AbataceptAntirheumatic AgentsArthritis, Psoriatic
Dr. Geoffrey S. Gladstein, MD
NPI1427060938
- Medicare services, 2020
- 103
- Part D claims, 2020
- 1,115
- Publications
- 2
- Clinical trials
- 11
- Industry payments
- $24,508
- Practice address
- 5520 Park Ave Suite M1 700 Suite M1, Trumbull, CT 06611-3463
- Practice phone
- Call (203) 371-5873
- Professional email
- Get professional email
- Personal email
- Get personal email
- Mobile number
- Get mobile number
Primary practice
Northeast Medical Group - OB/GYN & Women's Health - Trumbull (Park Ave)
Multi-specialty group site · Trumbull, Connecticut
Find Dr. Gladstein's professional email, personal email and mobile number
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Dr. Geoffrey S. Gladstein is a rheumatologist in Greenwich, Connecticut
Dr. Gladstein practices at Northeast Medical Group - OB/GYN & Women's Health - Trumbull (Park Ave) in Trumbull, Connecticut.
Dr. Gladstein's NPI, 1427060938, was assigned on August 13, 2006. Dr. Gladstein graduated from George Washington University School of Medicine in 1973. Dr. Gladstein holds Connecticut license 020015.
NPI and contact details
- NPI
- 1427060938NPI Registry (opens in a new tab)
- NPI enumeration date
- August 13, 2006
- NPI status
- Active
- Practice phone
- (203) 371-5873
- Professional email
- Get email
- Personal email
- Get email
- Mobile number
- Get number
- Sex
- Male
- Estimated age
- 79
- Medical school graduation
- 1973
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; Dmand AI Affiliation Data; and Doctors and Clinicians National Downloadable File (CMS)
Dr. Geoffrey S. Gladstein practices in Trumbull and Greenwich
Dr. Gladstein's primary practice is Northeast Medical Group - OB/GYN & Women's Health - Trumbull (Park Ave), at 5520 Park Ave Suite M1 700 Suite M1, Trumbull, CT 06611-3463. The practice phone is (203) 371-5873. The NPI Registry lists Dr. Gladstein's practice address as 5 Perryridge Rd, Greenwich, CT 06830.
- Northeast Medical Group - OB/GYN & Women's Health - Trumbull (Park Ave)Primary5520 Park Ave Suite M1 700 Suite M1, Trumbull, CT 06611-3463Phone(203) 371-5873
- NPI Registry address5 Perryridge Rd, Greenwich, CT 06830 · Western Ct CountyPhone(203) 371-5873
Sources: NPPES NPI Registry (CMS); Dmand AI Affiliation Data; Doctors and Clinicians National Downloadable File (CMS); and Dmand AI Practice Data
Dr. Geoffrey S. Gladstein is affiliated with 1 site of care and 1 medical group
Dr. Gladstein's primary practice is Northeast Medical Group - OB/GYN & Women's Health - Trumbull (Park Ave) in Trumbull, Connecticut. The medical group on file is Northeast Medical Group.
Northeast Medical Group - OB/GYN & Women's Health - Trumbull (Park Ave)Primary
Sources: Dmand AI Affiliation Data; and Doctors and Clinicians National Downloadable File (CMS)
Dmand AI tracks the EHR system at Dr. Geoffrey S. Gladstein's practice
Dmand AI tracks the electronic health record (EHR) system at each site where Dr. Gladstein practices. Vendor and product names are available with a free account.
| Site | EHR vendor and product |
|---|---|
| Northeast Medical Group - OB/GYN & Women's Health - Trumbull (Park Ave) | Available with a free account |
Source: Dmand AI Technology Install Data
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Dr. Geoffrey S. Gladstein is one of 109 rheumatologists in Connecticut
Rheumatology is Dr. Gladstein's primary specialty in the NPI Registry, under taxonomy code 207RR0500X. Dr. Gladstein is licensed in Connecticut.
Specialties and state licenses
- Rheumatology, ConnecticutPrimary
Rheumatologists near Dr. Gladstein
Counts of rheumatologists with a Dmand AI profile, by place and practice. Each opens the list.
109rheumatologists in Connecticut
3rheumatologists in Greenwich
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; and Dmand AI Peer Benchmarks
Dr. Geoffrey S. Gladstein billed Medicare for 103 services in 2020
CMS data shows 103 Medicare services from Dr. Gladstein across 4 procedure codes in 2020. Medicare paid $6,273 for them. Every service was in an office.
