James Ramsay Halverson, M.D.
Family Medicine Physician · Ojai, CA
James Ramsay Halverson, M.D. is a family medicine physician with a practice address in Ojai, California, and NPI 1720044787, issued on Apr 26, 2006. Check the license (California G51412, as entered in NPPES) on the Medical Board of California; the Medicare figures below come from public CMS files.
- Name
- James Ramsay Halverson
- Credential
- M.D.
- Primary taxonomy
- Family Medicine Physician 207Q00000X
- License number
- G51412 CA
Self-reported in NPPES; status is on the state search - Practice location
- 117 Pirie RD, Ojai, CA 93023
- Phone
- (805) 646-7246
- Enumerated
- Apr 26, 2006
- Record last updated
- Oct 18, 2007 (not updated in 19 years: call before relying on the address or phone)
- Fax
- (805) 646-8936
- Medicaid ID
- YYY49311Y CA
- Medicare enrollment
- Enrolled (PECOS I20080229000474); accepts Medicare assignment
- Medical or professional school
- Duke University School Of Medicine, 1982
- Telehealth
- Offers telehealth (CMS)
- Entity
- Type 1 · individual
8 nearest family medicine physician records → All 17,133 in California → Look up another NPI →
Also registered at 117 Pirie RD
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Linda ConradFamily Nurse Practitioner1982810073
- Mary Dial, M.D.Family Medicine Physician1962468553
- Bonnie Griffin, PAPhysician Assistant1801985114
- Carl Gross, M.D.Family Medicine Physician1497711451
- Mary Nelson, FNP-CFamily Nurse Practitioner1285846220
- Irina Rodriguez, D.D.S.General Practice Dentistry1780711580
Verify James Ramsay Halverson in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMedical Board of California
Search for license G51412Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
2.9 times the Medicare Part D claims of the average family medicine physician in 2024
10,103 Medicare Part D claims for 1,026 beneficiaries, against an average of 3,544 among the 117,163 providers of this specialty who prescribed in Part D. Brand-name drugs were 10% of claims. 505 claims were for opioids.
Most prescribed
- Atorvastatin Calcium869 claims
- Amlodipine Besylate541 claims
- Levothyroxine Sodium491 claims
- Losartan Potassium375 claims
- Hydrocodone-Acetaminophen274 claims
- Tamsulosin Hcl242 claims
Source: CMS Medicare Part D Prescribers by Provider and Drug, 2024 (data.cms.gov). Part D covers prescriptions for Medicare patients only; drugs with fewer than 11 claims are not published.
No measured MIPS final score for 2023
CMS assigned the neutral MIPS final score of 75 without scoring Quality, Cost, Promoting Interoperability or Improvement Activities. It is an administrative threshold, so PlainDoctor does not compare it with measured clinicians.
Source: CMS Quality Payment Program, MIPS performance year 2023, group reporting; category weights for 2023 (qpp.cms.gov).
Industry payments in 2024: $15.97
1 payment: food and beverage; the largest payer was AstraZeneca Pharmaceuticals LP. The 55,478 providers of this specialty with any payment received $902.55 on average. Payments are reported by manufacturers, not by the provider, and are not a sign of wrongdoing.
Source: CMS Open Payments, program year 2024 (openpaymentsdata.cms.gov); average among providers of this specialty with at least one payment.
Bills Medicare through one group practice
- Primary Medical Group OF Ventura County IncVentura, CA
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
James Ramsay Halverson among 17,133 family medicine physician records in California
James Ramsay Halverson, M.D. is one of 17,133 family medicine physician records with a practice address in California. 81% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2006, is newer than 6% of them.
- NPI issued2006 · 6% of these records are older, 59% newer
- In a Medicare fileYes · 81% of these records are
- In the CMS Doctors and Clinicians fileYes · 62% of these records are
- Graduated1982 · median 2005 among the 10,652 with a school on file
- Record last updated2007 · 58% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 207Q00000X and a California practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
13 family medicine physician records list a practice address in Ojai
They are 13 of the 271 NPPES records with a practice address in Ojai, and 17,133 family medicine physician records in California.
All 17,133 in California → Every provider in Ojai → Family Medicine Physician nationwide →
The 8 family medicine physician records with the nearest ZIP codes
- Sterling Adams, DOOjai, CA 930231629539887
- Preston Arndt, M.D.Ojai, CA 930231346303336
- Daniel Demirchyan, MDOjai, CA 930231740639046
- Mary Dial, M.D.Ojai, CA 930231962468553
- Kristyna Fong, D.O.Ojai, CA 930231801294657
- Carl Gross, M.D.Ojai, CA 930231497711451
- Hans Gruenn, M.D.Ojai, CA 930231649398371
- Maria Halvorson, DOOjai, CA 930231164446704
Common questions
What is James Ramsay Halverson, M.D.'s NPI number?
James Ramsay Halverson, M.D.'s National Provider Identifier (NPI) is 1720044787, issued on Apr 26, 2006. An NPI identifies a provider in billing; it is not a license.
Where is James Ramsay Halverson, M.D. located?
The NPPES record lists a practice address at 117 Pirie RD, Ojai, CA, 93023. Phone: (805) 646-7246. Providers update this record themselves, so call before visiting.
How can I verify James Ramsay Halverson, M.D.'s license?
NPPES lists California license number G51412, as entered by the provider. Search the Medical Board of California at https://www.mbc.ca.gov/License-Verification/default.aspx. The NPPES record confirms identity only; the state search shows license status, expiration and public orders.
How much does James Ramsay Halverson, M.D. prescribe under Medicare Part D?
In 2024, James Ramsay Halverson, M.D. had 10,103 Medicare Part D claims for 1,026 beneficiaries; the average among family medicine physician prescribers was 3,544. Part D covers Medicare prescriptions only.
What is James Ramsay Halverson, M.D.'s MIPS final score?
CMS assigned the neutral MIPS final score of 75 for 2023 without scoring any category, so it is not a measured result.
Source: CMS National Plan and Provider Enumeration System (NPPES), file of Aug 9, 2026 (NPPES files on CMS.gov); NUCC Health Care Provider Taxonomy. Medicare files from data.cms.gov. An NPI identifies who bills; it is not a license.
Figures on PlainDoctor are read from the federal files each page names (CMS NPPES, Medicare Part D, MIPS, Open Payments; the HHS-OIG exclusion list only as counts) and from Census population estimates, with the file date shown beside them. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error. Data current as of Aug 9, 2026.