Dr. Angela Ross Hay, MD
- Medicare services, 2024
- 49
- Medicare patients, 2024
- 28
- Part D claims, 2024
- 410
- Hospital affiliations
- 2
- Industry payments
- $1,193
- Practice address
- 100 W. California Blvd, Pasadena, CA 91105
- Practice phone
- Call (626) 397-2618
- Professional email
- Get professional email
- Personal email
- Get personal email
- Mobile number
- Get mobile number
Primary practice
Huntington Hospital - Unit
Acute Care Hospital-Unit · Pasadena, California
Find Dr. Hay'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. Angela Ross Hay is a pulmonologist in Pasadena, California
Dr. Hay practices at Huntington Hospital - Unit in Pasadena, California.
Dr. Hay's NPI, 1194737080, was assigned on August 12, 2006. Dr. Hay graduated from Indiana University School Of Medicine in 1989. Dr. Hay holds California license G70207.
- NPI
- 1194737080NPI Registry (opens in a new tab)
- Medicare PAC ID
- 6507767688
- NPI enumeration date
- August 12, 2006
- NPI status
- Active
- Accepts Medicare assignment
- Yes
- Practice phone
- (626) 397-2618
- Professional email
- Get email
- Personal email
- Get email
- Mobile number
- Get number
- Sex
- Female
- Estimated age
- 63
- Medical school graduation
- 1989
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; Dmand AI Affiliation Data; and Doctors and Clinicians National Downloadable File (CMS)
Dr. Angela Ross Hay practices at Huntington Hospital - Unit in Pasadena, California
Dr. Hay's primary practice is Huntington Hospital - Unit, at 100 W. California Blvd, Pasadena, CA 91105 in Los Angeles County. The practice phone is (626) 397-2618.
- Huntington Hospital - Unit100 W. California Blvd, Pasadena, CA 91105 · Los Angeles CountyPhone(626) 397-2618
Source: Dmand AI Affiliation Data
Dr. Angela Ross Hay is affiliated with 3 sites of care and 1 medical group
Dr. Hay's primary practice is Huntington Hospital - Unit in Pasadena, California. Dr. Hay is also affiliated with Huntington Hospital. The medical group on file is Optum - Downtown Los Angeles. Dmand AI also links Dr. Hay to 1 more group practice or clinic, named with a free account.
Source: Dmand AI Affiliation Data
Dmand AI tracks the EHR system at Dr. Angela Ross Hay's practice
Dmand AI tracks the electronic health record (EHR) system at each site where Dr. Hay practices, 3 sites in all. Vendor and product names are available with a free account.
| Site | EHR vendor and product |
|---|---|
| Huntington Hospital - Unit | Available with a free account |
| +2 more affiliated sites | Available with a free account |
Source: Dmand AI Technology Install Data
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Dr. Angela Ross Hay is one of 1,339 pulmonologists in California
Pulmonary disease is Dr. Hay's primary specialty in the NPI Registry, under taxonomy code 207RP1001X. Dr. Hay is board certified in internal medicine by the American Board of Internal Medicine. Dr. Hay is licensed in California.
Specialties and state licenses
- Pulmonary disease, CaliforniaPrimary
Clinical focus
Dmand AI lists congestive heart failure and sepsis among the conditions Dr. Hay treats.
Pulmonologists near Dr. Hay
Counts of pulmonologists 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. Angela Ross Hay billed Medicare for 49 services in 2024
CMS data shows 49 Medicare services from Dr. Hay across 2 procedure codes in 2024, for 28 Medicare patients. Medicare paid $4,627 for them. Every service was in a facility, such as a hospital, rather than an office.
Dr. Hay's Medicare services by type, 2022 to 2024
- 2022
- 2024
- Office and hospital visits
- 2022: 852024: 4942%
Dr. Hay compared with the California median for pulmonologists, 2024
- Dr. Hay
- California median
- Medicare services
- 49vs 64992% below
- Medicare patients
- 28vs 27290% below
- Part D claims
- 152vs 42164% below
Medians across 1,263 pulmonologists in California with Dmand AI profiles that report each measure.
Dr. Hay's most billed Medicare procedure codes, 2024
CMS publishes codes billed for 11 or more Medicare patients. Each label is the code family; CPT descriptions are licensed by the AMA.
Need commercial claims for Dr. Hay?
Medicare shows one payer. Book a meeting to get commercial claims data for Dr. Hay and other pulmonologists in California.
Sources: Medicare Physician & Other Practitioners - by Provider and Service (CMS), 2024 data; and Dmand AI Peer Benchmarks
Dr. Angela Ross Hay treated 28 Medicare patients in 2024, average age 78
CMS counts 28 Medicare patients who saw Dr. Hay in 2024. The largest group is 75 to 84, with 14 patients. 75% of them have high blood pressure, and 75% have high cholesterol. Their average risk score is 3.48, 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. Hay's median patient age at 75, with 53% women.
Dr. Hay's Medicare patients by age, 2024
CMS leaves out age groups with fewer than 11 patients.
Dr. Hay's Medicare patients by sex, 2024
- Women1657%
- Men1243%
Chronic conditions among Dr. Hay's Medicare patients, 2024
- High blood pressure75%
- High cholesterol75%
- Arthritis71%
- Chronic kidney disease64%
- Diabetes50%
- Heart failure50%
- Ischemic heart disease50%
- Atrial fibrillation43%
Share of Medicare patients with each condition. A patient can have several.
