William Halliday, M.D.
Cardiovascular Disease Physician · Montebello, CA
William Halliday, M.D. is a cardiovascular disease physician with a practice address in Montebello, California, and NPI 1013021708, issued on Aug 18, 2006. Check the license (California A23526, as entered in NPPES) on the Medical Board of California; the Medicare figures below come from public CMS files.
- Name
- William Halliday
- Credential
- M.D.
- Primary taxonomy
- Cardiovascular Disease Physician 207RC0000X
- License number
- A23526 CA
Self-reported in NPPES; status is on the state search - Practice location
- 2444 W Beverly Blvd, Montebello, CA 90640
- Phone
- (323) 201-4130
- Enumerated
- Aug 18, 2006
- Entity
- Type 1 · individual
Also registered at 2444 W Beverly Blvd
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Heain Aung, FNP-CNurse Practitioner1457969032
- Esmeralda Galaviz, MS, RDNRegistered Dietitian1225545080
- Liliane Idylle, D.O.Internal Medicine Physician1114298957
- Cathy Liang, FNPFamily Nurse Practitioner1669215745
- Blanca Torres, N.P.Family Nurse Practitioner1487078952
- Simon WongPhysician Assistant1669878906
Verify William Halliday in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMedical Board of California
Search for license A23526Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS, AOA, NCCPA, AANPNot checked
22% fewer Medicare Part D claims than the average cardiovascular disease physician in 2024
2,442 Medicare Part D claims for 420 beneficiaries, against an average of 3,149 among the 19,556 providers of this specialty who prescribed in Part D. Brand-name drugs were 30% of claims.
Most prescribed
- Eliquis531 claims
- Metoprolol Succinate237 claims
- Carvedilol190 claims
- Atorvastatin Calcium132 claims
- Losartan Potassium111 claims
- Entresto104 claims
Source: CMS Medicare Part D Prescribers by Provider and Drug, 2024 (data.cms.gov). Part D covers prescriptions for Medicare patients only; drugs with fewer than 11 claims are not published.
Industry payments in 2024: $17.83
1 payment, mostly food and beverage; the largest payer was Pfizer Inc.. The 16,209 providers of this specialty with any payment received $4,923.81 on average. Payments are reported by manufacturers, not by the provider, and are not a sign of wrongdoing.
Source: CMS Open Payments, program year 2024 (openpaymentsdata.cms.gov); average among providers of this specialty with at least one payment.
One hospital or facility affiliation
- Albion Medical Partners OF California West PCCerritos, CA
Source: CMS Doctors and Clinicians affiliations; Hospital General Information (Care Compare) (data.cms.gov). Star ratings are CMS hospital ratings, not ratings of this provider.
Cardiovascular Disease Physician providers in California
There are 2,322 cardiovascular disease physician records in California.
Other cardiovascular disease physician records in California
- Abdul Abbasi, MDLong Beach, CA1710071717
- Lillian Abdelmalek, MDSacramento, CA1881343796
- Robin Abdelmalik, M.D. FACCTemecula, CA1275656662
- Roberto Abdelnur, MDEl Centro, CA1982648606
- Sohail Abdi-Moradi, M.D.Moorpark, CA1376862938
- Nadia Abelhad, M.D.Chula Vista, CA1619400801
- Mohammad Abid, MD FACCIndio, CA1699857706
- Georges Abou Rjaili, MDRiverside, CA1073896544
- Maria Abraham, M.D.San Francisco, CA1669436960
- Theodore Abraham, M.D.San Francisco, CA1467427096
Common questions
What is William Halliday, M.D.'s NPI number?
William Halliday, M.D.'s National Provider Identifier (NPI) is 1013021708, issued on Aug 18, 2006. An NPI identifies a provider in billing; it is not a license.
Where is William Halliday, M.D. located?
The NPPES record lists a practice address at 2444 W Beverly Blvd, Montebello, CA, 90640. Phone: (323) 201-4130. Providers update this record themselves, so call before visiting.
How can I verify William Halliday, M.D.'s license?
NPPES lists California license number A23526, as entered by the provider. Search the Medical Board of California at https://www.mbc.ca.gov/License-Verification/default.aspx. The NPPES record confirms identity only; the state search shows license status, expiration and public orders.
How much does William Halliday, M.D. prescribe under Medicare Part D?
In 2024, William Halliday, M.D. had 2,442 Medicare Part D claims for 420 beneficiaries; the average among cardiovascular disease physician prescribers was 3,149. Part D covers Medicare prescriptions only.
Source: CMS National Plan and Provider Enumeration System (NPPES), loaded Aug 27, 2026 (NPPES files on CMS.gov); NUCC Health Care Provider Taxonomy. Medicare files from data.cms.gov. An NPI identifies who bills; it is not a license.
Every figure on PlainDoctor is rendered directly from the federal CMS NPPES registry, Medicare Part D, MIPS, and Open Payments records, no number is typed in by an editor. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error. Data current as of Aug 27, 2026.