Am J Physiol Heart Circ Physiol
Animals, NewbornCalciumCalcium Signaling
Robert M. Weiss
NPI1861575953PAC ID1456398916
- Medicare services, 2024
- 678
- Medicare patients, 2024
- 428
- Part D claims, 2024
- 2,156
- Publications
- 101
- MIPS score, 2024
- 90
- Practice address
- 575 Beech Street, Holyoke, MA 01040
- Practice phone
- Call (413) 534-2500
- Professional email
- Get professional email
- Personal email
- Get personal email
- Mobile number
- Get mobile number
Primary practice
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Robert M. Weiss is a gastroenterologist in Holyoke, Massachusetts
Robert Weiss practices at Holyoke Medical Center in Holyoke, Massachusetts, part of Valley Health Systems.
Robert Weiss' NPI, 1861575953, was assigned on October 23, 2006. Robert Weiss graduated from Columbia University College of Physicians and Surgeons in 1985. Robert Weiss holds Massachusetts license 57667.
NPI and contact details
- NPI
- 1861575953NPI Registry (opens in a new tab)
- Medicare PAC ID
- 1456398916
- NPI enumeration date
- October 23, 2006
- NPI status
- Active
- Accepts Medicare assignment
- Yes
- Practice phone
- (413) 534-2500
- Professional email
- Get email
- Personal email
- Get email
- Mobile number
- Get number
- Sex
- Male
- Estimated age
- 67
- Medical school graduation
- 1985
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; Dmand AI Affiliation Data; and Doctors and Clinicians National Downloadable File (CMS)
Robert M. Weiss practices at Holyoke Medical Center in Holyoke, Massachusetts
Robert Weiss' primary practice is Holyoke Medical Center, at 575 Beech Street, Holyoke, MA 01040 in Hampden County. The practice phone is (413) 534-2500.
- Holyoke Medical Center575 Beech Street, Holyoke, MA 01040 · Hampden CountyPhone(413) 534-2500
Source: Dmand AI Affiliation Data
Robert M. Weiss is affiliated with 3 sites of care and 1 medical group
Robert Weiss' primary practice is Holyoke Medical Center in Holyoke, Massachusetts, part of Valley Health Systems. Robert Weiss is also affiliated with Cooley Dickinson Hospital. The medical group on file is Pioneer Valley Gastroenterology. Dmand AI also links Robert Weiss to 1 more group practice or clinic, named with a free account.
Cooley Dickinson HospitalPioneer Valley Gastroenterology1 group practice or clinicName with a free account
See all 4 affiliations for Robert WeissSources: Dmand AI Affiliation Data; and Dmand AI Org Hierarchy Data
Dmand AI tracks the EHR system at Robert M. Weiss' practice
Dmand AI tracks the electronic health record (EHR) system at each site where Robert Weiss practices, 3 sites in all. Vendor and product names are available with a free account.
| Site | EHR vendor and product |
|---|---|
| Holyoke Medical Center | Available with a free account |
| +2 more affiliated sites | Available with a free account |
Source: Dmand AI Technology Install Data
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Robert M. Weiss is one of 597 gastroenterologists in Massachusetts
Gastroenterology is Robert Weiss' primary specialty in the NPI Registry, under taxonomy code 207RG0100X. Robert Weiss is licensed in Massachusetts.
Specialties and state licenses
- Gastroenterology, MassachusettsPrimary
Gastroenterologists near Robert Weiss
Counts of gastroenterologists with a Dmand AI profile, by place and practice. Each opens the list.
597gastroenterologists in Massachusetts
5gastroenterologists in Holyoke
3gastroenterologists at Holyoke Medical CenterSources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; and Dmand AI Peer Benchmarks
Robert M. Weiss billed Medicare for 678 services in 2024
CMS data shows 678 Medicare services from Robert Weiss across 12 procedure codes in 2024, for 428 Medicare patients. Medicare paid $80,194 for them.
Medicare services, 2024678
Medicare patients428
Paid by Medicare$80,194
Procedure codes12
Robert Weiss' Medicare services by type, 2023 to 2024
- 2023
- 2024
- Office and hospital visits
- 2023: 3632024: 40512%
- Surgery
- 2023: 2032024: 2103%
- Other services
- 2023: 512024: 6324%
Where Robert Weiss' Medicare services took place, 2024
- In an office36354%
- In a facility31546%
Robert Weiss compared with the Massachusetts median for gastroenterologists, 2024
- Robert Weiss
- Massachusetts median
- Medicare services
- 678vs 51931% above
- Medicare patients
- 428vs 34325% above
- Part D claims
- 2,104vs 3007.0 times
Medians across 583 gastroenterologists in Massachusetts with Dmand AI profiles that report each measure.
