Dr. William Hayes Armstrong, MD
- Part D claims, 2024
- 41
- Hospital affiliations
- 4
- Industry payments
- $65
- Medical groups
- 2
- State license
- 1
- Practice address
- 1420 S Central Ave, Glendale, CA 91204
- Practice phone
- Call (818) 502-1900
- Professional email
- Get professional email
- Personal email
- Get personal email
- Mobile number
- Get mobile number
Find Dr. Armstrong'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 Hayes Armstrong is an emergency medicine physician in Glendale, California
Dr. Armstrong practices at Dignity Health - Glendale Memorial Hospital and Health Center in Glendale, California, part of CommonSpirit Health.
Dr. Armstrong's NPI, 1245960293, was assigned on June 13, 2022. Dr. Armstrong graduated from Virginia Commonwealth University, School of Medicine in 2022. Dr. Armstrong holds Virginia license 0116037078.
- NPI
- 1245960293NPI Registry (opens in a new tab)
- Medicare PAC ID
- 4789068446
- NPI enumeration date
- June 13, 2022
- NPI status
- Active
- Accepts Medicare assignment
- Yes
- Practice phone
- (818) 502-1900
- Professional email
- Get email
- Personal email
- Get email
- Mobile number
- Get number
- Sex
- Male
- Estimated age
- 30
- Medical school graduation
- 2022
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; Dmand AI Affiliation Data; and Doctors and Clinicians National Downloadable File (CMS)
Dr. William Hayes Armstrong practices at Dignity Health - Glendale Memorial Hospital and Health Center in Glendale, California
Dr. Armstrong's primary practice is Dignity Health - Glendale Memorial Hospital and Health Center, at 1420 S Central Ave, Glendale, CA 91204 in Los Angeles County. The practice phone is (818) 502-1900.
- Dignity Health - Glendale Memorial Hospital and Health Center1420 S Central Ave, Glendale, CA 91204 · Los Angeles CountyPhone(818) 502-1900
Source: Dmand AI Affiliation Data
Dr. William Hayes Armstrong is affiliated with 4 sites of care and 2 medical groups
Dr. Armstrong's primary practice is Dignity Health - Glendale Memorial Hospital and Health Center in Glendale, California, part of CommonSpirit Health. Dr. Armstrong is also affiliated with Dignity Health - Northridge Hospital Medical Center. The medical group on file is Golden State Emergency Physicians, Inc. Dmand AI also links Dr. Armstrong to 2 more hospitals 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. William Hayes Armstrong's practice
Dmand AI tracks the electronic health record (EHR) system at each site where Dr. Armstrong practices, 4 sites in all. Vendor and product names are available with a free account.
| Site | EHR vendor and product |
|---|---|
| Dignity Health - Glendale Memorial Hospital and Health Center | Available with a free account |
| +3 more sites and 1 medical group | Available with a free account |
Source: Dmand AI Technology Install Data
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Dr. William Hayes Armstrong is one of 7,423 emergency medicine physicians in California
Emergency medicine is Dr. Armstrong's primary specialty in the NPI Registry, under taxonomy code 207P00000X. Dr. Armstrong is licensed in Virginia.
Specialties and state licenses
- Emergency medicine, VirginiaPrimary
Emergency medicine physicians near Dr. Armstrong
Counts of emergency 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. William Hayes Armstrong's patients have a median age of 44
Across all payers, Dmand AI patient panel data puts Dr. Armstrong's median patient age at 44, with 53% women.
Dr. Armstrong's patients across all payers
Dmand AI patient panel data covers Medicare, Medicaid and commercial patients.
Patient panel by age, all payers
Median age 44
Patient panel by sex, all payers
- Women53%
- Men46%
Source: Dmand AI Patient Panel Data
Dr. William Hayes Armstrong wrote 41 Medicare Part D claims in 2024
In 2024, Dr. Armstrong wrote 41 Medicare Part D claims for 33 patients. 90% of them were for generic drugs.
Dr. Armstrong's Part D claims by kind of drug, 2024
- Generic37 claims90%
- Brand-name and other4 claims10%
Drug classes CMS tracks in Dr. Armstrong's Part D claims, 2024
- Antibiotics29%12 of 41 claims
Share of all Part D claims for each drug class CMS reports on. Classes with no claims are left out.
Source: Medicare Part D Prescribers - by Provider (CMS), 2024 data
How Dr. William Hayes Armstrong takes part in Medicare
Dr. Armstrong 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 Hayes Armstrong received $65 in industry payments from 2024 to 2025
CMS Open Payments shows 3 general payments to Dr. Armstrong from 2 drug and device companies from 2024 to 2025. Food and beverage make up the largest share, 69% of the total. Abbvie Inc. paid the most, $45.
General payments to Dr. Armstrong by program year, 2024 to 2025
General payments to Dr. Armstrong by kind, 2024 to 2025
- Food and beverage$4569%
- Education$2031%
Companies that paid Dr. Armstrong the most, 2024 to 2025
Share is of all general payments to this clinician.
Source: Open Payments (CMS), 2025 data, released July 7, 2026
Dr. William Hayes Armstrong graduated from Virginia Commonwealth University, School of Medicine
Dr. Armstrong graduated from Virginia Commonwealth University, School of Medicine in 2022.
- Medical school
Source: Dmand AI Professional Profile Data
Sources for Dr. William Hayes Armstrong'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 Data |
| Part D prescribing | 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 |
| 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 Hayes Armstrong
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 Hayes Armstrong's NPI number?
Dr. William Hayes Armstrong's NPI number is 1245960293. It was assigned on June 13, 2022, and it is active in the NPI Registry.
What kind of doctor is Dr. William Hayes Armstrong?
Dr. William Hayes Armstrong is an emergency medicine physician in Glendale, California. The primary specialty in the NPI Registry is Emergency Medicine Physician (taxonomy code 207P00000X).
Where does Dr. William Hayes Armstrong practice?
Dr. Armstrong practices at 1420 S Central Ave, Glendale, CA 91204. Dr. Armstrong's primary practice is Dignity Health - Glendale Memorial Hospital and Health Center in Glendale, California, part of CommonSpirit Health. Dmand AI also links Dr. Armstrong to 2 hospitals and 1 medical group.
What is Dr. William Hayes Armstrong's office phone number?
The practice phone on file for Dr. Armstrong is (818) 502-1900.
What is Dr. William Hayes Armstrong's medical license number?
Dr. Armstrong holds Virginia license 0116037078.
Which hospitals is Dr. William Hayes Armstrong affiliated with?
Dr. Armstrong practices at Dignity Health - Glendale Memorial Hospital and Health Center in Glendale, California. Dr. Armstrong is also affiliated with Dignity Health - Northridge Hospital Medical Center. Dmand AI links Dr. Armstrong to 2 more hospitals.
What medical group is Dr. William Hayes Armstrong part of?
Dr. Armstrong is linked to Golden State Emergency Physicians, Inc. Dmand AI links Dr. Armstrong to 1 more medical group.
Does Dr. William Hayes Armstrong accept Medicare?
Yes. CMS lists Dr. Armstrong as accepting Medicare assignment.
Where did Dr. William Hayes Armstrong go to medical school?
Dr. Armstrong graduated from Virginia Commonwealth University, School of Medicine in 2022.
Has Dr. William Hayes Armstrong received payments from drug or device companies?
CMS Open Payments shows $65 in general payments to Dr. Armstrong from 2 companies from 2024 to 2025. The largest total came from Abbvie Inc.
How long has Dr. William Hayes Armstrong been practicing?
Dr. Armstrong graduated from medical school in 2022, 4 years ago.
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