Dr. Julia Olson Farmer, MD
- Part D claims, 2024
- 4,517
- Industry payments
- $711
- Affiliated sites
- 2
- Medical group
- 1
- Insurance carriers
- 4
- Practice address
- 517 North Horne Street, Oceanside, CA 92054
- Practice phone
- Call (760) 631-5009
- Professional email
- Get professional email
- Personal email
- Get personal email
- Mobile number
- Get mobile number
Primary practice
VCC - Horne
FQHC - Main Site · Oceanside, California
Find Dr. Farmer's professional email, personal email and mobile number
Dmand AI checks each channel through healthcare-specific waterfall enrichment. See what is on file with a free account, with practice phones, licenses and affiliations.
Dr. Julia Olson Farmer is an internist in Oceanside, California
Dr. Farmer practices at VCC - Horne in Oceanside, California.
Dr. Farmer's NPI, 1508959347, was assigned on October 2, 2006. Dr. Farmer graduated from UC Davis School of Medicine in 2002. Dr. Farmer's California license number on file is C171929.
- NPI
- 1508959347NPI Registry (opens in a new tab)
- Medicare PAC ID
- 4587739644
- NPI enumeration date
- October 2, 2006
- NPI status
- Active
- Accepts Medicare assignment
- Yes
- Practice phone
- (760) 631-5009
- Professional email
- Get email
- Personal email
- Get email
- Mobile number
- Get number
- Sex
- Female
- Estimated age
- 50
- Medical school graduation
- 2002
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; Dmand AI Affiliation Data; and Doctors and Clinicians National Downloadable File (CMS)
Dr. Julia Olson Farmer practices at VCC - Horne in Oceanside, California
Dr. Farmer's primary practice is VCC - Horne, at 517 North Horne Street, Oceanside, CA 92054 in San Diego County. The practice phone is (760) 631-5009.
- VCC - Horne517 North Horne Street, Oceanside, CA 92054 · San Diego CountyPhone(760) 631-5009
Source: Dmand AI Affiliation Data
Dr. Julia Olson Farmer is affiliated with 2 sites of care and 1 medical group
Dr. Farmer's primary practice is VCC - Horne in Oceanside, California. The medical group on file is Rheumatology and Arthritis Medical Clinic. Dmand AI also links Dr. Farmer to 1 more group practice or clinic, named with a free account. Dr. Farmer's employer is on file too: a community health center (fqhc).
Sources: Dmand AI Affiliation Data; and Dmand AI Org Hierarchy Data
Dmand AI tracks the EHR system at Dr. Julia Olson Farmer's practice
Dmand AI tracks the electronic health record (EHR) system at each site where Dr. Farmer practices, 2 sites in all. Vendor and product names are available with a free account.
| Site | EHR vendor and product |
|---|---|
| VCC - Horne | Available with a free account |
| +1 more affiliated site | Available with a free account |
Source: Dmand AI Technology Install Data
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Dr. Julia Olson Farmer is one of 16,751 internists in California
Internal medicine is Dr. Farmer's primary specialty in the NPI Registry, under taxonomy code 207R00000X. Dr. Farmer is board certified in internal medicine by the American Board of Internal Medicine. Dmand AI has Dr. Farmer's licenses on file in 2 states: California and Colorado.
Specialties and state licenses
- Internal medicine, CaliforniaPrimary
- Colorado license
Clinical focus
Dmand AI lists alzheimer's disease, chronic diabetes, chronic hypertension, coronary artery disease, diabetic emergency, fluid and electrolyte imbalances, hand joint or tendon inflammation and high cholesterol among the conditions Dr. Farmer treats.
Internists near Dr. Farmer
Counts of internists with a Dmand AI profile, by place and practice. Each opens the list.
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; and Dmand AI Peer Benchmarks
Dr. Julia Olson Farmer's patients have a median age of 73
Across all payers, Dmand AI patient panel data puts Dr. Farmer's median patient age at 73, with 62% women.
Dr. Farmer's patients across all payers
Dmand AI patient panel data covers Medicare, Medicaid and commercial patients.
Patient panel by age, all payers
Median age 73
Patient panel by sex, all payers
- Women62%
- Men38%
Source: Dmand AI Patient Panel Data
Dr. Julia Olson Farmer wrote 4,517 Medicare Part D claims in 2024
In 2024, Dr. Farmer wrote 4,517 Medicare Part D claims for 269 patients. 83% of them were for generic drugs. CMS names the drug for 3,978 of them, across 93 drugs with 11 or more claims each, at $430,290 in total drug cost. In 2023, CMS named 3,139 claims across 68 drugs.
Dr. Farmer's Part D claims by kind of drug, 2024
- Generic3,737 claims83%
- Brand-name707 claims16%
- Other73 claims2%
Dr. Farmer's most prescribed drugs by claims, 2024
CMS names a drug when it has 11 or more claims. Share is of the claims for drugs CMS names.
Drug classes CMS tracks in Dr. Farmer's Part D claims, 2024
- Opioids1%45 of 4,517 claims
- Antibiotics3%142 of 4,517 claims
- Antipsychotics, patients 65 and over0%19 of 4,517 claims
Share of all Part D claims for each drug class CMS reports on. Classes with no claims are left out.
Part D claims for drugs CMS names, 2023 to 2024
- 2023
- 2024
- Claims for drugs CMS names
- 2023: 3,1392024: 3,97827%
Drugs named by CMS: 93 in 2024, 68 in 2023.
