RONALD E MASON MD
NPI 1124088430
Internal Medicine - Gastroenterology in Kirkland, WA

Active since March 23, 2006PECOS EnrolledAccepts Medicare Assignment
79.97/100
CMS Quality Rating
11800 NE 128TH ST, SUITE 100, KIRKLAND, WA 98034(425) 899-4500(425) 899-4510 Get Directions Write a Review

NPPES record last updated: March 25, 2014. Verified against the NPPES registry weekly; last sync: July 26, 2026.

About Ronald E Mason Md NPPES

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

RONALD E MASON MD (NPI 1124088430) is an individual gastroenterology provider in Kirkland, Washington, licensed in Washington (MD00042393) and active in the NPI registry since March 2006. He is enrolled in Medicare PECOS, is affiliated with Evergreenhealth Medical Center, and is a graduate of University Of Alabama School Of Medicine (1986).

NPPES Registry Identity

NPI1124088430
Entity TypeIndividualMale
Primary Taxonomy207RG0100X
Provider Legal NameRONALD E MASONCredential: MD
Location Address11800 NE 128TH ST, SUITE 100Kirkland, WA 98034-7201
Mailing AddressPo Box 34888Seattle, WA 98124-1888 · (425) 977-4620 · Fax (425) 745-9836
Fax(425) 899-4510
Sole ProprietorNo
Medical School CMSUniversity Of Alabama School Of MedicineGraduated 1986
Enumeration DateMarch 23, 2006
Last NPPES UpdateMarch 25, 2014
NPI 1124088430 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 WA · MD00042393
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.
11800 NE 128TH ST, Kirkland, WA 98034

Other Identifiers 3

Medicaid1003010WA
Other0172754WA · Labor And Industries
Medicare PING8802878WA

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

Ronald E Mason 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.

PECOS PAC ID1456334663
PECOS Enrollment IDI20040609000970
Eligible to Order & Refer Part B Labs & Imaging Durable Medical Equipment Home Health Agency Power Mobility DevicesPer the CMS Ordering and Referring file. Eligibility means Medicare pays claims that this provider orders or refers for these categories.

Areas of Expertise CMS Part B claims 8

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.

Biopsy of large bowel using a flexible endoscope 45380
A biopsy of the large bowel using a flexible endoscope is a procedure where a thin, flexible tube with a camera is inserted through the rectum to examine the bowel. If abnormal tissue is found, a small sample is taken for further examination. This helps in diagnosing conditions like inflammation, polyps, or cancer.
96 services96 patients
Established patient office or other outpatient visit with low level od decision making, if using time, 20 minutes or more 99213
This is a routine visit for patients who have already been seen by the healthcare provider. During this approximately 20-29 minute appointment, your health status will be evaluated and any necessary treatments or tests will be discussed. It's a chance to address any health concerns you may have.
74 services61 patients
Established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more 99214
This is a routine check-up for patients who have previously visited our clinic. It involves a comprehensive review of your health and any ongoing treatments. The consultation lasts between 30-39 minutes, allowing enough time to discuss any concerns.
48 services43 patients
New patient office or other outpatient visit with moderate level of medical decision making, if using time, 45 minutes or more 99204
This is a first-time office or outpatient visit lasting between 45-59 minutes. The healthcare provider evaluates your health, discusses your medical history, and may suggest further tests or treatments. It's an opportunity to ask questions and understand your health better.
40 services40 patients
Biopsy of esophagus, stomach, and/or upper small bowel using a flexible endoscope 43239
This procedure involves using a thin, flexible tube with a light and camera, known as an endoscope, to examine the esophagus, stomach, and upper part of the small intestine. Small tissue samples are taken for further examination to help diagnose various conditions.
36 services36 patients
Removal of polyps or growths of large bowel using an endoscope with mechanical snare 45385
This procedure involves using a thin, flexible tube called an endoscope to examine the large bowel. If any abnormal growths or polyps are found, a tool called a mechanical snare is used to remove them. This is a common method to prevent potential health issues.
35 services35 patients

Hospital Affiliations CMS Care Compare

Hospitals where this provider delivers care, identified from recent Medicare claims and place-of-service records.

Evergreenhealth Medical Center

Acute Care Hospitals · Kirkland, WA
5/5 CMS rating
OwnershipGovernment - Hospital District or Authority
CMS Certification Number500124
Location12040 NE 128th StreetKirkland, WA 98034 · King County
Emergency services Birthing friendly

Physician Visit Costs CMS claims · ZIP area

Typical Medicare office-visit costs in the 98034 ZIP code area, from fee-for-service claims. These are area statistics, not this provider’s prices; actual charges vary by service and coverage.

New Patient
$143.76 typical visit price
range $63.67 – $189.37
Typical copayment $35.94 (range $15.91 – $47.34)
Most-billed visit code 99204
Established Patient
$111.00 typical visit price
range $21.12 – $155.00
Typical copayment $27.75 (range $5.28 – $38.75)
Most-billed visit code 99214
Amounts reflect what Medicare beneficiaries in this ZIP area are typically charged for office visits. Patients with other coverage should check their individual plans.

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.

79.97/100
MIPS Final ScoreMerit-based Incentive Payment System · CMS Quality Payment Program
Scored as part of a group practice
Quality69.67
Promoting Interoperability100
Improvement Activities40
Cost63.57

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.

Physical Therapist
11800 NE 128TH ST, SUITE 400
KIRKLAND, WA 98034
Internal Medicine (Gastroenterology)
11800 NE 128TH ST, SUITE 100
KIRKLAND, WA 98034
Family Medicine
11800 NE 128TH ST, STE, 560
KIRKLAND, WA 98034
Internal Medicine (Gastroenterology)
11800 NE 128TH ST, SUITE 100
KIRKLAND, WA 98034
Physical Therapist
11800 NE 128TH ST
KIRKLAND, WA 98034
Nurse's Aide
11800 NE 128TH ST
KIRKLAND, WA 98034
Registered Nurse (Home Health)
11800 NE 128TH ST
KIRKLAND, WA 98034
Registered Nurse
11800 NE 128TH ST
KIRKLAND, WA 98034

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 Mason's NPI number?

The NPI number for Ronald Mason is 1124088430. It was assigned to this individual provider in the NPPES registry on March 23, 2006.

Where is Ronald Mason located?

Ronald Mason practices at 11800 NE 128th St Suite 100, Kirkland, WA 98034. The listed phone number is (425) 899-4500.

What is Ronald Mason's specialty?

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

Is Ronald Mason enrolled in Medicare?

Yes. Ronald Mason 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 Ronald Mason accept?

Health plans from PacificSource Health Plans, Premera Blue Cross Blue Shield of Alaska and Providence Health Plan list Ronald Mason 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 Ronald Mason affiliated with any hospitals?

According to CMS data, Ronald Mason is affiliated with Evergreenhealth Medical Center.

When was this NPI record last updated?

The NPPES record for Ronald Mason was last updated on March 25, 2014. 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.