DR. DENNIS ANDREW BUCK (DO) – Hematology & Oncology Physician, NPI 1114157195
Hematology & Oncology Physician
Main info
Doctor Profile
Contacts
Profile Insights
NPPES metrics only — not quality of care.
246 HEMATOLOGY/ONCOLOGY in CO
Loading map...
Provider Addresses for DR. DENNIS ANDREW BUCK (DO)
Mercado Street, Durango, La Plata County, Colorado, United States of America
DURANGO, CO 81301
Phone: (970) 385-7977
Fax: (970) 385-6727
Type: Location
2500 E HUNT DR STE H-J
SHOW LOW, AZ 859017954
Phone: (928) 537-6937
Fax: (928) 532-8798
Type: Mailing
10109 E. 79th Street
Tulsa, OK 74133
Phone: (918) 286-5000
Fax: (918) 249-7532
Type: Location
95 S Pagosa Blvd
Pagosa Springs, CO 811478329
Phone: (970) 731-3700
Fax: (970) 731-3707
Type: Location
1 Mercado St Ste 100
Durango, CO 81301
Phone: (970) 385-7977
Fax: (970) 385-6727
Type: Location
Beet Box, 1030, East 22nd Avenue, Five Points, Denver, Denver County, Colorado, 80205, United States
DENVER, CO 802911057
Phone: (800) 953-0104
Fax: (303) 765-6640
Type: Mailing
95 S PAGOSA BLVD
PAGOSA SPRINGS, CO 811478329
Phone: (970) 731-3700
Fax: (970) 731-3707
Type: Mailing
NPPES updates history
No NPPES updates recorded for this provider.
Prescription Activity
Loading prescription activity...
Open Payments (CMS)
CMS reports 14 Open Payments records for all available years, with a total value of $383.
Total Amount is formed as General ($383) + Research ($0) + Ownership ($0) = $383.
Last reported payment date: 2024-06-06 • Largest payer in this snapshot: ABBVIE INC. ($152).
Total Amount
$383
General + Research + Ownership
Payments
14
Total payment records
General Amount
$383
General payments
Research Amount
$0
Research funding
Ownership Amount
$0
Ownership interests
Ownership Count
0
Ownership records
Last Payment Date
2024-06-06
Latest reported date
Top Companies
Largest payers in this snapshot
| Company | Amount |
|---|---|
| ABBVIE INC. | $152 |
| Janssen Biotech, Inc. | $47 |
| Kyowa Kirin, Inc. | $39 |
| Celgene Corporation | $37 |
| Janssen Scientific Affairs, LLC | $33 |
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: 2025-11-18
PECOS data refreshed: 2026-05-27
Medicare revalidation (CMS due date list)
Due date not assigned yet
CMS is tracking 2 Medicare enrollment records; no due dates published yet.
Enrollment records
2
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 |
|---|---|---|---|---|
| I20240723001702 | I | Hematology/Oncology | MN | TBD |
| I20251118004116 | I | Hematology/Oncology | AZ | 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.
No Medicare fee-for-service utilization data available for this provider in our database.
Insurance plans in this area (ZIP 81301)
Loading plans...
Group practice members
| Name | Specialty | State |
|---|---|---|
| - | MN | |
| H E M A T O L O G Y/ O N C O L O G Y | ND | |
| - | MN | |
| - | MN | |
| - | MN | |
| Medical Oncology, Hematology/Oncology, Hospitalist, Internal Medicine, Hospice/Palliative Care | MO | |
| - | MN | |
| - | MN | |
| - | MN | |
| Internal Medicine, Hematology, Medical Oncology | MN |
Reviews
All reviews are moderated before publication. Reviews reflect users' opinions; we do not verify the accuracy of individual reviews.
No reviews yet. Be the first to share your experience — your opinion helps families compare providers.