NICHOLAS JUNHYUK AHN (M.D.) – Surgery Physician, NPI 1912341447
Surgery Physician
Main info
Doctor Profile
Profile Insights
NPPES metrics only — not quality of care.
275 COLORECTAL SURGERY (PROCTOLOGY) in NY
Provider Addresses for NICHOLAS JUNHYUK AHN (M.D.)
47 NEW SCOTLAND AVE
DEPARTMENT OF SURGERY
ALBANY, NY 122083412
Phone:
Type: Mailing
HEALTH SCIENCE TOWER LEVEL 18, ROOM 051
STONY BROOK, NY 117948191
Phone: (631) 444-2704
Fax: (631) 444-7784
Type: Mailing
47 New Scotland Ave
Department of Surgery
Albany, NY 122083412
Phone: (518) 262-5374
Type: Location
HEALTH SCIENCE TOWER LEVEL 19, ROOM 030
STONY BROOK, NY 117943412
Phone: (631) 444-1791
Type: Location
NPPES updates history
No NPPES updates recorded for this provider.
Prescription Activity
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Open Payments (CMS)
CMS reports 16 Open Payments records for all available years, with a total value of $1,094.
Total Amount is formed as General ($1,094) + Research ($0) + Ownership ($0) = $1,094.
Last reported payment date: 2024-11-14 • Largest payer in this snapshot: Medtronic, Inc. ($351).
Total Amount
$1,094
General + Research + Ownership
Payments
16
Total payment records
General Amount
$1,094
General payments
Research Amount
$0
Research funding
Ownership Amount
$0
Ownership interests
Ownership Count
0
Ownership records
Last Payment Date
2024-11-14
Latest reported date
Top Companies
Largest payers in this snapshot
| Company | Amount |
|---|---|
| Medtronic, Inc. | $351 |
| THD America, Inc. | $175 |
| Galvanize Therapeutics, Inc | $144 |
| Virtual Incision Corporation | $140 |
| Olympus Corporation of the Americas | $101 |
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: 2021-09-20
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 |
|---|---|---|---|---|
| I20210920003281 | I | Colorectal Surgery (Proctology) | NY | 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 |
|---|---|---|---|---|
| 99203 | New patient office or other outpatient visit, 30-44 minutes | 91 | 91 | $0 |
| 99213 | Established patient office or other outpatient visit, 20-29 minutes | 45 | 30 | $0 |
| 46600 | Diagnostic exam of anus using an endoscope | 37 | 32 | $0 |
| 45380 | Biopsy of large bowel using a flexible endoscope | 30 | 30 | $0 |
| 45385 | Removal of polyps or growths of large bowel using an endoscope with mechanical snare | 28 | 27 | $0 |
Insurance plans in this area (ZIP 12208)
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Group practice members
| Name | Specialty | State |
|---|---|---|
| - | NY | |
| Plastic And Reconstructive Surgery | NY | |
| General Surgery, Critical Care (Intensivists) | NY | |
| General Surgery, Surgical Oncology | NY | |
| Vascular Surgery | IL | |
| Critical Care (Intensivists), General Surgery | NY | |
| Nurse Practitioner | NY | |
| Colorectal Surgery (Proctology), General Surgery | NY | |
| Physician Assistant | NY | |
| - | NY |
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