Dr. Thomas W. Flaig, MD

  • Aurora, CO
  • Hematologist and oncologist
NPI1881620326PAC ID3375546450
Medicare services, 2024
313
Medicare patients, 2024
86
Part D claims, 2024
219
Publications
162
Clinical trials
9
Practice address
12605 E 16th Ave, Aurora, CO 80045
Practice phone
Call (720) 848-0000
Professional email
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Personal email
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Mobile number
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Social profiles

Primary practice

UCHealth University of Colorado Hospital

Hospital · Aurora, Colorado

See all 6 affiliations

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Dr. Thomas W. Flaig is a hematologist and oncologist in Aurora, Colorado

Dr. Flaig practices at UCHealth University of Colorado Hospital in Aurora, Colorado, part of UCHealth.

Dr. Flaig's NPI, 1881620326, was assigned on June 25, 2006. Dr. Flaig graduated from University Of Minnesota Medical School in 1999. Dr. Flaig holds Colorado license 44457.

NPI and contact details
Medicare PAC ID
3375546450
NPI enumeration date
June 25, 2006
NPI status
Active
Accepts Medicare assignment
Yes
Offers telehealth
Yes
Practice phone
(720) 848-0000
Professional email
Get email
Personal email
Get email
Mobile number
Get number
Sex
Male
Estimated age
53
Medical school graduation
1999

Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; Dmand AI Affiliation Data; and Doctors and Clinicians National Downloadable File (CMS)

Dr. Thomas W. Flaig practices at UCHealth University of Colorado Hospital in Aurora, Colorado

Dr. Flaig's primary practice is UCHealth University of Colorado Hospital, at 12605 E 16th Ave, Aurora, CO 80045 in Adams County. The practice phone is (720) 848-0000.

Source: Dmand AI Affiliation Data

Dr. Thomas W. Flaig is affiliated with 5 sites of care and 1 medical group

Dr. Flaig's primary practice is UCHealth University of Colorado Hospital in Aurora, Colorado, part of UCHealth. Dr. Flaig is also affiliated with UCHealth Medical Center of the Rockies. The medical group on file is University of Colorado Medicine (CU Medicine). Dmand AI also links Dr. Flaig to 3 more hospitals, each named with a free account.

See all 6 affiliations for Dr. Flaig

Sources: Dmand AI Affiliation Data; and Dmand AI Org Hierarchy Data

Dmand AI tracks the EHR system at Dr. Thomas W. Flaig's practice

Dmand AI tracks the electronic health record (EHR) system at each site where Dr. Flaig practices, 5 sites in all. Vendor and product names are available with a free account.

EHR by site
SiteEHR vendor and product
UCHealth University of Colorado HospitalAvailable with a free account
+4 more affiliated sitesAvailable with a free account

Source: Dmand AI Technology Install Data

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Dr. Thomas W. Flaig is one of 179 hematologists and oncologists in Colorado

Hematology and oncology is Dr. Flaig's primary specialty in the NPI Registry, under taxonomy code 207RH0003X. Dr. Flaig is board certified in medical oncology by the American Board of Internal Medicine. Dr. Flaig is licensed in Colorado.

Specialties and state licenses

  • Hematology and oncology, ColoradoPrimaryLicense 44457 · 2006 to 2027 · taxonomy 207RH0003X

Clinical focus

Dmand AI lists chronic anemia and prostate cancer among the conditions Dr. Flaig treats.

Hematologists and oncologists near Dr. Flaig

Counts of hematologists and oncologists 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. Thomas W. Flaig billed Medicare for 313 services in 2024

CMS data shows 313 Medicare services from Dr. Flaig across 4 procedure codes in 2024, for 86 Medicare patients. Medicare paid $21,149 for them.

Medicare services, 2024313
Medicare patients86
Paid by Medicare$21,149
Procedure codes4

Dr. Flaig's Medicare services by type, 2023 to 2024

  • 2023
  • 2024
Office and hospital visits
2023: 1932024: 22316%
Other services
2023: 02024: 90

Where Dr. Flaig's Medicare services took place, 2024

  • In an office114%
  • In a facility30296%

Dr. Flaig compared with the Colorado median for hematologists and oncologists, 2024

  • Dr. Flaig
  • Colorado median
Medicare services
313vs 62450% below
Medicare patients
86vs 24264% below
Part D claims
162vs 50368% below

Medians across 181 hematologists and oncologists in Colorado with Dmand AI profiles that report each measure.

