Dr. William Kenneth Halliday, MD
- Part D claims, 2024
- 2,442
- Industry payments
- $1,146
- Affiliated sites
- 1
- Medical group
- 1
- Insurance carriers
- 1
- Practice address
- 12900 Park Plaza Dr, Cerritos, CA 90703
- Practice phone
- Call (562) 622-2800
- Professional email
- Get professional email
- Personal email
- Get personal email
- Mobile number
- Get mobile number
Primary practice
Caremore Health Medical Partners West
Cerritos, California
Find Dr. Halliday'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. William Kenneth Halliday is a cardiologist in Cerritos, California
Dr. Halliday practices at Caremore Health Medical Partners West in Cerritos, California.
Dr. Halliday's NPI, 1013021708, was assigned on August 18, 2006. Dr. Halliday graduated from University Saskatchewan Royal Hospital in 1968. Dr. Halliday holds California license A23526.
- NPI
- 1013021708NPI Registry (opens in a new tab)
- Medicare PAC ID
- 4587675368
- NPI enumeration date
- August 18, 2006
- NPI status
- Active
- Accepts Medicare assignment
- Yes
- Practice phone
- (562) 622-2800
- Professional email
- Get email
- Personal email
- Get email
- Mobile number
- Get number
- Sex
- Male
- Estimated age
- 84
- Medical school graduation
- 1968
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; Dmand AI Practice Data; and Doctors and Clinicians National Downloadable File (CMS)
Dr. William Kenneth Halliday practices at Caremore Health Medical Partners West in Cerritos, California
Dr. Halliday's primary practice is Caremore Health Medical Partners West, at 12900 Park Plaza Dr, Cerritos, CA 90703 in Los Angeles County. The practice phone is (562) 622-2800.
- Caremore Health Medical Partners West12900 Park Plaza Dr, Cerritos, CA 90703 · Los Angeles CountyPhone(562) 622-2800
Sources: NPPES NPI Registry (CMS); and Dmand AI Practice Data
Dr. William Kenneth Halliday is affiliated with 2 sites of care and 1 medical group
Dr. Halliday's primary practice is Caremore Health Medical Partners West in Cerritos, California. The medical group on file is CareMore Medical Group. Dmand AI also links Dr. Halliday to 1 more group practice or clinic, 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. William Kenneth Halliday's practice
Dmand AI tracks the electronic health record (EHR) system at each site where Dr. Halliday practices. Vendor and product names are available with a free account.
| Site | EHR vendor and product |
|---|---|
| Caremore Health Medical Partners West | 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. William Kenneth Halliday is one of 2,375 cardiologists in California
Cardiovascular disease is Dr. Halliday's primary specialty in the NPI Registry, under taxonomy code 207RC0000X. Dr. Halliday is board certified in cardiovascular disease by the American Board of Internal Medicine. Dr. Halliday is licensed in California.
Specialties and state licenses
- Cardiovascular disease, CaliforniaPrimary
Cardiologists near Dr. Halliday
Counts of cardiologists 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. William Kenneth Halliday's patients have a median age of 77
Across all payers, Dmand AI patient panel data puts Dr. Halliday's median patient age at 77, with 51% women.
Dr. Halliday's patients across all payers
Dmand AI patient panel data covers Medicare, Medicaid and commercial patients.
Patient panel by age, all payers
Median age 77
Patient panel by sex, all payers
- Women51%
- Men49%
Source: Dmand AI Patient Panel Data
Dr. William Kenneth Halliday wrote 2,442 Medicare Part D claims in 2024
In 2024, Dr. Halliday wrote 2,442 Medicare Part D claims for 420 patients. 70% of them were for generic drugs. CMS names the drug for 2,301 of them, across 30 drugs with 11 or more claims each, at $559,462 in total drug cost. In 2023, CMS named 2,353 claims across 37 drugs.
