MR. ROBERT WING CHAN (MD) – Internal Medicine Physician, NPI 1508826488
Internal Medicine Physician
Main info
Doctor Profile
Profile Insights
NPPES metrics only — not quality of care.
21,511 INTERNAL MEDICINE in CA
Loading map...
Provider Addresses for MR. ROBERT WING CHAN (MD)
1234, South Garfield Avenue, Alhambra, Los Angeles County, California, 91801, United States
SUITE 103
ALHAMBRA, CA 918015036
Phone: (626) 576-7871
Fax: (626) 576-7872
Mailing address matches the actual address.
NPPES updates history
No NPPES updates recorded for this provider.
Prescription Activity
Loading prescription activity...
Open Payments (CMS)
CMS reports 49 Open Payments records for all available years, with a total value of $1,256.
Total Amount is formed as General ($1,256) + Research ($0) + Ownership ($0) = $1,256.
Last reported payment date: 2024-12-18 • Largest payer in this snapshot: AstraZeneca Pharmaceuticals LP ($273).
Total Amount
$1,256
General + Research + Ownership
Payments
49
Total payment records
General Amount
$1,256
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 |
|---|---|
| AstraZeneca Pharmaceuticals LP | $273 |
| ABBVIE INC. | $212 |
| Exact Sciences Corporation | $197 |
| Novo Nordisk Inc | $140 |
| Merck Sharp & Dohme LLC | $72 |
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: 2010-09-22
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 |
|---|---|---|---|---|
| I20100922001167 | 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 |
|---|---|---|---|---|
| 99490 | Chronic care management services, first 20 minutes of clinical staff time directed by health care professional, per calendar month | 3,775 | 387 | $0 |
| 99213 | Established patient office or other outpatient visit, 20-29 minutes | 3,314 | 422 | $0 |
| G2012 | Brief communication technology-based service, e.g. virtual check-in, by a physician or other qualified health care professional who can report evaluation and management services, provided to an established patient, not originating from a related e/m servic | 1,523 | 191 | $0 |
| 99442 | Telephone medical discussion with physician, 11-20 minutes | 1,512 | 191 | $0 |
| 36410 | Insertion of needle into vein (3 years or older) | 222 | 139 | $0 |
Insurance plans in this area (ZIP 91801)
Loading plans...
Provider's Procedures
| Specialty | Practice State | HCPCS Code | Description | Service Count | Beneficiary Count |
|---|---|---|---|---|---|
| INTERNAL MEDICINE | CA | 83036 | Hemoglobin A1C level | 95 | 61 |
Reviews
All reviews are moderated before publication. Reviews reflect users' opinions; we do not verify the accuracy of individual reviews.
No reviews yet. Be the first to share your experience — your opinion helps families compare providers.