Dr. John Kasawa, MD
- Medicare services, 2024
- 37
- Medicare patients, 2024
- 38
- Part D claims, 2024
- 2,961
- Industry payments
- $369
- Affiliated sites
- 1
- Practice address
- 8403 N Fallbrook Ave, West Hills, CA 91304
- Practice phone
- Call (740) 289-3508
- Professional email
- Get professional email
- Personal email
- Get personal email
- Mobile number
- Get mobile number
Primary practice
Quest Diagnostics
West Hills, California
Find Dr. Kasawa'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. John Kasawa is a family medicine physician in West Hills, California
Dr. Kasawa practices at Quest Diagnostics in West Hills, California.
Dr. Kasawa's NPI, 1134230329, was assigned on August 31, 2006. Dr. Kasawa graduated from UC San Diego School of Medicine in 2000. Dr. Kasawa holds California license A79338.
- NPI
- 1134230329NPI Registry (opens in a new tab)
- NPI enumeration date
- August 31, 2006
- NPI status
- Active
- Practice phone
- (740) 289-3508
- Professional email
- Get email
- Personal email
- Get email
- Mobile number
- Get number
- Sex
- Male
- Estimated age
- 52
- Medical school graduation
- 2000
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; and Dmand AI Practice Data
Dr. John Kasawa practices at Quest Diagnostics in West Hills, California
Dr. Kasawa's primary practice is Quest Diagnostics, at 8403 N Fallbrook Ave, West Hills, CA 91304 in Los Angeles County. The practice phone is (740) 289-3508.
- Quest Diagnostics8403 N Fallbrook Ave, West Hills, CA 91304 · Los Angeles CountyPhone(740) 289-3508
Sources: NPPES NPI Registry (CMS); and Dmand AI Practice Data
Dr. John Kasawa is affiliated with 2 sites of care and 2 medical groups
Dr. Kasawa's primary practice is Quest Diagnostics in West Hills, California. The medical group on file is La Maestra Community Health Centers. Dmand AI also links Dr. Kasawa to 1 more group practice or clinic and 1 medical group, 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. John Kasawa's practice
Dmand AI tracks the electronic health record (EHR) system at each site where Dr. Kasawa practices. Vendor and product names are available with a free account.
| Site | EHR vendor and product |
|---|---|
| Quest Diagnostics | Available with a free account |
| +1 more site and 1 medical group | Available with a free account |
Source: Dmand AI Technology Install Data
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Dr. John Kasawa is one of 15,680 family medicine physicians in California
Family medicine is Dr. Kasawa's primary specialty in the NPI Registry, under taxonomy code 207Q00000X. Dr. Kasawa is board certified in family medicine by the American Board of Family Medicine. Dr. Kasawa is licensed in California.
Specialties and state licenses
- Family medicine, CaliforniaPrimary
Clinical focus
Dmand AI lists asthma, atrial fibrillation and flutter, chronic anemia, chronic diabetes, chronic hypertension, fibromyalgia and chronic pain, heart failure and high cholesterol among the conditions Dr. Kasawa treats.
Family medicine physicians near Dr. Kasawa
Counts of family medicine physicians 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. John Kasawa billed Medicare for 37 services in 2024
CMS data shows 37 Medicare services from Dr. Kasawa across 1 procedure code in 2024, for 38 Medicare patients. Medicare paid $320 for them. Every service was in an office.
Dr. Kasawa's Medicare services by type, 2023 to 2024
- 2023
- 2024
- Surgery
- 2023: 562024: 3734%
Dr. Kasawa compared with the California median for family medicine physicians, 2024
- Dr. Kasawa
- California median
- Medicare services
- 37vs 24685% below
- Medicare patients
- 38vs 11868% below
- Part D claims
- 2,647vs 8333.2 times
Medians across 15,349 family medicine physicians in California with Dmand AI profiles that report each measure.
Dr. Kasawa'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.
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Medicare shows one payer. Book a meeting to get commercial claims data for Dr. Kasawa and other family medicine physicians in California.
Sources: Medicare Physician & Other Practitioners - by Provider and Service (CMS), 2024 data; and Dmand AI Peer Benchmarks
Dr. John Kasawa treated 38 Medicare patients in 2024, average age 70
CMS counts 38 Medicare patients who saw Dr. Kasawa in 2024. The largest group is 65 to 74, with 22 patients. 75% of them have high blood pressure, and 74% have high cholesterol. 100% are also on Medicaid. Their average risk score is 0.97, where 1.00 is the Medicare average.
Across all payers, Dmand AI patient panel data puts Dr. Kasawa's median patient age at 42, with 48% women.
Dr. Kasawa's Medicare patients by age, 2024
CMS leaves out age groups with fewer than 11 patients.
Dr. Kasawa's Medicare patients by sex, 2024
- Women2566%
- Men1334%
Chronic conditions among Dr. Kasawa's Medicare patients, 2024
- High blood pressure75%
- High cholesterol74%
- Diabetes39%
- Arthritis34%
Share of Medicare patients with each condition. A patient can have several.
Dr. Kasawa's patients across all payers
Dmand AI patient panel data covers Medicare, Medicaid and commercial patients.
