Maria Halvorson, DO
NPI 1164446704 · Family Medicine Physician · Ojai, CA
Enrolled with Medicare as Practitioner - Family Practice · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Maria Halvorson, DO is a Family Medicine Physician provider in Ojai, CA (NPI 1164446704).
Provider details
- NPI number
- 1164446704
- Entity type
- Individual
- Primary specialty
- Family Medicine PhysicianAllopathic & Osteopathic Physicians
- Credential
- DO
- Sex
- Female
- Sole proprietor
- No
- License
- 20A7887 (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
19 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
903 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) |
|---|---|---|
| Established Patient Office Or Other Outpatient Visit With Low Level OD Decision Making, If Using Time, 20 Minutes Or More99213 | 240 | $70 |
| Established Patient Office Or Other Outpatient Visit With Moderate Level of Decision Making, If Using Time, 30 Minutes Or More99214 | 187 | $89 |
| Annual Wellness Visit, Includes a Personalized Prevention Plan of Service (pps), Subsequent VisitG0439 | 165 | $57 |
| Osteopathic Manipulative Treatment, 3-4 Body Regions98926 | 78 | $48 |
| Administration of Influenza Virus VaccineG0008 | 59 | $29 |
| Administration and Interpretation of Patient-Focused Health Risk Assessment96160 | 48 |
What this provider prescribes (Medicare Part D)
Top drugs by Medicare Part D claim volume, 2024 · 101 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Atorvastatin Calcium | 352 | 101 |
| Levothyroxine Sodium | 297 | 68 |
| Lisinopril | 194 | 48 |
| Omeprazole | 151 | 31 |
| Metoprolol Succinate | 132 | 35 |
| Amlodipine Besylate | 128 | 36 |
| Hydrocodone/Acetaminophen |
Practice location
Mailing address
Registry dates
- Enumerated
- 2006-07-27
- Last updated
- 2010-07-08
Frequently asked questions
- What is Maria Halvorson's NPI number?
- Maria Halvorson's National Provider Identifier (NPI) is 1164446704, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Maria Halvorson's specialty?
- Maria Halvorson is listed in the NPPES registry with a primary specialty of Family Medicine Physician (Allopathic & Osteopathic Physicians).
- Where is Maria Halvorson located?
- Maria Halvorson's practice location on file with NPPES is 1202 Maricopa Hwy, Ojai, CA 93023-3170.
- What is Maria Halvorson's phone number?
- The practice phone number listed in the NPPES registry for Maria Halvorson is (805) 640-0068.
- Does Maria Halvorson accept Medicare?
- Maria Halvorson is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Maria Halvorson's NPI active?
- Yes — Maria Halvorson's NPI (1164446704) is active in the NPPES registry as of the last update on 2010-07-08.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.