DR. NATHANIEL H. LOO (M.D.) – Anesthesiology Physician, NPI 1861791329
Anesthesiology Physician
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NPPES metrics only — not quality of care.
4,592 ANESTHESIOLOGY in TX
Provider Addresses for DR. NATHANIEL H. LOO (M.D.)
PO BOX 845347
DALLAS, TX 752845347
Phone:
Type: Mailing
5323 HARRY HINES BLVD
DALLAS, TX 753907201
Phone: (214) 648-7837
Type: Location
906 W MCDERMOTT DR # 116-371
ALLEN, TX 750136510
Phone: (469) 541-1600
Fax: (469) 541-1601
Type: Mailing
4510 MEDICAL CENTER DR STE 211
MCKINNEY, TX 750691602
Phone: (469) 541-1600
Fax: (469) 541-1612
Type: Location
5323 Harry Hines Blvd
Dallas, TX 753907201
Phone: (214) 648-7837
Type: Location
10350 E Dakota Ave
Denver, CO 802471314
Phone: (303) 338-4545
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: 2023-06-19
PECOS data refreshed: 2026-05-27
Medicare revalidation (CMS due date list)
Due date not assigned yet
CMS is tracking 3 Medicare enrollment records; no due dates published yet.
Enrollment records
3
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 |
|---|---|---|---|---|
| I20160630002017 | I | Anesthesiology | TX | TBD |
| I20220826002171 | I | Anesthesiology | OR | TBD |
| I20230619001670 | I | Anesthesiology | GU | 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 |
|---|---|---|---|---|
| 00731 | Anesthesia for other procedure on esophagus, stomach, or upper small bowel using an endoscope | 28 | 27 | $0 |
| 00811 | Anesthesia for other procedure on large bowel using an endoscope | 18 | 18 | $0 |
| 01992 | Anesthesia for nerve block and injection procedure, prone position | 16 | 16 | $0 |
| 01214 | Anesthesia for total hip replacement | 15 | 15 | $0 |
| 64415 | Injection of anesthetic agent and/or steroid into arm nerve bundle (brachial plexus) | 14 | 14 | $0 |
Insurance plans in this area (ZIP 75284)
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Group practice members
| Name | Specialty | State |
|---|---|---|
| A N E S T H E S I O L O G Y | TX | |
| - | TX | |
| - | TX | |
| A N E S T H E S I O L O G Y | TX | |
| Certified Registered Nurse Anesthetist (Crna) | TX | |
| A N E S T H E S I O L O G Y | TX | |
| - | TX | |
| A N E S T H E S I O L O G Y | TX | |
| Certified Registered Nurse Anesthetist (Crna) | TX | |
| A N E S T H E S I O L O G Y | TX |
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