Ado-Trastuzumab EmtansineAntineoplastic Combined Chemotherapy ProtocolsBreast Neoplasms
Dr. Douglas J. Weckstein, MD
NPI1710971684
- Medicare services, 2024
- 578
- Medicare patients, 2024
- 244
- Part D claims, 2024
- 185
- Publications
- 16
- Clinical trials
- 10
- Practice address
- 1000 Fourth Street SW, Mason City, IA 50401
- Practice phone
- Call (641) 428-7000
- Professional email
- Get professional email
- Personal email
- Get personal email
- Mobile number
- Get mobile number
Primary practice
Find Dr. Weckstein's professional email, personal email and mobile number
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Dr. Douglas J. Weckstein is a hematologist and oncologist in Mason City, Iowa
Dr. Weckstein practices at MercyOne North Iowa Medical Center in Mason City, Iowa, part of Trinity Health.
Dr. Weckstein's NPI, 1710971684, was assigned on September 7, 2005. Dr. Weckstein graduated from Virginia Commonwealth University, School of Medicine in 1986. Dr. Weckstein holds New Hampshire license 10352.
NPI and contact details
- NPI
- 1710971684NPI Registry (opens in a new tab)
- NPI enumeration date
- September 7, 2005
- NPI status
- Active
- Practice phone
- (641) 428-7000
- Professional email
- Get email
- Personal email
- Get email
- Mobile number
- Get number
- Sex
- Male
- Estimated age
- 66
- Medical school graduation
- 1986
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; and Dmand AI Affiliation Data
Dr. Douglas J. Weckstein practices at MercyOne North Iowa Medical Center in Mason City, Iowa
Dr. Weckstein's primary practice is MercyOne North Iowa Medical Center, at 1000 Fourth Street SW, Mason City, IA 50401 in Cerro Gordo County. The practice phone is (641) 428-7000.
- MercyOne North Iowa Medical Center1000 Fourth Street SW, Mason City, IA 50401 · Cerro Gordo CountyPhone(641) 428-7000
Source: Dmand AI Affiliation Data
Dr. Douglas J. Weckstein is affiliated with 4 sites of care and 1 medical group
Dr. Weckstein's primary practice is MercyOne North Iowa Medical Center in Mason City, Iowa, part of Trinity Health. Dr. Weckstein is also affiliated with Concord Hospital. The medical group on file is Elliot Pediatric Rehabilitation Services. Dmand AI also links Dr. Weckstein to 1 more hospital and 1 hospice, each named with a free account.
Concord HospitalElliot Pediatric Rehabilitation Services1 hospitalName with a free account1 hospiceName with a free account
See all 5 affiliations for Dr. WecksteinSources: Dmand AI Affiliation Data; and Dmand AI Org Hierarchy Data
Dmand AI tracks the EHR system at Dr. Douglas J. Weckstein's practice
Dmand AI tracks the electronic health record (EHR) system at each site where Dr. Weckstein practices, 4 sites in all. Vendor and product names are available with a free account.
| Site | EHR vendor and product |
|---|---|
| MercyOne North Iowa Medical Center | Available with a free account |
| +3 more affiliated sites | Available with a free account |
Source: Dmand AI Technology Install Data
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Dr. Douglas J. Weckstein is one of 77 hematologists and oncologists in Iowa
Hematology and oncology is Dr. Weckstein's primary specialty in the NPI Registry, under taxonomy code 207RH0003X. Dr. Weckstein is licensed in New Hampshire.
Specialties and state licenses
- Hematology and oncology, New HampshirePrimary
Hematologists and oncologists near Dr. Weckstein
Counts of hematologists and oncologists with a Dmand AI profile, by place and practice. Each opens the list.
77hematologists and oncologists in Iowa
4hematologists and oncologists in Mason City
4hematologists and oncologists at MercyOne North Iowa Medical CenterSources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; and Dmand AI Peer Benchmarks
Dr. Douglas J. Weckstein billed Medicare for 578 services in 2024
CMS data shows 578 Medicare services from Dr. Weckstein across 6 procedure codes in 2024, for 244 Medicare patients. Medicare paid $36,662 for them.
