Dr. David Louis Westra, MD
- Medicare services, 2024
- 639
- Medicare patients, 2024
- 294
- Part D claims, 2024
- 284
- Publications
- 1
- MIPS score, 2024
- 24
- Practice address
- 168 N Brent St, Ventura, CA 93003
- Practice phone
- Call (805) 643-5438
- Professional email
- Get professional email
- Personal email
- Get personal email
- Mobile number
- Get mobile number
Primary practice
Plaza Surgical Center, Inc.
Ventura, California
Find Dr. Westra'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. David Louis Westra is a neurosurgeon in Ventura, California
Dr. Westra practices at Plaza Surgical Center, Inc. in Ventura, California.
Dr. Westra's NPI, 1265645790, was assigned on May 8, 2007. Dr. Westra graduated from McGovern Medical School in 2004. Dr. Westra holds California license A93870.
- NPI
- 1265645790NPI Registry (opens in a new tab)
- Medicare PAC ID
- 1153513510
- NPI enumeration date
- May 8, 2007
- NPI status
- Active
- Accepts Medicare assignment
- Yes
- Practice phone
- (805) 643-5438
- Professional email
- Get email
- Personal email
- Get email
- Mobile number
- Get number
- Sex
- Male
- Estimated age
- 48
- Medical school graduation
- 2004
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; Dmand AI Practice Data; and Doctors and Clinicians National Downloadable File (CMS)
Dr. David Louis Westra practices at Plaza Surgical Center, Inc. in Ventura, California
Dr. Westra's primary practice is Plaza Surgical Center, Inc., at 168 N Brent St, Ventura, CA 93003 in Ventura County. The practice phone is (805) 643-5438.
- Plaza Surgical Center, Inc.168 N Brent St, Ventura, CA 93003 · Ventura CountyPhone(805) 643-5438
Sources: NPPES NPI Registry (CMS); and Dmand AI Practice Data
Dr. David Louis Westra is affiliated with 9 sites of care and 4 medical groups
Dr. Westra's primary practice is Plaza Surgical Center, Inc. in Ventura, California. Dr. Westra is also affiliated with Community Memorial Hospital - Ventura. The medical group on file is Ventura County Medical Center. Dmand AI also links Dr. Westra to 1 more hospital, 4 group practices and clinics, 3 medical groups and 2 home health agencies, each named with a free account.
Sources: NPPES NPI Registry (CMS); Dmand AI Practice Data; and Dmand AI Affiliation Data
Dmand AI tracks the EHR system at Dr. David Louis Westra's practice
Dmand AI tracks the electronic health record (EHR) system at each site where Dr. Westra practices, 8 sites in all. Vendor and product names are available with a free account.
| Site | EHR vendor and product |
|---|---|
| Plaza Surgical Center, Inc. | Available with a free account |
| +8 more sites and 3 medical groups | Available with a free account |
Source: Dmand AI Technology Install Data
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Dr. David Louis Westra is one of 846 neurosurgeons in California
Neurological surgery is Dr. Westra's primary specialty in the NPI Registry, under taxonomy code 207T00000X. Dr. Westra is board certified in neurological surgery by the American Board of Neurological Surgery. Dr. Westra is licensed in California.
Specialties and state licenses
- Neurological surgery, CaliforniaPrimary
Clinical focus
Dmand AI lists back and neck pain treatment without fusion, lower back pain, neck pain and spine problems, spinal fusion and thoracic spine disorders among the conditions Dr. Westra treats.
Neurosurgeons near Dr. Westra
Counts of neurosurgeons 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. David Louis Westra billed Medicare for 639 services in 2024
CMS data shows 639 Medicare services from Dr. Westra across 9 procedure codes in 2024, for 294 Medicare patients. Medicare paid $106,620 for them.
Dr. Westra's Medicare services by type, 2023 to 2024
- 2023
- 2024
- Office and hospital visits
- 2023: 5692024: 5179%
- Surgery
- 2023: 522024: 122135%
Where Dr. Westra's Medicare services took place, 2024
- In an office50178%
- In a facility13822%
Dr. Westra compared with the California median for neurosurgeons, 2024
- Dr. Westra
- California median
- Medicare services
- 639vs 2163.0 times
- Medicare patients
- 294vs 15491% above
- Part D claims
- 239vs 269.2 times
Medians across 679 neurosurgeons in California with Dmand AI profiles that report each measure.
Dr. Westra's most billed Medicare procedure codes, 2024
CMS publishes codes billed for 11 or more Medicare patients. Each label is the code family; CPT descriptions are licensed by the AMA.
Need commercial claims for Dr. Westra?
Medicare shows one payer. Book a meeting to get commercial claims data for Dr. Westra and other neurosurgeons in California.
