DR. MARC DEMYUN (MD) – Family Medicine Physician, NPI 1952366684
Family Medicine Physician
Main info
Doctor Profile
Profile Insights
NPPES metrics only — not quality of care.
448 GENERAL PRACTICE in TX
Provider Addresses for DR. MARC DEMYUN (MD)
4215 Joe Ramsey Blvd E
Greenville, TX 754017852
Phone: (903) 408-5000
Type: Location
2810 E Trinity Mills Rd Ste 130
Carrollton, TX 750062339
Phone: (972) 417-1936
Type: Location
2810 E TRINITY MILLS RD STE 130
CARROLLTON, TX 750062339
Phone: (972) 417-1936
Type: Location
4001 RIDGECREST RD STE A
GREENVILLE, TX 754026143
Phone: (903) 453-2850
Fax: (903) 453-2859
Type: Location
Merit Health Wesley, 5001, Hardy Street, Hattiesburg, Lamar County, Mississippi, 39402, United States
HATTIESBURG, MS 394021308
Phone: (601) 268-8549
Fax: (601) 268-8502
Type: Mailing
NPPES updates history
No NPPES updates recorded for this provider.
Prescription Activity
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Open Payments (CMS)
CMS reports 26 Open Payments records for all available years, with a total value of $6,020.
Total Amount is formed as General ($6,020) + Research ($0) + Ownership ($0) = $6,020.
Last reported payment date: 2024-12-11 • Largest payer in this snapshot: Gilead Sciences, Inc. ($5,747).
Total Amount
$6,020
General + Research + Ownership
Payments
26
Total payment records
General Amount
$6,020
General payments
Research Amount
$0
Research funding
Ownership Amount
$0
Ownership interests
Ownership Count
0
Ownership records
Last Payment Date
2024-12-11
Latest reported date
Top Companies
Largest payers in this snapshot
| Company | Amount |
|---|---|
| Gilead Sciences, Inc. | $5,747 |
| PFIZER INC. | $111 |
| Janssen Pharmaceuticals, Inc | $69 |
| Medtronic, Inc. | $55 |
| E.R. Squibb & Sons, L.L.C. | $20 |
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: 2014-02-06
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 |
|---|---|---|---|---|
| I20140206000150 | I | General Practice | TX | 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 |
|---|---|---|---|---|
| 99233 | Subsequent hospital care with moderate levelof medical decision making, if using time, at least 50 minutes | 31 | 18 | $0 |
| 99232 | Subsequent hospital care with moderate levelof medical decision making, if using time, at least 35 minutes | 28 | 17 | $0 |
| 99223 | Initial hospital care with moderate level of medical decision making, if using time, at least 75 minutes | 27 | 27 | $0 |
| 99239 | Hospital discharge day management, more than 30 minutes | 14 | 14 | $0 |
Insurance plans in this area (ZIP 75401)
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