Clin Genitourin Cancer
Bone NeoplasmsLeukemia, Myeloid, AcuteNeoplasms, Second Primary
Dr. Christopher G. Tretter, MD
NPI1083648133PAC ID9739074048
- Medicare services, 2024
- 321
- Medicare patients, 2024
- 88
- Part D claims, 2024
- 565
- Publications
- 3
- MIPS score, 2024
- 98
- Practice address
- 22 Bramhall St, Portland, ME 04102
- Practice phone
- Call (207) 662-0111
- Professional email
- Get professional email
- Personal email
- Get personal email
- Mobile number
- Get mobile number
Primary practice
Find Dr. Tretter's 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. Christopher G. Tretter is a hematologist and oncologist in Portland, Maine
Dr. Tretter practices at MaineHealth Maine Medical Center in Portland, Maine, part of MaineHealth.
Dr. Tretter's NPI, 1083648133, was assigned on July 11, 2006. Dr. Tretter graduated from McGill University, Faculty of Medicine in 1994. Dr. Tretter holds Maine license 27471.
NPI and contact details
- NPI
- 1083648133NPI Registry (opens in a new tab)
- Medicare PAC ID
- 9739074048
- NPI enumeration date
- July 11, 2006
- NPI status
- Active
- Accepts Medicare assignment
- Yes
- Offers telehealth
- Yes
- Practice phone
- (207) 662-0111
- Professional email
- Get email
- Personal email
- Get email
- Mobile number
- Get number
- Sex
- Male
- Estimated age
- 58
- Medical school graduation
- 1994
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; Dmand AI Affiliation Data; and Doctors and Clinicians National Downloadable File (CMS)
Dr. Christopher G. Tretter practices at MaineHealth Maine Medical Center in Portland, Maine
Dr. Tretter's primary practice is MaineHealth Maine Medical Center, at 22 Bramhall St, Portland, ME 04102 in Cumberland County. The practice phone is (207) 662-0111.
- MaineHealth Maine Medical Center22 Bramhall St, Portland, ME 04102 · Cumberland CountyPhone(207) 662-0111
Source: Dmand AI Affiliation Data
Dr. Christopher G. Tretter is affiliated with 5 sites of care and 3 medical groups
Dr. Tretter's primary practice is MaineHealth Maine Medical Center in Portland, Maine, part of MaineHealth. Dr. Tretter is also affiliated with Beth Israel Deaconess Medical Center. The medical group on file is MaineHealth Primary Care - Family Medicine - Portland. Dmand AI also links Dr. Tretter to 2 more hospitals, 2 medical groups and 1 hospice, each named with a free account.
Beth Israel Deaconess Medical CenterMaineHealth Primary Care - Family Medicine - Portland2 hospitalsNames with a free account2 medical groupsNames with a free account1 hospiceName with a free account
See all 8 affiliations for Dr. TretterSources: Dmand AI Affiliation Data; and Dmand AI Org Hierarchy Data
Dmand AI tracks the EHR system at Dr. Christopher G. Tretter's practice
Dmand AI tracks the electronic health record (EHR) system at each site where Dr. Tretter practices, 5 sites in all. Vendor and product names are available with a free account.
| Site | EHR vendor and product |
|---|---|
| MaineHealth Maine Medical Center | Available with a free account |
| +4 more sites and 2 medical groups | Available with a free account |
Source: Dmand AI Technology Install Data
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Dr. Christopher G. Tretter is one of 70 hematologists and oncologists in Maine
Hematology and oncology is Dr. Tretter's primary specialty in the NPI Registry, under taxonomy code 207RH0003X. Dmand AI has Dr. Tretter's licenses on file in 2 states: Maine and Massachusetts.
Specialties and state licenses
- Hematology and oncology, MainePrimary
- Massachusetts license
Hematologists and oncologists near Dr. Tretter
Counts of hematologists and oncologists with a Dmand AI profile, by place and practice. Each opens the list.
70hematologists and oncologists in Maine13hematologists and oncologists in Portland10hematologists and oncologists at MaineHealth Maine Medical Center
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; and Dmand AI Peer Benchmarks
Dr. Christopher G. Tretter billed Medicare for 321 services in 2024
CMS data shows 321 Medicare services from Dr. Tretter across 3 procedure codes in 2024, all of them office visits, for 88 Medicare patients. Medicare paid $27,387 for them. Every service was in an office.
