Dr. John Alexander Mills , MD
Internal Medicine • Boston, MA
Notice of NPI Deactivation & Inactive Practice Status
According to official public domain records published by CMS (Centers for Medicare & Medicaid Services) in the National Provider Identifier (NPPES) Registry, Dr. John Mills has officially deactivated this NPI record and ceased active healthcare practice.
Professional Overview & Biography Verified Profile Summary
Dr. John Mills, MD was a registered Internal Medicine practicing in Boston, MA. Throughout an active medical career spanning 20 years, Dr. Mills provided care at the practice location at 55 FRUIT ST until profile deactivation on 2025-05-08.
Practice Location & Contact Primary Location
55 Fruit St
Yaw 2100 Rheumatology Associates
Boston, MA 021142621
Specialty Benchmarks & Practice Insights
Comparative analytics for Internal Medicine in Boston, MA
Practicing in Boston, MA (7127 Statewide)
In-Person Office Visits Only
Under CMS Medicare Fee Schedule vs Standard Submitted Charges
Medical Specialties & State Licenses
NUCC Taxonomy Code: 207R00000X
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.
Practice Associates & Co-Workers
Healthcare professionals and specialists practicing at this location or sharing practice phone/fax
Internal Medicine - Rheumatology
Doctor of Medicine (M.D.)
Internal Medicine - Rheumatology
Doctor of Medicine (M.D.)
Internal Medicine - Rheumatology
Bachelor of Medicine, Bachelor of Surgery (M.B.B.S.)
Physician Assistant - Medical
Physician Assistant (Certified)
Internal Medicine - Rheumatology
Doctor of Medicine (M.D.)
Internal Medicine
Doctor of Medicine (M.D.)
Career & Practice History Timeline
Chronological log of verified NPI updates, location relocations, credentials, and registry changes
Record deactivated on May 08, 2025
NPI status registered as active in NPPES database
Registered at 55 FRUIT ST, YAW 2100 RHEUMATOLOGY ASSOCIATES, BOSTON, MA 021142621 (Tel: 6177267938)
Registered at PO BOX 9142, MASS GENERAL PHYSICIAN ORGANIZATION, CHARLESTOWN, MA 021299142 (Tel: 6177240287)
Recorded as JOHN MILLS, MD
Internal Medicine (License #26570 in MA)
First registered as active Individual Practitioner in NPPES Database.
Patient & Community Reviews
Verified patient ratings, medical care experiences, and facility photos
Sign in to leave a review for Dr. John Mills
Only verified registered users can submit ratings, post feedback, and upload facility photos.
NPI Administrative Meta
Mailing Address
Po Box 9142, Mass General Physician Organization
Charlestown, MA 021299142
Phone: 6177240287
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.