Patient panel by age, all payers
Median age 42
Patient panel by sex, all payers
- Women48%
- Men51%
Sources: Dmand AI Patient Panel Data; and Medicare Physician & Other Practitioners - by Provider (CMS), 2024 data
Dr. John Kasawa wrote 2,961 Medicare Part D claims in 2024
In 2024, Dr. Kasawa wrote 2,961 Medicare Part D claims for 161 patients. 89% of them were for generic drugs. CMS names the drug for 2,647 of them, across 60 drugs with 11 or more claims each, at $112,017 in total drug cost. In 2023, CMS named 2,199 claims across 48 drugs.
Dr. Kasawa's Part D claims by kind of drug, 2024
- Generic2,634 claims89%
- Brand-name315 claims11%
- Other12 claims0%
Dr. Kasawa'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. Kasawa's Part D claims, 2024
- Opioids1%35 of 2,961 claims
- Antibiotics1%16 of 2,961 claims
- Antipsychotics, patients 65 and over1%30 of 2,961 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: 2,1992024: 2,64720%
Drugs named by CMS: 60 in 2024, 48 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
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Dr. John Kasawa received $369 in industry payments from 2020 to 2025
CMS Open Payments shows 6 general payments to Dr. Kasawa from 4 drug and device companies from 2020 to 2025. Food and beverage make up the largest share, 100% of the total. Bayer HealthCare Pharmaceuticals Inc. paid the most, $213.
General payments to Dr. Kasawa by program year, 2020 to 2025
Companies that paid Dr. Kasawa the most, 2020 to 2025
Share is of all general payments to this clinician.
Source: Open Payments (CMS), 2025 data, released July 7, 2026
Dr. John Kasawa graduated from UC San Diego School of Medicine
Dr. Kasawa graduated from UC San Diego School of Medicine in 2000.
- Medical school
- Board certified in family medicine
Source: Dmand AI Professional Profile Data
Dr. John Kasawa accepts plans from 4 insurance carriers
Dr. Kasawa is in network with 4 carriers, including Aetna, Molina and CMS Medicare. HMO plans come from the most carriers, 3. Check the plan with the practice before a visit.
- Aetna
- Molina
- CMS Medicare
- Humana
Plan types Dr. Kasawa accepts, by number of carriers
- HMO3
- Medicare3
- EPO1
- POS1
- PPO1
Source: Dmand AI Insurance Network Data
Sources for Dr. John Kasawa'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) |
| 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. John Kasawa
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. John Kasawa's NPI number?
Dr. John Kasawa's NPI number is 1134230329. It was assigned on August 31, 2006, and it is active in the NPI Registry.
What kind of doctor is Dr. John Kasawa?
Dr. John Kasawa is a family medicine physician in West Hills, California. The primary specialty in the NPI Registry is Family Medicine Physician (taxonomy code 207Q00000X).
Where does Dr. John Kasawa practice?
Dr. Kasawa practices at 8403 N Fallbrook Ave, West Hills, CA 91304. Dr. Kasawa's primary practice is Quest Diagnostics in West Hills, California. Dmand AI also links Dr. Kasawa to 1 group practice or clinic and 1 medical group.
What is Dr. John Kasawa's office phone number?
The practice phone on file for Dr. Kasawa is (740) 289-3508.
What is Dr. John Kasawa's medical license number?
Dr. Kasawa holds California license A79338.
What medical group is Dr. John Kasawa part of?
Dr. Kasawa is linked to La Maestra Community Health Centers. Dmand AI links Dr. Kasawa to 1 more medical group.
Does Dr. John Kasawa accept Medicare?
Yes. CMS data shows Dr. Kasawa billed Medicare for 37 services in 2024.
How many Medicare patients does Dr. John Kasawa see?
CMS counts 38 Medicare patients who saw Dr. Kasawa in 2024, with an average age of 70.
Is Dr. John Kasawa board certified?
Yes. Dr. Kasawa is board certified in family medicine by the American Board of Family Medicine.
What services does Dr. John Kasawa bill to Medicare?
In 2024, Dr. Kasawa's most billed Medicare services were surgery: heart and blood vessels (36415).
Show 5 more questionsShow fewer questions
Where did Dr. John Kasawa go to medical school?
Dr. Kasawa graduated from UC San Diego School of Medicine in 2000.
What drugs does Dr. John Kasawa prescribe most?
In 2024 Medicare Part D data, Dr. Kasawa's most prescribed drugs by claims were Lisinopril, Amlodipine Besylate and Metformin HCl.
Has Dr. John Kasawa received payments from drug or device companies?
CMS Open Payments shows $369 in general payments to Dr. Kasawa from 4 companies from 2020 to 2025. The largest total came from Bayer HealthCare Pharmaceuticals Inc.
How long has Dr. John Kasawa been practicing?
Dr. Kasawa graduated from medical school in 2000, 26 years ago.
What insurance does Dr. John Kasawa accept?
Dr. Kasawa is in network with 4 carriers, including Aetna, Molina and CMS Medicare. HMO plans come from the most carriers, 3. Check the plan with the practice before a visit.
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