1. Home
  2. Directory
  3. Oregon
  4. City
  5. Internal Medicine
  6. NPI Profile

STEVEN JON MASON MD
NPI 1174519524
Internal Medicine - Gastroenterology in Oregon City, OR

Active since September 21, 2005
1508 DIVISION ST, STE 15, OREGON CITY, OR 97045(503) 692-3750(503) 691-2324 Get Directions Write a Review

NPPES record last updated: October 11, 2013. Verified against the NPPES registry weekly; last sync: August 02, 2026.

About Steven Jon Mason Md NPPES

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

STEVEN JON MASON MD (NPI 1174519524) is an individual gastroenterology provider in Oregon City, Oregon, licensed in Oregon (MD10313) and active in the NPI registry since September 2005.

NPPES Registry Identity

NPI1174519524
Entity TypeIndividualMale
Primary Taxonomy207RG0100X
Provider Legal NameSTEVEN JON MASONCredential: MD
Location Address1508 DIVISION ST, STE 15Oregon City, OR 97045-1582
Mailing Address847 Ne 19th Ave, Suite 300Portland, OR 97232-2684 · (503) 963-2801 · Fax (503) 963-2825
Phone(503) 692-3750
Fax(503) 691-2324
Sole ProprietorNo
Enumeration DateSeptember 21, 2005
Last NPPES UpdateOctober 11, 2013
✔ NPI 1174519524 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses

★ Primary SpecialtyInternal Medicine · GastroenterologyAllopathic & Osteopathic Physicians
Taxonomy Code207RG0100X
License✔ Licensed in OR · MD10313
Definition
An internist who specializes in diagnosis and treatment of diseases of the digestive organs including the stomach, bowels, liver and gallbladder. This specialist treats conditions such as abdominal pain, ulcers, diarrhea, cancer and jaundice and performs complex diagnostic and therapeutic procedures using endoscopes to visualize internal organs.
1508 DIVISION ST, Oregon City, OR 97045
Open in Google Maps ↗

Other Names 1

Other Name (5)S Jon Mason Md

Other Identifiers 7

Medicaid1174519524WA
Medicare PIN171073OR
Medicare PIN171074OR
Medicare ID-Type Unspecified00WCGSMA
Medicaid211599OR
Medicare PIN171918OR
Medicare UPIND73063

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.

DR. MICHELE QUINN MD
Obstetrics & Gynecology
1508 DIVISION ST, SUITE 205
OREGON CITY, OR 97045
Clackamas County (503) 657-1071
DR. FREDERICK G SCHMIDT M.D.
Obstetrics & Gynecology (Obstetrics)
1508 DIVISION ST, SUITE 205
OREGON CITY, OR 97045
Clackamas County (503) 657-1071
CHUN-YANG MICHAEL CHANG MD
Internal Medicine (Gastroenterology)
1508 DIVISION ST, STE 15
OREGON CITY, OR 97045
Clackamas County (503) 692-3750
MICHAEL FRANK SHEFFIELD MD
Internal Medicine (Gastroenterology)
1508 DIVISION ST, STE 15
OREGON CITY, OR 97045
Clackamas County (503) 692-3750
MARNY LOUISE LAWSON CNM, NP
Advanced Practice Midwife
1508 DIVISION ST, STE 205
OREGON CITY, OR 97045
Clackamas County (503) 657-1071
MONINA FARRAH RAMOS PASCUA MD
Internal Medicine (Gastroenterology)
1508 DIVISION ST, STE 15
OREGON CITY, OR 97045
Clackamas County (503) 692-3750
ANNA MARIAN TUBMAN MD
Family Medicine
1508 DIVISION ST, SUITE 25, PLAZA 2
OREGON CITY, OR 97045
Clackamas County (503) 659-4988
GASTROENTEROLOGY SPECIALISTS OF OREGON PC
Internal Medicine (Gastroenterology)
1508 DIVISION ST, SUITE 15
OREGON CITY, OR 97045
Clackamas County (503) 657-5555

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 Steven Mason's NPI number?

The NPI number for Steven Mason is 1174519524. It was assigned to this individual provider in the NPPES registry on September 21, 2005. The provider is also known as S Jon Mason MD.

Where is Steven Mason located?

Steven Mason practices at 1508 Division St Ste 15, Oregon City, OR 97045. The listed phone number is (503) 692-3750.

What is Steven Mason's specialty?

The primary specialty registered for this NPI is Internal Medicine, specializing in Gastroenterology, with taxonomy code 207RG0100X.

When was this NPI record last updated?

The NPPES record for Steven Mason was last updated on October 11, 2013. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 12 years 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.