ANNA B SIHON (LCSW) – Clinical Social Worker, NPI 1417012659
Clinical Social Worker
Main info
Doctor Profile
Contacts
Profile Insights
NPPES metrics only — not quality of care.
2,023 CLINICAL SOCIAL WORKER in VA
Provider Addresses for ANNA B SIHON (LCSW)
1311 DOLLEY MADISON BLVD BLDG A
MC LEAN, VA 221013937
Phone: (571) 589-4042
Type: Mailing
4809 Argonne St Ste 100
Denver, CO 802496835
Phone: (303) 344-8700
Type: Location
9695 S Yosemite St Ste 224
Lone Tree, CO 801242890
Phone: (303) 265-3970
Fax: (303) 265-3971
Type: Location
4601 Corbett Dr
Fort Collins, CO 805289579
Phone: (970) 207-4857
Fax: (970) 207-4885
Type: Location
2695 ROCKY MOUNTAIN AVE STE 150
LOVELAND, CO 805389071
Phone: (970) 624-4128
Type: Mailing
9620 E ARAPAHOE RD
GREENWOOD VILLAGE, CO 801123703
Phone: (303) 835-9915
Fax: (303) 320-5399
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: 2012-05-17
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 |
|---|---|---|---|---|
| I20120517000530 | I | Clinical Social Worker | 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.
No Medicare fee-for-service utilization data available for this provider in our database.
Insurance plans in this area (ZIP 22101)
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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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