Medicare services, 2024578
Medicare patients244
Paid by Medicare$36,662
Procedure codes6
Dr. Weckstein's Medicare services by type, 2023 to 2024
- 2023
- 2024
- Office and hospital visits
- 2023: 6352024: 5789%
Where Dr. Weckstein's Medicare services took place, 2024
- In an office356%
- In a facility54394%
Dr. Weckstein compared with the Iowa median for hematologists and oncologists, 2024
- Dr. Weckstein
- Iowa median
- Medicare services
- 578vs 75924% below
- Medicare patients
- 244vs 2627% below
- Part D claims
- 63vs 25475% below
Medians across 78 hematologists and oncologists in Iowa with Dmand AI profiles that report each measure.
Dr. Weckstein'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.
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Sources: Medicare Physician & Other Practitioners - by Provider and Service (CMS), 2024 data; and Dmand AI Peer Benchmarks
Dr. Douglas J. Weckstein treated 244 Medicare patients in 2024, average age 73
CMS counts 244 Medicare patients who saw Dr. Weckstein in 2024. The largest group is 65 to 74, with 126 patients. 69% of them have high cholesterol, and 64% have cancer. 9% are also on Medicaid. Their average risk score is 2.06, 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. Weckstein's median patient age at 69, with 55% women.
Medicare patients, 2024244
Average age73
Average risk score2.06
Also on Medicaid9%
Dr. Weckstein's Medicare patients by age, 2024
Dr. Weckstein's Medicare patients by sex, 2024
- Women11848%
- Men12652%
Chronic conditions among Dr. Weckstein's Medicare patients, 2024
- High cholesterol69%
- Cancer64%
- High blood pressure64%
- Arthritis42%
- Anxiety29%
- Mood disorders28%
- Depression24%
- Diabetes23%
Share of Medicare patients with each condition. A patient can have several.
Dr. Weckstein's patients across all payers
Dmand AI patient panel data covers Medicare, Medicaid and commercial patients.
Patient panel by age, all payers
Median age 69
Patient panel by sex, all payers
- Women55%
- Men44%
Sources: Dmand AI Patient Panel Data; and Medicare Physician & Other Practitioners - by Provider (CMS), 2024 data
Dr. Douglas J. Weckstein wrote 185 Medicare Part D claims in 2024
In 2024, Dr. Weckstein wrote 185 Medicare Part D claims for 61 patients. 81% of them were for generic drugs. CMS names the drug for 63 of them, across 4 drugs with 11 or more claims each, at $9,410 in total drug cost. In 2023, CMS named 158 claims across 8 drugs.
Part D claims, 2024185
Drugs named by CMS4
Total drug cost$9,410
Part D patients61
Dr. Weckstein's Part D claims by kind of drug, 2024
- Generic149 claims81%
- Brand-name36 claims19%
Dr. Weckstein'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.
Part D claims for drugs CMS names, 2023 to 2024
- 2023
- 2024
- Claims for drugs CMS names
- 2023: 1582024: 6360%
Drugs named by CMS: 4 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
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Dr. Douglas J. Weckstein has 16 publications on record
Dmand AI links 16 papers to Dr. Weckstein, published from 2011 to 2024. 2015 was the busiest year, with 2. The most frequent topics are Antineoplastic Combined Chemotherapy Protocols, Breast Neoplasms and Trastuzumab. Dr. Weckstein has published most often in J Clin Oncol. Dr. Weckstein's most frequent co-authors are Dan S. Zuckerman, MD, Meredith Faggen, MD and Steven Jay Isakoff, MD, PhD.
