MARK N DURKAN (MD) – Gastroenterology Physician, NPI 1992801781
Gastroenterology Physician
Main info
Doctor Profile
Profile Insights
NPPES metrics only — not quality of care.
369 GASTROENTEROLOGY in CO
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Provider Addresses for MARK N DURKAN (MD)
3702, South Timberline Road, Peachtree, Fort Collins, Larimer County, Colorado, 80525, United States
FORT COLLINS, CO 805253624
Phone: (970) 207-9773
Fax: (970) 207-1893
Mailing address matches the actual address.
NPPES updates history
No NPPES updates recorded for this provider.
Prescription Activity
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Open Payments (CMS)
CMS reports 27 Open Payments records for all available years, with a total value of $539.
Total Amount is formed as General ($539) + Research ($0) + Ownership ($0) = $539.
Last reported payment date: 2024-12-19 • Largest payer in this snapshot: Celgene Corporation ($98).
Total Amount
$539
General + Research + Ownership
Payments
27
Total payment records
General Amount
$539
General payments
Research Amount
$0
Research funding
Ownership Amount
$0
Ownership interests
Ownership Count
0
Ownership records
Last Payment Date
2024-12-19
Latest reported date
Top Companies
Largest payers in this snapshot
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: 2006-01-26
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 |
|---|---|---|---|---|
| I20060126000810 | I | Gastroenterology | 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 |
|---|---|---|---|---|
| 88305 | Pathology examination of tissue using a microscope, intermediate complexity | 731 | 308 | $0 |
| 45385 | Removal of polyps or growths of large bowel using an endoscope with mechanical snare | 245 | 243 | $0 |
| 45380 | Biopsy of large bowel using a flexible endoscope | 125 | 124 | $0 |
| 43239 | Biopsy of esophagus, stomach, and/or upper small bowel using a flexible endoscope | 105 | 103 | $0 |
| 99232 | Subsequent hospital care with moderate levelof medical decision making, if using time, at least 35 minutes | 69 | 38 | $0 |
Insurance plans in this area (ZIP 80525)
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Group practice members
| Name | Specialty | State |
|---|---|---|
| Physician Assistant | CO | |
| Certified Registered Nurse Anesthetist (Crna) | CO | |
| G A S T R O E N T E R O L O G Y | CO | |
| Certified Registered Nurse Anesthetist (Crna) | CO | |
| G A S T R O E N T E R O L O G Y | CO | |
| Internal Medicine, Gastroenterology | MI | |
| Certified Registered Nurse Anesthetist (Crna) | CO | |
| G A S T R O E N T E R O L O G Y | CO | |
| Certified Registered Nurse Anesthetist (Crna) | CO | |
| Certified Registered Nurse Anesthetist (Crna) | CO |
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