Radiation Therapy Regimens in Treating Patients With Limited-Stage Small Cell Lung Cancer Receiving Cisplatin and Etoposide (opens in a new tab)
Status unknownPhase 3
Lung NeoplasmsThoracic NeoplasmsCisplatinEtoposideCarboplatin
Dr. Douglas R. Keyser, MD
NPI1902831688PAC ID0345439568
- Medicare services, 2024
- 3,465
- Medicare patients, 2024
- 259
- Part D claims, 2024
- 145
- Clinical trials
- 1
- Hospital affiliations
- 4
- Practice address
- 401 Matthew Street, Marietta, OH 45750
- Practice phone
- Call (740) 374-1400
- Professional email
- Get professional email
- Personal email
- Get personal email
- Mobile number
- Get mobile number
Primary practice
Find Dr. Keyser'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. Douglas R. Keyser is a radiation oncologist in Marietta, Ohio
Dr. Keyser practices at Marietta Memorial Hospital in Marietta, Ohio, part of Memorial Health System.
Dr. Keyser's NPI, 1902831688, was assigned on July 11, 2006. Dr. Keyser graduated from Northeastern Ohio University College of Medicine in 1990. Dr. Keyser holds Ohio license 35 063249.
NPI and contact details
- NPI
- 1902831688NPI Registry (opens in a new tab)
- Medicare PAC ID
- 0345439568
- NPI enumeration date
- July 11, 2006
- NPI status
- Active
- Accepts Medicare assignment
- Yes
- Practice phone
- (740) 374-1400
- Professional email
- Get email
- Personal email
- Get email
- Mobile number
- Get number
- Sex
- Male
- Estimated age
- 62
- Medical school graduation
- 1990
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; Dmand AI Affiliation Data; and Doctors and Clinicians National Downloadable File (CMS)
Dr. Douglas R. Keyser practices at Marietta Memorial Hospital in Marietta, Ohio
Dr. Keyser's primary practice is Marietta Memorial Hospital, at 401 Matthew Street, Marietta, OH 45750 in Washington County. The practice phone is (740) 374-1400.
- Marietta Memorial Hospital401 Matthew Street, Marietta, OH 45750 · Washington CountyPhone(740) 374-1400
Source: Dmand AI Affiliation Data
Dr. Douglas R. Keyser is affiliated with 4 sites of care and 5 medical groups
Dr. Keyser's primary practice is Marietta Memorial Hospital in Marietta, Ohio, part of Memorial Health System. Dr. Keyser is also affiliated with Selby General Hospital. The medical group on file is Marietta Memorial Hospital. Dmand AI also links Dr. Keyser to 2 more hospitals and 4 medical groups, each named with a free account. Dr. Keyser's employer is on file too: a hospital.
Selby General HospitalMarietta Memorial Hospital2 hospitalsNames with a free account4 medical groupsNames with a free accountEmployer: hospitalName with a free account
See all 9 affiliations for Dr. KeyserSources: Dmand AI Affiliation Data; and Dmand AI Org Hierarchy Data
Dmand AI tracks the EHR system at Dr. Douglas R. Keyser's practice
Dmand AI tracks the electronic health record (EHR) system at each site where Dr. Keyser practices, 4 sites in all. Vendor and product names are available with a free account.
| Site | EHR vendor and product |
|---|---|
| Marietta Memorial Hospital | Available with a free account |
| +3 more sites and 4 medical groups | Available with a free account |
Source: Dmand AI Technology Install Data
For health IT teams
See the EHR and IT leaders at every hospital where Dr. Keyser practices
Dmand AI maps EHR vendors, IT decision makers and buying committees across Memorial Health System and 6.2K+ hospitals, with verified contacts in the same login.
Dr. Douglas R. Keyser is one of 267 radiation oncologists in Ohio
Radiation oncology is Dr. Keyser's primary specialty in the NPI Registry, under taxonomy code 2085R0001X. Dr. Keyser is licensed in Ohio.
Specialties and state licenses
- Radiation oncology, OhioPrimary
Radiation oncologists near Dr. Keyser
Counts of radiation oncologists with a Dmand AI profile, by place and practice. Each opens the list.
