Donald Downs, MD.
NPI 1568451979 · Family Medicine Physician · Simi Valley, CA
Enrolled with Medicare as Practitioner - Family Practice · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Donald Downs, MD. is a Family Medicine Physician provider in Simi Valley, CA (NPI 1568451979).
Provider details
- NPI number
- 1568451979
- Entity type
- Individual
- Primary specialty
- Family Medicine PhysicianAllopathic & Osteopathic Physicians
- Credential
- MD.
- Sex
- Male
- Sole proprietor
- No
- License
- G61850 (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
20 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
512 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) |
|---|---|---|
| Insertion of Needle Into Vein for Collection of Blood Sample36415 | 163 | $9 |
| Established Patient Office Or Other Outpatient Visit With Moderate Level of Decision Making, If Using Time, 30 Minutes Or More99214 | 111 | $137 |
| Established Patient Office Or Other Outpatient Visit With Low Level OD Decision Making, If Using Time, 20 Minutes Or More99213 | 104 | $96 |
| Visit Complexity Inherent to Evaluation and Management Associated With Medical Care Services That Serve As the Continuing Focal Point for All Needed Health Care Services And/Or With Medical Care Services That Are Part of Ongoing Care Related to a Patient'SG2211 | 78 | $17 |
| Administration of Influenza Virus VaccineG0008 | 25 | $35 |
| Annual Wellness Visit, Includes a Personalized Prevention Plan of Service (pps), Subsequent Visit |
What this provider prescribes (Medicare Part D)
Top drugs by Medicare Part D claim volume, 2024 · 80 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Atorvastatin Calcium | 314 | 93 |
| Losartan Potassium | 196 | 55 |
| Lisinopril | 138 | 39 |
| Amlodipine Besylate | 134 | 41 |
| Levothyroxine Sodium | 127 | 33 |
| Omeprazole | 99 | 31 |
| Rosuvastatin Calcium |
Practice location
Mailing address
Registry dates
- Enumerated
- 2005-10-18
- Last updated
- 2014-04-03
Frequently asked questions
- What is Donald Downs's NPI number?
- Donald Downs's National Provider Identifier (NPI) is 1568451979, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Donald Downs's specialty?
- Donald Downs is listed in the NPPES registry with a primary specialty of Family Medicine Physician (Allopathic & Osteopathic Physicians).
- Where is Donald Downs located?
- Donald Downs's practice location on file with NPPES is 2655 1st St, Simi Valley, CA 93065-1547.
- What is Donald Downs's phone number?
- The practice phone number listed in the NPPES registry for Donald Downs is (805) 206-2000.
- Does Donald Downs accept Medicare?
- Donald Downs is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Donald Downs's NPI active?
- Yes — Donald Downs's NPI (1568451979) is active in the NPPES registry as of the last update on 2014-04-03.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.