co-Workers

Healthcare professionals and specialists practicing at this location or sharing practice phone/fax

31 Associated Practitioners
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NPI 1144297193

Doctor of Medicine (M.D.)

NPI 1174514772

Doctor of Medicine (M.D.)

Dr. Letty Liu , MD

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NPI 1205803848

Doctor of Medicine (M.D.)

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MDPHD

Career & Practice History Timeline

Chronological log of verified NPI updates, location relocations, credentials, and registry changes

6 Historical Events
NPI Profile Active July 08, 2007

NPI status registered as active in NPPES database

📍
Updated Practice Location July 08, 2007

Registered at 55 FRUIT ST, CLN 3 ANESTHESIA ASSOCIATES, BOSTON, MA 021142696 (Tel: 6177262067)

📍
Updated Business Mailing Address July 08, 2007

Registered at PO BOX 9142, MASS GENERAL PHYSICIAN ORGANIZATION, CHARLESTOWN, MA 021299142 (Tel: 6177240287)

👤
Provider Name / Credentials Updated July 08, 2007

Recorded as JOHN WALSH, MD

🎓
Medical Taxonomy / Specialty Registered (Primary Specialty) July 08, 2007

Anesthesiology (License #78512 in MA)

🟢
Initial NPI Registration & Enumeration October 27, 2005

First registered as active Individual Practitioner in NPPES Database.

Patient & Community Reviews

Verified patient ratings, medical care experiences, and facility photos

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NPI Administrative Meta

NPI Number: 1033109202
Entity Type:
Individual Provider Physician, Nurse Practitioner, or Solo Healthcare Professional (Type 1 NPI)
Enumeration Date: October 27, 2005
Last Update: July 13, 2026
Sole Proprietor: No

Mailing Address

Po Box 9142, Mass General Physician Organization

Charlestown, MA 021299142

Phone: 6177240287

Public Domain Record This profile contains public domain information published by CMS and NPPES under the Freedom of Information Act (FOIA).
⚠️ Medical Disclaimer

This directory listing is for informational purposes only and does not constitute medical advice, diagnosis, or physician endorsement. If you are experiencing a medical emergency, please call 911 immediately.