Medicare services, 2020103
Paid by Medicare$6,273
Procedure codes4
Dr. Gladstein's Medicare services by type, 2019 to 2020
- 2019
- 2020
- Office and hospital visits
- 2019: 4662020: 10378%
- Drugs given in the office
- 2019: 1,2332020: 0100%
- Tests and treatments
- 2019: 1122020: 0100%
- Surgery
- 2019: 602020: 0100%
Dr. Gladstein compared with the Connecticut median for rheumatologists, 2020
- Dr. Gladstein
- Connecticut median
- Medicare services
- 103vs 43076% below
- Part D claims
- 1,115vs 1,1856% below
Medians across 110 rheumatologists in Connecticut with Dmand AI profiles that report each measure.
Dr. Gladstein's most billed Medicare procedure codes, 2020
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. Gladstein?
Medicare shows one payer. Book a meeting to get commercial claims data for Dr. Gladstein and other rheumatologists in Connecticut.
Sources: Medicare Physician & Other Practitioners - by Provider and Service (CMS), 2024 data; and Dmand AI Peer Benchmarks
Dr. Geoffrey S. Gladstein's patients have a median age of 69
Across all payers, Dmand AI patient panel data puts Dr. Gladstein's median patient age at 69, with 61% women.
Dr. Gladstein'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
- Women61%
- Men39%
Source: Dmand AI Patient Panel Data
Dr. Geoffrey S. Gladstein wrote 1,115 Medicare Part D claims in 2020
In 2020, Dr. Gladstein wrote 1,115 Medicare Part D claims. They cover 23 drugs, with $406,063 in total drug cost. In 2019, CMS named 2,646 claims across 38 drugs.
Part D claims, 20201,115
Drugs named by CMS23
Total drug cost$406,063
Dr. Gladstein's most prescribed drugs by claims, 2020
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, 2019 to 2020
- 2019
- 2020
- Claims for drugs CMS names
- 2019: 2,6462020: 1,11558%
Drugs named by CMS: 23 in 2020, 38 in 2019.
Source: Medicare Part D Prescribers - by Provider and Drug (CMS), 2024 data, released May 6, 2026
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Dr. Geoffrey S. Gladstein has 2 publications on record
Dmand AI links 2 papers to Dr. Gladstein in 2011. Dr. Gladstein's most frequent co-authors are Mark Christopher Genovese, MD, Jeffrey L. Kaine, MD and Alan J. Kivitz, MD.
Papers2
Dr. Gladstein's most frequent co-authors
- Mark Christopher Genovese, MD1 shared paper
- Jeffrey L. Kaine, MD1 shared paper
- Alan J. Kivitz, MD1 shared paper
Recent publications by Dr. Gladstein
See who Dr. Gladstein researches with
Physician Network Discovery turns co-authorship, shared hospitals and shared groups into a map of who Dr. Gladstein works with, so you can find a warm path to the right rheumatologists.
Sources: PubMed (National Library of Medicine); and Dmand AI Research Linkage
Dr. Geoffrey S. Gladstein has worked on 11 clinical trials
Dmand AI links Dr. Gladstein to 11 clinical trials, 3 of them phase 3 studies. Conditions studied include Arthritis, Rheumatoid, Rheumatic Diseases and Axial Spondyloarthritis. Eli Lilly and Company sponsors the most, 7. Open Payments lists research payments to Dr. Gladstein that name 5 trials.
Conditions in Dr. Gladstein's trials
- Arthritis, Rheumatoid
- Rheumatic Diseases
- Axial Spondyloarthritis
- Lupus Erythematosus, Systemic
- Spondylitis, Ankylosing
Investigators on the most trials with Dr. Gladstein
- Roger Joseph Diegel, MD8 shared trials
- Steven J. Klein, MD7 shared trials
- Christopher Ryan Antolini, MD6 shared trials
Recent clinical trials with Dr. Gladstein
Efficacy and Safety of Olokizumab in Subjects With Moderately to Severely Active Rheumatoid Arthritis (opens in a new tab)
CompletedPhase 3
Arthritis, RheumatoidLymphoma, FollicularConcomitant treatmentOlokizumab 64 mg SC q2wOlokizumab 64 mg SC q4w
Arthritis, RheumatoidRheumatic DiseasesOlokizumab
Arthritis, RheumatoidRheumatic DiseasesAdalimumab 40mg q2wOlokizumab 64mg q2wOlokizumab 64mg q4w
$1,759 in research paymentsGiant Cell ArteritisVasculitis, Central Nervous SystemPrednisoneSarilumab SAR153191
$137 in research paymentsSpondylitis, AnkylosingAxial SpondyloarthritisIxekizumab
Sources: Open Payments (CMS), 2025 data, released July 7, 2026; Dmand AI Research Linkage; and ClinicalTrials.gov (National Library of Medicine)
Dr. Geoffrey S. Gladstein received $24,508 in industry payments from 2016 to 2020
CMS Open Payments shows 375 general payments to Dr. Gladstein from 30 drug and device companies from 2016 to 2020. Consulting fees make up the largest share, 60% of the total. Ironwood Pharmaceuticals, Inc paid the most, $7,909. It also lists 33 research payments totaling $27,570 from 2016 to 2022, naming 5 clinical trials.