Dr. Halliday's Part D claims by kind of drug, 2024
- Generic1,703 claims70%
- Brand-name739 claims30%
Dr. Halliday'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. Halliday's Part D claims, 2024
- Antibiotics1%14 of 2,442 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: 2,3532024: 2,3012%
Drugs named by CMS: 30 in 2024, 37 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. William Kenneth Halliday takes part in Medicare
Dr. Halliday 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. William Kenneth Halliday received $1,146 in industry payments from 2016 to 2024
CMS Open Payments shows 46 general payments to Dr. Halliday from 15 drug and device companies from 2016 to 2024. Food and beverage make up the largest share, 100% of the total. Bristol-Myers Squibb Company paid the most, $292.
General payments to Dr. Halliday by program year, 2016 to 2024
Companies that paid Dr. Halliday the most, 2016 to 2024
Share is of all general payments to this clinician.
Source: Open Payments (CMS), 2025 data, released July 7, 2026
Dr. William Kenneth Halliday has 1 award and honors on record
Dmand AI lists 1 award for Dr. Halliday.
Awards and honors for Dr. Halliday
- Undated
- ACC Fellow
Source: Dmand AI Professional Profile Data
Dr. William Kenneth Halliday graduated from University Saskatchewan Royal Hospital
Dr. Halliday graduated from University Saskatchewan Royal Hospital in 1968. Dr. Halliday is a member of ACC.
- Medical school
- Board certified in cardiovascular disease
- Board certified in internal medicine
Source: Dmand AI Professional Profile Data
Dr. William Kenneth Halliday accepts plans from 1 insurance carrier
Dr. Halliday is in network with 1 carrier, including Elevance. Medicare plans come from the most carriers, 1. Check the plan with the practice before a visit.
- Elevance
Plan types Dr. Halliday accepts, by number of carriers
- Medicare1
- PPO1
Source: Dmand AI Insurance Network Data
Sources for Dr. William Kenneth Halliday'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 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) |
| Awards and committee roles | Dmand AI Professional Profile Data |
| 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. William Kenneth Halliday
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. William Kenneth Halliday's NPI number?
Dr. William Kenneth Halliday's NPI number is 1013021708. It was assigned on August 18, 2006, and it is active in the NPI Registry.
What kind of doctor is Dr. William Kenneth Halliday?
Dr. William Kenneth Halliday is a cardiologist in Cerritos, California. The primary specialty in the NPI Registry is Cardiovascular Disease Physician (taxonomy code 207RC0000X).
Where does Dr. William Kenneth Halliday practice?
Dr. Halliday practices at 12900 Park Plaza Dr, Cerritos, CA 90703. Dr. Halliday's primary practice is Caremore Health Medical Partners West in Cerritos, California. Dmand AI also links Dr. Halliday to 1 group practice or clinic.
What is Dr. William Kenneth Halliday's office phone number?
The practice phone on file for Dr. Halliday is (562) 622-2800.
What is Dr. William Kenneth Halliday's medical license number?
Dr. Halliday holds California license A23526.
What medical group is Dr. William Kenneth Halliday part of?
Dr. Halliday is linked to CareMore Medical Group.
Does Dr. William Kenneth Halliday accept Medicare?
Yes. CMS lists Dr. Halliday as accepting Medicare assignment.
Is Dr. William Kenneth Halliday board certified?
Yes. Dr. Halliday is board certified in cardiovascular disease by the American Board of Internal Medicine.
Where did Dr. William Kenneth Halliday go to medical school?
Dr. Halliday graduated from University Saskatchewan Royal Hospital in 1968.
What drugs does Dr. William Kenneth Halliday prescribe most?
In 2024 Medicare Part D data, Dr. Halliday's most prescribed drugs by claims were Eliquis, Metoprolol Succinate and Carvedilol.
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Has Dr. William Kenneth Halliday received payments from drug or device companies?
CMS Open Payments shows $1,146 in general payments to Dr. Halliday from 15 companies from 2016 to 2024. The largest total came from Bristol-Myers Squibb Company.
How long has Dr. William Kenneth Halliday been practicing?
Dr. Halliday graduated from medical school in 1968, 58 years ago.
What insurance does Dr. William Kenneth Halliday accept?
Dr. Halliday is in network with 1 carrier, including Elevance. Medicare plans come from the most carriers, 1. Check the plan with the practice before a visit.
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