Recently Updated NPI Information — some details in this NPI profile have been updated in the NPI registry within the last 60 days.

RONALD HENRY GEIGER MD
NPI 1386633154
Orthopaedic Surgery in Cambridge, MA

Active since October 14, 2005
300 MOUNT AUBURN ST, STE 505, CAMBRIDGE, MA 02138(617) 491-6766(617) 491-2552 Get Directions Write a Review

NPPES record last updated: July 13, 2026. Verified against the NPPES registry weekly; last sync: August 09, 2026.

About Ronald Henry Geiger Md NPPES

Official registry information on file with the National Plan and Provider Enumeration System.

RONALD HENRY GEIGER MD (NPI 1386633154) is an individual orthopaedic surgery provider in Cambridge, Massachusetts, licensed in Massachusetts (30091) and active in the NPI registry since October 2005.

NPPES Registry Identity

NPI1386633154
Entity TypeIndividualMale
Primary Taxonomy207X00000X
Provider Legal NameRONALD HENRY GEIGERCredential: MD
Location Address300 MOUNT AUBURN ST, STE 505Cambridge, MA 02138-5600
Mailing Address300 Mount Auburn St, Ste 505Cambridge, MA 02138-5600 · (617) 491-6766 · Fax (617) 491-2552
Fax(617) 491-2552
Sole ProprietorNo
Enumeration DateOctober 14, 2005
Last NPPES UpdateJuly 13, 2026
NPI 1386633154 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses

Primary SpecialtyOrthopaedic SurgeryAllopathic & Osteopathic Physicians
Taxonomy Code207X00000X
License Licensed in MA · 30091
Definition
An orthopaedic surgeon is trained in the preservation, investigation and restoration of the form and function of the extremities, spine and associated structures by medical, surgical and physical means. An orthopaedic surgeon is involved with the care of patients whose musculoskeletal problems include congenital deformities, trauma, infections, tumors, metabolic disturbances of the musculoskeletal system, deformities, injuries and degenerative diseases of the spine, hands, feet, knee, hip, shoulder and elbow in children and adults. An orthopaedic surgeon is also concerned with primary and secondary muscular problems and the effects of central or peripheral nervous system lesions of the musculoskeletal system.
300 MOUNT AUBURN ST, Cambridge, MA 02138

Other Identifiers 1

Medicaid2070367MA

Other Providers at the Same Location NPPES 20

Providers registered at the same practice address, or within the immediate area, according to the NPPES registry.

Internal Medicine (Nephrology)
300 MOUNT AUBURN ST, SUITE 515
CAMBRIDGE, MA 02138
Urology
300 MOUNT AUBURN ST, STE 519
CAMBRIDGE, MA 02138
Internal Medicine (Hematology & Oncology)
300 MOUNT AUBURN ST, HEMA/ONC
CAMBRIDGE, MA 02138
Nurse Practitioner (Family)
300 MOUNT AUBURN ST
CAMBRIDGE, MA 02138
Otolaryngology
300 MOUNT AUBURN ST, SUITE 308
CAMBRIDGE, MA 02138
Surgery
300 MOUNT AUBURN ST, SUITE 407
CAMBRIDGE, MA 02138
Ophthalmology
300 MOUNT AUBURN ST
CAMBRIDGE, MA 02138
Internal Medicine (Gastroenterology)
300 MOUNT AUBURN ST
CAMBRIDGE, MA 02138

Frequently Asked Questions NPPES & CMS

Common questions about this NPI record, answered from the official NPPES registry and CMS datasets shown on this page.

What is Ronald Geiger's NPI number?

The NPI number for Ronald Geiger is 1386633154. It was assigned to this individual provider in the NPPES registry on October 14, 2005.

Where is Ronald Geiger located?

Ronald Geiger practices at 300 Mount Auburn St Ste 505, Cambridge, MA 02138. The listed phone number is (617) 491-6766.

What is Ronald Geiger's specialty?

The primary specialty registered for this NPI is Orthopaedic Surgery with taxonomy code 207X00000X.

When was this NPI record last updated?

The NPPES record for Ronald Geiger was last updated on July 13, 2026. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 30 days ago. If this record has changed at CMS more recently, you can request an on-demand re-check against the live CMS registry, directly from this page.