DOUGLAS M REZNICK (MD) – Hematology & Oncology Physician, NPI 1124002456
Hematology & Oncology Physician
Main info
Doctor Profile
Profile Insights
NPPES metrics only — not quality of care.
141 MEDICAL ONCOLOGY in CO
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Provider Addresses for DOUGLAS M REZNICK (MD)
East Maplewood Avenue, Greenwood Village, Arapahoe County, Colorado, 80111, United States
STE 300
GREENWOOD VILLAGE, CO 80111
Phone: (303) 930-7800
Fax: (303) 930-7860
Type: Mailing
Directions Parker Endocrinology, 9397, Crown Crest Boulevard, Parker, Douglas County, Colorado, 80138, United States
STE 421
PARKER, CO 80138
Phone: (303) 805-7744
Fax: (720) 851-4141
Type: Location
7951 E MAPLEWOOD AVE STE 350
GREENWOOD VILLAGE, CO 801114758
Phone: (303) 930-7895
Fax: (832) 601-6018
Type: Mailing
1700 S POTOMAC ST
AURORA, CO 800125405
Phone: (303) 418-7600
Fax: (303) 750-3137
Type: Location
NPPES updates history
No NPPES updates recorded for this provider.
Prescription Activity
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Open Payments (CMS)
CMS reports 28 Open Payments records for all available years, with a total value of $17,434.
Total Amount is formed as General ($17,434) + Research ($0) + Ownership ($0) = $17,434.
Last reported payment date: 2024-12-11 • Largest payer in this snapshot: AstraZeneca Pharmaceuticals LP ($15,467).
Total Amount
$17,434
General + Research + Ownership
Payments
28
Total payment records
General Amount
$17,434
General payments
Research Amount
$0
Research funding
Ownership Amount
$0
Ownership interests
Ownership Count
0
Ownership records
Last Payment Date
2024-12-11
Latest reported date
Top Companies
Largest payers in this snapshot
| Company | Amount |
|---|---|
| AstraZeneca Pharmaceuticals LP | $15,467 |
| Takeda Pharmaceuticals U.S.A., Inc. | $1,625 |
| TACTILE SYSTEMS TECHNOLOGY INC | $168 |
| Exelixis Inc. | $40 |
| Astellas Pharma US Inc | $35 |
Medicare Enrollment & Revalidation
Source: CMS public data · Not endorsed by CMS ·
Educational use only—not medical, billing, or legal advice.
PECOS enrollment status
Participating (accepts Medicare assignment)
Enrollment effective: 2004-03-18
PECOS data refreshed: 2026-05-27
Medicare revalidation (CMS due date list)
Due date not assigned yet
CMS is tracking this Medicare enrollment for revalidation, but has not published a due date.
Enrollment records
1
Earliest due date
Not assigned (TBD)
CMS data updated
2026-06-01
Revalidation progress
- Medicare enrolled
- On CMS revalidation list
- Due date assigned
- Revalidate in PECOS
CMS enrollment records
| Enrollment ID | Type | Specialty | State | Due date |
|---|---|---|---|---|
| I20040318001199 | I | Medical Oncology | CO | TBD |
What to do next
- No action required while the due date shows TBD.
- Check the CMS Revalidation Lookup Tool periodically — CMS updates the list about every 60 days.
- Do not submit a revalidation application in PECOS until CMS publishes a concrete due date.
Prepare CMS-855 application → · Look up this NPI in PECOS → · Verify on CMS PECOS
Medicare Utilization (FFS)
Source: CMS public data · Not endorsed by CMS · Beneficiary counts under 11 are suppressed in source data ·
Educational use only—not medical, billing, or legal advice.
Top Medicare procedures (2023) · refreshed 2026-05-27
| HCPCS | Description | Services | Beneficiaries | Medicare allowed |
|---|---|---|---|---|
| J0881 | Injection, darbepoetin alfa, 1 microgram (non-esrd use) | 15,570 | 15 | $0 |
| J1756 | Injection, iron sucrose, 1 mg | 13,400 | 32 | $0 |
| Q5101 | Injection, filgrastim-sndz, biosimilar, (zarxio), 1 microgram | 12,300 | 15 | $0 |
| J9271 | Injection, pembrolizumab, 1 mg | 10,800 | 21 | $0 |
| Q0138 | Injection, ferumoxytol, for treatment of iron deficiency anemia, 1 mg (non-esrd use) | 8,670 | 12 | $0 |
Insurance plans in this area (ZIP 80111)
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Provider's Procedures
| Specialty | Practice State | HCPCS Code | Description | Service Count | Beneficiary Count |
|---|---|---|---|---|---|
| MEDICAL ONCOLOGY | CO | 96375 | Injection of different drug or substance into a vein for therapy, diagnosis, or prevention | 48 | 26 |
Group practice members
| Name | Specialty | State |
|---|---|---|
| Physician Assistant | CO | |
| H E M A T O L O G Y/ O N C O L O G Y | CO | |
| Radiation Oncology | CO | |
| Medical Oncology, Hematology/Oncology | CO | |
| - | CO | |
| Internal Medicine, Medical Oncology | CO | |
| Physician Assistant | CO | |
| Medical Oncology | MO | |
| - | CO | |
| Nurse Practitioner | CO |
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