DR. STUART S KASSAN (MD) – Rheumatology Physician, NPI 1093706475
Rheumatology Physician
Main info
Doctor Profile
Profile Insights
NPPES metrics only — not quality of care.
129 RHEUMATOLOGY in CO
Provider Addresses for DR. STUART S KASSAN (MD)
198 Union Blvd
Suite 150
Lakewood, CO 802282259
Phone: (303) 892-6033
Fax: (303) 573-6929
Type: Location
4200, West Conejos Place, West Colfax, Denver, Denver County, Colorado, 80204, United States
#314
DENVER, CO 802041333
Phone: (303) 892-6033
Fax: (303) 573-6929
Type: Mailing
198 UNION BLVD
SUITE 150
LAKEWOOD, CO 802282259
Phone: (303) 892-6033
Fax: (303) 573-6929
Type: Mailing
1400 JACKSON ST
DENVER, CO 802062762
Phone: (303) 388-4461
Fax: (303) 398-1211
Type: Mailing
NPPES updates history
No NPPES updates recorded for this provider.
Prescription Activity
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Open Payments (CMS)
CMS reports 1 Open Payments records for all available years, with a total value of $29.
Total Amount is formed as General ($29) + Research ($0) + Ownership ($0) = $29.
Last reported payment date: 2023-11-08 • Largest payer in this snapshot: ABBVIE INC. ($29).
Total Amount
$29
General + Research + Ownership
Payments
1
Total payment records
General Amount
$29
General payments
Research Amount
$0
Research funding
Ownership Amount
$0
Ownership interests
Ownership Count
0
Ownership records
Last Payment Date
2023-11-08
Latest reported date
Top Companies
Largest payers in this snapshot
| Company | Amount |
|---|---|
| ABBVIE INC. | $29 |
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: 2004-02-06
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 |
|---|---|---|---|---|
| I20040206000218 | I | Rheumatology | 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 |
|---|---|---|---|---|
| 99215 | Established patient office or other outpatient visit, 40-54 minutes | 330 | 187 | $0 |
| 99214 | Established patient office or other outpatient visit, 30-39 minutes | 121 | 94 | $0 |
Insurance plans in this area (ZIP 80228)
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Group practice members
| Name | Specialty | State |
|---|---|---|
| - | CO | |
| Nurse Practitioner | CO | |
| Diagnostic Radiology | CO | |
| - | CO | |
| - | CO | |
| Diagnostic Radiology | CO | |
| - | CO | |
| - | CO | |
| - | CO | |
| - | CO |
Reviews
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