DR. MARK C LITTLEJOHN (MD) – Otolaryngology Physician, NPI 1932176252
Otolaryngology Physician
Main info
Doctor Profile
Profile Insights
NPPES metrics only — not quality of care.
892 OTOLARYNGOLOGY in TX
Provider Addresses for DR. MARK C LITTLEJOHN (MD)
8380 WARREN PKWY STE 504
FRISCO, TX 750344253
Phone: (972) 596-4005
Fax: (972) 985-1253
Mailing address matches the actual address.
NPPES updates history
No NPPES updates recorded for this provider.
Prescription Activity
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Open Payments (CMS)
CMS reports 1 Open Payments records for all available years, with a total value of $36.
Total Amount is formed as General ($36) + Research ($0) + Ownership ($0) = $36.
Last reported payment date: 2023-01-11 • Largest payer in this snapshot: Itamar Medical Inc ($36).
Total Amount
$36
General + Research + Ownership
Payments
1
Total payment records
General Amount
$36
General payments
Research Amount
$0
Research funding
Ownership Amount
$0
Ownership interests
Ownership Count
0
Ownership records
Last Payment Date
2023-01-11
Latest reported date
Top Companies
Largest payers in this snapshot
| Company | Amount |
|---|---|
| Itamar Medical Inc | $36 |
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: 2004-12-22
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 |
|---|---|---|---|---|
| I20041222000837 | I | Otolaryngology | 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 |
|---|---|---|---|---|
| 99203 | New patient office or other outpatient visit, 30-44 minutes | 198 | 198 | $0 |
| 99204 | New patient office or other outpatient visit, 45-59 minutes | 195 | 195 | $0 |
| 99213 | Established patient office or other outpatient visit, 20-29 minutes | 172 | 137 | $0 |
| 31575 | Diagnostic exam of voice box using a flexible endoscope | 122 | 102 | $0 |
| 99212 | Established patient office or other outpatient visit, 10-19 minutes | 95 | 78 | $0 |
Insurance plans in this area (ZIP 75034)
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Group practice members
| Name | Specialty | State |
|---|---|---|
| General Surgery | AZ | |
| Physician Assistant | TX | |
| Internal Medicine | TX | |
| Nurse Practitioner | TX | |
| Nurse Practitioner | TX | |
| - | TX | |
| Hematology/Oncology, Internal Medicine | TX | |
| E N D O C R I N O L O G Y | TX | |
| Nurse Practitioner | IL | |
| - | NC |
Reviews
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