MARY KATHERINE GUAY (PA-C) – Physician Assistant, NPI 1790769008
Physician Assistant
Main info
Doctor Profile
Profile Insights
NPPES metrics only — not quality of care.
10,570 PHYSICIAN ASSISTANT in CA
Provider Addresses for MARY KATHERINE GUAY (PA-C)
PO BOX 232410
SAN DIEGO, CA 921932410
Phone:
Type: Mailing
200 W Arbor Dr
San Diego, CA 921039000
Phone: (800) 926-8273
Type: Location
UC San Diego Medical Center, 200, West Arbor Drive, Hillcrest, San Diego, San Diego County, California, 92103, United States
SAN DIEGO, CA 921039000
Phone: (800) 926-8273
Type: Location
6201 GREENLEIGH AVE
MIDDLE RIVER, MD 212202004
Phone: (410) 933-6423
Fax: (410) 500-4266
Type: Mailing
1800 ORLEANS ST
BALTIMORE, MD 212870010
Phone: (410) 502-2037
Fax: (410) 955-0737
Type: Location
NPPES updates history
No NPPES updates recorded for this provider.
Prescription Activity
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Open Payments (CMS)
CMS reports 8 Open Payments records for all available years, with a total value of $682.
Total Amount is formed as General ($682) + Research ($0) + Ownership ($0) = $682.
Last reported payment date: 2024-09-25 • Largest payer in this snapshot: Amgen Inc. ($254).
Total Amount
$682
General + Research + Ownership
Payments
8
Total payment records
General Amount
$682
General payments
Research Amount
$0
Research funding
Ownership Amount
$0
Ownership interests
Ownership Count
0
Ownership records
Last Payment Date
2024-09-25
Latest reported date
Top Companies
Largest payers in this snapshot
| Company | Amount |
|---|---|
| Amgen Inc. | $254 |
| Takeda Pharmaceuticals U.S.A., Inc. | $117 |
| Kite Pharma, Inc. | $114 |
| Bayer Healthcare Pharmaceuticals Inc. | $80 |
| SANOFI-AVENTIS U.S. LLC | $67 |
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: 2019-04-24
PECOS data refreshed: 2026-05-27
Medicare revalidation (CMS due date list)
Due date not assigned yet
CMS is tracking 2 Medicare enrollment records; no due dates published yet.
Enrollment records
2
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 |
|---|---|---|---|---|
| I20131120000502 | I | Physician Assistant | MD | TBD |
| I20190424002764 | I | Physician Assistant | 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.
No Medicare fee-for-service utilization data available for this provider in our database.
Insurance plans in this area (ZIP 92193)
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Group practice members
| Name | Specialty | State |
|---|---|---|
| Internal Medicine | MD | |
| O T O L A R Y N G O L O G Y | TX | |
| Clinical Psychologist | MD | |
| Physician Assistant | MD | |
| Physician Assistant | MD | |
| O P H T H A L M O L O G Y | MD | |
| Pulmonary Disease, Internal Medicine | MD | |
| A N E S T H E S I O L O G Y | MD | |
| - | MD | |
| Emergency Medicine, Internal Medicine | MD |
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