DR. COLIN E DIFFIE MD
NPI 1942616404
Internal Medicine - Rheumatology in Saint Louis, MO
About Dr. Colin E Diffie Md NPPES
Official registry information on file with the National Plan and Provider Enumeration System.
DR. COLIN E DIFFIE MD (NPI 1942616404) is an individual rheumatology provider in Saint Louis, Missouri, licensed in Missouri (2019017299) and active in the NPI registry since July 2014. He is enrolled in Medicare PECOS, is affiliated with Memorial Hospital, and maintains a secondary practice location in Saint Louis.
NPPES Registry Identity
Specialties & Licenses 2
An internist who treats diseases of joints, muscle, bones and tendons. This specialist diagnoses and treats arthritis, back pain, muscle strains, common athletic injuries and collagen diseases.
Secondary Practice Location 1
Other Identifiers 1
Accepted Insurance
Medicare Participation & PECOS CMS
Medicare enrollment, assignment, and ordering and referring status from the CMS PECOS system.
Medicare Enrollment Status
Enrolled in Medicare and accepts Medicare assignment
Dr. Colin E Diffie Md is registered in PECOS and agrees to accept the Medicare-approved amount as full payment. Medicare patients are not billed beyond the standard deductible and coinsurance.
Areas of Expertise CMS Part B claims 13
Services this provider delivered to Medicare fee-for-service patients, from the CMS Medicare utilization data. Higher counts generally reflect more experience with a service; care delivered outside Medicare is not included.
Hospital Affiliations CMS Care Compare 4
Hospitals where this provider delivers care, identified from recent Medicare claims and place-of-service records.
Memorial Hospital
Acute Care Hospitals · Belleville, ILBarnes Jewish Hospital
Acute Care Hospitals · Saint Louis, MOBarnes-Jewish West County Hospital
Acute Care Hospitals · Creve Coeur, MOParkland Health Center
Acute Care Hospitals · Farmington, MOPhysician Visit Costs CMS claims · ZIP area
Typical Medicare office-visit costs in the 63106 ZIP code area, from fee-for-service claims. These are area statistics, not this provider’s prices; actual charges vary by service and coverage.
Medicare Quality Performance CMS QPP · MIPS
Performance in the CMS Quality Payment Program: the MIPS final score across four weighted categories, and the individual quality measures reported to Medicare.
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.
SAINT LOUIS, MO 63106
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 Colin Diffie's NPI number?
The NPI number for Colin Diffie is 1942616404. It was assigned to this individual provider in the NPPES registry on July 5, 2014.
Where is Colin Diffie located?
Colin Diffie practices at 915 N Grand Blvd, Saint Louis, MO 63106. The listed phone number is (314) 652-4100.
What is Colin Diffie's specialty?
The primary specialty registered for this NPI is Internal Medicine, specializing in Rheumatology, with taxonomy code 207RR0500X.
Is Colin Diffie enrolled in Medicare?
Yes. Colin Diffie is registered in the Medicare PECOS system and accepts Medicare assignment, which means accepting the Medicare-approved amount as payment in full for covered services.
What insurance does Colin Diffie accept?
Health plans from Cox HealthPlans list Colin Diffie as in-network in at least one marketplace plan. Coverage varies by plan and year; verify with the insurer or the provider before a visit.
Is Colin Diffie affiliated with any hospitals?
According to CMS data, Colin Diffie is affiliated with Memorial Hospital, Barnes Jewish Hospital, Barnes-Jewish West County Hospital and Parkland Health Center.
When was this NPI record last updated?
The NPPES record for Colin Diffie was last updated on September 11, 2025. NPI Profile syncs with the weekly NPPES data releases published by CMS.
