Semin Thorac Cardiovasc Surg
Dr. Robert S. Kramer, MD
NPI1215036900
- Publications
- 53
- Clinical trials
- 4
- Industry payments
- $8,290
- Affiliated sites
- 3
- Medical groups
- 3
- Practice address
- 818 Congress St, Portland, ME 04102-3112
- Practice phone
- Call (207) 773-8161
- Professional email
- Get professional email
- Personal email
- Get personal email
- Mobile number
- Get mobile number
Primary practice
Mainehealth - Portland (818 Congress St)
Primary care practice · Portland, Maine
Find Dr. Kramer's professional email, personal email and mobile number
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Dr. Robert S. Kramer is a cardiothoracic surgeon in Portland, Maine
Dr. Kramer practices at Mainehealth - Portland (818 Congress St) in Portland, Maine.
Dr. Kramer's NPI, 1215036900, was assigned on September 21, 2006. Dr. Kramer holds Maine license MD10216.
NPI and contact details
- NPI
- 1215036900NPI Registry (opens in a new tab)
- NPI enumeration date
- September 21, 2006
- NPI status
- Active
- Practice phone
- (207) 773-8161
- Professional email
- Get email
- Personal email
- Get email
- Mobile number
- Get number
- Sex
- Male
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; Dmand AI Affiliation Data; and Doctors and Clinicians National Downloadable File (CMS)
Dr. Robert S. Kramer practices at 2 locations in Portland, Maine
Dr. Kramer's primary practice is Mainehealth - Portland (818 Congress St), at 818 Congress St, Portland, ME 04102-3112. The practice phone is (207) 773-8161. The NPI Registry lists Dr. Kramer's practice address as 22 Bramhall St, Portland, ME 04102.
- Mainehealth - Portland (818 Congress St)Primary818 Congress St, Portland, ME 04102-3112Phone(207) 773-8161
- NPI Registry address22 Bramhall St, Portland, ME 04102 · Cumberland CountyPhone(207) 773-8161
Sources: NPPES NPI Registry (CMS); Dmand AI Affiliation Data; Doctors and Clinicians National Downloadable File (CMS); and Dmand AI Practice Data
Dr. Robert S. Kramer is affiliated with 3 sites of care and 3 medical groups
Dr. Kramer's primary practice is Mainehealth - Portland (818 Congress St) in Portland, Maine. The medical group on file is MaineHealth Primary Care - Family Medicine - Portland. Dmand AI also links Dr. Kramer to 2 more group practices and clinics and 2 medical groups, each named with a free account.
Mainehealth - Portland (818 Congress St)Primary
Sources: Dmand AI Affiliation Data; and Doctors and Clinicians National Downloadable File (CMS)
Dmand AI tracks the EHR system at Dr. Robert S. Kramer's practice
Dmand AI tracks the electronic health record (EHR) system at each site where Dr. Kramer practices, 3 sites in all. Vendor and product names are available with a free account.
| Site | EHR vendor and product |
|---|---|
| Mainehealth - Portland (818 Congress St) | Available with a free account |
| +2 more sites and 2 medical groups | Available with a free account |
Source: Dmand AI Technology Install Data
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Dr. Robert S. Kramer is one of 26 cardiothoracic surgeons in Maine
Thoracic surgery (cardiothoracic vascular surgery) is Dr. Kramer's primary specialty in the NPI Registry, under taxonomy code 208G00000X. Dr. Kramer is licensed in Maine.
Specialties and state licenses
- Thoracic surgery (cardiothoracic vascular surgery), MainePrimary
Cardiothoracic surgeons near Dr. Kramer
Counts of cardiothoracic surgeons 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 S. Kramer's patients have a median age of 73
Across all payers, Dmand AI patient panel data puts Dr. Kramer's median patient age at 73, with 0% women.
Dr. Kramer's patients across all payers
Dmand AI patient panel data covers Medicare, Medicaid and commercial patients.
Patient panel by age, all payers
Median age 73
Patient panel by sex, all payers
- Women0%
- Men100%
Source: Dmand AI Patient Panel Data
Dr. Robert S. Kramer has 53 publications on record
Dmand AI links 53 papers to Dr. Kramer, published from 2009 to 2025. 2020 was the busiest year, with 5. The most frequent topics are Cardiac Surgical Procedures, Coronary Artery Bypass and Postoperative Complications. Dr. Kramer has published most often in Ann Thorac Surg. Dr. Kramer's most frequent co-authors are Anthony W. Discipio, MD, Bruce J. Leavitt, MD and Gerald L. Sardella, FACS, MD.
