Provider records sourced from NPPES (CMS National Plan & Provider Enumeration System). Data current as of October 4, 2026.
NPIDirectory

Dr. Nathaniel H. Loo, MD

Individual provider Anesthesiology Physician · NPI 1861791329

Dr. Nathaniel H. Loo, MD practises Anesthesiology in McKinney, Texas. Graduated from Baylor College of Medicine in 2011, 15 years ago. Practices with Allen Anesthesia Associates, a 92-clinician group, works from 3 locations and accepts Medicare assignment. Licensed in Colorado, Guam and Texas.

Years since qualifying
15
Trained at
Baylor College of Medicine
Licensed in
CO, GU, TX
In the registry since
2011
Specialties on file
4
What do these letters mean?
MD — Doctor of Medicine
A physician who completed allopathic medical school.

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Practice location Address checks out

4510 Medical Center Dr Ste 211
McKinney, TX 75069-1602
Phone: (469) 541-1600
Fax: (469) 541-1612
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Pin is approximate — placed at the ZIP-code centre, not the exact door.

Additional practice locations (2)

  • 10350 E Dakota Ave, Denver, CO 80247-1314 — (303) 338-4545
  • 5323 Harry Hines Blvd, Dallas, TX 75390-7201 — (214) 648-7837

Specialties & licences

Anesthesiology Physician (primary) Taxonomy 207L00000X · Licence Q3040 (TX)
Anesthesiology Physician Taxonomy 207L00000X · Licence CDR.0002531 (CO)
Anesthesiology Physician Taxonomy 207L00000X · Licence MC-138 (GU)
Pain Medicine (Anesthesiology) Physician Taxonomy 207LP2900X · Licence Q3040 (TX)

Record details

NPI number1861791329
Entity typeIndividual (Type 1)
GenderMale
Credentials MD
Sole proprietorYes
NPI enumeratedMarch 23, 2011
Last updated in NPPESSeptember 28, 2023
Certification dateSeptember 28, 2023

Medicare enrollment

From the CMS Doctors & Clinicians file — this clinician is enrolled in Medicare.

Medicare specialtyANESTHESIOLOGY
Also practisesPAIN MANAGEMENT
Medical schoolBAYLOR COLLEGE OF MEDICINE
Graduated 2011 (15 years in practice)
Group practice Allen Anesthesia Associates — 92 clinicians
Accepts Medicare assignment Yes — accepts the Medicare-approved amount

Medicare patients and services, 2024

From the CMS Medicare Physician & Other Practitioners file for calendar year 2024. It counts Original Medicare patients only, so a practice that mostly sees Medicare Advantage or privately insured patients looks smaller here than it is.

Medicare patients197
Services billed 234 a service is one billed item, such as a visit, a test or a procedure
Average patient age74

Dollar amounts are not shown. What Medicare pays a practice is gross billings, before staff, premises and tax and including the cost of any drugs it administers, so it is not what a clinician earns.

Practises at

Facilities the CMS Facility Affiliation file lists for this clinician. Those with a page here are linked.

Colleagues at Allen Anesthesia Associates

Clinicians the CMS Doctors & Clinicians file lists under the same group practice. CMS counts 92 clinicians in the practice; 12 are shown here.

Other providers in McKinney