Aortic ValveCausalityHeart Valve Prosthesis
Dr. John Y. Ko, MD
NPI1972605541PAC ID1254509300
- Medicare patients, 2024
- 16
- Part D claims, 2024
- 425
- Publications
- 1
- Hospital affiliations
- 2
- Industry payments
- $13,579
- Practice address
- 6600 Bruceville Road, Sacramento, CA 95823
- Practice phone
- Call (916) 688-2000
- Professional email
- Get professional email
- Personal email
- Get personal email
- Mobile number
- Get mobile number
Primary practice
Find Dr. Ko'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 Y. Ko is a cardiologist in Sacramento, California
Dr. Ko practices at Kaiser Permanente South Sacramento Medical Center in Sacramento, California, part of Kaiser Permanente.
Dr. Ko's NPI, 1972605541, was assigned on September 2, 2006. Dr. Ko graduated from David Geffen School of Medicine at UCLA in 2004. Dr. Ko holds California license A99005.
NPI and contact details
- NPI
- 1972605541NPI Registry (opens in a new tab)
- Medicare PAC ID
- 1254509300
- NPI enumeration date
- September 2, 2006
- NPI status
- Active
- Accepts Medicare assignment
- Yes
- Practice phone
- (916) 688-2000
- 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 Affiliation Data; and Doctors and Clinicians National Downloadable File (CMS)
Dr. John Y. Ko practices at Kaiser Permanente South Sacramento Medical Center in Sacramento, California
Dr. Ko's primary practice is Kaiser Permanente South Sacramento Medical Center, at 6600 Bruceville Road, Sacramento, CA 95823 in Sacramento County. The practice phone is (916) 688-2000.
- Kaiser Permanente South Sacramento Medical Center6600 Bruceville Road, Sacramento, CA 95823 · Sacramento CountyPhone(916) 688-2000
Source: Dmand AI Affiliation Data
Dr. John Y. Ko is affiliated with 2 sites of care and 1 medical group
Dr. Ko's primary practice is Kaiser Permanente South Sacramento Medical Center in Sacramento, California, part of Kaiser Permanente. Dr. Ko is also affiliated with Sacramento Medical Center. The medical group on file is The Permanente Medical Group, Inc.
Sources: Dmand AI Affiliation Data; and Dmand AI Org Hierarchy Data
Dmand AI tracks the EHR system at Dr. John Y. Ko's practice
Dmand AI tracks the electronic health record (EHR) system at each site where Dr. Ko practices, 2 sites in all. Vendor and product names are available with a free account.
| Site | EHR vendor and product |
|---|---|
| Kaiser Permanente South Sacramento Medical Center | 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. John Y. Ko is one of 2,375 cardiologists in California
Cardiovascular disease is Dr. Ko's primary specialty in the NPI Registry, under taxonomy code 207RC0000X. Dr. Ko is board certified in cardiovascular disease by the American Board of Internal Medicine. Dr. Ko is licensed in California.
Specialties and state licenses
- Cardiovascular disease, CaliforniaPrimary
Clinical focus
Dmand AI lists angioplasty among the conditions Dr. Ko treats.
Cardiologists near Dr. Ko
Counts of cardiologists with a Dmand AI profile, by place and practice. Each opens the list.
2,375cardiologists in California113cardiologists in Sacramento7cardiologists at Kaiser Permanente South Sacramento Medical Center
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; and Dmand AI Peer Benchmarks
Dr. John Y. Ko treated 16 Medicare patients in 2024, average age 71
CMS counts 16 Medicare patients who saw Dr. Ko in 2024. 75% of them have high blood pressure, and 75% have high cholesterol. Their average risk score is 1.04, where 1.00 is the Medicare average.
Across all payers, Dmand AI patient panel data puts Dr. Ko's median patient age at 71, with 39% women.
Medicare patients, 202416
Average age71
Average risk score1.04
Chronic conditions among Dr. Ko's Medicare patients, 2024
- High blood pressure75%
- High cholesterol75%
- Ischemic heart disease75%
Share of Medicare patients with each condition. A patient can have several.
Dr. Ko'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
- Women39%
- Men61%
Sources: Dmand AI Patient Panel Data; and Medicare Physician & Other Practitioners - by Provider (CMS), 2024 data
Dr. John Y. Ko wrote 425 Medicare Part D claims in 2024
In 2024, Dr. Ko wrote 425 Medicare Part D claims for 125 patients. 90% of them were for generic drugs. CMS names the drug for 283 of them, across 13 drugs with 11 or more claims each, at $39,100 in total drug cost. In 2023, CMS named 285 claims across 13 drugs.
Part D claims, 2024425
Drugs named by CMS13
Total drug cost$39,100
Part D patients125
Dr. Ko's Part D claims by kind of drug, 2024
- Generic381 claims90%
- Brand-name44 claims10%
Dr. Ko'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. Ko's Part D claims, 2024
- Antibiotics4%18 of 425 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: 2852024: 2831%
Drugs named by CMS: 13 in 2024, 13 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. John Y. Ko takes part in Medicare
Dr. Ko accepts Medicare assignment, so Medicare's approved amount is taken as full payment.