Papers16
Years published2011 to 2024
Dr. Weckstein's papers by year, 2011 to 2024
Topics Dr. Weckstein writes about most
- Antineoplastic Combined Chemotherapy Protocols
- Breast Neoplasms
- Trastuzumab
- Colorectal Neoplasms
- Paclitaxel
- Receptor, ErbB-2
- Ado-Trastuzumab Emtansine
- Bevacizumab
Dr. Weckstein's most frequent co-authors
- Dan S. Zuckerman, MD6 shared papers
- Meredith Faggen, MD5 shared papers
- Steven Jay Isakoff, MD, PhD5 shared papers
Recent publications by Dr. Weckstein
Abiraterone AcetateAndrogen AntagonistsAndrogens
Breast Cancer Res Treat
Ado-Trastuzumab EmtansineAmenorrheaAntineoplastic Combined Chemotherapy Protocols
Antineoplastic Agents, ImmunologicalAntineoplastic Combined Chemotherapy ProtocolsBreast Neoplasms
See who Dr. Weckstein researches with
Physician Network Discovery turns co-authorship, shared hospitals and shared groups into a map of who Dr. Weckstein works with, so you can find a warm path to the right hematologists and oncologists.
Sources: PubMed (National Library of Medicine); and Dmand AI Research Linkage
Dr. Douglas J. Weckstein has worked on 10 clinical trials
Dmand AI links Dr. Weckstein to 10 clinical trials, 6 of them phase 3 studies. 10 are still active or recruiting. Conditions studied include Carcinoma, Non-Small-Cell Lung, Carcinoma, Bronchogenic and Anal Canal Carcinoma. National Cancer Institute (NCI) sponsors the most, 10.
Clinical trials with Dr. Weckstein by phase
- NonePhase 1: no trials
- 3Phase 2: 3 trials
- 6Phase 3: 6 trials
- NonePhase 4: no trials
Conditions in Dr. Weckstein's trials
- Carcinoma, Non-Small-Cell Lung
- Carcinoma, Bronchogenic
- Anal Canal Carcinoma
- Breast Carcinoma In Situ
- Leukemia, Lymphocytic, Chronic, B-Cell
Investigators on the most trials with Dr. Weckstein
- Charles Samuel Kuzma, MD8 shared trials
- Donald Frank Busiek, MD6 shared trials
- Christopher Haekang Chay, MD6 shared trials
Recent clinical trials with Dr. Weckstein
A Randomized Phase III Study of Immune Checkpoint Inhibition With Chemotherapy in Treatment-Naive Metastatic Anal Cancer Patients (opens in a new tab)
Active, not recruitingPhase 3
Anal Canal CarcinomaAnus NeoplasmsCarboplatinNivolumabPaclitaxel
Testing the Addition of the Pill Chemotherapy, Cabozantinib, to the Standard Immune Therapy Nivolumab Compared to Standard Chemotherapy for Non-small Cell Lung Cancer (opens in a new tab)
Active, not recruitingPhase 2
Lung NeoplasmsThoracic NeoplasmsNivolumabCabozantinib S-malateDocetaxel
Immunotherapy With Nivolumab and Ipilimumab Followed by Nivolumab or Nivolumab With Cabozantinib for Patients With Advanced Kidney Cancer, The PDIGREE Study (opens in a new tab)
Active, not recruitingPhase 3
Lymphatic MetastasisCarcinoma, Renal CellCabozantinibIpilimumabNivolumab
Assessing the Ability of Combination Treatment With Venetoclax to Permit Time Limited Therapy in Chronic Lymphocytic Leukemia (opens in a new tab)
Active, not recruitingPhase 3
Leukemia, Lymphocytic, Chronic, B-CellLeukemia, B-CellVenetoclaxIbrutinibObinutuzumab
Testing MK-3475 (Pembrolizumab) as Adjuvant Therapy for Triple Receptor-Negative Breast Cancer (opens in a new tab)
Active, not recruitingPhase 3
Breast Carcinoma In SituCarcinoma in SituPembrolizumabRadiation Therapy
Sources: Dmand AI Research Linkage; and ClinicalTrials.gov (National Library of Medicine)
Dr. Douglas J. Weckstein received $188 in industry payments from 2016 to 2022
CMS Open Payments shows 14 general payments to Dr. Weckstein from 8 drug and device companies from 2016 to 2022. Education make up the largest share, 67% of the total. Pfizer Inc. paid the most, $65.
General payments to Dr. Weckstein by program year, 2016 to 2022
General payments to Dr. Weckstein by kind, 2016 to 2022
$188in total
- Education$12667%
- Food and beverage$6133%
Companies that paid Dr. Weckstein the most, 2016 to 2022
Share is of all general payments to this clinician.
