Physician Profile
Christopher G. Tretter, MD
Unclaimed ProfileAbout Dr. Tretter
Christopher G. Tretter, MD is a healthcare provider in South Portland, ME specializing in hematology & oncology. Christopher trained at Mcgill University, Faculty of Medicine, graduating in 1994. Medicare claims data shows Christopher provided 321 services to 123 patients. The services billed most often include established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more, new patient office or other outpatient visit with a high level of medical decision making, if using time, 60 minutes or more, and established patient office or other outpatient visit with high level of medical decision making, if using time, 40 minutes or more.
Summarised automatically from public NPI registry and CMS Medicare data. Not written or reviewed by this provider. Claim this profile to replace it.
Education & Training
Specialty
Credentials & Licensing
License numbers are what the provider reported to NPPES when the NPI was issued or updated. NPPES does not verify licensure; confirm current standing with the state licensing board.
Medicare information
Exactly as CMS reports it (National Downloadable File, Opt-Out Affidavits, Order & Referring). Not an insurance directory; confirm coverage with the office.
Contact Information
- (207) 661-0200
- Email not available
Practice Locations
MAINEHEALTH CANCER CARE 265 WESTERN AVE SUITE 2
South Portland, ME 04106
Conditions Commonly Evaluated or Treated
Within Hematology and Oncology generally. Availability varies by clinician, training and location — this profile has not been claimed, so nothing here is a personal claim by the provider.
Conditions
Most searched conditions
- Anemia
- Blood clots
- Breast cancer
- Colon cancer
- Iron-deficiency anemia
- Leukemia
- Lung cancer
- Lymphoma
- Prostate cancer
Advanced Cancers
- Cancer That Has Spread
Blood & Lymph Disorders
- Enlarged spleen
- Swollen Lymph Nodes
Blood Cancers
- Multiple Myeloma
- Myelodysplastic Syndrome
Blood Disorders
- Bleeding Disorders
- Blood Clot in Lung
- Blood Clotting Gene Mutation
- Deep vein thrombosis
- Hemochromatosis
- High Platelet Count
- High White Blood Cell Count
- Low Platelets
- Low White Blood Cell Count
- Thick Blood
- Unexplained Bruising
Blood disorders
- Bone Marrow Scarring
- Hemolytic Anemia in Children
- Pre-Myeloma Protein In Blood
- Vitamin B12 deficiency anemia
Bone & Soft Tissue Cancers
- Bone tumors
- Soft-tissue sarcoma
Digestive Cancers
- Esophageal cancer
- Liver cancer
- Pancreatic cancer
- Stomach cancer
Endocrine Cancers
- Thyroid cancer
Endocrine tumors
- Neuroendocrine Tumors
Gastrointestinal cancer
- Anal cancer
- Appendix cancer
- Bile duct cancer
- Gallbladder cancer
General oncology
- Cancer of unknown primary
Genetic Blood Disorders
- Sickle cell disease
- Thalassemia
Gynecologic cancer
- Vulvar cancer
Gynecologic Cancers
- Cervical cancer
- Endometrial cancer
- Ovarian cancer
Head & Neck Cancers
- Oral cancer
Head and neck cancer
- Laryngeal cancer
- Oral cavity cancer
Neurologic Cancers
- Brain tumor
Oncologic emergencies
- High calcium from cancer
Ophthalmologic oncology
- Melanoma of the eye
Skin cancer
- Skin cancer
Skin Cancers
- Melanoma
Urologic Cancers
- Bladder cancer
- Kidney cancer
- Testicular cancer
Procedures & services
Most searched procedures
- Blood transfusion
- Chemotherapy
- Immunotherapy
- Targeted therapy
Biopsies & Diagnostics
- Bone Marrow Biopsy
- Lumbar puncture
- Lymph Node Biopsy
Blood disorder care
- Blood Exchange Transfusion
- Photopheresis
Cancer Therapies
- Hormone Therapy For Cancer
Cancer therapy
- Chemo allergy desensitization
- Oral chemotherapy management
- Radiation oncology consultation
- Spinal chemo injection
Cellular Therapies
- CAR-T Therapy
- Stem Cell Transplant
Consultations
- Cancer Survivorship Care Plan
- Clinical Trial Screening
- Second Opinion For Cancer
Diagnostic testing
- Circulating tumor cell test
Hematology Treatments
- Blood Clot Management
- Plasmapheresis
- PRP Injection
- Therapeutic Blood Draw
Imaging
- PET Scan
Infusions
- Clotting Factor Replacement