- Accepts Medicare assignment
- Yes
Coronary angioplasty and stenting: 1 to 10 procedures (CMS shows small counts as a range)
Sources: Doctors and Clinicians National Downloadable File (CMS); and Doctors and Clinicians Utilization Data (CMS)
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Dr. John Y. Ko has 1 publication on record
Dmand AI links 1 paper to Dr. Ko. Dr. Ko's most frequent co-authors are Joseph Huh, MD and Femi Philip, MD.
Papers1
Dr. Ko's most frequent co-authors
Recent publications by Dr. Ko
See who Dr. Ko researches with
Physician Network Discovery turns co-authorship, shared hospitals and shared groups into a map of who Dr. Ko works with, so you can find a warm path to the right cardiologists.
Sources: PubMed (National Library of Medicine); and Dmand AI Research Linkage
Dr. John Y. Ko received $13,579 in industry payments from 2016 to 2025
CMS Open Payments shows 360 general payments to Dr. Ko from 16 drug and device companies from 2016 to 2025. Food and beverage make up the largest share, 80% of the total. Medtronic, Inc. paid the most, $3,815.
General payments to Dr. Ko by program year, 2016 to 2025
General payments to Dr. Ko by kind, 2016 to 2025
$13.6Kin total
- Food and beverage$10,86880%
- Travel and lodging$2,57019%
- Grants$1411%
Companies that paid Dr. Ko 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. John Y. Ko graduated from David Geffen School of Medicine at UCLA
Dr. Ko graduated from David Geffen School of Medicine at UCLA in 2004. Dr. Ko is a member of ACC.
- Medical school
- Board certified in cardiovascular disease
- Board certified in interventional cardiology
Source: Dmand AI Professional Profile Data
Dr. John Y. Ko accepts plans from 7 insurance carriers
Dr. Ko is in network with 7 carriers, including Elevance, Kaiser Permanente and Blue Cross Blue Shield of Massachusetts. Medicare plans come from the most carriers, 6. Check the plan with the practice before a visit.
- Elevance
- Kaiser Permanente
- Blue Cross Blue Shield of Massachusetts
- Blue Cross Blue Shield of Michigan
- HCSC
- Regence Health Plans
- CMS Medicare
Plan types Dr. Ko accepts, by number of carriers
- Medicare6
- PPO5
- EPO2
- HMO2
- POS2
Source: Dmand AI Insurance Network Data
Sources for Dr. John Y. Ko'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)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. John Y. Ko
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 Y. Ko's NPI number?
Dr. John Y. Ko's NPI number is 1972605541. It was assigned on September 2, 2006, and it is active in the NPI Registry.
What kind of doctor is Dr. John Y. Ko?
Dr. John Y. Ko is a cardiologist in Sacramento, California. The primary specialty in the NPI Registry is Cardiovascular Disease Physician (taxonomy code 207RC0000X).
Where does Dr. John Y. Ko practice?
Dr. Ko practices at 6600 Bruceville Road, Sacramento, CA 95823. Dr. Ko's primary practice is Kaiser Permanente South Sacramento Medical Center in Sacramento, California, part of Kaiser Permanente.
What is Dr. John Y. Ko's office phone number?
The practice phone on file for Dr. Ko is (916) 688-2000.
What is Dr. John Y. Ko's medical license number?
Dr. Ko holds California license A99005.
Which hospitals is Dr. John Y. Ko affiliated with?
Dr. Ko practices at Kaiser Permanente South Sacramento Medical Center in Sacramento, California. Dr. Ko is also affiliated with Sacramento Medical Center.
What medical group is Dr. John Y. Ko part of?
Dr. Ko is linked to The Permanente Medical Group, Inc.
Does Dr. John Y. Ko accept Medicare?
Yes. CMS lists Dr. Ko as accepting Medicare assignment.
How many Medicare patients does Dr. John Y. Ko see?
CMS counts 16 Medicare patients who saw Dr. Ko in 2024, with an average age of 71.
Is Dr. John Y. Ko board certified?
Yes. Dr. Ko is board certified in cardiovascular disease by the American Board of Internal Medicine.
Show 7 more questionsShow fewer questions
Where did Dr. John Y. Ko go to medical school?
Dr. Ko graduated from David Geffen School of Medicine at UCLA in 2004.
What drugs does Dr. John Y. Ko prescribe most?
In 2024 Medicare Part D data, Dr. Ko's most prescribed drugs by claims were Atorvastatin Calcium, Metoprolol Succinate and Furosemide.
Has Dr. John Y. Ko received payments from drug or device companies?
CMS Open Payments shows $13,579 in general payments to Dr. Ko from 16 companies from 2016 to 2025. The largest total came from Medtronic, Inc.
How long has Dr. John Y. Ko been practicing?
Dr. Ko graduated from medical school in 2004, 22 years ago.
Does Dr. John Y. Ko do research?
Dmand AI links 1 publication to Dr. Ko.
Who does Dr. John Y. Ko publish with?
Dr. Ko's most frequent co-authors are Joseph Huh, MD (1 shared paper) and Femi Philip, MD (1 shared paper).
What insurance does Dr. John Y. Ko accept?
Dr. Ko is in network with 7 carriers, including Elevance, Kaiser Permanente and Blue Cross Blue Shield of Massachusetts. Medicare plans come from the most carriers, 6. Check the plan with the practice before a visit.
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