DR. DAVID GLENN MARKWELL (PHD, LPC, NCC) – Professional Counselor, NPI 1336173541
Professional Counselor
Main info
Profile Insights
NPPES metrics only — not quality of care.
Provider Addresses for DR. DAVID GLENN MARKWELL (PHD, LPC, NCC)
4343 SHALLOWFORD RD STE 220
MARIETTA, GA 300625077
Phone: (770) 993-9700
Fax: (770) 993-9800
Type: Location
2451 MITCHELL RD NE
MARIETTA, GA 300627905
Phone: (770) 713-6064
Fax: (770) 993-9800
Type: Mailing
2440 SANDY PLAINS ROAD
BUILDING 21 SUITE 200
MARIETTA, GA 300667233
Phone: (770) 993-9700
Fax: (770) 993-9800
Type: Location
Shallowford Road Northeast, Carlisle Acres, Marietta, Cobb County, Georgia, 30066, United States
SUITE C 2
MARIETTA, GA 300625023
Phone: (770) 993-9700
Fax: (770) 993-9800
Type: Location
NPPES updates history
No NPPES updates recorded for this provider.
Prescription Activity
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Open Payments (CMS)
No Open Payments data available for this provider.
This can happen when there are no reportable CMS Open Payments records.
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: 2024-03-25
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 |
|---|---|---|---|---|
| I20240325003886 | I | Mental Health Counselor | 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.
No Medicare fee-for-service utilization data available for this provider in our database.
Insurance plans in this area (ZIP 30062)
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