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Dr. Robert A. Kloss, MD
NPI1649207770PAC ID5294919163
- Medicare services, 2024
- 1,822
- Medicare patients, 2024
- 305
- Part D claims, 2024
- 1,016
- Publications
- 1
- Clinical trials
- 7
- Practice address
- 100 Reserve Rd, Danbury, CT 06810
- Practice phone
- Call (203) 739-7742
- Professional email
- Get professional email
- Personal email
- Get personal email
- Mobile number
- Get mobile number
Primary practice
Nuvance Health Medical Practice CT, Inc.
Danbury, Connecticut
Find Dr. Kloss' 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. Robert A. Kloss is a hematologist and oncologist in Danbury, Connecticut
Dr. Kloss practices at Nuvance Health Medical Practice CT, Inc. in Danbury, Connecticut.
Dr. Kloss' NPI, 1649207770, was assigned on June 26, 2006. Dr. Kloss graduated from Sidney Kimmel Medical College at Thomas Jefferson University in 1976. Dr. Kloss holds Connecticut license 022825.
NPI and contact details
- NPI
- 1649207770NPI Registry (opens in a new tab)
- Medicare PAC ID
- 5294919163
- NPI enumeration date
- June 26, 2006
- NPI status
- Active
- Accepts Medicare assignment
- Yes
- Offers telehealth
- Yes
- Practice phone
- (203) 739-7742
- Professional email
- Get email
- Personal email
- Get email
- Mobile number
- Get number
- Sex
- Male
- Estimated age
- 76
- Medical school graduation
- 1976
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; Dmand AI Practice Data; and Doctors and Clinicians National Downloadable File (CMS)
Dr. Robert A. Kloss practices at Nuvance Health Medical Practice CT, Inc. in Danbury, Connecticut
Dr. Kloss' primary practice is Nuvance Health Medical Practice CT, Inc., at 100 Reserve Rd, Danbury, CT 06810 in Western Ct County. The practice phone is (203) 739-7742.
- Nuvance Health Medical Practice CT, Inc.100 Reserve Rd, Danbury, CT 06810 · Western Ct CountyPhone(203) 739-7742
Sources: NPPES NPI Registry (CMS); and Dmand AI Practice Data
Dr. Robert A. Kloss is affiliated with 3 sites of care and 1 medical group
Dr. Kloss' primary practice is Nuvance Health Medical Practice CT, Inc. in Danbury, Connecticut. Dr. Kloss is also affiliated with Northwell Danbury Hospital. The medical group on file is Danbury Medical Group. Dmand AI also links Dr. Kloss to 1 more hospice, named with a free account.
Nuvance Health Medical Practice CT, Inc.Primary
Sources: NPPES NPI Registry (CMS); Dmand AI Practice Data; Dmand AI Affiliation Data; and Dmand AI Org Hierarchy Data
Dmand AI tracks the EHR system at Dr. Robert A. Kloss' practice
Dmand AI tracks the electronic health record (EHR) system at each site where Dr. Kloss practices, 2 sites in all. Vendor and product names are available with a free account.
| Site | EHR vendor and product |
|---|---|
| Nuvance Health Medical Practice CT, Inc. | Available with a free account |
| +2 more affiliated sites | Available with a free account |
Source: Dmand AI Technology Install Data
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Dr. Robert A. Kloss is one of 175 hematologists and oncologists in Connecticut
Hematology and oncology is Dr. Kloss' primary specialty in the NPI Registry, under taxonomy code 207RH0003X. Dr. Kloss is licensed in Connecticut.
Specialties and state licenses
- Hematology and oncology, ConnecticutPrimary
Hematologists and oncologists near Dr. Kloss
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. Robert A. Kloss billed Medicare for 1,822 services in 2024
CMS data shows 1,822 Medicare services from Dr. Kloss across 5 procedure codes in 2024, for 305 Medicare patients. Medicare paid $80,145 for them. Every service was in an office.
Medicare services, 20241,822
Medicare patients305
Paid by Medicare$80,145
Procedure codes5
Dr. Kloss' Medicare services by type, 2023 to 2024
- 2023
- 2024
- Office and hospital visits
- 2023: 1,0982024: 86521%
- Lab and pathology
- 2023: 7752024: 59923%
- Surgery
- 2023: 4672024: 35823%
- Tests and treatments
- 2023: 292024: 0100%
Dr. Kloss compared with the Connecticut median for hematologists and oncologists, 2024
- Dr. Kloss
- Connecticut median
- Medicare services
- 1,822vs 5413.4 times
- Medicare patients
- 305vs 20847% above
- Part D claims
- 752vs 45167% above
Medians across 168 hematologists and oncologists in Connecticut with Dmand AI profiles that report each measure.
Dr. Kloss' 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. Kloss?
Medicare shows one payer. Book a meeting to get commercial claims data for Dr. Kloss and other hematologists and oncologists in Connecticut.
