Dr. Catherine Ann Holladay, DO
- Part D claims, 2024
- 873
- Hospital affiliations
- 1
- Industry payments
- $7,119
- State license
- 1
- Year NPI issued
- 2005
- Practice address
- 1111 Hayes Avenue, Sandusky, OH 44870
- Practice phone
- Call (419) 557-7400
- Professional email
- Get professional email
- Personal email
- Get personal email
- Mobile number
- Get mobile number
Primary practice
Find Dr. Holladay's professional email, personal email and mobile number
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Dr. Catherine Ann Holladay is a psychiatrist in Sandusky, Ohio
Dr. Holladay practices at Firelands Regional Medical Center in Sandusky, Ohio, part of Firelands Health.
Dr. Holladay's NPI, 1538153291, was assigned on September 8, 2005. Dr. Holladay holds Ohio license 34005818H.
- NPI
- 1538153291NPI Registry (opens in a new tab)
- NPI enumeration date
- September 8, 2005
- NPI status
- Active
- Practice phone
- (419) 557-7400
- Professional email
- Get email
- Personal email
- Get email
- Mobile number
- Get number
- Sex
- Female
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; and Dmand AI Affiliation Data
Dr. Catherine Ann Holladay practices at Firelands Regional Medical Center in Sandusky, Ohio
Dr. Holladay's primary practice is Firelands Regional Medical Center, at 1111 Hayes Avenue, Sandusky, OH 44870 in Erie County. The practice phone is (419) 557-7400.
- Firelands Regional Medical Center1111 Hayes Avenue, Sandusky, OH 44870 · Erie CountyPhone(419) 557-7400
Source: Dmand AI Affiliation Data
Dr. Catherine Ann Holladay is affiliated with 1 site of care
Dr. Holladay's primary practice is Firelands Regional Medical Center in Sandusky, Ohio, part of Firelands Health.
Sources: Dmand AI Affiliation Data; and Dmand AI Org Hierarchy Data
Dmand AI tracks the EHR system at Dr. Catherine Ann Holladay's practice
Dmand AI tracks the electronic health record (EHR) system at each site where Dr. Holladay practices. Vendor and product names are available with a free account.
| Site | EHR vendor and product |
|---|---|
| Firelands Regional Medical Center | Available with a free account |
Source: Dmand AI Technology Install Data
For health IT teams
Dmand AI maps EHR vendors, IT decision makers and buying committees across Firelands Health and 6.2K+ hospitals, with verified contacts in the same login.
Dr. Catherine Ann Holladay is one of 1,227 psychiatrists in Ohio
Psychiatry is Dr. Holladay's primary specialty in the NPI Registry, under taxonomy code 2084P0800X. Dr. Holladay is licensed in Ohio.
Specialties and state licenses
- Psychiatry, OhioPrimary
Psychiatrists near Dr. Holladay
Counts of psychiatrists 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. Catherine Ann Holladay's patients have a median age of 55
Across all payers, Dmand AI patient panel data puts Dr. Holladay's median patient age at 55, with 66% women.
Dr. Holladay's patients across all payers
Dmand AI patient panel data covers Medicare, Medicaid and commercial patients.
Patient panel by age, all payers
Median age 55
Patient panel by sex, all payers
- Women66%
- Men34%
Source: Dmand AI Patient Panel Data
Dr. Catherine Ann Holladay wrote 873 Medicare Part D claims in 2024
In 2024, Dr. Holladay wrote 873 Medicare Part D claims for 67 patients. 95% of them were for generic drugs. CMS names the drug for 798 of them, across 21 drugs with 11 or more claims each, at $23,773 in total drug cost. In 2023, CMS named 678 claims across 20 drugs.
Dr. Holladay's Part D claims by kind of drug, 2024
- Generic830 claims95%
- Brand-name43 claims5%
Dr. Holladay'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. Holladay's Part D claims, 2024
- Antipsychotics, patients 65 and over3%29 of 873 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: 6782024: 79818%
Drugs named by CMS: 21 in 2024, 20 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
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Dr. Catherine Ann Holladay received $7,119 in industry payments from 2016 to 2025
CMS Open Payments shows 152 general payments to Dr. Holladay from 15 drug and device companies from 2016 to 2025. Food and beverage make up the largest share, 100% of the total. Otsuka America Pharmaceutical, Inc. paid the most, $1,721.
General payments to Dr. Holladay by program year, 2016 to 2025
Companies that paid Dr. Holladay the most, 2016 to 2025
Share is of all general payments to this clinician.
Source: Open Payments (CMS), 2025 data, released July 7, 2026
Sources for Dr. Catherine Ann Holladay'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 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 Dr. Catherine Ann Holladay
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. Catherine Ann Holladay's NPI number?
Dr. Catherine Ann Holladay's NPI number is 1538153291. It was assigned on September 8, 2005, and it is active in the NPI Registry.
What kind of doctor is Dr. Catherine Ann Holladay?
Dr. Catherine Ann Holladay is a psychiatrist in Sandusky, Ohio. The primary specialty in the NPI Registry is Psychiatry Physician (taxonomy code 2084P0800X).
Where does Dr. Catherine Ann Holladay practice?
Dr. Holladay practices at 1111 Hayes Avenue, Sandusky, OH 44870. Dr. Holladay's primary practice is Firelands Regional Medical Center in Sandusky, Ohio, part of Firelands Health.
What is Dr. Catherine Ann Holladay's office phone number?
The practice phone on file for Dr. Holladay is (419) 557-7400.
What is Dr. Catherine Ann Holladay's medical license number?
Dr. Holladay holds Ohio license 34005818H.
Which hospitals is Dr. Catherine Ann Holladay affiliated with?
Dr. Holladay practices at Firelands Regional Medical Center in Sandusky, Ohio.
What drugs does Dr. Catherine Ann Holladay prescribe most?
In 2024 Medicare Part D data, Dr. Holladay's most prescribed drugs by claims were Clonazepam, Trazodone HCl and Escitalopram Oxalate.
Has Dr. Catherine Ann Holladay received payments from drug or device companies?
CMS Open Payments shows $7,119 in general payments to Dr. Holladay from 15 companies from 2016 to 2025. The largest total came from Otsuka America Pharmaceutical, Inc.
How long has Dr. Catherine Ann Holladay been practicing?
Dr. Holladay's NPI was assigned in 2005.
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