Sources: Medicare Physician & Other Practitioners - by Provider and Service (CMS), 2024 data; and Dmand AI Peer Benchmarks
Dr. David Louis Westra treated 294 Medicare patients in 2024, average age 75
CMS counts 294 Medicare patients who saw Dr. Westra in 2024. The largest group is 65 to 74, with 130 patients. 75% of them have arthritis, and 75% have high cholesterol. 5% are also on Medicaid. Their average risk score is 1.25, where 1.00 is the Medicare average.
Across all payers, Dmand AI patient panel data puts Dr. Westra's median patient age at 71, with 52% women.
Dr. Westra's Medicare patients by age, 2024
Dr. Westra's Medicare patients by sex, 2024
- Women15753%
- Men13747%
Chronic conditions among Dr. Westra's Medicare patients, 2024
- Arthritis75%
- High cholesterol75%
- High blood pressure74%
- Anxiety30%
- Ischemic heart disease29%
- Mood disorders27%
- Depression24%
- Diabetes24%
Share of Medicare patients with each condition. A patient can have several.
Dr. Westra's patients across all payers
Dmand AI patient panel data covers Medicare, Medicaid and commercial patients.
Patient panel by age, all payers
Median age 71
Patient panel by sex, all payers
- Women52%
- Men48%
Sources: Dmand AI Patient Panel Data; and Medicare Physician & Other Practitioners - by Provider (CMS), 2024 data
Dr. David Louis Westra wrote 284 Medicare Part D claims in 2024
In 2024, Dr. Westra wrote 284 Medicare Part D claims for 124 patients. 98% of them were for generic drugs. CMS names the drug for 239 of them, across 5 drugs with 11 or more claims each, at $2,051 in total drug cost. In 2023, CMS named 196 claims across 4 drugs.
Dr. Westra's Part D claims by kind of drug, 2024
- Generic279 claims98%
- Brand-name and other5 claims2%
Dr. Westra'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. Westra's Part D claims, 2024
- Opioids70%198 of 284 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: 1962024: 23922%
Drugs named by CMS: 5 in 2024, 4 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
Dr. David Louis Westra scored 24 out of 100 in Medicare's MIPS program for 2024
CMS publishes a Merit-based Incentive Payment System (MIPS) score of 24 out of 100 for Dr. Westra for performance year 2024, reported individually. Dr. Westra accepts Medicare assignment, so Medicare's approved amount is taken as full payment. CMS counts 84 procedures of laminectomy or laminotomy (partial removal of spine bones) by Dr. Westra, more than 91% of the clinicians it reports for that procedure.
- Accepts Medicare assignment
- Yes
Dr. Westra's MIPS scores, performance year 2024
- 24of 100Final score
- 0of 100Quality
- 0of 100Improvement Activities
- 78of 100Cost
Each score is out of 100. The final score weighs the categories CMS scored for this clinician.
Where Dr. Westra ranks in Medicare procedure volume
- Spinal fusion
- 73rd percentile98 procedures
- Laminectomy or laminotomy (partial removal of spine bones)
- 91st percentile84 procedures
CMS ranks each clinician against every clinician it reports for the same procedure category.
Sources: Doctors and Clinicians National Downloadable File (CMS); Clinician Public Reporting: Overall MIPS Performance (CMS), 2024 data, released September 10, 2026; and Doctors and Clinicians Utilization Data (CMS)
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Dr. David Louis Westra has 1 publication on record
Dmand AI links 1 paper to Dr. Westra.
Recent publications by Dr. Westra
See who Dr. Westra researches with
Physician Network Discovery turns co-authorship, shared hospitals and shared groups into a map of who Dr. Westra works with, so you can find a warm path to the right neurosurgeons.
Sources: PubMed (National Library of Medicine); and Dmand AI Research Linkage
Dr. David Louis Westra received $5,702 in industry payments from 2016 to 2025
CMS Open Payments shows 206 general payments to Dr. Westra from 19 drug and device companies from 2016 to 2025. Food and beverage make up the largest share, 89% of the total. Globus Medical, Inc. paid the most, $2,589.
General payments to Dr. Westra by program year, 2016 to 2025
General payments to Dr. Westra by kind, 2016 to 2025
- Food and beverage$5,09889%
- Travel and lodging$60411%
Companies that paid Dr. Westra the most, 2016 to 2025
Share is of all general payments to this clinician.
Source: Open Payments (CMS), 2025 data, released July 7, 2026
Dr. David Louis Westra graduated from McGovern Medical School
Dr. Westra graduated from McGovern Medical School in 2004. Dr. Westra is a member of AANS and CNS.
- Medical school
- Board certified in neurological surgery
Source: Dmand AI Professional Profile Data
Dr. David Louis Westra accepts plans from 16 insurance carriers
Dr. Westra is in network with 16 carriers, including Aetna, United Healthcare and Elevance. PPO plans come from the most carriers, 9. Check the plan with the practice before a visit.