Dr. Flaig'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.

See all procedures by Dr. Flaig

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Sources: Medicare Physician & Other Practitioners - by Provider and Service (CMS), 2024 data; and Dmand AI Peer Benchmarks

Dr. Thomas W. Flaig treated 86 Medicare patients in 2024, average age 76

CMS counts 86 Medicare patients who saw Dr. Flaig in 2024. The largest group is 65 to 74, with 40 patients. 75% of them have cancer, and 71% have high cholesterol. Their average risk score is 2.44, 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. Flaig's median patient age at 76, with 6% women.

Medicare patients, 202486
Average age76
Average risk score2.44

Dr. Flaig's Medicare patients by age, 2024

CMS leaves out age groups with fewer than 11 patients.

Chronic conditions among Dr. Flaig's Medicare patients, 2024

  1. Cancer75%
  2. High cholesterol71%
  3. High blood pressure63%
  4. Arthritis52%
  5. Chronic kidney disease40%
  6. Ischemic heart disease35%
  7. Mood disorders24%
  8. Diabetes22%

Share of Medicare patients with each condition. A patient can have several.

Dr. Flaig's patients across all payers

Dmand AI patient panel data covers Medicare, Medicaid and commercial patients.

Patient panel by age, all payers

Median age 76

Patient panel by sex, all payers

  • Women6%
  • Men94%

Sources: Dmand AI Patient Panel Data; and Medicare Physician & Other Practitioners - by Provider (CMS), 2024 data

Dr. Thomas W. Flaig wrote 219 Medicare Part D claims in 2024

In 2024, Dr. Flaig wrote 219 Medicare Part D claims for 30 patients. 69% of them were for generic drugs. CMS names the drug for 162 of them, across 4 drugs with 11 or more claims each, at $790,393 in total drug cost. In 2023, CMS named 58 claims across 2 drugs.

Part D claims, 2024219
Drugs named by CMS4
Total drug cost$790,393
Part D patients30

Dr. Flaig's Part D claims by kind of drug, 2024

  • Generic151 claims69%
  • Brand-name68 claims31%

Dr. Flaig'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: 582024: 162179%

Drugs named by CMS: 4 in 2024, 2 in 2023.

See all prescribing by Dr. Flaig

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

Dr. Thomas W. Flaig offers telehealth to Medicare patients

Dr. Flaig accepts Medicare assignment, so Medicare's approved amount is taken as full payment. CMS lists Dr. Flaig as offering telehealth.

Accepts Medicare assignment
Yes
Offers telehealth
Yes

Source: Doctors and Clinicians National Downloadable File (CMS)

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Dr. Thomas W. Flaig has 162 publications on record

Dmand AI links 162 papers to Dr. Flaig, published from 2006 to 2025. 2021 was the busiest year, with 13. The most frequent topics are Prostatic Neoplasms, Urinary Bladder Neoplasms and Antineoplastic Agents. Dr. Flaig has published most often in Oncology (Williston Park). Dr. Flaig's most frequent co-authors are Elizabeth Riley Kessler, MD, Elaine T. Lam, MD and Elward David Crawford, MD.

Papers162
Years published2006 to 2025

Dr. Flaig's papers by year, 2016 to 2025

Topics Dr. Flaig writes about most

  • Prostatic Neoplasms
  • Urinary Bladder Neoplasms
  • Antineoplastic Agents
  • Antineoplastic Combined Chemotherapy Protocols
  • Kidney Neoplasms
  • Neoplasm Metastasis
  • Carcinoma, Renal Cell
  • Prostatic Neoplasms, Castration-Resistant

Dr. Flaig's most frequent co-authors

Recent publications by Dr. Flaig

See all 162 publications and co-authors

See who Dr. Flaig researches with

Physician Network Discovery turns co-authorship, shared hospitals and shared groups into a map of who Dr. Flaig works with, so you can find a warm path to the right hematologists and oncologists.

How network discovery works

Sources: PubMed (National Library of Medicine); and Dmand AI Research Linkage

Dr. Thomas W. Flaig has worked on 9 clinical trials

Dmand AI links Dr. Flaig to 9 clinical trials, 4 of them phase 2 studies. 1 is still active or recruiting. Conditions studied include Urethral Neoplasms, Urinary Bladder Neoplasms and Ureteral Neoplasms. University of Colorado, Denver sponsors the most, 3. Open Payments lists research payments to Dr. Flaig that name 3 trials.