Source: Open Payments (CMS), 2025 data, released July 7, 2026
Dr. Douglas J. Weckstein graduated from Virginia Commonwealth University, School of Medicine
Dr. Weckstein graduated from Virginia Commonwealth University, School of Medicine in 1986.
- Medical school
Source: Dmand AI Professional Profile Data
Sources for Dr. Douglas J. Weckstein'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) |
| Publications, topics and co-authors | PubMed (National Library of Medicine) (opens in a new tab)Dmand AI Research Linkage |
| Clinical trials and co-investigators | Dmand AI Research LinkageClinicalTrials.gov (National Library of Medicine) (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 |
| 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 J. Weckstein
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 J. Weckstein's NPI number?
Dr. Douglas J. Weckstein's NPI number is 1710971684. It was assigned on September 7, 2005, and it is active in the NPI Registry.
What kind of doctor is Dr. Douglas J. Weckstein?
Dr. Douglas J. Weckstein is a hematologist and oncologist in Mason City, Iowa. The primary specialty in the NPI Registry is Hematology & Oncology Physician (taxonomy code 207RH0003X).
Where does Dr. Douglas J. Weckstein practice?
Dr. Weckstein practices at 1000 Fourth Street SW, Mason City, IA 50401. Dr. Weckstein's primary practice is MercyOne North Iowa Medical Center in Mason City, Iowa, part of Trinity Health. Dmand AI also links Dr. Weckstein to 1 hospital and 1 hospice.
What is Dr. Douglas J. Weckstein's office phone number?
The practice phone on file for Dr. Weckstein is (641) 428-7000.
What is Dr. Douglas J. Weckstein's medical license number?
Dr. Weckstein holds New Hampshire license 10352.
Which hospitals is Dr. Douglas J. Weckstein affiliated with?
Dr. Weckstein practices at MercyOne North Iowa Medical Center in Mason City, Iowa. Dr. Weckstein is also affiliated with Concord Hospital. Dmand AI links Dr. Weckstein to 1 more hospital.
What medical group is Dr. Douglas J. Weckstein part of?
Dr. Weckstein is linked to Elliot Pediatric Rehabilitation Services.
Does Dr. Douglas J. Weckstein accept Medicare?
Yes. CMS data shows Dr. Weckstein billed Medicare for 578 services in 2024.
How many Medicare patients does Dr. Douglas J. Weckstein see?
CMS counts 244 Medicare patients who saw Dr. Weckstein in 2024, with an average age of 73.
What services does Dr. Douglas J. Weckstein bill to Medicare?
In 2024, Dr. Weckstein's most billed Medicare services were office visit, established patient (99214), office visit, established patient (99213) and hospital inpatient care (99232).
Show 6 more questionsShow fewer questions
Where did Dr. Douglas J. Weckstein go to medical school?
Dr. Weckstein graduated from Virginia Commonwealth University, School of Medicine in 1986.
What drugs does Dr. Douglas J. Weckstein prescribe most?
In 2024 Medicare Part D data, Dr. Weckstein's most prescribed drugs by claims were Anastrozole, Prednisone and Tamoxifen Citrate.
Has Dr. Douglas J. Weckstein received payments from drug or device companies?
CMS Open Payments shows $188 in general payments to Dr. Weckstein from 8 companies from 2016 to 2022. The largest total came from Pfizer Inc.
How long has Dr. Douglas J. Weckstein been practicing?
Dr. Weckstein graduated from medical school in 1986, 40 years ago.
Does Dr. Douglas J. Weckstein do research?
Dmand AI links 16 publications to Dr. Weckstein, published from 2011 to 2024. Dr. Weckstein has worked on 10 clinical trials.
Who does Dr. Douglas J. Weckstein publish with?
Dr. Weckstein's most frequent co-authors are Dan S. Zuckerman, MD (6 shared papers), Meredith Faggen, MD (5 shared papers) and Steven Jay Isakoff, MD, PhD (5 shared papers).
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