Independent US Healthcare Provider Directory & Public Medical Database
Active NPI 1265476782 Individual Practitioner Male Practitioner

Dr. Mark R. Selby , DO

Internal Medicine • Pittsfield, MA

Professional Overview & Biography Verified Profile Summary

Dr. Mark Selby, DO is a registered healthcare professional specializing in Internal Medicine in Pittsfield, MA. Practice services are available at 73 EAGLE ST under active NPI credentials.

Practice Location & Contact Primary Location

Practice Address

73 Eagle St

Pittsfield, MA 012014714

Telephone 4134992672
Fax 4134478825

Specialty Benchmarks & Practice Insights

Comparative analytics for Internal Medicine in Pittsfield, MA

Active Practitioner
Practitioner Clinical Experience
Active
City Avg: 24.3 Yrs
State Avg: 29.3 Yrs
Regional Practice Density
65 Specialists

Practicing in Pittsfield, MA (7127 Statewide)

Telehealth Adoption Rate
21.5% Regional Adoption

In-Person Office Visits Only

Medicare Pricing Discount
67.4% Avg Savings

Under CMS Medicare Fee Schedule vs Standard Submitted Charges

Medical Specialties & State Licenses

Internal Medicine Primary Specialty

NUCC Taxonomy Code: 207R00000X

State License MA MA43107

A physician who provides long-term, comprehensive care in the office and the hospital, managing both common and complex illness of adolescents, adults and the elderly. Internists are trained in the diagnosis and treatment of cancer, infections and diseases affecting the heart, blood, kidneys, joints and digestive, respiratory and vascular systems. They are also trained in the essentials of primary care internal medicine, which incorporates an understanding of disease prevention, wellness, substance abuse, mental health and effective treatment of common problems of the eyes, ears, skin, nervous system and reproductive organs.

Additional State Medicaid & Healthcare Payer Identifiers

Commercial Insurance / Payer ID Id#
2464892 (MA)

Practice Associates & Co-Workers

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

2 Associated Practitioners
Jennifer Summers , LICSW

Social Worker - Clinical

NPI 1710998257

Licensed Independent Clinical Social Worker

Kim Dewitt , LICSW

Social Worker - Clinical

NPI 1750565511

Licensed Independent Clinical Social Worker

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 73 EAGLE ST, PITTSFIELD, MA 012014714 (Tel: 4134992672)

📍
Updated Business Mailing Address July 08, 2007

Registered at PO BOX 1007, ASHFIELD, MA 013301007 (Tel: 4134992672)

👤
Provider Name / Credentials Updated July 08, 2007

Recorded as MARK SELBY, D.O.

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

Internal Medicine (License #MA43107 in MA)

🟢
Initial NPI Registration & Enumeration June 15, 2006

First registered as active Individual Practitioner in NPPES Database.

Patient & Community Reviews

Verified patient ratings, medical care experiences, and facility photos

0 Reviews
No patient reviews submitted yet for Dr. Mark Selby. Be the first to share your experience!

Sign in to leave a review for Dr. Mark Selby

Only verified registered users can submit ratings, post feedback, and upload facility photos.

NPI Administrative Meta

NPI Number: 1265476782
Entity Type:
Individual Provider Physician, Nurse Practitioner, or Solo Healthcare Professional (Type 1 NPI)
Enumeration Date: June 15, 2006
Last Update: July 13, 2026
Sole Proprietor: No

Mailing Address

Po Box 1007

Ashfield, MA 013301007

Phone: 4134992672

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.