Sources: Medicare Physician & Other Practitioners - by Provider and Service (CMS), 2024 data; and Dmand AI Peer Benchmarks
Dr. Robert A. Kloss treated 305 Medicare patients in 2024, average age 78
CMS counts 305 Medicare patients who saw Dr. Kloss in 2024. The largest group is 75 to 84, with 124 patients. 75% of them have high blood pressure, and 75% have high cholesterol. 15% are also on Medicaid. Their average risk score is 2.17, 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. Kloss' median patient age at 80, with 53% women.
Medicare patients, 2024305
Average age78
Average risk score2.17
Also on Medicaid15%
Dr. Kloss' Medicare patients by age, 2024
CMS leaves out age groups with fewer than 11 patients.
Dr. Kloss' Medicare patients by sex, 2024
- Women16654%
- Men13946%
Chronic conditions among Dr. Kloss' Medicare patients, 2024
- High blood pressure75%
- High cholesterol75%
- Cancer53%
- Arthritis40%
- Ischemic heart disease29%
- Chronic kidney disease27%
- Diabetes27%
- Anxiety24%
Share of Medicare patients with each condition. A patient can have several.
Dr. Kloss' patients across all payers
Dmand AI patient panel data covers Medicare, Medicaid and commercial patients.
Patient panel by age, all payers
Median age 80
Patient panel by sex, all payers
- Women53%
- Men46%
Sources: Dmand AI Patient Panel Data; and Medicare Physician & Other Practitioners - by Provider (CMS), 2024 data
Dr. Robert A. Kloss wrote 1,016 Medicare Part D claims in 2024
In 2024, Dr. Kloss wrote 1,016 Medicare Part D claims for 185 patients. 70% of them were for generic drugs. CMS names the drug for 752 of them, across 26 drugs with 11 or more claims each, at $3,231,057 in total drug cost. In 2023, CMS named 958 claims across 35 drugs.
Part D claims, 20241,016
Drugs named by CMS26
Total drug cost$3.2M
Part D patients185
Dr. Kloss' Part D claims by kind of drug, 2024
- Generic708 claims70%
- Brand-name308 claims30%
Dr. Kloss' 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. Kloss' Part D claims, 2024
- Opioids10%98 of 1,016 claims
- Antibiotics3%26 of 1,016 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: 9582024: 75222%
Drugs named by CMS: 26 in 2024, 35 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
Dr. Robert A. Kloss offers telehealth to Medicare patients
Dr. Kloss accepts Medicare assignment, so Medicare's approved amount is taken as full payment. CMS lists Dr. Kloss as offering telehealth.
- Accepts Medicare assignment
- Yes
- Offers telehealth
- Yes
Source: Doctors and Clinicians National Downloadable File (CMS)
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Dr. Robert A. Kloss has 1 publication on record
Dmand AI links 1 paper to Dr. Kloss in 2020. Dr. Kloss' most frequent co-authors are Allen E. Bale, MD, Lohith Gowda, MD and Hadrian Mendoza, MD.
Papers1
Dr. Kloss' most frequent co-authors
- Allen E. Bale, MD1 shared paper
- Lohith Gowda, MD1 shared paper
- Hadrian Mendoza, MD1 shared paper
Recent publications by Dr. Kloss
See who Dr. Kloss researches with
Physician Network Discovery turns co-authorship, shared hospitals and shared groups into a map of who Dr. Kloss 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. Robert A. Kloss has worked on 7 clinical trials
Dmand AI links Dr. Kloss to 7 clinical trials, 4 of them phase 3 studies. 4 are still active or recruiting. Conditions studied include Carcinoma, Non-Small-Cell Lung, Carcinoma, Bronchogenic and Brenner Tumor. National Cancer Institute (NCI) sponsors the most, 4.
Clinical trials with Dr. Kloss by phase
- NonePhase 1: no trials
- NonePhase 2: no trials
- 1Phase 2/3: 1 trial
- 4Phase 3: 4 trials
- NonePhase 4: no trials
Conditions in Dr. Kloss' trials
- Carcinoma, Non-Small-Cell Lung
- Carcinoma, Bronchogenic
- Brenner Tumor
- Carcinoma, Intraductal, Noninfiltrating
- Breast Carcinoma In Situ
Investigators on the most trials with Dr. Kloss
- James Mitchell Granfortuna, MD6 shared trials
- Fariborze B. Barhamand, MD5 shared trials
- Elward David Crawford, MD5 shared trials
Recent clinical trials with Dr. Kloss
Nivolumab After Surgery and Chemotherapy in Treating Patients With Stage IB-IIIA Non-small Cell Lung Cancer (An ALCHEMIST Treatment Trial) (opens in a new tab)
Active, not recruitingPhase 3
Carcinoma, Non-Small-Cell LungCarcinoma, BronchogenicNivolumab
Erlotinib Hydrochloride in Treating Patients With Stage IB-IIIA Non-small Cell Lung Cancer That Has Been Completely Removed by Surgery (An ALCHEMIST Treatment Trial) (opens in a new tab)
Active, not recruitingPhase 3
Carcinoma, Non-Small-Cell LungCarcinoma, BronchogenicErlotinib Hydrochloride
Genetic Testing in Screening Patients With Stage IB-IIIA Non-small Cell Lung Cancer That Has Been or Will Be Removed by Surgery (The ALCHEMIST Screening Trial) (opens in a new tab)
Active, not recruiting
Carcinoma, Non-Small-Cell LungCarcinoma, BronchogenicCarboplatinCisplatinCrizotinib
DocetaxelDurvalumabErlotinib Hydrochloride
Sources: Dmand AI Research Linkage; and ClinicalTrials.gov (National Library of Medicine)
Dr. Robert A. Kloss received $14,998 in industry payments from 2016 to 2025
CMS Open Payments shows 787 general payments to Dr. Kloss from 69 drug and device companies from 2016 to 2025. Food and beverage make up the largest share, 94% of the total. Janssen Pharmaceuticals, Inc paid the most, $1,458. It also lists 1 research payment totaling $63 in 2016.
