Dr. Joseph K. Cha, MD
- Medicare patients, 2024
- 21
- Part D claims, 2024
- 1,570
- Hospital affiliations
- 1
- Industry payments
- $151
- Medical groups
- 2
- Practice address
- 5601 De Soto Avenue, Woodland Hills, CA 91367
- Practice phone
- Call (818) 719-3800
- Professional email
- Get professional email
- Personal email
- Get personal email
- Mobile number
- Get mobile number
Find Dr. Cha'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. Joseph K. Cha is a nephrologist in Woodland Hills, California
Dr. Cha practices at Kaiser Permanente Woodland Hills Medical Center in Woodland Hills, California, part of Kaiser Permanente.
Dr. Cha's NPI, 1902003668, was assigned on June 27, 2007. Dr. Cha graduated from Loma Linda University School Of Medicine in 2007. Dr. Cha's California license number on file is A108677.
- NPI
- 1902003668NPI Registry (opens in a new tab)
- Medicare PAC ID
- 0941334007
- NPI enumeration date
- June 27, 2007
- NPI status
- Active
- Accepts Medicare assignment
- Yes
- Practice phone
- (818) 719-3800
- Professional email
- Get email
- Personal email
- Get email
- Mobile number
- Get number
- Sex
- Male
- Estimated age
- 45
- Medical school graduation
- 2007
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; Dmand AI Affiliation Data; and Doctors and Clinicians National Downloadable File (CMS)
Dr. Joseph K. Cha practices at Kaiser Permanente Woodland Hills Medical Center in Woodland Hills, California
Dr. Cha's primary practice is Kaiser Permanente Woodland Hills Medical Center, at 5601 De Soto Avenue, Woodland Hills, CA 91367 in Los Angeles County. The practice phone is (818) 719-3800.
- Kaiser Permanente Woodland Hills Medical Center5601 De Soto Avenue, Woodland Hills, CA 91367 · Los Angeles CountyPhone(818) 719-3800
Source: Dmand AI Affiliation Data
Dr. Joseph K. Cha is affiliated with 2 sites of care and 2 medical groups
Dr. Cha's primary practice is Kaiser Permanente Woodland Hills Medical Center in Woodland Hills, California, part of Kaiser Permanente. The medical group on file is Southern California Permanente Medical Group. Dmand AI also links Dr. Cha to 1 more dialysis center and 1 medical group, each named with a free account.
Sources: Dmand AI Affiliation Data; and Dmand AI Org Hierarchy Data
Dmand AI tracks the EHR system at Dr. Joseph K. Cha's practice
Dmand AI tracks the electronic health record (EHR) system at each site where Dr. Cha practices, 2 sites in all. Vendor and product names are available with a free account.
| Site | EHR vendor and product |
|---|---|
| Kaiser Permanente Woodland Hills Medical Center | 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. Joseph K. Cha is one of 1,401 nephrologists in California
Nephrology is Dr. Cha's primary specialty in the NPI Registry, under taxonomy code 207RN0300X. Dr. Cha is board certified in internal medicine by the American Board of Internal Medicine. Dr. Cha has a license on file in California.
Specialties and state licenses
- Nephrology, CaliforniaPrimary
Nephrologists near Dr. Cha
Counts of nephrologists 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. Joseph K. Cha treated 21 Medicare patients in 2024, average age 62
CMS counts 21 Medicare patients who saw Dr. Cha in 2024. 75% of them have chronic kidney disease, and 75% have high blood pressure. Their average risk score is 7.20, where 1.00 is the Medicare average, so they are sicker than most Medicare patients.
Across all payers, Dmand AI patient panel data puts Dr. Cha's median patient age at 69, with 52% women.
Chronic conditions among Dr. Cha's Medicare patients, 2024
- Chronic kidney disease75%
- High blood pressure75%
- Diabetes67%
- High cholesterol67%
Share of Medicare patients with each condition. A patient can have several.
Dr. Cha's patients across all payers
Dmand AI patient panel data covers Medicare, Medicaid and commercial patients.
Patient panel by age, all payers
Median age 69
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. Joseph K. Cha wrote 1,570 Medicare Part D claims in 2024
In 2024, Dr. Cha wrote 1,570 Medicare Part D claims for 387 patients. 89% of them were for generic drugs. CMS names the drug for 1,345 of them, across 33 drugs with 11 or more claims each, at $138,837 in total drug cost. In 2023, CMS named 1,368 claims across 29 drugs.