267radiation oncologists in Ohio
2radiation oncologists in Marietta
2radiation oncologists at Marietta Memorial HospitalSources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; and Dmand AI Peer Benchmarks
Dr. Douglas R. Keyser billed Medicare for 3,465 services in 2024
CMS data shows 3,465 Medicare services from Dr. Keyser across 19 procedure codes in 2024, for 259 Medicare patients. Medicare paid $254,345 for them.
Medicare services, 20243,465
Medicare patients259
Paid by Medicare$254,345
Procedure codes19
Dr. Keyser's Medicare services by type, 2023 to 2024
- 2023
- 2024
- Imaging
- 2023: 2,7062024: 3,22819%
- Office and hospital visits
- 2023: 1342024: 23777%
- Other services
- 2023: 2982024: 0100%
Where Dr. Keyser's Medicare services took place, 2024
- In an office1765%
- In a facility3,28995%
Dr. Keyser compared with the Ohio median for radiation oncologists, 2024
- Dr. Keyser
- Ohio median
- Medicare services
- 3,465vs 1,1203.1 times
- Medicare patients
- 259vs 15765% above
- Part D claims
- 81vs 312.6 times
Medians across 262 radiation oncologists in Ohio with Dmand AI profiles that report each measure.
Dr. Keyser'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. Keyser?
Medicare shows one payer. Book a meeting to get commercial claims data for Dr. Keyser and other radiation oncologists in Ohio.
Sources: Medicare Physician & Other Practitioners - by Provider and Service (CMS), 2024 data; and Dmand AI Peer Benchmarks
Dr. Douglas R. Keyser treated 259 Medicare patients in 2024, average age 73
CMS counts 259 Medicare patients who saw Dr. Keyser in 2024. The largest group is 65 to 74, with 137 patients. 75% of them have cancer, and 75% have high blood pressure. 17% are also on Medicaid. Their average risk score is 2.07, 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. Keyser's median patient age at 74, with 52% women.
Medicare patients, 2024259
Average age73
Average risk score2.07
Also on Medicaid17%
Dr. Keyser's Medicare patients by age, 2024
Dr. Keyser's Medicare patients by sex, 2024
- Women14355%
- Men11645%
Chronic conditions among Dr. Keyser's Medicare patients, 2024
- Cancer75%
- High blood pressure75%
- High cholesterol75%
- Arthritis51%
- Diabetes39%
- Anxiety38%
- COPD37%
- Ischemic heart disease37%
Share of Medicare patients with each condition. A patient can have several.
Dr. Keyser's patients across all payers
Dmand AI patient panel data covers Medicare, Medicaid and commercial patients.
Patient panel by age, all payers
Median age 74
Patient panel by sex, all payers
- Women52%
- Men48%
Sources: Dmand AI Patient Panel Data; and Medicare Physician & Other Practitioners - by Provider (CMS), 2024 data
Dr. Douglas R. Keyser wrote 145 Medicare Part D claims in 2024
In 2024, Dr. Keyser wrote 145 Medicare Part D claims for 73 patients. 99% of them were for generic drugs. CMS names the drug for 81 of them, across 4 drugs with 11 or more claims each, at $804 in total drug cost. In 2023, CMS named 30 claims across 2 drugs.
Part D claims, 2024145
Drugs named by CMS4
Total drug cost$804
Part D patients73
Dr. Keyser's Part D claims by kind of drug, 2024
- Generic144 claims99%
- Brand-name and other1 claims1%
Dr. Keyser'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. Keyser's Part D claims, 2024
- Opioids30%43 of 145 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: 302024: 81170%
Drugs named by CMS: 4 in 2024, 2 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. Douglas R. Keyser takes part in Medicare
Dr. Keyser 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)
For MedTech and pharma teams
Find radiation oncologists like Dr. Keyser by procedure volume and prescribing
Filter 7.4M+ HCPs by Medicare procedures, Part D drugs and Open Payments history, then reach them with verified contacts in one login.
Dr. Douglas R. Keyser has worked on 1 clinical trial
Dmand AI links Dr. Keyser to 1 clinical trial. Conditions studied include Lung Neoplasms and Thoracic Neoplasms.