General payments to Dr. Gladstein by program year, 2016 to 2020
General payments to Dr. Gladstein by kind, 2016 to 2020
$24.5Kin total
- Consulting fees$14,59060%
- Food and beverage$7,66531%
- Travel and lodging$2,2029%
- Education$520%
Companies that paid Dr. Gladstein the most, 2016 to 2020
Share is of all general payments to this clinician.
Source: Open Payments (CMS), 2025 data, released July 7, 2026
Dr. Geoffrey S. Gladstein graduated from George Washington University School of Medicine
Dr. Gladstein graduated from George Washington University School of Medicine in 1973.
- Medical school
Source: Dmand AI Professional Profile Data
Sources for Dr. Geoffrey S. Gladstein'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 Affiliation DataDoctors and Clinicians National Downloadable File (CMS) (opens in a new tab)Dmand AI Practice Data |
| Primary practice, affiliations and health system | Dmand AI Affiliation DataDoctors and Clinicians National Downloadable File (CMS) (opens in a new tab) |
| 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 Data |
| Part D prescribing | Medicare Part D Prescribers - by Provider and Drug (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. Geoffrey S. Gladstein
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. Geoffrey S. Gladstein's NPI number?
Dr. Geoffrey S. Gladstein's NPI number is 1427060938. It was assigned on August 13, 2006, and it is active in the NPI Registry.
What kind of doctor is Dr. Geoffrey S. Gladstein?
Dr. Geoffrey S. Gladstein is a rheumatologist in Greenwich, Connecticut. The primary specialty in the NPI Registry is Rheumatology Physician (taxonomy code 207RR0500X).
Where does Dr. Geoffrey S. Gladstein practice?
Dr. Gladstein practices at 5520 Park Ave Suite M1 700 Suite M1, Trumbull, CT 06611-3463. Dr. Gladstein also practices at 5 Perryridge Rd, Greenwich, CT 06830. Dr. Gladstein's primary practice is Northeast Medical Group - OB/GYN & Women's Health - Trumbull (Park Ave) in Trumbull, Connecticut.
What is Dr. Geoffrey S. Gladstein's office phone number?
The practice phone on file for Dr. Gladstein is (203) 371-5873.
What is Dr. Geoffrey S. Gladstein's medical license number?
Dr. Gladstein holds Connecticut license 020015.
What medical group is Dr. Geoffrey S. Gladstein part of?
Dr. Gladstein is linked to Northeast Medical Group.
Does Dr. Geoffrey S. Gladstein accept Medicare?
Yes. CMS data shows Dr. Gladstein billed Medicare for 103 services in 2020.
What services does Dr. Geoffrey S. Gladstein bill to Medicare?
In 2020, Dr. Gladstein's most billed Medicare services were care management and other visits (99442), office visit, established patient (99214) and office visit, established patient (99213).
Where did Dr. Geoffrey S. Gladstein go to medical school?
Dr. Gladstein graduated from George Washington University School of Medicine in 1973.
What drugs does Dr. Geoffrey S. Gladstein prescribe most?
In 2020 Medicare Part D data, Dr. Gladstein's most prescribed drugs by claims were Prednisone, Meloxicam and Methotrexate.
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Has Dr. Geoffrey S. Gladstein received payments from drug or device companies?
CMS Open Payments shows $24,508 in general payments to Dr. Gladstein from 30 companies from 2016 to 2020. The largest total came from Ironwood Pharmaceuticals, Inc.
How long has Dr. Geoffrey S. Gladstein been practicing?
Dr. Gladstein graduated from medical school in 1973, 53 years ago.
Does Dr. Geoffrey S. Gladstein do research?
Dmand AI links 2 publications to Dr. Gladstein. Dr. Gladstein has worked on 11 clinical trials.
Who does Dr. Geoffrey S. Gladstein publish with?
Dr. Gladstein's most frequent co-authors are Mark Christopher Genovese, MD (1 shared paper), Jeffrey L. Kaine, MD (1 shared paper) and Alan J. Kivitz, MD (1 shared paper).
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