Dr. Alexander A. Keister, DO
- Medicare services, 2024
- 1,072
- Medicare patients, 2024
- 582
- Part D claims, 2024
- 273
- Publications
- 17
- Hospital affiliations
- 3
- 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. Keister'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. Alexander A. Keister is an emergency medicine physician in Sandusky, Ohio
Dr. Keister practices at Firelands Regional Medical Center in Sandusky, Ohio, part of Firelands Health.
Dr. Keister's NPI, 1689060386, was assigned on April 9, 2015. Dr. Keister graduated from Ohio University, College of Osteopathic Medicine in 2015. Dr. Keister holds Ohio license 34.012548.
- NPI
- 1689060386NPI Registry (opens in a new tab)
- Medicare PAC ID
- 5799088688
- NPI enumeration date
- April 9, 2015
- NPI status
- Active
- Accepts Medicare assignment
- Yes
- Practice phone
- (419) 557-7400
- Professional email
- Get email
- Personal email
- Get email
- Mobile number
- Get number
- Sex
- Male
- Estimated age
- 37
- Medical school graduation
- 2015
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; Dmand AI Affiliation Data; and Doctors and Clinicians National Downloadable File (CMS)
Dr. Alexander A. Keister practices at Firelands Regional Medical Center in Sandusky, Ohio
Dr. Keister'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. Alexander A. Keister is affiliated with 3 sites of care and 3 medical groups
Dr. Keister's primary practice is Firelands Regional Medical Center in Sandusky, Ohio, part of Firelands Health. Dr. Keister is also affiliated with Cleveland Clinic Main Campus. The medical group on file is Firelands Health. Dmand AI also links Dr. Keister to 1 more hospital and 2 medical groups, each named with a free account. Dr. Keister's employer is on file too: a hospital.
Sources: Dmand AI Affiliation Data; and Dmand AI Org Hierarchy Data
Dmand AI tracks the EHR system at Dr. Alexander A. Keister's practice
Dmand AI tracks the electronic health record (EHR) system at each site where Dr. Keister practices, 3 sites in all. Vendor and product names are available with a free account.
| Site | EHR vendor and product |
|---|---|
| Firelands Regional Medical Center | Available with a free account |
| +2 more sites and 2 medical groups | 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. Alexander A. Keister is one of 2,401 emergency medicine physicians in Ohio
Emergency medicine is Dr. Keister's primary specialty in the NPI Registry, under taxonomy code 207P00000X. Dr. Keister is licensed in Ohio.
Specialties and state licenses
- Emergency medicine, OhioPrimary
Emergency medicine physicians near Dr. Keister
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. Alexander A. Keister billed Medicare for 1,072 services in 2024
CMS data shows 1,072 Medicare services from Dr. Keister across 6 procedure codes in 2024, for 582 Medicare patients. Medicare paid $59,729 for them. Every service was in a facility, such as a hospital, rather than an office.
Dr. Keister's Medicare services by type, 2023 to 2024
- 2023
- 2024
- Office and hospital visits
- 2023: 5492024: 5323%
- Tests and treatments
- 2023: 6112024: 52215%
- Imaging
- 2023: 112024: 1864%
Dr. Keister compared with the Ohio median for emergency medicine physicians, 2024
- Dr. Keister
- Ohio median
- Medicare services
- 1,072vs 2664.0 times
- Medicare patients
- 582vs 2482.3 times
- Part D claims
- 175vs 652.7 times
Medians across 2,448 emergency medicine physicians in Ohio with Dmand AI profiles that report each measure.
Dr. Keister'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. Keister?
Medicare shows one payer. Book a meeting to get commercial claims data for Dr. Keister and other emergency medicine physicians in Ohio.
Sources: Medicare Physician & Other Practitioners - by Provider and Service (CMS), 2024 data; and Dmand AI Peer Benchmarks
Dr. Alexander A. Keister treated 582 Medicare patients in 2024, average age 75
CMS counts 582 Medicare patients who saw Dr. Keister in 2024. The largest group is 75 to 84, with 206 patients. 75% of them have high blood pressure, and 75% have high cholesterol. 21% are also on Medicaid. Their average risk score is 1.97, 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. Keister's median patient age at 53, with 54% women.
