DR. CHARLES DEWEY MCMAHON (M.D.) – Ophthalmology Physician, NPI 1639168735
Ophthalmology Physician
Main info
Doctor Profile
Profile Insights
NPPES metrics only — not quality of care.
396 OPHTHALMOLOGY in CO
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Provider Addresses for DR. CHARLES DEWEY MCMAHON (M.D.)
PO BOX 280
COLORADO SPRINGS, CO 809010280
Phone: (719) 440-0058
Fax: (719) 434-8855
Type: Mailing
International Circle, K-Land, Knob Hill, Colorado Springs, El Paso County, Colorado, 80910, United States
COLORADO SPRINGS, CO 809103152
Phone: (719) 633-8000
Fax: (719) 434-8855
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 $44.
Total Amount is formed as General ($44) + Research ($0) + Ownership ($0) = $44.
Last reported payment date: 2024-07-08 • Largest payer in this snapshot: ABBVIE INC. ($30).
Total Amount
$44
General + Research + Ownership
Payments
2
Total payment records
General Amount
$44
General payments
Research Amount
$0
Research funding
Ownership Amount
$0
Ownership interests
Ownership Count
0
Ownership records
Last Payment Date
2024-07-08
Latest reported date
Top Companies
Largest payers in this snapshot
| Company | Amount |
|---|---|
| ABBVIE INC. | $30 |
| Thea Pharma Inc. | $14 |
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: 2003-12-04
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 |
|---|---|---|---|---|
| I20031204000595 | I | Ophthalmology | CO | 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 | 213 | 111 | $0 |
| 99213 | Established patient office or other outpatient visit, 20-29 minutes | 124 | 81 | $0 |
| 92250 | Photography of the retina | 81 | 66 | $0 |
| 92134 | Imaging of retina | 56 | 26 | $0 |
| 92133 | Imaging of optic nerve | 36 | 34 | $0 |
Insurance plans in this area (ZIP 80901)
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Provider's Procedures
| Specialty | Practice State | HCPCS Code | Description | Service Count | Beneficiary Count |
|---|---|---|---|---|---|
| OPHTHALMOLOGY | CO | 92134 | Diagnostic imaging of retina | 40 | 36 |
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