Doctor profile · Federal record
Dr. Zachary Mattes, M.D.
Hospitalist Physician (CMS: Hospitalist) · Internal Medicine Physician · Seattle, WA
- NPI 1841644432
- Accepts Medicare
- 10 yrs in practice
- Male
- Group practice
- No sanctions
Practice & contact
Operates at 2 locations .
- Primary practice
-
1101 Madison St Ste 301
Seattle, WA 981043599
(206) 505-1300 - Additional location
-
Virginia Mason Medical Center 925 Seneca St
Seattle, WA 98101
(206) 515-5811 - Mailing address
-
925 Seneca St
Seattle, WA 981012742
Credentials & registration
- NPI registered
- April 2016 — 10 yrs on file
- Profile last updated
- June 17, 2021
- Year of graduation
- 2016 — 10 yrs since
- Specialty taxonomy
- 208M00000X — NUCC code
- State license (1)
- Washington #MD60974864
Federal sanctions & exclusions
No sanctions, exclusions or revocations on file
Checked against OIG LEIE on NPI 1841644432. Last verified May 11, 2026.Medicare procedures · 2023
Top services delivered
Total services
728
Distinct HCPCS
5
Medicare allowed
$72,560
| HCPCS | Description | Services | Patients | Avg allowed | |
|---|---|---|---|---|---|
99232 |
Subsequent hospital care with moderate levelof medical decision making, if using time, at least 35 minutes | 354 | 171 | $83 | |
99233 |
Subsequent hospital care with moderate levelof medical decision making, if using time, at least 50 minutes | 183 | 127 | $126 | |
99239 |
Hospital discharge day management, more than 30 minutes | 110 | 108 | $121 | |
99231 |
Subsequent hospital care with straightforward or low level of medical decision making, per day, if using time, at least 25 minutes | 61 | 33 | $52 | |
99223 |
Initial hospital care with moderate level of medical decision making, if using time, at least 75 minutes | 20 | 20 | $183 |
In context: peer comparison
Among 108 peers in Seattle Hospitalist Physician, average services per provider: 77. This provider delivers 9.5× the peer median.Medicare Part D · 2023
Top prescriptions
Total claims
11
Patients
0
Total drug cost
$70
| Drug | Type | Claims | Patients | Total cost |
|---|---|---|---|---|
| Levofloxacin | Generic | 11 | 0 | $70 |
Hospital affiliations
Frequently asked questions
What is Dr. Zachary Mattes's medical specialty?
Dr. Zachary Mattes practices Hospitalist Physician in Seattle, WA.
Where does Dr. Zachary Mattes practice?
Dr. Zachary Mattes practices at 1101 Madison St Ste 301, Seattle, WA 981043599. Office phone: 2065051300.
What is Dr. Zachary Mattes's NPI?
Dr. Zachary Mattes's National Provider Identifier (NPI) is 1841644432, issued by NPPES.
Does Dr. Zachary Mattes accept Medicare assignment?
Yes. Dr. Zachary Mattes accepts Medicare assignment, meaning Medicare-allowed amounts are accepted as full payment for covered services.
What procedures does Dr. Zachary Mattes commonly perform?
Top Medicare-reported procedures in 2023: Subsequent hospital care with moderate levelof medical decision making (HCPCS 99232); Subsequent hospital care with moderate levelof medical decision making (HCPCS 99233); Hospital discharge day management (HCPCS 99239). Source: CMS Medicare Physician & Other Practitioners file.