Dr. Keister's Medicare patients by age, 2024
Dr. Keister's Medicare patients by sex, 2024
- Women29551%
- Men28749%
Chronic conditions among Dr. Keister's Medicare patients, 2024
- High blood pressure75%
- High cholesterol75%
- Arthritis62%
- Diabetes40%
- Chronic kidney disease39%
- Ischemic heart disease38%
- Mood disorders38%
- Atrial fibrillation34%
Share of Medicare patients with each condition. A patient can have several.
Dr. Keister's patients across all payers
Dmand AI patient panel data covers Medicare, Medicaid and commercial patients.
Patient panel by age, all payers
Median age 53
Patient panel by sex, all payers
- Women54%
- Men44%
Sources: Dmand AI Patient Panel Data; and Medicare Physician & Other Practitioners - by Provider (CMS), 2024 data
Dr. Alexander A. Keister wrote 273 Medicare Part D claims in 2024
In 2024, Dr. Keister wrote 273 Medicare Part D claims for 196 patients. 93% of them were for generic drugs. CMS names the drug for 175 of them, across 8 drugs with 11 or more claims each, at $731 in total drug cost. In 2023, CMS named 157 claims across 8 drugs.
Dr. Keister's Part D claims by kind of drug, 2024
- Generic255 claims93%
- Brand-name18 claims7%
Dr. Keister'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. Keister's Part D claims, 2024
- Opioids16%43 of 273 claims
- Antibiotics36%98 of 273 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: 1572024: 17511%
Drugs named by CMS: 8 in 2024, 8 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. Alexander A. Keister takes part in Medicare
Dr. Keister accepts Medicare assignment, so Medicare's approved amount is taken as full payment.
- Accepts Medicare assignment
- Yes
Removal of nail tissue: 1 to 10 procedures (CMS shows small counts as a range)
Sources: Doctors and Clinicians National Downloadable File (CMS); and Doctors and Clinicians Utilization Data (CMS)
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Dr. Alexander A. Keister has 17 publications on record
Dmand AI links 17 papers to Dr. Keister, published from 2021 to 2025. 2024 was the busiest year, with 6. The most frequent topics are Spinal Fusion, Lordosis and Lumbar Vertebrae. Dr. Keister has published most often in Clin Neurol Neurosurg. Dr. Keister's most frequent co-authors are Andrew James Grossbach, MD, Stephanus Van Wyk Viljoen, MD and Joshua H. Weinberg, MD.
Dr. Keister's papers by year, 2021 to 2025
Topics Dr. Keister writes about most
- Spinal Fusion
- Lordosis
- Lumbar Vertebrae
- Postoperative Complications
- Neurosurgical Procedures
- Pilot Projects
- Thoracic Vertebrae
Dr. Keister's most frequent co-authors
- Andrew James Grossbach, MD12 shared papers
- Stephanus Van Wyk Viljoen, MD11 shared papers
- Joshua H. Weinberg, MD3 shared papers
Recent publications by Dr. Keister
Spine (Phila Pa 1976)
Clin Neurol Neurosurg
Microbial etiology of vertebral osteomyelitis/discitis amid the opioid epidemic (opens in a new tab)
J Neurosurg Spine
See who Dr. Keister researches with
Physician Network Discovery turns co-authorship, shared hospitals and shared groups into a map of who Dr. Keister works with, so you can find a warm path to the right emergency medicine physicians.
Sources: PubMed (National Library of Medicine); and Dmand AI Research Linkage
Dr. Alexander A. Keister received $100 in industry payments from 2021 to 2024
CMS Open Payments shows 7 general payments to Dr. Keister from 2 drug and device companies from 2021 to 2024. Food and beverage make up the largest share, 100% of the total. Abbvie Inc. paid the most, $79.