Robert Weiss' 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
Robert M. Weiss treated 428 Medicare patients in 2024, average age 73
CMS counts 428 Medicare patients who saw Robert Weiss in 2024. The largest group is 65 to 74, with 228 patients. 75% of them have high blood pressure, and 75% have high cholesterol. 21% are also on Medicaid. Their average risk score is 1.08, where 1.00 is the Medicare average.
Across all payers, Dmand AI patient panel data puts Robert Weiss' median patient age at 68, with 49% women.
Medicare patients, 2024428
Average age73
Average risk score1.08
Also on Medicaid21%
Robert Weiss' Medicare patients by age, 2024
Robert Weiss' Medicare patients by sex, 2024
- Women21450%
- Men21450%
Chronic conditions among Robert Weiss' Medicare patients, 2024
- High blood pressure75%
- High cholesterol75%
- Arthritis45%
- Mood disorders30%
- Anxiety28%
- Diabetes28%
- Depression27%
- Ischemic heart disease25%
Share of Medicare patients with each condition. A patient can have several.
Robert Weiss' patients across all payers
Dmand AI patient panel data covers Medicare, Medicaid and commercial patients.
Patient panel by age, all payers
Median age 68
Patient panel by sex, all payers
- Women49%
- Men51%
Sources: Dmand AI Patient Panel Data; and Medicare Physician & Other Practitioners - by Provider (CMS), 2024 data
Robert M. Weiss wrote 2,156 Medicare Part D claims in 2024
In 2024, Robert Weiss wrote 2,156 Medicare Part D claims for 399 patients. 92% of them were for generic drugs. CMS names the drug for 2,104 of them, across 33 drugs with 11 or more claims each, at $1,015,002 in total drug cost. In 2023, CMS named 1,944 claims across 28 drugs.
Part D claims, 20242,156
Drugs named by CMS33
Total drug cost$1M
Part D patients399
Robert Weiss' Part D claims by kind of drug, 2024
- Generic1,977 claims92%
- Brand-name179 claims8%
Robert Weiss' 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 Robert Weiss' Part D claims, 2024
- Antibiotics2%46 of 2,156 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: 1,9442024: 2,1048%
Drugs named by CMS: 33 in 2024, 28 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
Robert M. Weiss scored 90 out of 100 in Medicare's MIPS program for 2024
CMS publishes a Merit-based Incentive Payment System (MIPS) score of 90 out of 100 for Robert Weiss for performance year 2024, reported individually. Robert Weiss accepts Medicare assignment, so Medicare's approved amount is taken as full payment. CMS counts 226 procedures of colonoscopy by Robert Weiss, more than 95% of the clinicians it reports for that procedure.
- Accepts Medicare assignment
- Yes
Robert Weiss' MIPS scores, performance year 2024
- 90of 100Final score
- 83.3of 100Quality
- 40of 100Improvement Activities
- 83of 100Cost
Each score is out of 100. The final score weighs the categories CMS scored for this clinician.
Where Robert Weiss ranks in Medicare procedure volume
- Colonoscopy
- 95th percentile226 procedures
- Upper gastrointestinal (GI) endoscopy for acid reflux
- 76th percentile97 procedures
CMS ranks each clinician against every clinician it reports for the same procedure category.
Sources: Doctors and Clinicians National Downloadable File (CMS); Clinician Public Reporting: Overall MIPS Performance (CMS), 2024 data, released September 10, 2026; and Doctors and Clinicians Utilization Data (CMS)
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Robert M. Weiss has 101 publications on record
Dmand AI links 101 papers to Robert Weiss, published from 2004 to 2024. 2022 was the busiest year, with 9. The most frequent topics are Mice, Inbred C57BL, Disease Models, Animal and Heart Failure. Robert Weiss has published most often in Am J Physiol Heart Circ Physiol. Robert Weiss' most frequent co-authors are Donald D. Heistad, MD, Ramzi N. El Accaoui, MD and Isabella Marla Grumbach, MD.