Clinical trials with Dr. Flaig by phase

  1. NonePhase 1: no trials
  2. 4Phase 2: 4 trials
  3. 2Phase 3: 2 trials
  4. NonePhase 4: no trials

Conditions in Dr. Flaig's trials

  • Urethral Neoplasms
  • Urinary Bladder Neoplasms
  • Ureteral Neoplasms
  • Urinary Bladder Diseases
  • Carcinoma, Renal Cell

Investigators on the most trials with Dr. Flaig

Recent clinical trials with Dr. Flaig

See all 9 clinical trials and co-investigators

Sources: Open Payments (CMS), 2025 data, released July 7, 2026; Dmand AI Research Linkage; and ClinicalTrials.gov (National Library of Medicine)

Dr. Thomas W. Flaig received $3,395 in industry payments from 2016 to 2025

CMS Open Payments shows 21 general payments to Dr. Flaig from 4 drug and device companies from 2016 to 2025. Consulting fees make up the largest share, 47% of the total. Genentech, Inc. paid the most, $1,887. It also lists 32 research payments totaling $18,093 from 2018 to 2025, naming 3 clinical trials.

General payments to Dr. Flaig by program year, 2016 to 2025

General payments to Dr. Flaig by kind, 2016 to 2025

$3.4Kin total
  • Consulting fees$1,60547%
  • Food and beverage$75222%
  • Compensation for serving as faculty or as a speaker for a medical education program$58517%
  • Travel and lodging$45313%

Companies that paid Dr. Flaig the most, 2016 to 2025

Share is of all general payments to this clinician.

See all payments to Dr. Flaig

Source: Open Payments (CMS), 2025 data, released July 7, 2026

Dr. Thomas W. Flaig has 1 award and honors on record

Dmand AI lists 1 award for Dr. Flaig, most recently CMS Stage 1 EHR in 2013.

Awards and honors for Dr. Flaig

  1. 2013
    • CMS Stage 1 EHR

Source: Dmand AI Professional Profile Data

Dr. Thomas W. Flaig graduated from University Of Minnesota Medical School

Dr. Flaig graduated from University Of Minnesota Medical School in 1999.

  1. Medical schoolUniversity Of Minnesota Medical School
  2. Board certified in medical oncologyAmerican Board of Internal Medicine

Source: Dmand AI Professional Profile Data

Dr. Thomas W. Flaig accepts plans from 15 insurance carriers

Dr. Flaig is in network with 15 carriers, including Aetna, Elevance and Blue Cross Blue Shield of Michigan. PPO plans come from the most carriers, 10. Check the plan with the practice before a visit.

  • Aetna
  • Elevance
  • Blue Cross Blue Shield of Michigan
  • Cigna
  • HCSC
  • United Healthcare
  • Aspirus Health Plan
  • Blue Cross Blue Shield of Massachusetts
  • +7 more carriersWith a free account

Plan types Dr. Flaig accepts, by number of carriers

  1. PPO10
  2. Medicare9
  3. HMO8
  4. POS7
  5. EPO4

Source: Dmand AI Insurance Network Data

Sources for Dr. Thomas W. Flaig's profile data

Sources for the data on this page
Data on this pageSource
NPI, name, sex, specialty and licensesNPPES NPI Registry (CMS) (opens in a new tab)Dmand AI Professional Profile Data
Practice locations and phoneDmand AI Affiliation Data
Primary practice, affiliations and health systemDmand AI Affiliation DataDmand AI Org Hierarchy Data
Medicare services and procedure codesMedicare Physician & Other Practitioners - by Provider and Service (CMS) (opens in a new tab)
State medians for the same specialtyDmand AI Peer Benchmarks
Medicare patients and the all-payer patient panelDmand AI Patient Panel DataMedicare Physician & Other Practitioners - by Provider (CMS) (opens in a new tab)
Part D prescribingMedicare 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 percentilesDoctors and Clinicians National Downloadable File (CMS) (opens in a new tab)
Publications, topics and co-authorsPubMed (National Library of Medicine) (opens in a new tab)Dmand AI Research Linkage
Clinical trials and co-investigatorsDmand AI Research LinkageClinicalTrials.gov (National Library of Medicine) (opens in a new tab)
Industry paymentsOpen Payments (CMS) (opens in a new tab)
Awards and committee rolesDmand AI Professional Profile Data
Training, board certification and membershipsDmand AI Professional Profile Data
Insurance carriers and plan typesDmand AI Insurance Network Data
EHR at each practice siteDmand AI Technology Install Data
Similar physiciansDmand AI Affiliation Data

Data last refreshed October 2026Report an inaccuracyRemove my information

FAQ

Frequently asked questions about Dr. Thomas W. Flaig

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. Thomas W. Flaig's NPI number?

