Doctor profile · Federal record
Dr. Ronald Mason, MD
Gastroenterology Physician (CMS: Gastroenterology) · Kirkland, WA
- NPI 1124088430
- Accepts Medicare
- MIPS 80.0 / 100 · 2023
- 40 yrs in practice
- Male
- Group practice
- No sanctions
Practice & contact
- Primary practice
-
11800 Ne 128Th St, Suite 100
Kirkland, WA 980347201
(425) 899-4500
fax (425) 899-4510 - Mailing address
-
Po Box 34888
Seattle, WA 981241888
Credentials & registration
- NPI registered
- March 2006 — 20 yrs on file
- Profile last updated
- March 25, 2014
- Year of graduation
- 1986 — 40 yrs since
- Specialty taxonomy
- 207RG0100X — NUCC code
- State license (1)
- Washington #MD00042393
- Medicaid
- WA #1003010
Federal sanctions & exclusions
No sanctions, exclusions or revocations on file
Checked against OIG LEIE on NPI 1124088430. Last verified May 11, 2026.Medicare procedures · 2023
Top services delivered
Total services
422
Distinct HCPCS
10
Medicare allowed
$61,332
| HCPCS | Description | Services | Patients | Avg allowed | |
|---|---|---|---|---|---|
45380 |
Biopsy of large bowel using a flexible endoscope | 91 | 91 | $154 | |
99214 |
Established patient office or other outpatient visit, 30-39 minutes | 59 | 53 | $141 | |
99213 |
Established patient office or other outpatient visit, 20-29 minutes | 53 | 45 | $100 | |
43239 |
Biopsy of esophagus, stomach, and/or upper small bowel using a flexible endoscope | 48 | 47 | $112 | |
99204 |
New patient office or other outpatient visit, 45-59 minutes | 43 | 43 | $182 | |
99232 |
Subsequent hospital care with moderate levelof medical decision making, if using time, at least 35 minutes | 34 | 24 | $84 | |
45385 |
Removal of polyps or growths of large bowel using an endoscope with mechanical snare | 33 | 33 | $268 | |
99222 |
Initial hospital care with straightforward or low-level medical decision making, if using time, at least 55 minutes | 19 | 19 | $138 | |
99203 |
New patient office or other outpatient visit, 30-44 minutes | 15 | 15 | $124 | |
G0105 |
Colorectal cancer screening; colonoscopy on individual at high risk | 14 | 14 | $188 |
In context: peer comparison
Among 2 peers in this city , average services per provider: 53. This provider delivers 8.0× the peer median.Open Payments
Industry payments received
All-time total
$773
Transactions
31
Manufacturers
11
| Payer (manufacturer) | Industry | Txns | Amount |
|---|---|---|---|
| ABBVIE INC. | 5 | $145.73 | |
| PFIZER INC. | 7 | $131.45 | |
| Regeneron Healthcare Solutions, Inc. | 4 | $121.65 | |
| Salix Pharmaceuticals, a division of Bausch Health US, LLC | 3 | $70.37 | |
| Celltrion USA Inc. | 2 | $58.50 | |
| AIMMUNE THERAPEUTICS, INC. | 2 | $56.09 | |
| Celgene Corporation | 2 | $48.96 | |
| Lilly USA, LLC | 2 | $48.22 | |
| GENZYME CORPORATION | 2 | $47.33 | |
| Organon Llc | 1 | $25.89 | |
| Takeda Pharmaceuticals U.S.A., Inc. | 1 | $18.75 |
By nature of payment
Medicare Part D · 2023
Top prescriptions
Total claims
784
Patients
217
Total drug cost
$38,963
| Drug | Type | Claims | Patients | Total cost |
|---|---|---|---|---|
| Pantoprazole Sodium | Generic | 376 | 97 | $5,815 |
| Omeprazole | Generic | 134 | 30 | $1,762 |
| Sod Sulf-Potass Sulf-Mag Sulf (Sodium, Potassium,mag Sulfates) | Brand | 62 | 61 | $4,785 |
| Famotidine | Generic | 48 | 15 | $694 |
| Mesalamine | Generic | 27 | 0 | $16,404 |
| Colesevelam Hcl | Generic | 22 | 0 | $2,984 |
| Amitriptyline Hcl | Generic | 21 | 0 | $175 |
| Dexlansoprazole Dr (Dexlansoprazole) | Brand | 17 | 0 | $4,025 |
| Ursodiol | Generic | 17 | 0 | $1,444 |
| Furosemide | Generic | 16 | 0 | $53 |
Hospital affiliations
Frequently asked questions
What is Dr. Ronald Mason's medical specialty?
Dr. Ronald Mason practices Gastroenterology Physician in Kirkland, WA.
Where does Dr. Ronald Mason practice?
Dr. Ronald Mason practices at 11800 Ne 128Th St, Kirkland, WA 980347201. Office phone: 4258994500.
What is Dr. Ronald Mason's NPI?
Dr. Ronald Mason's National Provider Identifier (NPI) is 1124088430, issued by NPPES.
Does Dr. Ronald Mason accept Medicare assignment?
Yes. Dr. Ronald Mason accepts Medicare assignment, meaning Medicare-allowed amounts are accepted as full payment for covered services.
What procedures does Dr. Ronald Mason commonly perform?
Top Medicare-reported procedures in 2023: Biopsy of large bowel using a flexible endoscope (HCPCS 45380); Established patient office or other outpatient visit (HCPCS 99214); Established patient office or other outpatient visit (HCPCS 99213). Source: CMS Medicare Physician & Other Practitioners file.