Alyssa Warren, MD
NPI 1811422231 · Psychiatry Physician · Hermiston, OR
Enrolled with Medicare as Practitioner - Psychiatry · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Alyssa Warren, MD is a Psychiatry Physician provider in Hermiston, OR (NPI 1811422231).
Provider details
- NPI number
- 1811422231
- Entity type
- Individual
- Primary specialty
- Psychiatry PhysicianAllopathic & Osteopathic Physicians
- Credential
- MD
- Sex
- Female
- Sole proprietor
- No
- License
- 042-0015794 (VT)
Specialties & taxonomies
Allopathic & Osteopathic Physicians
Allopathic & Osteopathic Physicians
Allopathic & Osteopathic Physicians
Student, Health Care
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure28% of score
9 yrs in NPPES registry
- Profile completeness28% of score
100% of core fields populated
- Practice footprint17% of score
2 documented practice locations
- Medicare service volume (vs. specialty peers)28% of score
125 Medicare services, 2024 (ranked within specialty)
Medicare volume is ranked against active providers in the same specialty. 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 does (Medicare)
Based on Medicare fee-for-service claims, 2024; not all care is captured.
| Service (HCPCS) | Medicare services | Typical Medicare-allowed (2024) |
|---|---|---|
| Subsequent Hospital Care With Moderate Levelof Medical Decision Making, If Using Time, at Least 50 Minutes99233 | 111 | $112 |
| Hospital Discharge Day Management, More Than 30 Minutes99239 | 14 | $109 |
Typical Medicare-allowed amounts for these services range $109–$112 (2024). The Medicare-allowed amount is what Medicare recognizes for a service under fee-for-service — a reference figure for 2024, not a price quote and not what you would be billed. Medicare Part B covers roughly an eighth of all NPIs (65+ skew); services with fewer than 11 beneficiaries are suppressed by CMS. Source: CMS Medicare Physician & Other Practitioners, by Provider & Service.
Practice location
Mailing address
Additional practice locations (1)
- 32120 Temecula Pkwy # 1093Temecula, CA 92592-6801Phone: (804) 601-4269Fax: (228) 335-4530
Registry dates
- Enumerated
- 2017-04-23
- Last updated
- 2025-07-01
- Certified
- 2025-07-01
Frequently asked questions
- What is Alyssa Warren's NPI number?
- Alyssa Warren's National Provider Identifier (NPI) is 1811422231, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Alyssa Warren's specialty?
- Alyssa Warren is listed in the NPPES registry with a primary specialty of Psychiatry Physician (Allopathic & Osteopathic Physicians).
- Where is Alyssa Warren located?
- Alyssa Warren's practice location on file with NPPES is 600 Nw 11th St, Hermiston, OR 97838-8605.
- What is Alyssa Warren's phone number?
- The practice phone number listed in the NPPES registry for Alyssa Warren is (541) 567-5305.
- Does Alyssa Warren accept Medicare?
- Alyssa Warren is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Alyssa Warren's NPI active?
- Yes — Alyssa Warren's NPI (1811422231) is active in the NPPES registry as of the last update on 2025-07-01.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.