Michael Maris, MD
NPI 1053395624 · Hematology & Oncology Physician · Denver, CO
Enrolled with Medicare as Practitioner - Hematopoietic Cell Transplantation and Cellular Therapy · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Michael Maris, MD is a Hematology & Oncology Physician provider in Denver, CO (NPI 1053395624).
Provider details
- NPI number
- 1053395624
- Entity type
- Individual
- Primary specialty
- Hematology & Oncology PhysicianAllopathic & Osteopathic Physicians
- Credential
- MD
- Sex
- Male
- Sole proprietor
- No
- License
- 43475 (CO)
Specialties & taxonomies
Allopathic & Osteopathic Physicians
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure25% of score
20 yrs in NPPES registry
- Profile completeness25% of score
100% of core fields populated
- Practice footprint15% of score
1 documented practice location
- Medicare service volume (vs. specialty peers)25% of score
1,212 Medicare services, 2024 (ranked within specialty)
- Open Payments transparency10% of score
Has Open Payments disclosures (2024)
Medicare volume is ranked against active providers in the same specialty. Signals a provider has no public data for (e.g. Medicare claims) are left out of the score entirely — never counted as zero — so providers without that data are not penalized. See the full formula and weights in our .
What this provider does (Medicare)
Based on Medicare fee-for-service claims, 2024; not all care is captured.
| Service (HCPCS) | Medicare services | Typical Medicare-allowed (2024) |
|---|---|---|
| Insertion of Needle Into Vein for Collection of Blood Sample36415 | 594 | $9 |
| Established Patient Office Or Other Outpatient Visit With High Level of Medical Decision Making, If Using Time, 40 Minutes Or More99215 | 215 | $175 |
| Administration of Non-Hormonal Anti-Neoplastic Chemotherapy Under Skin Or Into Muscle96401 | 96 | $72 |
| Infusion Into a Vein for Therapy, Prevention, Or Diagnosis, 1 Hour Or Less96365 | 79 | $63 |
| Infusion Into a Vein for Therapy, Prevention, Or Diagnosis, Each Additional Hour96366 | 70 | $20 |
| Administration of Chemotherapy Into Vein, 1 Hour Or Less96413 | 63 |
What this provider prescribes (Medicare Part D)
Top drugs by Medicare Part D claim volume, 2024 · 33 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Acyclovir | 91 | 24 |
| Ruxolitinib Phosphatebrand: Jakafi | 78 | 13 |
| Sulfamethoxazole/Trimethoprimbrand: Sulfamethoxazole-Trimethoprim | 70 | 19 |
| Valacyclovir Hclbrand: Valacyclovir | 63 | 18 |
| Pantoprazole Sodium | 38 | — |
| Ursodiol | 35 | — |
| Letermovirbrand: Prevymis | 34 |
Transparency — industry payments
Based on CMS Open Payments, 2024; not all care is captured.
$197 across 9 records (Open Payments 2024)
Open Payments discloses payments and transfers of value (meals, travel, consulting, research, royalties) from drug and device makers to providers. This is a transparency signal, not a verdict — such payments are legal and common, and their presence is neither an endorsement nor a criticism. Source: CMS Open Payments, program year 2024.
Practice location
Mailing address
Registry dates
- Enumerated
- 2005-12-06
- Last updated
- 2013-10-01
Frequently asked questions
- What is Michael Maris's NPI number?
- Michael Maris's National Provider Identifier (NPI) is 1053395624, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Michael Maris's specialty?
- Michael Maris is listed in the NPPES registry with a primary specialty of Hematology & Oncology Physician (Allopathic & Osteopathic Physicians).
- Where is Michael Maris located?
- Michael Maris's practice location on file with NPPES is 1800 Williams St, Denver, CO 80218-1238.
- What is Michael Maris's phone number?
- The practice phone number listed in the NPPES registry for Michael Maris is (720) 754-4800.
- Does Michael Maris accept Medicare?
- Michael Maris is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Michael Maris's NPI active?
- Yes — Michael Maris's NPI (1053395624) is active in the NPPES registry as of the last update on 2013-10-01.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.