DR. GRACE GIA-LING WONG CASSERLY (MD) – Internal Medicine Physician, NPI 1154735587
Internal Medicine Physician
Main info
Doctor Profile
Profile Insights
NPPES metrics only — not quality of care.
5,245 INTERNAL MEDICINE in MD
Provider Addresses for DR. GRACE GIA-LING WONG CASSERLY (MD)
1701 TWIN SPRINGS RD
HALETHORPE, MD 21227
Phone: (410) 737-5000
Type: Location
2401 W Belvedere Ave
Baltimore, MD 212155216
Phone: (410) 601-9386
Type: Location
2 Upper Ragsdale Dr Bldg A
Monterey, CA 939405736
Phone: (831) 333-3040
Fax: (831) 886-3639
Type: Location
2 UPPER RAGSDALE DR BLDG A
MONTEREY, CA 939405736
Phone: (831) 333-3040
Fax: (831) 886-3639
Type: Mailing
NPPES updates history
No NPPES updates recorded for this provider.
Prescription Activity
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Open Payments (CMS)
CMS reports 4 Open Payments records for all available years, with a total value of $307.
Total Amount is formed as General ($307) + Research ($0) + Ownership ($0) = $307.
Last reported payment date: 2024-11-25 • Largest payer in this snapshot: Edwards Lifesciences Corporation ($186).
Total Amount
$307
General + Research + Ownership
Payments
4
Total payment records
General Amount
$307
General payments
Research Amount
$0
Research funding
Ownership Amount
$0
Ownership interests
Ownership Count
0
Ownership records
Last Payment Date
2024-11-25
Latest reported date
Top Companies
Largest payers in this snapshot
| Company | Amount |
|---|---|
| Edwards Lifesciences Corporation | $186 |
| Cochlear Americas | $96 |
| Lilly USA, LLC | $25 |
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: 2020-08-27
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 |
|---|---|---|---|---|
| I20200827000209 | I | Internal 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 |
|---|---|---|---|---|
| 99214 | Established patient office or other outpatient visit, 30-39 minutes | 1,186 | 567 | $0 |
| G0439 | Annual wellness visit, includes a personalized prevention plan of service (pps), subsequent visit | 240 | 240 | $0 |
| 99213 | Established patient office or other outpatient visit, 20-29 minutes | 102 | 95 | $0 |
| G0009 | Administration of pneumococcal vaccine | 81 | 81 | $0 |
| 90677 | Pneumococcal conjugate vaccine, 20 valent (pcv20), for intramuscular use | 74 | 74 | $0 |
Insurance plans in this area (ZIP 21227)
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Group practice members
| Name | Specialty | State |
|---|---|---|
| Nurse Practitioner | CA | |
| Physician Assistant | CA | |
| R H E U M A T O L O G Y | MA | |
| Physician Assistant | CA | |
| Internal Medicine | CA | |
| U R O L O G Y | KS | |
| Family Practice | IL | |
| E N D O C R I N O L O G Y | CA | |
| - | AR | |
| Nurse Practitioner | CA |
Reviews
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