MARK ANTHONY SITARIK (MD) – Hematology & Oncology Physician, NPI 1346224664
Hematology & Oncology Physician
Main info
Doctor Profile
Profile Insights
NPPES metrics only — not quality of care.
2,996 INTERNAL MEDICINE in CO
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Provider Addresses for MARK ANTHONY SITARIK (MD)
East Maplewood Avenue, Greenwood Village, Arapahoe County, Colorado, 80111, United States
GREENWOOD VILLAGE, CO 801114723
Phone: (303) 930-7800
Fax: (303) 930-7860
Type: Mailing
Arapahoe Avenue, Boulder, Boulder County, Colorado, 80303-1229, United States
BOULDER, CO 803031385
Phone: (303) 385-2000
Fax: (303) 444-1839
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.
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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: 2009-12-01
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 |
|---|---|---|---|---|
| I20091201000492 | I | Hematology/Oncology | 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 |
|---|---|---|---|---|
| Q0138 | Injection, ferumoxytol, for treatment of iron deficiency anemia, 1 mg (non-esrd use) | 8,670 | 13 | $0 |
| J9144 | Injection, daratumumab, 10 mg and hyaluronidase-fihj | 6,840 | 17 | $0 |
| J1453 | Injection, fosaprepitant, 1 mg | 5,550 | 23 | $0 |
| J1756 | Injection, iron sucrose, 1 mg | 4,400 | 17 | $0 |
| J1568 | Injection, immune globulin, (octagam), intravenous, non-lyophilized (e.g., liquid), 500 mg | 2,130 | 16 | $0 |
Insurance plans in this area (ZIP 80111)
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Provider's Procedures
| Specialty | Practice State | HCPCS Code | Description | Service Count | Beneficiary Count |
|---|---|---|---|---|---|
| HEMATOLOGY/ONCOLOGY | CO | 96367 | Infusion into a vein for therapy prevention or diagnosis additional sequential infusion up to 1 hour | 86 | 38 |
| HEMATOLOGY/ONCOLOGY | CO | 96375 | Injection of different drug or substance into a vein for therapy, diagnosis, or prevention | 196 | 65 |
| HEMATOLOGY/ONCOLOGY | CO | 96415 | Infusion of chemotherapy into a vein | 65 | 30 |
Group practice members
| Name | Specialty | State |
|---|---|---|
| Nurse Practitioner | OH | |
| Physician Assistant | CO | |
| H E M A T O L O G Y/ O N C O L O G Y | CO | |
| Radiation Oncology | CO | |
| Medical Oncology, Hematology/Oncology | CO | |
| - | CO | |
| Internal Medicine, Medical Oncology | CO | |
| Physician Assistant | CO | |
| Medical Oncology | MO | |
| - | CO |
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