DR. MARK ROSENBLATT (M.D.) – Gastroenterology Physician, NPI 1851375455
Gastroenterology Physician
Main info
Doctor Profile
Profile Insights
NPPES metrics only — not quality of care.
70 GASTROENTEROLOGY in HI
Provider Addresses for DR. MARK ROSENBLATT (M.D.)
Mountain View Avenue, Longmont, Boulder County, Colorado, 80501, United States
LONGMONT, CO 80501
Phone: (303) 776-1234
Fax: (720) 494-3107
Type: Mailing
221 Mahalani St
Wailuku, HI 967932526
Phone: (808) 244-9056
Fax: (855) 827-2321
Type: Location
85 MAUI LANI PKWY
WAILUKU, HI 967932416
Phone: (808) 442-5700
Fax: (855) 827-2321
Type: Mailing
Longmont Clinic, 1925, Mountain View Avenue, Longmont, Boulder County, Colorado, 80501, United States
LONGMONT, CO 805013128
Phone: (303) 776-1234
Fax: (720) 494-3107
Type: Location
NPPES updates history
No NPPES updates recorded for this provider.
Prescription Activity
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Open Payments (CMS)
CMS reports 11 Open Payments records for all available years, with a total value of $668.
Total Amount is formed as General ($668) + Research ($0) + Ownership ($0) = $668.
Last reported payment date: 2024-02-21 • Largest payer in this snapshot: Boston Scientific Corporation ($349).
Total Amount
$668
General + Research + Ownership
Payments
11
Total payment records
General Amount
$668
General payments
Research Amount
$0
Research funding
Ownership Amount
$0
Ownership interests
Ownership Count
0
Ownership records
Last Payment Date
2024-02-21
Latest reported date
Top Companies
Largest payers in this snapshot
| Company | Amount |
|---|---|
| Boston Scientific Corporation | $349 |
| Endogastric Solutions, Inc | $159 |
| OMEGA MEDICAL IMAGING, LLC | $110 |
| CONMED Corporation | $50 |
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: 2025-09-24
PECOS data refreshed: 2026-05-27
Medicare revalidation (CMS due date list)
Past revalidation due date
Earliest CMS due date was 2023-07-31 (1045 days ago).
Enrollment records
2
Earliest due date
2023-07-31
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 |
|---|---|---|---|---|
| I20040712000857 | I | Gastroenterology | CO | 2023-07-31 |
| I20250924003573 | I | Gastroenterology | HI | TBD |
What to do next
- Verify current status on the CMS Revalidation Lookup Tool immediately.
- Complete revalidation in PECOS or contact your Medicare Administrative Contractor (MAC).
- Overdue revalidation can lead to deactivation of Medicare billing privileges.
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 |
|---|---|---|---|---|
| 43239 | Biopsy of esophagus, stomach, and/or upper small bowel using a flexible endoscope | 99 | 95 | $0 |
| 45380 | Biopsy of large bowel using a flexible endoscope | 59 | 58 | $0 |
| 99215 | Established patient office or other outpatient visit, 40-54 minutes | 43 | 40 | $0 |
| 36415 | Insertion of needle into vein for collection of blood sample | 33 | 24 | $0 |
| 45385 | Removal of polyps or growths of large bowel using an endoscope with mechanical snare | 29 | 29 | $0 |
Insurance plans in this area (ZIP 80501)
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Provider's Procedures
| Specialty | Practice State | HCPCS Code | Description | Service Count | Beneficiary Count |
|---|---|---|---|---|---|
| GASTROENTEROLOGY | CO | 43235 | Diagnostic examination of esophagus, stomach, and/or upper small bowel using an endoscope | 21 | 21 |
Group practice members
| Name | Specialty | State |
|---|---|---|
| H E M A T O L O G Y/ O N C O L O G Y | WA | |
| G A S T R O E N T E R O L O G Y | OR | |
| Emergency Medicine | CA | |
| Pulmonary Disease | FL | |
| P S Y C H I A T R Y | WA | |
| Emergency Medicine | HI | |
| Nurse Practitioner | NC | |
| Internal Medicine, Critical Care (Intensivists) | HI | |
| - | HI | |
| Internal Medicine, Pulmonary Disease | HI |
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