Medicare services, 2024321
Medicare patients88
Paid by Medicare$27,387
Procedure codes3
Dr. Tretter's Medicare services by type, 2023 to 2024
- 2023
- 2024
- Office and hospital visits
- 2023: 1,0582024: 32170%
Dr. Tretter compared with the Maine median for hematologists and oncologists, 2024
- Dr. Tretter
- Maine median
- Medicare services
- 321vs 38416% below
- Medicare patients
- 88vs 17851% below
- Part D claims
- 417vs 29243% above
Medians across 72 hematologists and oncologists in Maine with Dmand AI profiles that report each measure.
Dr. Tretter'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.
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Medicare shows one payer. Book a meeting to get commercial claims data for Dr. Tretter and other hematologists and oncologists in Maine.
Sources: Medicare Physician & Other Practitioners - by Provider and Service (CMS), 2024 data; and Dmand AI Peer Benchmarks
Dr. Christopher G. Tretter treated 88 Medicare patients in 2024, average age 75
CMS counts 88 Medicare patients who saw Dr. Tretter in 2024. The largest group is 65 to 74, with 38 patients. 70% of them have cancer, and 68% have high blood pressure. 19% are also on Medicaid. Their average risk score is 1.84, 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. Tretter's median patient age at 74, with 17% women.
Medicare patients, 202488
Average age75
Average risk score1.84
Also on Medicaid19%
Dr. Tretter's Medicare patients by age, 2024
CMS leaves out age groups with fewer than 11 patients.
Dr. Tretter's Medicare patients by sex, 2024
- Women1416%
- Men7484%
Chronic conditions among Dr. Tretter's Medicare patients, 2024
- Cancer70%
- High blood pressure68%
- High cholesterol61%
- Arthritis40%
- Chronic kidney disease31%
- Anxiety30%
- Ischemic heart disease28%
- COPD23%
Share of Medicare patients with each condition. A patient can have several.
Dr. Tretter's patients across all payers
Dmand AI patient panel data covers Medicare, Medicaid and commercial patients.
Patient panel by age, all payers
Median age 74
Patient panel by sex, all payers
- Women17%
- Men82%
Sources: Dmand AI Patient Panel Data; and Medicare Physician & Other Practitioners - by Provider (CMS), 2024 data
Dr. Christopher G. Tretter wrote 565 Medicare Part D claims in 2024
In 2024, Dr. Tretter wrote 565 Medicare Part D claims for 112 patients. 88% of them were for generic drugs. CMS names the drug for 417 of them, across 10 drugs with 11 or more claims each, at $539,847 in total drug cost. In 2023, CMS named 752 claims across 20 drugs.
Part D claims, 2024565
Drugs named by CMS10
Total drug cost$539,847
Part D patients112
Dr. Tretter's Part D claims by kind of drug, 2024
- Generic496 claims88%
- Brand-name69 claims12%
Dr. Tretter'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.
Drug classes CMS tracks in Dr. Tretter's Part D claims, 2024
- Opioids4%22 of 565 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: 7522024: 41745%
Drugs named by CMS: 10 in 2024, 20 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. Christopher G. Tretter scored 98 out of 100 in Medicare's MIPS program for 2024
CMS publishes a Merit-based Incentive Payment System (MIPS) score of 98 out of 100 for Dr. Tretter for performance year 2024, reported through an alternative payment model (APM). Dr. Tretter accepts Medicare assignment, so Medicare's approved amount is taken as full payment. CMS lists Dr. Tretter as offering telehealth.
- Accepts Medicare assignment
- Yes
- Offers telehealth
- Yes
Dr. Tretter's MIPS scores, performance year 2024
- 98of 100Final score
- 83.3of 100Quality
- 100of 100Promoting Interoperability
- 40of 100Improvement Activities
Each score is out of 100. The final score weighs the categories CMS scored for this clinician.
Sources: Doctors and Clinicians National Downloadable File (CMS); and Clinician Public Reporting: Overall MIPS Performance (CMS), 2024 data, released September 10, 2026
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Dr. Christopher G. Tretter has 3 publications on record
Dmand AI links 3 papers to Dr. Tretter, published from 2014 to 2016. 2016 was the busiest year, with 2. Dr. Tretter has published most often in Clin Genitourin Cancer. Dr. Tretter's most frequent co-authors are Leonard Joseph Appleman, MD, Glenn Bubley, MD and Toni K. Choueiri, MD.
Papers3
Years published2014 to 2016
Dr. Tretter's most frequent co-authors
- Leonard Joseph Appleman, MD1 shared paper
- Glenn Bubley, MD1 shared paper
- Toni K. Choueiri, MD1 shared paper
Recent publications by Dr. Tretter
Clin Genitourin Cancer
Antineoplastic AgentsOrganoplatinum CompoundsTesticular Neoplasms
See who Dr. Tretter researches with
Physician Network Discovery turns co-authorship, shared hospitals and shared groups into a map of who Dr. Tretter 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. Christopher G. Tretter received $289 in industry payments from 2021 to 2023
CMS Open Payments shows 4 general payments to Dr. Tretter from 3 drug and device companies from 2021 to 2023. Education make up the largest share, 100% of the total. Seagen Inc. paid the most, $184.
