DR. MARY KATHRYN MCMAHAN (MD) – Internal Medicine Physician, NPI 1205021193
Internal Medicine Physician
Main info
Doctor Profile
Profile Insights
NPPES metrics only — not quality of care.
5,409 INTERNAL MEDICINE in GA
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Provider Addresses for DR. MARY KATHRYN MCMAHAN (MD)
PO BOX 2070
BAXLEY, GA 315152070
Phone: (912) 367-9841
Fax: (912) 367-7203
Type: Mailing
Appling HealthCare System, 163, East Tollison Street, Speer Homes, Baxley, Appling County, Georgia, 31515, United States
BAXLEY, GA 315130120
Phone: (912) 367-9841
Fax: (912) 367-7203
Type: Location
NPPES updates history
No NPPES updates recorded for this provider.
Prescription Activity
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Open Payments (CMS)
CMS reports 5 Open Payments records for all available years, with a total value of $100.
Total Amount is formed as General ($100) + Research ($0) + Ownership ($0) = $100.
Last reported payment date: 2024-10-21 • Largest payer in this snapshot: Merck Sharp & Dohme LLC ($53).
Total Amount
$100
General + Research + Ownership
Payments
5
Total payment records
General Amount
$100
General payments
Research Amount
$0
Research funding
Ownership Amount
$0
Ownership interests
Ownership Count
0
Ownership records
Last Payment Date
2024-10-21
Latest reported date
Top Companies
Largest payers in this snapshot
| Company | Amount |
|---|---|
| Merck Sharp & Dohme LLC | $53 |
| ZOLL Services LLC (A/K/A ZOLL LifeCor Corp) | $26 |
| PFIZER INC. | $21 |
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: 2009-08-20
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 |
|---|---|---|---|---|
| I20090820000428 | I | Internal Medicine | GA | 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 |
|---|---|---|---|---|
| 99223 | Initial hospital care with moderate level of medical decision making, if using time, at least 75 minutes | 220 | 196 | $0 |
| 99233 | Subsequent hospital care with moderate levelof medical decision making, if using time, at least 50 minutes | 54 | 30 | $0 |
| 99239 | Hospital discharge day management, more than 30 minutes | 39 | 38 | $0 |
| 99238 | Hospital discharge day management, 30 minutes or less | 14 | 13 | $0 |
| 99222 | Initial hospital care with straightforward or low-level medical decision making, if using time, at least 55 minutes | 11 | 11 | $0 |
Insurance plans in this area (ZIP 31515)
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Group practice members
| Name | Specialty | State |
|---|---|---|
| Internal Medicine | GA | |
| Nurse Practitioner | SC | |
| Internal Medicine | MD | |
| Nurse Practitioner | GA | |
| Internal Medicine, Hospitalist, Internal Medicine | SC | |
| Family Practice | AL | |
| Internal Medicine | GA | |
| Physician Assistant | SC | |
| Internal Medicine | GA | |
| Internal Medicine | GA |
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