GARY W AHN (MD) – Sports Medicine (Internal Medicine) Physician, NPI 1639260441
Sports Medicine (Internal Medicine) Physician
Main info
Doctor Profile
Profile Insights
NPPES metrics only — not quality of care.
199 HOSPITALIST in HI
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Provider Addresses for GARY W AHN (MD)
838, South Beretania Street, Makiki Kai, Honolulu, Honolulu County, Hawaii, 96813, United States
SUITE 307
HONOLULU, HI 968132524
Phone: (808) 547-4600
Fax: (808) 547-4559
Type: Mailing
Island Watersports Hawaii, 377, Keahole Street, Marina East, Hawaii Kai, Mariner's Cove, Honolulu, Honolulu County, Hawaii, 96825-3406, United States
HONOLULU, HI 968253405
Phone: (808) 396-6675
Fax: (808) 395-2104
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.
This can happen when there are no reportable CMS Open Payments records.
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: 2006-12-12
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 |
|---|---|---|---|---|
| I20061212000117 | I | Hospitalist | HI | 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 |
|---|---|---|---|---|
| 99233 | Subsequent hospital care with moderate levelof medical decision making, if using time, at least 50 minutes | 257 | 77 | $0 |
| 99232 | Subsequent hospital care with moderate levelof medical decision making, if using time, at least 35 minutes | 110 | 27 | $0 |
| 99239 | Hospital discharge day management, more than 30 minutes | 69 | 66 | $0 |
| 99223 | Initial hospital care with moderate level of medical decision making, if using time, at least 75 minutes | 44 | 43 | $0 |
Insurance plans in this area (ZIP 96813)
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Provider's Procedures
Group practice members
| Name | Specialty | State |
|---|---|---|
| Nurse Practitioner | HI | |
| General Practice | IL | |
| Cardiovascular Disease (Cardiology), Internal Medicine | HI | |
| H O S P I T A L I S T | HI | |
| E N D O C R I N O L O G Y | NY | |
| Nurse Practitioner | HI | |
| H O S P I T A L I S T | HI | |
| Nurse Practitioner | HI | |
| Geriatric Medicine, Family Practice | HI | |
| Internal Medicine | HI |
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