DR. NATHAN JOSEPH LANDESMAN (D.O.) – Internal Medicine Physician, NPI 1457397143
Internal Medicine Physician
Main info
Doctor Profile
Profile Insights
NPPES metrics only — not quality of care.
648 GASTROENTEROLOGY in MI
Provider Addresses for DR. NATHAN JOSEPH LANDESMAN (D.O.)
600 HEALTH PARK BLVD STE D
GRAND BLANC, MI 484392558
Phone: (810) 603-8400
Fax: (810) 603-8410
Type: Mailing
1535, Gull Road, Charter Township of Comstock, Kalamazoo County, Michigan, 49001, United States
SUITE 105
KALAMAZOO, MI 490481650
Phone: (269) 385-9900
Fax: (269) 385-2140
Type: Mailing
NPPES updates history
No NPPES updates recorded for this provider.
Prescription Activity
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Open Payments (CMS)
CMS reports 99 Open Payments records for all available years, with a total value of $2,895.
Total Amount is formed as General ($2,895) + Research ($0) + Ownership ($0) = $2,895.
Last reported payment date: 2024-12-18 • Largest payer in this snapshot: GENZYME CORPORATION ($1,343).
Total Amount
$2,895
General + Research + Ownership
Payments
99
Total payment records
General Amount
$2,895
General payments
Research Amount
$0
Research funding
Ownership Amount
$0
Ownership interests
Ownership Count
0
Ownership records
Last Payment Date
2024-12-18
Latest reported date
Top Companies
Largest payers in this snapshot
| Company | Amount |
|---|---|
| GENZYME CORPORATION | $1,343 |
| ABBVIE INC. | $543 |
| Salix Pharmaceuticals, a division of Bausch Health US, LLC | $251 |
| E.R. Squibb & Sons, L.L.C. | $100 |
| PFIZER INC. | $84 |
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: 2006-12-06
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 |
|---|---|---|---|---|
| I20061206000563 | I | Gastroenterology | MI | 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 |
|---|---|---|---|---|
| 45385 | Removal of polyps or growths of large bowel using an endoscope with mechanical snare | 78 | 78 | $0 |
| 43239 | Biopsy of esophagus, stomach, and/or upper small bowel using a flexible endoscope | 74 | 69 | $0 |
| 99232 | Subsequent hospital care with moderate levelof medical decision making, if using time, at least 35 minutes | 70 | 51 | $0 |
| 99222 | Initial hospital care with straightforward or low-level medical decision making, if using time, at least 55 minutes | 62 | 59 | $0 |
| 99214 | Established patient office or other outpatient visit, 30-39 minutes | 50 | 39 | $0 |
Insurance plans in this area (ZIP 48439)
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Group practice members
| Name | Specialty | State |
|---|---|---|
| Certified Registered Nurse Anesthetist (Crna) | MI | |
| Certified Registered Nurse Anesthetist (Crna) | MI | |
| - | MI | |
| - | MI | |
| Family Practice | MI | |
| Certified Registered Nurse Anesthetist (Crna) | MI | |
| Certified Registered Nurse Anesthetist (Crna) | MI | |
| Certified Registered Nurse Anesthetist (Crna) | MI | |
| - | MI | |
| Certified Registered Nurse Anesthetist (Crna) | MI |
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