Dr. Thomas W. Flaig's NPI number is 1881620326. It was assigned on June 25, 2006, and it is active in the NPI Registry.

What kind of doctor is Dr. Thomas W. Flaig?

Dr. Thomas W. Flaig is a hematologist and oncologist in Aurora, Colorado. The primary specialty in the NPI Registry is Hematology & Oncology Physician (taxonomy code 207RH0003X).

Where does Dr. Thomas W. Flaig practice?

Dr. Flaig practices at 12605 E 16th Ave, Aurora, CO 80045. Dr. Flaig's primary practice is UCHealth University of Colorado Hospital in Aurora, Colorado, part of UCHealth. Dmand AI also links Dr. Flaig to 3 hospitals.

What is Dr. Thomas W. Flaig's office phone number?

The practice phone on file for Dr. Flaig is (720) 848-0000.

What is Dr. Thomas W. Flaig's medical license number?

Dr. Flaig holds Colorado license 44457.

Which hospitals is Dr. Thomas W. Flaig affiliated with?

Dr. Flaig practices at UCHealth University of Colorado Hospital in Aurora, Colorado. Dr. Flaig is also affiliated with UCHealth Medical Center of the Rockies. Dmand AI links Dr. Flaig to 3 more hospitals.

What medical group is Dr. Thomas W. Flaig part of?

Dr. Flaig is linked to University of Colorado Medicine (CU Medicine).

Does Dr. Thomas W. Flaig accept Medicare?

Yes. CMS data shows Dr. Flaig billed Medicare for 313 services in 2024, and Dr. Flaig accepts Medicare assignment.

Does Dr. Thomas W. Flaig offer telehealth?

Yes. The CMS Doctors and Clinicians file lists Dr. Flaig as offering telehealth services.

How many Medicare patients does Dr. Thomas W. Flaig see?

CMS counts 86 Medicare patients who saw Dr. Flaig in 2024, with an average age of 76.

Show 9 more questionsShow fewer questions

Is Dr. Thomas W. Flaig board certified?

Yes. Dr. Flaig is board certified in medical oncology by the American Board of Internal Medicine.

What services does Dr. Thomas W. Flaig bill to Medicare?

In 2024, Dr. Flaig's most billed Medicare services were office visit, established patient (99215), office visit, established patient (99214) and medicare service (G2211).

Where did Dr. Thomas W. Flaig go to medical school?

Dr. Flaig graduated from University Of Minnesota Medical School in 1999.

What drugs does Dr. Thomas W. Flaig prescribe most?

In 2024 Medicare Part D data, Dr. Flaig's most prescribed drugs by claims were Abiraterone Acetate, Xtandi and Prednisone.

Has Dr. Thomas W. Flaig received payments from drug or device companies?

CMS Open Payments shows $3,395 in general payments to Dr. Flaig from 4 companies from 2016 to 2025. The largest total came from Genentech, Inc.

How long has Dr. Thomas W. Flaig been practicing?

Dr. Flaig graduated from medical school in 1999, 27 years ago.

Does Dr. Thomas W. Flaig do research?

Dmand AI links 162 publications to Dr. Flaig, published from 2006 to 2025. Dr. Flaig has worked on 9 clinical trials.

Who does Dr. Thomas W. Flaig publish with?

Dr. Flaig's most frequent co-authors are Elizabeth Riley Kessler, MD (22 shared papers), Elaine T. Lam, MD (19 shared papers) and Elward David Crawford, MD (11 shared papers).

What insurance does Dr. Thomas W. Flaig accept?

Dr. Flaig is in network with 15 carriers, including Aetna, Elevance and Blue Cross Blue Shield of Michigan. PPO plans come from the most carriers, 10. Check the plan with the practice before a visit.

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See hematologists and oncologists in Colorado by site of care and group

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