MARY ELLEN MAHONEY (M.D.) – Surgery Physician, NPI 1750352621
Surgery Physician
Main info
Doctor Profile
Profile Insights
NPPES metrics only — not quality of care.
1,034 GENERAL PRACTICE in CA
Provider Addresses for MARY ELLEN MAHONEY (M.D.)
PO BOX 990208
REDDING, CA 960990208
Phone: (530) 212-0073
Fax: (844) 440-2311
Type: Mailing
636 HARRIS ST STE A
EUREKA, CA 955034448
Phone: (707) 476-0690
Fax: (707) 476-0692
Type: Location
Jack in the Box, Railroad Avenue, Redding, Shasta County, California, 96001, United States
REDDING, CA 960496084
Phone: (530) 241-0473
Fax: (530) 241-5377
Type: Mailing
2504, Harrison Avenue, Eureka, Humboldt County, California, 95501, United States
SUITE A
EUREKA, CA 955013236
Phone: (707) 476-0690
Fax: (707) 476-0692
Type: Location
NPPES updates history
No NPPES updates recorded for this provider.
Prescription Activity
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Open Payments (CMS)
CMS reports 2 Open Payments records for all available years, with a total value of $206.
Total Amount is formed as General ($206) + Research ($0) + Ownership ($0) = $206.
Last reported payment date: 2023-10-24 • Largest payer in this snapshot: Merck Sharp & Dohme LLC ($115).
Total Amount
$206
General + Research + Ownership
Payments
2
Total payment records
General Amount
$206
General payments
Research Amount
$0
Research funding
Ownership Amount
$0
Ownership interests
Ownership Count
0
Ownership records
Last Payment Date
2023-10-24
Latest reported date
Top Companies
Largest payers in this snapshot
| Company | Amount |
|---|---|
| Merck Sharp & Dohme LLC | $115 |
| E.R. Squibb & Sons, L.L.C. | $91 |
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: 2009-06-03
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 |
|---|---|---|---|---|
| I20090603000116 | I | General Practice | 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 | 28 | 24 | $0 |
| 99213 | Established patient office or other outpatient visit, 20-29 minutes | 27 | 24 | $0 |
| 38900 | Imaging of lymph nodes during surgery | 26 | 25 | $0 |
| 99204 | New patient office or other outpatient visit, 45-59 minutes | 19 | 19 | $0 |
| 19301 | Partial removal of breast | 18 | 16 | $0 |
Insurance plans in this area (ZIP 96099)
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Provider's Procedures
| Specialty | Practice State | HCPCS Code | Description | Service Count | Beneficiary Count |
|---|---|---|---|---|---|
| GENERAL PRACTICE | CA | 38900 | Lymph node imaging during surgery | 18 | 18 |
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