MR. GUY P VAN DER WERF (MD) – Family Medicine Physician, NPI 1538154257
Family Medicine Physician
Main info
Doctor Profile
Profile Insights
NPPES metrics only — not quality of care.
2,661 FAMILY PRACTICE in CO
Provider Addresses for MR. GUY P VAN DER WERF (MD)
Estes Park Medical Center, 555, Prospect Avenue, Estes Park, Larimer County, Colorado, 80517, United States
ESTES PARK, CO 805176312
Phone: (970) 586-2200
Fax: (970) 577-4536
Type: Mailing
131 STANLEY AVE STE 202
ESTES PARK, CO 805176356
Phone: (970) 586-2344
Fax: (970) 586-9060
Type: Location
NPPES updates history
No NPPES updates recorded for this provider.
Prescription Activity
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Open Payments (CMS)
No Open Payments data available for this provider.
This can happen when there are no reportable CMS Open Payments records.
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: 2005-05-25
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 |
|---|---|---|---|---|
| I20050525001019 | I | Family Practice | 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 |
|---|---|---|---|---|
| 99213 | Established patient office or other outpatient visit, 20-29 minutes | 403 | 275 | $0 |
| 99214 | Established patient office or other outpatient visit, 30-39 minutes | 377 | 246 | $0 |
| 36415 | Insertion of needle into vein for collection of blood sample | 311 | 238 | $0 |
| G0439 | Annual wellness visit, includes a personalized prevention plan of service (pps), subsequent visit | 185 | 185 | $0 |
| G0444 | Annual depression screening, 5 to 15 minutes | 80 | 80 | $0 |
Insurance plans in this area (ZIP 80517)
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Group practice members
| Name | Specialty | State |
|---|---|---|
| Pulmonary Disease | CO | |
| - | CO | |
| - | CO | |
| - | MO | |
| O T O L A R Y N G O L O G Y | CO | |
| Physician Assistant | CO | |
| - | CO | |
| Physician Assistant | CO | |
| Physician Assistant | CO | |
| Nurse Practitioner | CO |
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