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Edit this profileAt a glance
- 1500 E Medical Center Dr, Ann Arbor, MI 48109
About Dr. Maciejewski
John J. Maciejewski, M.D. is a healthcare provider in Ann Arbor, MI specializing in hematology. John trained at R Franklin University of Med & Sci/Chicago Medical School, graduating in 2001. John is also listed as specializing in internal medicine and hematology & oncology. Medicare claims data shows John provided 413 services to 104 patients. The services billed most often include subsequent hospital care with moderate levelof medical decision making, if using time, at least 50 minutes, established patient office or other outpatient visit with high level of medical decision making, if using time, 40 minutes or more, and visit complexity inherent to evaluation and management associated with medical care services that serve as the continuing focal point for all needed health care services and/or with medical care services that are part of ongoing care related to a patient'. This provider record is associated with NPI 1235334137.
Factual summary compiled by Guide.md from public records; not written by this provider.
Education & Training
Specialty
Credentials & Licensing
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
- (734) 936-4000
- Email not available
Practice Locations
1500 E MEDICAL CENTER DR
Ann Arbor, MI 48109
Conditions Commonly Evaluated or Treated
Within Hematology 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
Anemia
Bleeding disorders
- Bleeding Disorders
- Frequent Unexplained Nosebleeds
- Heavy Period Bleeding From Bleeding Disorder
- Unexplained Bruising
Blood and immune disorders
Blood cancer
Blood clots
Bone marrow disorders
Clotting disorders
Inherited blood disorders
Iron disorders
Lymph conditions
Lymph disorders
Metabolic blood disorders
Nutritional blood disorders
Organ conditions
Platelet disorders
Protein disorders
Red blood cell disorders
- Cold-Triggered Blood Breakdown
- Hemolytic Anemia in Children
- Nighttime Red Blood Cell Breakdown
- Sickle cell disease
- Thalassemia
- Thick Blood
White blood cell disorders
Procedures & services
Most searched procedures
Biopsy
Blood treatments
- Blood Exchange Transfusion
- Plasmapheresis
- Platelet Removal Procedure
- Therapeutic Blood Draw
- White Blood Cell Removal Procedure
Catheter care
Cell therapy
Cellular therapy
Consultation
Consultations
Diagnostic tests
- Clotting Inhibitor Mixing Study
- Complete Blood Count
- Factor Level Blood Test
- Folic Acid Blood Test
- G6PD Enzyme Test
- Iron Level Blood Test
Infusions
Injections
Lab tests
- Blood Cancer Cell Marker Test
- Blood Clotting Tests
- Blood Smear Examination
- Coomb's Test
- Genetic Blood Clotting Test
- Hemoglobin Electrophoresis
- Myeloma Blood Protein Test
Medication management
Monitoring
Patient education
Procedures
Transfusion therapy
Transplants
Treatments
Procedures Most Often Billed to Medicare
413 services · 104 patients · 5 distinct codes
| Procedure | Type | Code | Services | Compared with peers |
|---|---|---|---|---|
| Subsequent hospital care with moderate levelof medical decision making, if using time, at least 50 minutes | Office visit | 99233 |
258 | More than most peers in Hematology |
| Established patient office or other outpatient visit with high level of medical decision making, if using time, 40 minutes or more | Office visit | 99215 |
91 | As often as other peers in Hematology |
| Visit complexity inherent to evaluation and management associated with medical care services that serve as the continuing focal point for all needed health care services and/or with medical care services that are part of ongoing care related to a patient' | Billing code | G2211 |
35 | Less often than most peers in Hematology |
| Initial hospital care with moderate level of medical decision making, if using time, at least 75 minutes | Office visit | 99223 |
16 | Less often than most peers in Hematology |
| Hospital discharge day management, more than 30 minutes | Office visit | 99239 |
13 | Less often than most peers in Hematology |
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.
Also at this address 4
Providers at the same street address. Each files their own registry entry, so a shared practice often appears under several different names.
Other hematology specialists in Ann Arbor 8
Same specialty, same city.
Trained at R Franklin University of Med & Sci/Chicago Medical School 3
Other providers in the same specialty who trained at the same institution.
More connections — 8 related providers in 1 group
Class of 2001 at R Franklin University of Med & Sci/Chicago Medical School 8
Providers who graduated from the same medical school in the same year.
Common questions
What kind of doctor is John J. Maciejewski?
John J. Maciejewski is a hematology in Ann Arbor, MI. That is the designation recorded for this NPI in the federal registry.
NPI registry
What is John J. Maciejewski's address?
John J. Maciejewski is listed at 1500 E Medical Center Dr, Ann Arbor, MI 48109. Addresses come from the NPI registry and can lag a move, so confirm before travelling.
NPI registry
How can I make an appointment with John J. Maciejewski?
The number on file is (734) 936-4000. Contact the office directly to confirm availability and scheduling.
NPI registry
What is the NPI for John J. Maciejewski?
John J. Maciejewski's National Provider Identifier is 1235334137. 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 John J. Maciejewski train?
John J. Maciejewski attended R Franklin University of Med & Sci/Chicago Medical School, graduating in 2001. This comes from the CMS National Downloadable File.
CMS public data
How much experience does John J. Maciejewski have?
John J. Maciejewski has 25 years experience. Calculated from a graduation year of 2001, reported in the CMS National Downloadable File.
CMS public data
What procedures does John J. Maciejewski perform?
According to Medicare billing data, John J. Maciejewski 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 John J. Maciejewski's profile verified?
Not yet. This profile is built from public federal data and has not been confirmed by John J. Maciejewski. If this is you, claiming it is free.
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