Papers53
Years published2009 to 2025
Dr. Kramer's papers by year, 2016 to 2025
Topics Dr. Kramer writes about most
- Cardiac Surgical Procedures
- Coronary Artery Bypass
- Postoperative Complications
- Acute Kidney Injury
- Cardiopulmonary Bypass
- Blood Transfusion
- Coronary Artery Disease
- Hospital Mortality
Dr. Kramer's most frequent co-authors
- Anthony W. Discipio, MD12 shared papers
- Bruce J. Leavitt, MD12 shared papers
- Gerald L. Sardella, FACS, MD12 shared papers
Recent publications by Dr. Kramer
See who Dr. Kramer researches with
Physician Network Discovery turns co-authorship, shared hospitals and shared groups into a map of who Dr. Kramer works with, so you can find a warm path to the right cardiothoracic surgeons.
Sources: PubMed (National Library of Medicine); and Dmand AI Research Linkage
Dr. Robert S. Kramer has worked on 4 clinical trials
Dmand AI links Dr. Kramer to 4 clinical trials. 1 is still active or recruiting. Conditions studied include Atherosclerosis, Cytokine Release Syndrome and Arteriosclerosis. Unity Health Toronto sponsors the most, 2.
Clinical trials with Dr. Kramer by phase
- NonePhase 1: no trials
- NonePhase 2: no trials
- 1Phase 2/3: 1 trial
- 1Phase 3: 1 trial
- 1Phase 4: 1 trial
Conditions in Dr. Kramer's trials
- Atherosclerosis
- Cytokine Release Syndrome
- Arteriosclerosis
- Shock
Investigators on the most trials with Dr. Kramer
- David Keith Mazer, MD2 shared trials
- Michael Eugene Bowdish, MD1 shared trial
- Miguel Angel Bravo, MD1 shared trial
Recent clinical trials with Dr. Kramer
MSCs in COVID-19 ARDS (opens in a new tab)
TerminatedPhase 3
Cytokine Release SyndromeShockRemestemcel-L
Effect of Evolocumab on Saphenous Vein Graft Patency Following Coronary Artery Bypass Surgery (opens in a new tab)
CompletedPhase 4
AtherosclerosisArteriosclerosisEvolocumab
Sources: Dmand AI Research Linkage; and ClinicalTrials.gov (National Library of Medicine)
Dr. Robert S. Kramer received $8,290 in industry payments from 2016 to 2024
CMS Open Payments shows 17 general payments to Dr. Kramer from 8 drug and device companies from 2016 to 2024. Consulting fees make up the largest share, 69% of the total. Biotest AG paid the most, $3,200.
General payments to Dr. Kramer by program year, 2016 to 2024
General payments to Dr. Kramer by kind, 2016 to 2024
$8.3Kin total
- Consulting fees$5,70069%
- Honoraria$1,50018%
- Food and beverage$1,07813%
- Education$130%
Companies that paid Dr. Kramer the most, 2016 to 2024
Share is of all general payments to this clinician.
Source: Open Payments (CMS), 2025 data, released July 7, 2026
Sources for Dr. Robert S. Kramer'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 patients and the all-payer patient panel | Dmand AI Patient Panel Data |
| 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) |
| 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 S. Kramer
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 S. Kramer's NPI number?
Dr. Robert S. Kramer's NPI number is 1215036900. It was assigned on September 21, 2006, and it is active in the NPI Registry.
What kind of doctor is Dr. Robert S. Kramer?
Dr. Robert S. Kramer is a cardiothoracic surgeon in Portland, Maine. The primary specialty in the NPI Registry is Thoracic Surgery (Cardiothoracic Vascular Surgery) Physician (taxonomy code 208G00000X).
Where does Dr. Robert S. Kramer practice?
Dr. Kramer practices at 818 Congress St, Portland, ME 04102-3112. Dr. Kramer also practices at 22 Bramhall St, Portland, ME 04102. Dr. Kramer's primary practice is Mainehealth - Portland (818 Congress St) in Portland, Maine. Dmand AI also links Dr. Kramer to 2 group practices and clinics and 2 medical groups.
What is Dr. Robert S. Kramer's office phone number?
The practice phone on file for Dr. Kramer is (207) 773-8161.
What is Dr. Robert S. Kramer's medical license number?
Dr. Kramer holds Maine license MD10216.
What medical group is Dr. Robert S. Kramer part of?
Dr. Kramer is linked to MaineHealth Primary Care - Family Medicine - Portland. Dmand AI links Dr. Kramer to 2 more medical groups.
Has Dr. Robert S. Kramer received payments from drug or device companies?
CMS Open Payments shows $8,290 in general payments to Dr. Kramer from 8 companies from 2016 to 2024. The largest total came from Biotest AG.
How long has Dr. Robert S. Kramer been practicing?
Dr. Kramer's NPI was assigned in 2006.
Does Dr. Robert S. Kramer do research?
Dmand AI links 53 publications to Dr. Kramer, published from 2009 to 2025. Dr. Kramer has worked on 4 clinical trials.
Who does Dr. Robert S. Kramer publish with?
Dr. Kramer's most frequent co-authors are Anthony W. Discipio, MD (12 shared papers), Bruce J. Leavitt, MD (12 shared papers) and Gerald L. Sardella, FACS, MD (12 shared papers).
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