Chloe Ayako Tyau, PA-C
- Part D claims, 2024
- 176
- Industry payments
- $3,641
- Affiliated sites
- 1
- Medical group
- 1
- Year NPI issued
- 2020
- Practice address
- 1100 W Stewart Dr, Orange, CA 92868
- Practice phone
- Call (714) 633-9111
- Professional email
- Get professional email
- Personal email
- Get personal email
- Mobile number
- Get mobile number
Primary practice
St Joseph Hospital Orange
Orange, California
Find Chloe Tyau's professional email, personal email and mobile number
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Chloe Ayako Tyau is a physician assistant in Orange, California
Chloe Tyau practices at St Joseph Hospital Orange in Orange, California.
Chloe Tyau's NPI, 1174156194, was assigned on February 18, 2020.
- NPI
- 1174156194NPI Registry (opens in a new tab)
- NPI enumeration date
- February 18, 2020
- NPI status
- Active
- Practice phone
- (714) 633-9111
- Professional email
- Get email
- Personal email
- Get email
- Mobile number
- Get number
- Sex
- Female
- Estimated age
- 32
- Medical school graduation
- 2020
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; and Dmand AI Practice Data
Chloe Ayako Tyau practices at St Joseph Hospital Orange in Orange, California
Chloe Tyau's primary practice is St Joseph Hospital Orange, at 1100 W Stewart Dr, Orange, CA 92868 in Orange County. The practice phone is (714) 633-9111.
- St Joseph Hospital Orange1100 W Stewart Dr, Orange, CA 92868 · Orange CountyPhone(714) 633-9111
Sources: NPPES NPI Registry (CMS); and Dmand AI Practice Data
Chloe Ayako Tyau is affiliated with 2 sites of care and 1 medical group
Chloe Tyau's primary practice is St Joseph Hospital Orange in Orange, California. The medical group on file is Vascular & Interventional Specialists of Orange County. Dmand AI also links Chloe Tyau 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 Chloe Ayako Tyau's practice
Dmand AI tracks the electronic health record (EHR) system at each site where Chloe Tyau practices. Vendor and product names are available with a free account.
| Site | EHR vendor and product |
|---|---|
| St Joseph Hospital Orange | Available with a free account |
| +1 more affiliated site | Available with a free account |
Source: Dmand AI Technology Install Data
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Chloe Ayako Tyau is one of 11,482 physician assistants in California
Physician assistant is Chloe Tyau's primary specialty in the NPI Registry, under taxonomy code 363A00000X.
Specialties and state licenses
- Physician assistantPrimary
Physician assistants near Chloe Tyau
Counts of physician assistants 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
Chloe Ayako Tyau's patients have a median age of 68
Across all payers, Dmand AI patient panel data puts Chloe Tyau's median patient age at 68, with 50% women.
Chloe Tyau's patients across all payers
Dmand AI patient panel data covers Medicare, Medicaid and commercial patients.
Patient panel by age, all payers
Median age 68
Patient panel by sex, all payers
- Women50%
- Men50%
Source: Dmand AI Patient Panel Data
Chloe Ayako Tyau wrote 176 Medicare Part D claims in 2024
In 2024, Chloe Tyau wrote 176 Medicare Part D claims for 79 patients. 86% of them were for generic drugs. CMS names the drug for 148 of them, across 6 drugs with 11 or more claims each, at $12,383 in total drug cost.
Chloe Tyau's Part D claims by kind of drug, 2024
- Generic152 claims86%
- Brand-name24 claims14%
Chloe Tyau'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 Chloe Tyau's Part D claims, 2024
- Opioids23%41 of 176 claims
- Antibiotics13%22 of 176 claims
Share of all Part D claims for each drug class CMS reports on. Classes with no claims are left out.
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
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Chloe Ayako Tyau received $3,641 in industry payments from 2024 to 2025
CMS Open Payments shows 53 general payments to Chloe Tyau from 12 drug and device companies from 2024 to 2025. Food and beverage make up the largest share, 70% of the total. Penumbra, Inc. paid the most, $1,914.
General payments to Chloe Tyau by program year, 2024 to 2025
General payments to Chloe Tyau by kind, 2024 to 2025
- Food and beverage$2,54270%
- Travel and lodging$1,09930%
Companies that paid Chloe Tyau the most, 2024 to 2025
Share is of all general payments to this clinician.
Source: Open Payments (CMS), 2025 data, released July 7, 2026
Sources for Chloe Ayako Tyau'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) |
| Industry payments | Open Payments (CMS) (opens in a new tab) |
| 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 Chloe Ayako Tyau
Spotted something out of date? Email hello@dmand.ai and we will check the record. Contact details live in the free trial.
What is Chloe Ayako Tyau's NPI number?
Chloe Ayako Tyau's NPI number is 1174156194. It was assigned on February 18, 2020, and it is active in the NPI Registry.
What does Chloe Ayako Tyau specialize in?
Chloe Ayako Tyau is a physician assistant in Orange, California. The primary specialty in the NPI Registry is Physician Assistant (taxonomy code 363A00000X).
Where does Chloe Ayako Tyau practice?
Chloe Tyau practices at 1100 W Stewart Dr, Orange, CA 92868. Chloe Tyau's primary practice is St Joseph Hospital Orange in Orange, California. Dmand AI also links Chloe Tyau to 1 group practice or clinic.
What is Chloe Ayako Tyau's office phone number?
The practice phone on file for Chloe Tyau is (714) 633-9111.
What medical group is Chloe Ayako Tyau part of?
Chloe Tyau is linked to Vascular & Interventional Specialists of Orange County.
What drugs does Chloe Ayako Tyau prescribe most?
In 2024 Medicare Part D data, Chloe Tyau's most prescribed drugs by claims were Hydrocodone-Acetaminophen, Lorazepam and Ciprofloxacin HCl.
Has Chloe Ayako Tyau received payments from drug or device companies?
CMS Open Payments shows $3,641 in general payments to Chloe Tyau from 12 companies from 2024 to 2025. The largest total came from Penumbra, Inc.
How long has Chloe Ayako Tyau been practicing?
Chloe Tyau graduated from medical school in 2020, 6 years ago.
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