Papers101
Years published2004 to 2024
Robert Weiss' papers by year, 2015 to 2024
Topics Robert Weiss writes about most
- Mice, Inbred C57BL
- Disease Models, Animal
- Heart Failure
- Myocytes, Cardiac
- Mice, Knockout
- Rats, Sprague-Dawley
- Signal Transduction
- Myocardial Infarction
Robert Weiss' most frequent co-authors
- Donald D. Heistad, MD10 shared papers
- Ramzi N. El Accaoui, MD6 shared papers
- Isabella Marla Grumbach, MD6 shared papers
Recent publications by Robert Weiss
CalpainDisease Models, AnimalExcitation Contraction Coupling
Proc Natl Acad Sci U S A
DystroglycansExtracellular MatrixGlycosylation
Blood-Brain BarrierCaveolin 1Cytokines
Eur J Nucl Med Mol Imaging
CreatinineEarly Detection of CancerLead
See who Robert Weiss researches with
Physician Network Discovery turns co-authorship, shared hospitals and shared groups into a map of who Robert Weiss works with, so you can find a warm path to the right gastroenterologists.
Sources: PubMed (National Library of Medicine); and Dmand AI Research Linkage
Robert M. Weiss received $213 in industry payments from 2016 to 2025
CMS Open Payments shows 6 general payments to Robert Weiss from 5 drug and device companies from 2016 to 2025. Food and beverage make up the largest share, 100% of the total. Boston Scientific Corporation paid the most, $129.
General payments to Robert Weiss by program year, 2016 to 2025
Companies that paid Robert Weiss the most, 2016 to 2025
Share is of all general payments to this clinician.
Source: Open Payments (CMS), 2025 data, released July 7, 2026
Robert M. Weiss graduated from Columbia University College of Physicians and Surgeons
Robert Weiss graduated from Columbia University College of Physicians and Surgeons in 1985.
- Medical school
Source: Dmand AI Professional Profile Data
Sources for Robert M. Weiss'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)Clinician Public Reporting: Overall MIPS Performance (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 Robert M. Weiss
Spotted something out of date? Email hello@dmand.ai and we will check the record. Contact details live in the free trial.
What is Robert M. Weiss' NPI number?
Robert M. Weiss' NPI number is 1861575953. It was assigned on October 23, 2006, and it is active in the NPI Registry.
What does Robert M. Weiss specialize in?
Robert M. Weiss is a gastroenterologist in Holyoke, Massachusetts. The primary specialty in the NPI Registry is Gastroenterology Physician (taxonomy code 207RG0100X).
Where does Robert M. Weiss practice?
Robert Weiss practices at 575 Beech Street, Holyoke, MA 01040. Robert Weiss' primary practice is Holyoke Medical Center in Holyoke, Massachusetts, part of Valley Health Systems. Dmand AI also links Robert Weiss to 1 group practice or clinic.
What is Robert M. Weiss' office phone number?
The practice phone on file for Robert Weiss is (413) 534-2500.
What is Robert M. Weiss' medical license number?
Robert Weiss holds Massachusetts license 57667.
Which hospitals is Robert M. Weiss affiliated with?
Robert Weiss practices at Holyoke Medical Center in Holyoke, Massachusetts. Robert Weiss is also affiliated with Cooley Dickinson Hospital.
What medical group is Robert M. Weiss part of?
Robert Weiss is linked to Pioneer Valley Gastroenterology.
Does Robert M. Weiss accept Medicare?
Yes. CMS data shows Robert Weiss billed Medicare for 678 services in 2024, and Robert Weiss accepts Medicare assignment.
What is Robert M. Weiss' MIPS score?
Robert Weiss' MIPS final score for performance year 2024 is 90 out of 100, reported individually.
How many Medicare patients does Robert M. Weiss see?
CMS counts 428 Medicare patients who saw Robert Weiss in 2024, with an average age of 73.
Show 7 more questionsShow fewer questions
What services does Robert M. Weiss bill to Medicare?
In 2024, Robert Weiss' most billed Medicare services were office visit, established patient (99214), office visit, new patient (99204) and surgery: digestive system (45385).
Where did Robert M. Weiss go to medical school?
Robert Weiss graduated from Columbia University College of Physicians and Surgeons in 1985.
What drugs does Robert M. Weiss prescribe most?
In 2024 Medicare Part D data, Robert Weiss' most prescribed drugs by claims were Omeprazole, Dicyclomine HCl and Famotidine.
Has Robert M. Weiss received payments from drug or device companies?
CMS Open Payments shows $213 in general payments to Robert Weiss from 5 companies from 2016 to 2025. The largest total came from Boston Scientific Corporation.
How long has Robert M. Weiss been practicing?
Robert Weiss graduated from medical school in 1985, 41 years ago.
Does Robert M. Weiss do research?
Dmand AI links 101 publications to Robert Weiss, published from 2004 to 2024.
Who does Robert M. Weiss publish with?
Robert Weiss' most frequent co-authors are Donald D. Heistad, MD (10 shared papers), Ramzi N. El Accaoui, MD (6 shared papers) and Isabella Marla Grumbach, MD (6 shared papers).
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