Gregory Simon, MD
NPI 1609928464 · Psychiatry Physician · Seattle, WA
Enrolled with Medicare as Practitioner - Psychiatry · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Gregory Simon, MD is a Psychiatry Physician provider in Seattle, WA (NPI 1609928464).
Provider details
- NPI number
- 1609928464
- Entity type
- Individual
- Primary specialty
- Psychiatry PhysicianAllopathic & Osteopathic Physicians
- Credential
- MD
- Sex
- Male
- Sole proprietor
- No
- License
- MD00020959 (WA)
Specialties & taxonomies
Allopathic & Osteopathic Physicians
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure38% of score
19 yrs in NPPES registry
- Profile completeness38% of score
100% of core fields populated
- Practice footprint23% of score
1 documented practice location
Signals a provider has no public data for (e.g. Medicare claims) are left out of the score entirely — never counted as zero — so providers without that data are not penalized. See the full formula and weights in our methodology.
What this provider prescribes (Medicare Part D)
Top drugs by Medicare Part D claim volume, 2024 · 37 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Clonazepam | 120 | 16 |
| Trazodone Hcl | 87 | 19 |
| Buspirone Hcl | 79 | 14 |
| Lamotrigine | 75 | 14 |
| Bupropion Hclbrand: Bupropion Xl | 67 | 11 |
| Mirtazapine | 60 | — |
| Dextroamphetamine/Amphetaminebrand: Dextroamphetamine-Amphetamine |
Practice location
Mailing address
Registry dates
- Enumerated
- 2007-01-18
- Last updated
- 2021-05-06
- Certified
- 2021-05-06
Frequently asked questions
- What is Gregory Simon's NPI number?
- Gregory Simon's National Provider Identifier (NPI) is 1609928464, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Gregory Simon's specialty?
- Gregory Simon is listed in the NPPES registry with a primary specialty of Psychiatry Physician (Allopathic & Osteopathic Physicians).
- Where is Gregory Simon located?
- Gregory Simon's practice location on file with NPPES is 310 15th Ave E, Seattle, WA 98112-5103.
- What is Gregory Simon's phone number?
- The practice phone number listed in the NPPES registry for Gregory Simon is (206) 326-2200.
- Does Gregory Simon accept Medicare?
- Gregory Simon is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Gregory Simon's NPI active?
- Yes — Gregory Simon's NPI (1609928464) is active in the NPPES registry as of the last update on 2021-05-06.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.