Alejandro Casillas, M.D.
NPI 1376707919 · Emergency Medicine Physician · Ukiah, CA
Enrolled with Medicare as Practitioner - Emergency Medicine · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Alejandro Casillas, M.D. is a Emergency Medicine Physician provider in Ukiah, CA (NPI 1376707919).
Provider details
- NPI number
- 1376707919
- Entity type
- Individual
- Primary specialty
- Emergency Medicine PhysicianAllopathic & Osteopathic Physicians
- Credential
- M.D.
- Sex
- Male
- Sole proprietor
- Yes
- License
- A114918 (CA)
Specialties & taxonomies
Allopathic & Osteopathic Physicians
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure28% of score
17 yrs in NPPES registry
- Profile completeness28% of score
100% of core fields populated
- Practice footprint17% of score
1 documented practice location
- Medicare service volume (vs. specialty peers)28% of score
13 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) |
|---|---|---|
| Emergency Department Visit With Low Level of Medical Decision Making99283 | 13 | $71 |
Typical Medicare-allowed amounts for these services range $71–$71 (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.
What this provider prescribes (Medicare Part D)
Top drugs by Medicare Part D claim volume, 2024 · 9 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Ondansetronbrand: Ondansetron Odt | 32 | 32 |
| Hydrocodone/Acetaminophenbrand: Hydrocodone-Acetaminophen | 30 | 30 |
| Prednisone | 28 | 28 |
| Doxycycline Monohydrate | 18 | 18 |
| Tizanidine Hcl | 17 | 17 |
| Amoxicillin/Potassium Clavbrand: Amoxicillin-Clavulanate Potass | 15 | 15 |
| Cefpodoxime Proxetil |
Practice location
Mailing address
Registry dates
- Enumerated
- 2008-07-14
- Last updated
- 2022-02-11
Frequently asked questions
- What is Alejandro Casillas's NPI number?
- Alejandro Casillas's National Provider Identifier (NPI) is 1376707919, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Alejandro Casillas's specialty?
- Alejandro Casillas is listed in the NPPES registry with a primary specialty of Emergency Medicine Physician (Allopathic & Osteopathic Physicians).
- Where is Alejandro Casillas located?
- Alejandro Casillas's practice location on file with NPPES is 275 Hospital Dr, Ukiah, CA 95482-4531.
- What is Alejandro Casillas's phone number?
- The practice phone number listed in the NPPES registry for Alejandro Casillas is (707) 462-7900.
- Does Alejandro Casillas accept Medicare?
- Alejandro Casillas is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Alejandro Casillas's NPI active?
- Yes — Alejandro Casillas's NPI (1376707919) is active in the NPPES registry as of the last update on 2022-02-11.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.