Dr. Hay's patients across all payers
Dmand AI patient panel data covers Medicare, Medicaid and commercial patients.
Patient panel by age, all payers
Median age 75
Patient panel by sex, all payers
- Women53%
- Men47%
Sources: Dmand AI Patient Panel Data; and Medicare Physician & Other Practitioners - by Provider (CMS), 2024 data
Dr. Angela Ross Hay wrote 410 Medicare Part D claims in 2024
In 2024, Dr. Hay wrote 410 Medicare Part D claims for 145 patients. 86% of them were for generic drugs. CMS names the drug for 152 of them, across 9 drugs with 11 or more claims each, at $17,622 in total drug cost. In 2023, CMS named 96 claims across 5 drugs.
Dr. Hay's Part D claims by kind of drug, 2024
- Generic353 claims86%
- Brand-name57 claims14%
Dr. Hay'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. Hay's Part D claims, 2024
- Opioids5%19 of 410 claims
- Antibiotics15%62 of 410 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: 962024: 15258%
Drugs named by CMS: 9 in 2024, 5 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. Angela Ross Hay takes part in Medicare
Dr. Hay 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. Angela Ross Hay received $1,193 in industry payments from 2016 to 2025
CMS Open Payments shows 61 general payments to Dr. Hay from 10 drug and device companies from 2016 to 2025. Food and beverage make up the largest share, 100% of the total. Bristol-Myers Squibb Company paid the most, $298.
General payments to Dr. Hay by program year, 2016 to 2025
Companies that paid Dr. Hay 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. Angela Ross Hay graduated from Indiana University School Of Medicine
Dr. Hay graduated from Indiana University School Of Medicine in 1989. Dr. Hay is a member of ACP.
- Medical school
- Board certified in internal medicine
Source: Dmand AI Professional Profile Data
Dr. Angela Ross Hay accepts plans from 6 insurance carriers
Dr. Hay is in network with 6 carriers, including Elevance, Blue Cross Blue Shield of Michigan 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
- Blue Cross Blue Shield of Michigan
- Blue Cross Blue Shield of Massachusetts
- HCSC
- Regence Health Plans
- Molina
Plan types Dr. Hay accepts, by number of carriers
- Medicare6
- PPO5
- HMO2
- POS2
- EPO1
Source: Dmand AI Insurance Network Data
Sources for Dr. Angela Ross Hay'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 Data |
| Medicare services and procedure codes | Medicare Physician & Other Practitioners - by Provider and Service (CMS) (opens in a new tab) |
| State medians for the same specialty | Dmand AI Peer Benchmarks |
| 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. Angela Ross Hay
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. Angela Ross Hay's NPI number?
Dr. Angela Ross Hay's NPI number is 1194737080. It was assigned on August 12, 2006, and it is active in the NPI Registry.
What kind of doctor is Dr. Angela Ross Hay?
Dr. Angela Ross Hay is a pulmonologist in Pasadena, California. The primary specialty in the NPI Registry is Pulmonary Disease Physician (taxonomy code 207RP1001X).
Where does Dr. Angela Ross Hay practice?
Dr. Hay practices at 100 W. California Blvd, Pasadena, CA 91105. Dr. Hay's primary practice is Huntington Hospital - Unit in Pasadena, California. Dmand AI also links Dr. Hay to 1 group practice or clinic.
What is Dr. Angela Ross Hay's office phone number?
The practice phone on file for Dr. Hay is (626) 397-2618.
What is Dr. Angela Ross Hay's medical license number?
Dr. Hay holds California license G70207.
Which hospitals is Dr. Angela Ross Hay affiliated with?
Dr. Hay is affiliated with Huntington Hospital. Dmand AI links Dr. Hay to 1 more hospital.
What medical group is Dr. Angela Ross Hay part of?
Dr. Hay is linked to Optum - Downtown Los Angeles.
Does Dr. Angela Ross Hay accept Medicare?
Yes. CMS data shows Dr. Hay billed Medicare for 49 services in 2024, and Dr. Hay accepts Medicare assignment.
How many Medicare patients does Dr. Angela Ross Hay see?
CMS counts 28 Medicare patients who saw Dr. Hay in 2024, with an average age of 78.
Is Dr. Angela Ross Hay board certified?
Yes. Dr. Hay is board certified in internal medicine by the American Board of Internal Medicine.
Show 6 more questionsShow fewer questions
What services does Dr. Angela Ross Hay bill to Medicare?
In 2024, Dr. Hay's most billed Medicare services were hospital inpatient care (99233) and hospital inpatient care (99239).
Where did Dr. Angela Ross Hay go to medical school?
Dr. Hay graduated from Indiana University School Of Medicine in 1989.
What drugs does Dr. Angela Ross Hay prescribe most?
In 2024 Medicare Part D data, Dr. Hay's most prescribed drugs by claims were Eliquis, Amlodipine Besylate and Carvedilol.
Has Dr. Angela Ross Hay received payments from drug or device companies?
CMS Open Payments shows $1,193 in general payments to Dr. Hay from 10 companies from 2016 to 2025. The largest total came from Bristol-Myers Squibb Company.
How long has Dr. Angela Ross Hay been practicing?
Dr. Hay graduated from medical school in 1989, 37 years ago.
What insurance does Dr. Angela Ross Hay accept?
Dr. Hay is in network with 6 carriers, including Elevance, Blue Cross Blue Shield of Michigan 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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