DR. COLIN E DIFFIE MD NPI 1942616404

NPI Information

  • NPI: 1942616404
  • Provider Name: DR. COLIN E DIFFIE, MD
  • Classification: Internal Medicine - 207RR0500X
  • Specialization: Rheumatology
  • Entity Type: Individual
  • PECOS Registration: Yes
  • Address: 915 N GRAND BLVD
    SAINT LOUIS, MO
    ZIP 63106
  • Phone: (314) 652-4100

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NPI Details

DR. Colin E Diffie, MD is a rheumatology internal medicine in Saint Louis, MO with 12 years of experience. The provider is 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. DR. Colin E Diffie, MD NPI is 1942616404. The provider is registered as an individual entity type.

The NPPES NPI record indicates the provider is a male.

The provider's business location address is:

915 N GRAND BLVD
SAINT LOUIS, MO
ZIP 63106-621
Phone: (314) 652-4100
Fax: (314) 289-6442

The NPI 1942616404 is registered in the Medicare Provider, Enrollment, Chain and Ownership System (PECOS). The provider is legally eligible to order and refer Part B (Clinical Laboratory and Imaging), Durable Medical Equipment, Part A Home Health Agency (HHA), Power Mobility Devices.

The following top HCPCS codes were publicly reported for this provider under the Medicare program for the year 2016. The reported codes are based on the top codes for each available Medicare specialty, excluding evaluation and management codes.

  • Injection, darbepoetin alfa, 1 microgram (non-esrd use) (HCPCS:J0881)
  • Injection, denosumab, 1 mg (HCPCS:J0897)
  • Established patient office or other outpatient visit, 30-39 minutes (HCPCS:99214)
  • Injection, triamcinolone acetonide, not otherwise specified, 10 mg (HCPCS:J3301)
  • Injection of drug or substance under skin or into muscle (HCPCS:96372)
  • Infusion into a vein for therapy, prevention, or diagnosis, 1 hour or less (HCPCS:96365)
  • Established patient office or other outpatient visit, 20-29 minutes (HCPCS:99213)
  • Infusion into a vein for therapy, prevention, or diagnosis, each additional hour (HCPCS:96366)
  • Established patient office or other outpatient visit, 40-54 minutes (HCPCS:99215)
  • Injection, methylprednisolone acetate, 40 mg (HCPCS:J1030)
  • Aspiration and/or injection of fluid large joint using ultrasound guidance (HCPCS:20611)
  • New patient office or other outpatient visit, 45-59 minutes (HCPCS:99204)
  • Aspiration and/or injection of fluid from large joint (HCPCS:20610)
  • Telephone medical discussion with physician, 21-30 minutes (HCPCS:99443)
  • Complete ultrasound scan of joint (HCPCS:76881)
  • Injection, tixagevimab and cilgavimab, for the pre-exposure prophylaxis only, for certain adults and pediatric individuals (12 years of age and older weighing at least 40kg) with no known sars-cov-2 exposure, who either have moderate to severely compromise (HCPCS:M0220)
  • New patient office or other outpatient visit, 60-74 minutes (HCPCS:99205)

The enumeration date for this NPI number is 7/5/2014 and was last updated on 9/11/2025.

Taxonomy Codes

The NPI record includes the healthcare provider taxonomy classification, state license number and state of licensure. The following information regarding the scope of practice of this provider is available:

No. Taxonomy Code Taxonomy Clasification Taxonomy Specialization License Number License State Primary
1207RR0500XInternal MedicineRheumatology2019017299MISSOURIYes
2207R00000XInternal Medicine2019017299MISSOURINo

Other Identifiers

The following information regarding additional identifiers associated to this NPI record includes the other identifier number, identifier type, identifier state and issuer.

No. Other Provider Identifier Other Provider Identifier Type Other Provider Identifier State Other Provider Identifier Issuer
1200061863MEDICAIDMISSOURI

What is NPI?

NPI stands for National Provider Identifier. The NPI is a 10-digit identification number that is completely unique. The NPI number by itself does not contain any identifiable information such as a provider’s speciality or location. The NPI is assigned to individuals or organizacions for their lifespan and it is independent of key provider information type updates like a change of practices, location or speciality.

This page was last updated on: 11/21/2025

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