- Aetna
- United Healthcare
- Elevance
- HCSC
- Kaiser Permanente
- Blue Cross Blue Shield of Massachusetts
- Blue Cross Blue Shield of Michigan
- Regence Health Plans
- +8 more carriersWith a free account
Plan types Dr. Westra accepts, by number of carriers
- PPO9
- HMO8
- EPO5
- Medicare5
- POS4
Source: Dmand AI Insurance Network Data
Sources for Dr. David Louis Westra'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 | NPPES NPI Registry (CMS) (opens in a new tab)Dmand AI Practice Data |
| Primary practice, affiliations and health system | NPPES NPI Registry (CMS) (opens in a new tab)Dmand AI Practice DataDmand AI Affiliation Data |
| Medicare services and procedure codes | Medicare Physician & Other Practitioners - by Provider and Service (CMS) (opens in a new tab) |
| State medians for the same specialty | Dmand AI Peer Benchmarks |
| Medicare patients and the all-payer patient panel | Dmand AI Patient Panel DataMedicare Physician & Other Practitioners - by Provider (CMS) (opens in a new tab) |
| 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)Clinician Public Reporting: Overall MIPS Performance (CMS) (opens in a new tab)Doctors and Clinicians Utilization Data (CMS) (opens in a new tab) |
| Publications, topics and co-authors | PubMed (National Library of Medicine) (opens in a new tab)Dmand AI Research Linkage |
| 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. David Louis Westra
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. David Louis Westra's NPI number?
Dr. David Louis Westra's NPI number is 1265645790. It was assigned on May 8, 2007, and it is active in the NPI Registry.
What kind of doctor is Dr. David Louis Westra?
Dr. David Louis Westra is a neurosurgeon in Ventura, California. The primary specialty in the NPI Registry is Neurological Surgery Physician (taxonomy code 207T00000X).
Where does Dr. David Louis Westra practice?
Dr. Westra practices at 168 N Brent St, Ventura, CA 93003. Dr. Westra's primary practice is Plaza Surgical Center, Inc. in Ventura, California. Dmand AI also links Dr. Westra to 1 hospital, 4 group practices and clinics, 3 medical groups and 2 home health agencies.
What is Dr. David Louis Westra's office phone number?
The practice phone on file for Dr. Westra is (805) 643-5438.
What is Dr. David Louis Westra's medical license number?
Dr. Westra holds California license A93870.
Which hospitals is Dr. David Louis Westra affiliated with?
Dr. Westra is affiliated with Community Memorial Hospital - Ventura. Dmand AI links Dr. Westra to 1 more hospital.
What medical group is Dr. David Louis Westra part of?
Dr. Westra is linked to Ventura County Medical Center. Dmand AI links Dr. Westra to 3 more medical groups.
Does Dr. David Louis Westra accept Medicare?
Yes. CMS data shows Dr. Westra billed Medicare for 639 services in 2024, and Dr. Westra accepts Medicare assignment.
What is Dr. David Louis Westra's MIPS score?
Dr. Westra's MIPS final score for performance year 2024 is 24 out of 100, reported individually.
How many Medicare patients does Dr. David Louis Westra see?
CMS counts 294 Medicare patients who saw Dr. Westra in 2024, with an average age of 75.
Show 8 more questionsShow fewer questions
Is Dr. David Louis Westra board certified?
Yes. Dr. Westra is board certified in neurological surgery by the American Board of Neurological Surgery.
What services does Dr. David Louis Westra bill to Medicare?
In 2024, Dr. Westra's most billed Medicare services were office visit, established patient (99213), office visit, new patient (99204) and surgery: brain, spine and nerves (63048).
Where did Dr. David Louis Westra go to medical school?
Dr. Westra graduated from McGovern Medical School in 2004.
What drugs does Dr. David Louis Westra prescribe most?
In 2024 Medicare Part D data, Dr. Westra's most prescribed drugs by claims were Hydrocodone-Acetaminophen, Oxycodone-Acetaminophen and Methylprednisolone.
Has Dr. David Louis Westra received payments from drug or device companies?
CMS Open Payments shows $5,702 in general payments to Dr. Westra from 19 companies from 2016 to 2025. The largest total came from Globus Medical, Inc.
How long has Dr. David Louis Westra been practicing?
Dr. Westra graduated from medical school in 2004, 22 years ago.
Does Dr. David Louis Westra do research?
Dmand AI links 1 publication to Dr. Westra.
What insurance does Dr. David Louis Westra accept?
Dr. Westra is in network with 16 carriers, including Aetna, United Healthcare and Elevance. PPO plans come from the most carriers, 9. Check the plan with the practice before a visit.
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