BETTY S AHN (MD) – Emergency Medicine Physician, NPI 1902862089
Emergency Medicine Physician
Main info
Doctor Profile
Profile Insights
NPPES metrics only — not quality of care.
5,790 EMERGENCY MEDICINE in CA
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Provider Addresses for BETTY S AHN (MD)
PO BOX 60259
LOS ANGELES, CA 900600259
Phone: (626) 447-0296
Fax: (626) 447-6057
Type: Mailing
Huntington Hospital, 100, West California Boulevard, Pasadena, Los Angeles County, California, 91105, United States
PASADENA, CA 911053010
Phone: (626) 397-3445
Fax: (626) 397-5643
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: 2004-07-27
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 |
|---|---|---|---|---|
| I20040727000919 | I | Emergency Medicine | CA | 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 |
|---|---|---|---|---|
| 99285 | Emergency department visit with high level of medical decision making | 265 | 256 | $0 |
| 99284 | Emergency department visit with moderate level of medical decision making | 130 | 128 | $0 |
| 99291 | Critical care, first 30-74 minutes | 86 | 84 | $0 |
| 99283 | Emergency department visit with low level of medical decision making | 37 | 36 | $0 |
| 93010 | Routine electrocardiogram (ecg) using at least 12 leads with interpretation and report only | 16 | 16 | $0 |
Insurance plans in this area (ZIP 90060)
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Group practice members
| Name | Specialty | State |
|---|---|---|
| H O S P I T A L I S T | CA | |
| Emergency Medicine | GA | |
| Emergency Medicine | NY | |
| Emergency Medicine | CA | |
| Emergency Medicine | NY | |
| Emergency Medicine | CA | |
| Emergency Medicine | ME | |
| Emergency Medicine | CA | |
| Nurse Practitioner | CA | |
| Emergency Medicine | MO |
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