General payments to Dr. Kloss by program year, 2016 to 2025
General payments to Dr. Kloss by kind, 2016 to 2025
$15Kin total
- Food and beverage$14,07394%
- Education$9266%
Companies that paid Dr. Kloss the most, 2016 to 2025
Share is of all general payments to this clinician.
Source: Open Payments (CMS), 2025 data, released July 7, 2026
Dr. Robert A. Kloss graduated from Sidney Kimmel Medical College at Thomas Jefferson University
Dr. Kloss graduated from Sidney Kimmel Medical College at Thomas Jefferson University in 1976.
- Medical school
Source: Dmand AI Professional Profile Data
Sources for Dr. Robert A. Kloss'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 | NPPES NPI Registry (CMS) (opens in a new tab)Dmand AI Practice Data |
| Primary practice, affiliations and health system | NPPES NPI Registry (CMS) (opens in a new tab)Dmand AI Practice DataDmand 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) |
| 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. Robert A. Kloss
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. Robert A. Kloss' NPI number?
Dr. Robert A. Kloss' NPI number is 1649207770. It was assigned on June 26, 2006, and it is active in the NPI Registry.
What kind of doctor is Dr. Robert A. Kloss?
Dr. Robert A. Kloss is a hematologist and oncologist in Danbury, Connecticut. The primary specialty in the NPI Registry is Hematology & Oncology Physician (taxonomy code 207RH0003X).
Where does Dr. Robert A. Kloss practice?
Dr. Kloss practices at 100 Reserve Rd, Danbury, CT 06810. Dr. Kloss' primary practice is Nuvance Health Medical Practice CT, Inc. in Danbury, Connecticut. Dmand AI also links Dr. Kloss to 1 hospice.
What is Dr. Robert A. Kloss' office phone number?
The practice phone on file for Dr. Kloss is (203) 739-7742.
What is Dr. Robert A. Kloss' medical license number?
Dr. Kloss holds Connecticut license 022825.
Which hospitals is Dr. Robert A. Kloss affiliated with?
Dr. Kloss is affiliated with Northwell Danbury Hospital.
What medical group is Dr. Robert A. Kloss part of?
Dr. Kloss is linked to Danbury Medical Group.
Does Dr. Robert A. Kloss accept Medicare?
Yes. CMS data shows Dr. Kloss billed Medicare for 1,822 services in 2024, and Dr. Kloss accepts Medicare assignment.
Does Dr. Robert A. Kloss offer telehealth?
Yes. The CMS Doctors and Clinicians file lists Dr. Kloss as offering telehealth services.
How many Medicare patients does Dr. Robert A. Kloss see?
CMS counts 305 Medicare patients who saw Dr. Kloss in 2024, with an average age of 78.
Show 7 more questionsShow fewer questions
What services does Dr. Robert A. Kloss bill to Medicare?
In 2024, Dr. Kloss' most billed Medicare services were lab and pathology test (85025), office visit, established patient (99213) and surgery: heart and blood vessels (36415).
Where did Dr. Robert A. Kloss go to medical school?
Dr. Kloss graduated from Sidney Kimmel Medical College at Thomas Jefferson University in 1976.
What drugs does Dr. Robert A. Kloss prescribe most?
In 2024 Medicare Part D data, Dr. Kloss' most prescribed drugs by claims were Abiraterone Acetate, Prednisone and Imbruvica.
Has Dr. Robert A. Kloss received payments from drug or device companies?
CMS Open Payments shows $14,998 in general payments to Dr. Kloss from 69 companies from 2016 to 2025. The largest total came from Janssen Pharmaceuticals, Inc.
How long has Dr. Robert A. Kloss been practicing?
Dr. Kloss graduated from medical school in 1976, 50 years ago.
Does Dr. Robert A. Kloss do research?
Dmand AI links 1 publication to Dr. Kloss. Dr. Kloss has worked on 7 clinical trials.
Who does Dr. Robert A. Kloss publish with?
Dr. Kloss' most frequent co-authors are Allen E. Bale, MD (1 shared paper), Lohith Gowda, MD (1 shared paper) and Hadrian Mendoza, MD (1 shared paper).
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