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

MR. ROBERT KNOX MASSIE DDS
NPI 1619961612
Dentist in Saint Louis, MO

Q: What is Robert Massie's NPI number?

The NPI number for Robert Massie is 1619961612. It was assigned to this individual provider in the NPPES registry on September 6, 2005.

Q: What is Robert Massie's specialty?

The primary specialty registered for this NPI is Dentist with taxonomy code 122300000X.

Q: When was this NPI record last updated?

The NPPES record for Robert Massie 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 54 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.

Active since September 06, 2005

401 HOLLY HILLS AVE, SAINT LOUIS, MO 63111(314) 481-1615(314) 353-1310 Get Directions Write a Review

NPPES record last updated: July 13, 2026. Verified against the NPPES registry weekly; last sync: August 30, 2026.

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About Mr. Robert Knox Massie Dds NPPES

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

MR. ROBERT KNOX MASSIE DDS (NPI 1619961612) is an individual dentist in Saint Louis, Missouri, licensed in Missouri (2001005623) and active in the NPI registry since September 2005.

NPPES Registry Identity

NPI1619961612

Entity TypeIndividualMale

Primary Taxonomy122300000X

Provider Legal NameMR. ROBERT KNOX MASSIECredential: DDS

Location Address401 HOLLY HILLS AVESaint Louis, MO 63111-2410

Mailing Address401 Holly Hills AveSaint Louis, MO 63111-2410 · (314) 481-1615 · Fax (314) 353-1310

Phone(314) 481-1615

Fax(314) 353-1310

Sole ProprietorNo

Enumeration DateSeptember 6, 2005

Last NPPES UpdateJuly 13, 2026

✔ NPI 1619961612 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses

★ Primary SpecialtyDentistDental Providers

Taxonomy Code122300000X

License✔ Licensed in MO · 2001005623

Definition

A dentist is a person qualified by a doctorate in dental surgery (D.D.S.) or dental medicine (D.M.D.), licensed by the state to practice dentistry, and practicing within the scope of that license. There is no difference between the two degrees: dentists who have a DMD or DDS have the same education. Universities have the prerogative to determine what degree is awarded. Both degrees use the same curriculum requirements set by the American Dental Association's Commission on Dental Accreditation. Generally, three or more years of undergraduate education plus four years of dental school is required to graduate and become a general dentist. State licensing boards accept either degree as equivalent, and both degrees allow licensed individuals to practice the same scope of general dentistry. Additional post-graduate training is required to become a dental specialist.

401 HOLLY HILLS AVE, Saint Louis, MO 63111

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