General payments to Dr. Keister by program year, 2021 to 2024
Companies that paid Dr. Keister the most, 2021 to 2024
Share is of all general payments to this clinician.
Source: Open Payments (CMS), 2025 data, released July 7, 2026
Dr. Alexander A. Keister graduated from Ohio University, College of Osteopathic Medicine
Dr. Keister graduated from Ohio University, College of Osteopathic Medicine in 2015.
- Medical school
Source: Dmand AI Professional Profile Data
Sources for Dr. Alexander A. Keister'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 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)Doctors and Clinicians Utilization Data (CMS) (opens in a new tab) |
| Publications, topics and co-authors | PubMed (National Library of Medicine) (opens in a new tab)Dmand AI Research Linkage |
| 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. Alexander A. Keister
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. Alexander A. Keister's NPI number?
Dr. Alexander A. Keister's NPI number is 1689060386. It was assigned on April 9, 2015, and it is active in the NPI Registry.
What kind of doctor is Dr. Alexander A. Keister?
Dr. Alexander A. Keister is an emergency medicine physician in Sandusky, Ohio. The primary specialty in the NPI Registry is Emergency Medicine Physician (taxonomy code 207P00000X).
Where does Dr. Alexander A. Keister practice?
Dr. Keister practices at 1111 Hayes Avenue, Sandusky, OH 44870. Dr. Keister's primary practice is Firelands Regional Medical Center in Sandusky, Ohio, part of Firelands Health. Dmand AI also links Dr. Keister to 1 hospital and 2 medical groups.
What is Dr. Alexander A. Keister's office phone number?
The practice phone on file for Dr. Keister is (419) 557-7400.
What is Dr. Alexander A. Keister's medical license number?
Dr. Keister holds Ohio license 34.012548.
Which hospitals is Dr. Alexander A. Keister affiliated with?
Dr. Keister practices at Firelands Regional Medical Center in Sandusky, Ohio. Dr. Keister is also affiliated with Cleveland Clinic Main Campus. Dmand AI links Dr. Keister to 1 more hospital.
What medical group is Dr. Alexander A. Keister part of?
Dr. Keister is linked to Firelands Health. Dmand AI links Dr. Keister to 2 more medical groups.
Does Dr. Alexander A. Keister accept Medicare?
Yes. CMS data shows Dr. Keister billed Medicare for 1,072 services in 2024, and Dr. Keister accepts Medicare assignment.
How many Medicare patients does Dr. Alexander A. Keister see?
CMS counts 582 Medicare patients who saw Dr. Keister in 2024, with an average age of 75.
What services does Dr. Alexander A. Keister bill to Medicare?
In 2024, Dr. Keister's most billed Medicare services were heart test or procedure (93010), emergency department visit (99285) and emergency department visit (99284).
Show 6 more questionsShow fewer questions
Where did Dr. Alexander A. Keister go to medical school?
Dr. Keister graduated from Ohio University, College of Osteopathic Medicine in 2015.
What drugs does Dr. Alexander A. Keister prescribe most?
In 2024 Medicare Part D data, Dr. Keister's most prescribed drugs by claims were Ondansetron ODT, Cephalexin and Oxycodone-Acetaminophen.
Has Dr. Alexander A. Keister received payments from drug or device companies?
CMS Open Payments shows $100 in general payments to Dr. Keister from 2 companies from 2021 to 2024. The largest total came from Abbvie Inc.
How long has Dr. Alexander A. Keister been practicing?
Dr. Keister graduated from medical school in 2015, 11 years ago.
Does Dr. Alexander A. Keister do research?
Dmand AI links 17 publications to Dr. Keister, published from 2021 to 2025.
Who does Dr. Alexander A. Keister publish with?
Dr. Keister's most frequent co-authors are Andrew James Grossbach, MD (12 shared papers), Stephanus Van Wyk Viljoen, MD (11 shared papers) and Joshua H. Weinberg, MD (3 shared papers).
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