General payments to Dr. Tretter by program year, 2021 to 2023
Companies that paid Dr. Tretter the most, 2021 to 2023
Share is of all general payments to this clinician.
Source: Open Payments (CMS), 2025 data, released July 7, 2026
Dr. Christopher G. Tretter graduated from McGill University, Faculty of Medicine
Dr. Tretter graduated from McGill University, Faculty of Medicine in 1994.
- Medical school
Source: Dmand AI Professional Profile Data
Sources for Dr. Christopher G. Tretter'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) |
| 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 Dr. Christopher G. Tretter
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. Christopher G. Tretter's NPI number?
Dr. Christopher G. Tretter's NPI number is 1083648133. It was assigned on July 11, 2006, and it is active in the NPI Registry.
What kind of doctor is Dr. Christopher G. Tretter?
Dr. Christopher G. Tretter is a hematologist and oncologist in Portland, Maine. The primary specialty in the NPI Registry is Hematology & Oncology Physician (taxonomy code 207RH0003X).
Where does Dr. Christopher G. Tretter practice?
Dr. Tretter practices at 22 Bramhall St, Portland, ME 04102. Dr. Tretter's primary practice is MaineHealth Maine Medical Center in Portland, Maine, part of MaineHealth. Dmand AI also links Dr. Tretter to 2 hospitals, 2 medical groups and 1 hospice.
What is Dr. Christopher G. Tretter's office phone number?
The practice phone on file for Dr. Tretter is (207) 662-0111.
What is Dr. Christopher G. Tretter's medical license number?
Dr. Tretter holds Maine license 27471, one of the licenses on file in 2 states.
Which states has Dr. Christopher G. Tretter been licensed in?
Dmand AI has state licenses on file for Dr. Tretter in Maine and Massachusetts.
Which hospitals is Dr. Christopher G. Tretter affiliated with?
Dr. Tretter practices at MaineHealth Maine Medical Center in Portland, Maine. Dr. Tretter is also affiliated with Beth Israel Deaconess Medical Center. Dmand AI links Dr. Tretter to 2 more hospitals.
What medical group is Dr. Christopher G. Tretter part of?
Dr. Tretter is linked to MaineHealth Primary Care - Family Medicine - Portland. Dmand AI links Dr. Tretter to 2 more medical groups.
Does Dr. Christopher G. Tretter accept Medicare?
Yes. CMS data shows Dr. Tretter billed Medicare for 321 services in 2024, and Dr. Tretter accepts Medicare assignment.
Does Dr. Christopher G. Tretter offer telehealth?
Yes. The CMS Doctors and Clinicians file lists Dr. Tretter as offering telehealth services.
Show 9 more questionsShow fewer questions
What is Dr. Christopher G. Tretter's MIPS score?
Dr. Tretter's MIPS final score for performance year 2024 is 98 out of 100, reported through an alternative payment model (APM).
How many Medicare patients does Dr. Christopher G. Tretter see?
CMS counts 88 Medicare patients who saw Dr. Tretter in 2024, with an average age of 75.
What services does Dr. Christopher G. Tretter bill to Medicare?
In 2024, Dr. Tretter's most billed Medicare services were office visit, established patient (99214), office visit, new patient (99205) and office visit, established patient (99215).
Where did Dr. Christopher G. Tretter go to medical school?
Dr. Tretter graduated from McGill University, Faculty of Medicine in 1994.
What drugs does Dr. Christopher G. Tretter prescribe most?
In 2024 Medicare Part D data, Dr. Tretter's most prescribed drugs by claims were Prednisone, Abiraterone Acetate and Prochlorperazine Maleate.
Has Dr. Christopher G. Tretter received payments from drug or device companies?
CMS Open Payments shows $289 in general payments to Dr. Tretter from 3 companies from 2021 to 2023. The largest total came from Seagen Inc.
How long has Dr. Christopher G. Tretter been practicing?
Dr. Tretter graduated from medical school in 1994, 32 years ago.
Does Dr. Christopher G. Tretter do research?
Dmand AI links 3 publications to Dr. Tretter, published from 2014 to 2016.
Who does Dr. Christopher G. Tretter publish with?
Dr. Tretter's most frequent co-authors are Leonard Joseph Appleman, MD (1 shared paper), Glenn Bubley, MD (1 shared paper) and Toni K. Choueiri, MD (1 shared paper).
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