DR. MARGARET M SHANNON (M.D.) – Dermatology Physician, NPI 1265449441
Dermatology Physician
Main info
Doctor Profile
Profile Insights
NPPES metrics only — not quality of care.
2,140 DERMATOLOGY in CA
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Provider Addresses for DR. MARGARET M SHANNON (M.D.)
275, Victoria Street, Thurin, Costa Mesa, Orange County, California, 92627, United States
SUITE 1H
COSTA MESA, CA 926271906
Phone: (949) 646-2311
Fax: (949) 646-1064
Mailing address matches the actual address.
NPPES updates history
No NPPES updates recorded for this provider.
Prescription Activity
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Open Payments (CMS)
CMS reports 38 Open Payments records for all available years, with a total value of $1,433.
Total Amount is formed as General ($1,433) + Research ($0) + Ownership ($0) = $1,433.
Last reported payment date: 2024-12-12 • Largest payer in this snapshot: Janssen Biotech, Inc. ($349).
Total Amount
$1,433
General + Research + Ownership
Payments
38
Total payment records
General Amount
$1,433
General payments
Research Amount
$0
Research funding
Ownership Amount
$0
Ownership interests
Ownership Count
0
Ownership records
Last Payment Date
2024-12-12
Latest reported date
Top Companies
Largest payers in this snapshot
| Company | Amount |
|---|---|
| Janssen Biotech, Inc. | $349 |
| Incyte Corporation | $282 |
| Arcutis Biotherapeutics, Inc. | $269 |
| Regeneron Healthcare Solutions, Inc. | $191 |
| UCB, Inc. | $45 |
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: 2010-11-04
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 |
|---|---|---|---|---|
| I20101104000305 | I | Dermatology | 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 |
|---|---|---|---|---|
| 17003 | Destruction of precancer skin growth, 2-14 growths | 3,629 | 373 | $0 |
| 99213 | Established patient office or other outpatient visit, 20-29 minutes | 1,196 | 562 | $0 |
| 17000 | Destruction of precancer skin growth, 1 growth | 736 | 428 | $0 |
| 88305 | Pathology examination of tissue using a microscope, intermediate complexity | 609 | 323 | $0 |
| 11102 | Biopsy of related skin growth, first growth | 408 | 308 | $0 |
Insurance plans in this area (ZIP 92627)
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Provider's Procedures
| Specialty | Practice State | HCPCS Code | Description | Service Count | Beneficiary Count |
|---|---|---|---|---|---|
| DERMATOLOGY | CA | 11101 | Biopsy of each additional growth of skin and/or tissue | 169 | 120 |
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