- Iron Infusion
- IV fluids
- IVIG Infusion
Interventional oncology
- Radiofrequency ablation
- TACE Chemoembolization
Supportive Cancer Care
- Bone Strengthening Injections For Cancer
- Pain Management For Cancer
- Red Blood Cell Booster Shot
- White Blood Cell Booster Injection
Supportive cancer care
- Cancer nutrition counseling
- Chemo brain treatment
- Cold cap therapy for hair loss
- Fertility Preservation for Teens Before Cancer Treatment
- Hyperbaric oxygen for radiation damage
- Lymphedema Drainage Therapy
- Palliative cancer care
Surgical & Vascular Access
- Chemo port placement
- Chemo port removal
- Draining lung fluid
- Paracentesis
- PICC line placement coordination
Testing & Genetics
- Cancer Genetic Testing
- Cancer Tumor Profiling
- Liquid Biopsy
Vascular access care
- Chemo port check
- Chemo Port Flush And Maintenance
- PICC line dressing change
Procedures Most Often Billed to Medicare
321 services · 123 patients · 3 distinct codes
| Procedure | Type | Code | Services | Compared with peers |
|---|---|---|---|---|
| Established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more | Office visit | 99214 |
249 | As often as other peers in Hematology & Oncology |
| New patient office or other outpatient visit with a high level of medical decision making, if using time, 60 minutes or more | Office visit | 99205 |
38 | More often than most peers in Hematology & Oncology |
| Established patient office or other outpatient visit with high level of medical decision making, if using time, 40 minutes or more | Office visit | 99215 |
34 |
Source: CMS Medicare public data. Shows how often procedures were billed — not quality of care or patient satisfaction.
Related providers
Connections drawn from the registry and from what providers have told us. A link here is not a referral or an endorsement.
Other cancer specialists in South Portland 8
Same specialty, same city.
Class of 1994 at Mcgill University, Faculty of Medicine 1
Providers who graduated from the same medical school in the same year.
Common questions
What does Dr. Tretter specialize in?
Dr. Tretter is a cancer specialist in South Portland, ME. That is the designation recorded for this NPI in the federal registry, where it is listed as “Hematology & Oncology”.
NPI registry
Where is Dr. Tretter located?
Dr. Tretter is listed at Mainehealth Cancer Care 265 Western Ave Suite 2, South Portland, ME 04106. Addresses come from the NPI registry and can lag a move, so confirm before travelling.
NPI registry
What is Dr. Tretter's phone number?
The number on file is (207) 661-0200. Guide.md cannot book appointments or pass on messages — please call the office directly.
NPI registry
What is the NPI for Dr. Tretter?
Dr. Tretter's National Provider Identifier is 1083648133. It is issued by the Centers for Medicare & Medicaid Services and is unique and permanent — it does not change if they move practice.
NPI registry
Where did Dr. Tretter go to medical school?
Dr. Tretter attended Mcgill University, Faculty of Medicine, graduating in 1994. This comes from the CMS National Downloadable File.
CMS public data
How much experience does Dr. Tretter have?
Dr. Tretter has 32 years experience. Calculated from a graduation year of 1994, reported in the CMS National Downloadable File.
CMS public data
What does Dr. Tretter do most often?
According to Medicare billing data, Dr. Tretter the Medicare record under this individual NPI shows mainly office visits and diagnostic testing. Hospital-based physicians usually have their procedural work billed by the facility rather than under their own number, so this is a floor on their practice, not a description of it. This reflects Medicare patients only and is billing volume, not a measure of quality.
Medicare claims
Is Dr. Tretter's profile verified?
Not yet. This profile is built from public federal data and has not been confirmed by Dr. Tretter. If this is you, claiming it is free.
Guide.md
Provider data sourced from the NPPES NPI Registry and CMS public datasets. Information is provided for reference and is not medical advice.