Dr. Cha's Part D claims by kind of drug, 2024
- Generic1,397 claims89%
- Brand-name and other173 claims11%
Dr. Cha'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. Cha's Part D claims, 2024
- Antibiotics2%39 of 1,570 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: 1,3682024: 1,3452%
Drugs named by CMS: 33 in 2024, 29 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. Joseph K. Cha takes part in Medicare
Dr. Cha 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. Joseph K. Cha received $151 in industry payments from 2017 to 2018
CMS Open Payments shows 2 general payments to Dr. Cha from 2 drug and device companies from 2017 to 2018. Food and beverage make up the largest share, 100% of the total. Veloxis Pharmaceuticals, Inc. paid the most, $125.
General payments to Dr. Cha by program year, 2017 to 2018
Companies that paid Dr. Cha the most, 2017 to 2018
Share is of all general payments to this clinician.
Source: Open Payments (CMS), 2025 data, released July 7, 2026
Dr. Joseph K. Cha graduated from Loma Linda University School Of Medicine
Dr. Cha graduated from Loma Linda University School Of Medicine in 2007.
- Medical school
- Board certified in internal medicine
- Board certified in nephrology
Source: Dmand AI Professional Profile Data
Dr. Joseph K. Cha accepts plans from 2 insurance carriers
Dr. Cha is in network with 2 carriers, including Kaiser Permanente and CMS Medicare. EPO plans come from the most carriers, 1. Check the plan with the practice before a visit.
- Kaiser Permanente
- CMS Medicare
Plan types Dr. Cha accepts, by number of carriers
- EPO1
- HMO1
- Medicare1
- POS1
Source: Dmand AI Insurance Network Data
Sources for Dr. Joseph K. Cha'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 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) |
| 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. Joseph K. Cha
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. Joseph K. Cha's NPI number?
Dr. Joseph K. Cha's NPI number is 1902003668. It was assigned on June 27, 2007, and it is active in the NPI Registry.
What kind of doctor is Dr. Joseph K. Cha?
Dr. Joseph K. Cha is a nephrologist in Woodland Hills, California. The primary specialty in the NPI Registry is Nephrology Physician (taxonomy code 207RN0300X).
Where does Dr. Joseph K. Cha practice?
Dr. Cha practices at 5601 De Soto Avenue, Woodland Hills, CA 91367. Dr. Cha's primary practice is Kaiser Permanente Woodland Hills Medical Center in Woodland Hills, California, part of Kaiser Permanente. Dmand AI also links Dr. Cha to 1 dialysis center and 1 medical group.
What is Dr. Joseph K. Cha's office phone number?
The practice phone on file for Dr. Cha is (818) 719-3800.
What is Dr. Joseph K. Cha's medical license number?
Dr. Cha's California license number on file is A108677.
Which hospitals is Dr. Joseph K. Cha affiliated with?
Dr. Cha practices at Kaiser Permanente Woodland Hills Medical Center in Woodland Hills, California.
What medical group is Dr. Joseph K. Cha part of?
Dr. Cha is linked to Southern California Permanente Medical Group. Dmand AI links Dr. Cha to 1 more medical group.
Does Dr. Joseph K. Cha accept Medicare?
Yes. CMS lists Dr. Cha as accepting Medicare assignment.
How many Medicare patients does Dr. Joseph K. Cha see?
CMS counts 21 Medicare patients who saw Dr. Cha in 2024, with an average age of 62.
Is Dr. Joseph K. Cha board certified?
Yes. Dr. Cha is board certified in internal medicine by the American Board of Internal Medicine.
Show 5 more questionsShow fewer questions
Where did Dr. Joseph K. Cha go to medical school?
Dr. Cha graduated from Loma Linda University School Of Medicine in 2007.
What drugs does Dr. Joseph K. Cha prescribe most?
In 2024 Medicare Part D data, Dr. Cha's most prescribed drugs by claims were Spironolactone, Jardiance and Losartan Potassium.
Has Dr. Joseph K. Cha received payments from drug or device companies?
CMS Open Payments shows $151 in general payments to Dr. Cha from 2 companies from 2017 to 2018. The largest total came from Veloxis Pharmaceuticals, Inc.
How long has Dr. Joseph K. Cha been practicing?
Dr. Cha graduated from medical school in 2007, 19 years ago.
What insurance does Dr. Joseph K. Cha accept?
Dr. Cha is in network with 2 carriers, including Kaiser Permanente and CMS Medicare. EPO plans come from the most carriers, 1. Check the plan with the practice before a visit.
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