Conditions in Dr. Keyser's trials
- Lung Neoplasms
- Thoracic Neoplasms
Investigators on the most trials with Dr. Keyser
- Aaron M. Allen, MD1 shared trial
- Rafat H. Ansari, MD1 shared trial
- Mark Emerson Augspurger, MD1 shared trial
Recent clinical trials with Dr. Keyser
Sources: ClinicalTrials.gov (National Library of Medicine); and Dmand AI Research Linkage
Dr. Douglas R. Keyser received $989 in industry payments from 2017 to 2024
CMS Open Payments shows 51 general payments to Dr. Keyser from 18 drug and device companies from 2017 to 2024. Food and beverage make up the largest share, 100% of the total. Pharmacyclics LLC, An AbbVie Company paid the most, $141.
General payments to Dr. Keyser by program year, 2017 to 2024
Companies that paid Dr. Keyser the most, 2017 to 2024
Share is of all general payments to this clinician.
Source: Open Payments (CMS), 2025 data, released July 7, 2026
Dr. Douglas R. Keyser graduated from Northeastern Ohio University College of Medicine
Dr. Keyser graduated from Northeastern Ohio University College of Medicine in 1990.
- Medical school
Source: Dmand AI Professional Profile Data
Sources for Dr. Douglas R. Keyser'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) |
| Clinical trials and co-investigators | ClinicalTrials.gov (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. Douglas R. Keyser
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. Douglas R. Keyser's NPI number?
Dr. Douglas R. Keyser's NPI number is 1902831688. It was assigned on July 11, 2006, and it is active in the NPI Registry.
What kind of doctor is Dr. Douglas R. Keyser?
Dr. Douglas R. Keyser is a radiation oncologist in Marietta, Ohio. The primary specialty in the NPI Registry is Radiation Oncology Physician (taxonomy code 2085R0001X).
Where does Dr. Douglas R. Keyser practice?
Dr. Keyser practices at 401 Matthew Street, Marietta, OH 45750. Dr. Keyser's primary practice is Marietta Memorial Hospital in Marietta, Ohio, part of Memorial Health System. Dmand AI also links Dr. Keyser to 2 hospitals and 4 medical groups.
What is Dr. Douglas R. Keyser's office phone number?
The practice phone on file for Dr. Keyser is (740) 374-1400.
What is Dr. Douglas R. Keyser's medical license number?
Dr. Keyser holds Ohio license 35 063249.
Which hospitals is Dr. Douglas R. Keyser affiliated with?
Dr. Keyser practices at Marietta Memorial Hospital in Marietta, Ohio. Dr. Keyser is also affiliated with Selby General Hospital. Dmand AI links Dr. Keyser to 2 more hospitals.
What medical group is Dr. Douglas R. Keyser part of?
Dr. Keyser is linked to Marietta Memorial Hospital. Dmand AI links Dr. Keyser to 4 more medical groups.
Does Dr. Douglas R. Keyser accept Medicare?
Yes. CMS data shows Dr. Keyser billed Medicare for 3,465 services in 2024, and Dr. Keyser accepts Medicare assignment.
How many Medicare patients does Dr. Douglas R. Keyser see?
CMS counts 259 Medicare patients who saw Dr. Keyser in 2024, with an average age of 73.
What services does Dr. Douglas R. Keyser bill to Medicare?
In 2024, Dr. Keyser's most billed Medicare services were radiation oncology (77014), radiation oncology (77300) and radiation oncology (77427).
Show 5 more questionsShow fewer questions
Where did Dr. Douglas R. Keyser go to medical school?
Dr. Keyser graduated from Northeastern Ohio University College of Medicine in 1990.
What drugs does Dr. Douglas R. Keyser prescribe most?
In 2024 Medicare Part D data, Dr. Keyser's most prescribed drugs by claims were Tamsulosin HCl, Oxycodone-Acetaminophen and Dexamethasone.
Has Dr. Douglas R. Keyser received payments from drug or device companies?
CMS Open Payments shows $989 in general payments to Dr. Keyser from 18 companies from 2017 to 2024. The largest total came from Pharmacyclics LLC, An AbbVie Company.
How long has Dr. Douglas R. Keyser been practicing?
Dr. Keyser graduated from medical school in 1990, 36 years ago.
Does Dr. Douglas R. Keyser do research?
Dr. Keyser has worked on 1 clinical trial.
Selling to radiation oncology practices?
See radiation oncologists in Ohio by site of care and group
Find the practices, groups and hospitals they work with, and the right people to contact at each.
- 30 days free
- Self-serve
- No credit card