Sources: Medicare Part D Prescribers - by Provider and Drug (CMS), 2024 data, released May 6, 2026; and Medicare Part D Prescribers - by Provider (CMS), 2024 data
How Dr. Julia Olson Farmer takes part in Medicare
Dr. Farmer accepts Medicare assignment, so Medicare's approved amount is taken as full payment.
- Accepts Medicare assignment
- Yes
Source: Doctors and Clinicians National Downloadable File (CMS)
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Dr. Julia Olson Farmer received $711 in industry payments from 2023 to 2025
CMS Open Payments shows 9 general payments to Dr. Farmer from 5 drug and device companies from 2023 to 2025. Food and beverage make up the largest share, 100% of the total. Eli Lilly and Company paid the most, $163.
General payments to Dr. Farmer by program year, 2023 to 2025
Companies that paid Dr. Farmer the most, 2023 to 2025
Share is of all general payments to this clinician.
Source: Open Payments (CMS), 2025 data, released July 7, 2026
Dr. Julia Olson Farmer graduated from UC Davis School of Medicine
Dr. Farmer graduated from UC Davis School of Medicine in 2002. Dr. Farmer is a member of ACP and ACR.
- Medical school
- Board certified in internal medicine
- Board certified in rheumatology
Source: Dmand AI Professional Profile Data
Dr. Julia Olson Farmer accepts plans from 4 insurance carriers
Dr. Farmer is in network with 4 carriers, including Aetna, Molina and AK State Medicaid. HMO plans come from the most carriers, 3. Check the plan with the practice before a visit.
- Aetna
- Molina
- AK State Medicaid
- Humana
Plan types Dr. Farmer accepts, by number of carriers
- HMO3
- Medicare2
- EPO1
- Medicaid1
- POS1
- PPO1
Source: Dmand AI Insurance Network Data
Sources for Dr. Julia Olson Farmer's profile data
| Data on this page | Source |
|---|---|
| NPI, name, sex, specialty and licenses | NPPES NPI Registry (CMS) (opens in a new tab)Dmand AI Professional Profile Data |
| Practice locations and phone | Dmand AI Affiliation Data |
| Primary practice, affiliations and health system | Dmand AI Affiliation DataDmand AI Org Hierarchy Data |
| Medicare patients and the all-payer patient panel | Dmand AI Patient Panel Data |
| Part D prescribing | Medicare Part D Prescribers - by Provider and Drug (CMS) (opens in a new tab)Medicare Part D Prescribers - by Provider (CMS) (opens in a new tab) |
| MIPS scores, telehealth, assignment and procedure percentiles | Doctors and Clinicians National Downloadable File (CMS) (opens in a new tab) |
| Industry payments | Open Payments (CMS) (opens in a new tab) |
| Training, board certification and memberships | Dmand AI Professional Profile Data |
| Insurance carriers and plan types | Dmand AI Insurance Network Data |
| EHR at each practice site | Dmand AI Technology Install Data |
| Similar physicians | Dmand AI Affiliation Data |
Data last refreshed October 2026Report an inaccuracyRemove my information
FAQ
Frequently asked questions about Dr. Julia Olson Farmer
Spotted something out of date? Email hello@dmand.ai and we will check the record. Contact details live in the free trial.
What is Dr. Julia Olson Farmer's NPI number?
Dr. Julia Olson Farmer's NPI number is 1508959347. It was assigned on October 2, 2006, and it is active in the NPI Registry.
What kind of doctor is Dr. Julia Olson Farmer?
Dr. Julia Olson Farmer is an internist in Oceanside, California. The primary specialty in the NPI Registry is Internal Medicine Physician (taxonomy code 207R00000X).
Where does Dr. Julia Olson Farmer practice?
Dr. Farmer practices at 517 North Horne Street, Oceanside, CA 92054. Dr. Farmer's primary practice is VCC - Horne in Oceanside, California. Dmand AI also links Dr. Farmer to 1 group practice or clinic.
What is Dr. Julia Olson Farmer's office phone number?
The practice phone on file for Dr. Farmer is (760) 631-5009.
What is Dr. Julia Olson Farmer's medical license number?
Dr. Farmer's California license number on file is C171929, one of the licenses on file in 2 states.
Which states has Dr. Julia Olson Farmer been licensed in?
Dmand AI has state licenses on file for Dr. Farmer in California (2021 to 2023) and Colorado (2002 to 2023).
What medical group is Dr. Julia Olson Farmer part of?
Dr. Farmer is linked to Rheumatology and Arthritis Medical Clinic.
Does Dr. Julia Olson Farmer accept Medicare?
Yes. CMS lists Dr. Farmer as accepting Medicare assignment.
Is Dr. Julia Olson Farmer board certified?
Yes. Dr. Farmer is board certified in internal medicine by the American Board of Internal Medicine.
Where did Dr. Julia Olson Farmer go to medical school?
Dr. Farmer graduated from UC Davis School of Medicine in 2002.
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What drugs does Dr. Julia Olson Farmer prescribe most?
In 2024 Medicare Part D data, Dr. Farmer's most prescribed drugs by claims were Atorvastatin Calcium, Amlodipine Besylate and Metformin HCl.
Has Dr. Julia Olson Farmer received payments from drug or device companies?
CMS Open Payments shows $711 in general payments to Dr. Farmer from 5 companies from 2023 to 2025. The largest total came from Eli Lilly and Company.
How long has Dr. Julia Olson Farmer been practicing?
Dr. Farmer graduated from medical school in 2002, 24 years ago.
What insurance does Dr. Julia Olson Farmer accept?
Dr. Farmer is in network with 4 carriers, including Aetna, Molina and AK State Medicaid. HMO plans come from the most carriers, 3. Check the plan with the practice before a visit.
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