DR. JOHN STUART LARKIN MD
NPI 1669797619
Emergency Medicine in Bellaire, TX
About Dr. John Stuart Larkin Md NPPES
Official registry information on file with the National Plan and Provider Enumeration System.
DR. JOHN STUART LARKIN MD (NPI 1669797619) is an individual emergency medicine provider in Bellaire, Texas, licensed in Texas (N-5179) and active in the NPI registry since April 2010. He is enrolled in Medicare PECOS, is affiliated with Memorial Hermann Hospital System, and is a graduate of University Of Texas Medical School At Houston (2008).
NPPES Registry Identity
Specialties & Licenses 2
Accepted Insurance
Medicare Participation & PECOS CMS
Medicare enrollment, assignment, billing reassignment, and ordering and referring status from CMS.
Medicare Enrollment Status
Enrolled in Medicare and accepts Medicare assignment
Dr. John Stuart Larkin Md is registered in PECOS and agrees to accept the Medicare-approved amount as full payment. Medicare patients are not billed beyond the standard deductible and coinsurance.
Medicare Billing Reassignments
2Medicare enrollment records show John Larkin reassigns Medicare billing to 2 organizations. Each organization bills Medicare for the services this provider delivers there; the nearest is listed first.
Houston, TX 77024
- Reassigned Medicare billing, Texas enrollment
- 408 clinicians in this Medicare group
Gainesville, TX 76240
- Reassigned Medicare billing, Texas enrollment
- 1,193 clinicians in this Medicare group
Source: CMS Revalidation Reassignment List, October 2026 release. Reassignment records can lag staffing changes; confirm a current affiliation with the organization.
Areas of Expertise CMS Part B claims 4
Services this provider delivered to Medicare fee-for-service patients, from the CMS Medicare utilization data. Higher counts generally reflect more experience with a service; care delivered outside Medicare is not included.
Hospital Affiliations CMS Care Compare
Hospitals where this provider delivers care, identified from recent Medicare claims and place-of-service records.
Memorial Hermann Hospital System
Acute Care Hospitals · Houston, TXPhysician Visit Costs CMS claims · ZIP area
Typical Medicare office-visit costs in the 77401 ZIP code area, from fee-for-service claims. These are area statistics, not this provider’s prices; actual charges vary by service and coverage.
Other Providers at the Same Location NPPES 20
Providers registered at the same practice address, or within the immediate area, according to the NPPES registry.
BELLAIRE, TX 77401
BELLAIRE, TX 77401
BELLAIRE, TX 77401
BELLAIRE, TX 77401
BELLAIRE, TX 77401
Frequently Asked Questions NPPES & CMS
Common questions about this NPI record, answered from the official NPPES registry and CMS datasets shown on this page.
What is John Larkin's NPI number?
The NPI number for John Larkin is 1669797619. It was assigned to this individual provider in the NPPES registry on April 1, 2010.
Where is John Larkin located?
John Larkin practices at 6800 West Loop S Suite 300, Bellaire, TX 77401. The listed phone number is (713) 838-0800.
What is John Larkin's specialty?
The primary specialty registered for this NPI is Emergency Medicine with taxonomy code 207P00000X.
Is John Larkin enrolled in Medicare?
Yes. John Larkin is registered in the Medicare PECOS system and accepts Medicare assignment, which means accepting the Medicare-approved amount as payment in full for covered services.
Which organizations bill Medicare for John Larkin's services?
According to the CMS Revalidation Reassignment List (October 2026 release), John Larkin reassigns Medicare benefits to 2 organizations: Memorial Hermann Hospital Based Physician Group (Houston, TX) and Acs Primary Care Physicians Southwest, PA (Gainesville, TX). Each reassignment is filed with Medicare on form CMS-855R, signed by both the clinician and the organization, and lets the organization bill Medicare and receive payment for John Larkin's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.
What insurance does John Larkin accept?
Health plans from Blue Cross and Blue Shield of Texas and Oscar Insurance Company list John Larkin as in-network in at least one marketplace plan. Coverage varies by plan and year; verify with the insurer or the provider before a visit.
Is John Larkin affiliated with any hospitals?
According to CMS data, John Larkin is affiliated with Memorial Hermann Hospital System.
When was this NPI record last updated?
The NPPES record for John Larkin was last updated on September 17, 2024. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 2 years ago. If this record has changed at CMS more recently, you can request an on-demand re-check against the live CMS registry, directly from this page.
# Dr. John Stuart Larkin, MD · NPI 1669797619
Emergency Medicine physician in Bellaire, Texas. Individual provider, active in the CMS NPPES registry since April 1, 2010.
## Identity
- **NPI:** 1669797619 (Entity type: Individual)
- **Enumerated:** April 1, 2010
- **Primary specialty:** Emergency Medicine · taxonomy 207P00000X
- **State license:** N-5179 (Texas)
- **Sole proprietor:** No
## Practice location
- **Address:** 6800 WEST LOOP S, SUITE 300, Bellaire, TX 77401-4528
- **Phone:** (713) 838-0800
## Medicare
- **Medicare:** Enrolled (PECOS); accepts Medicare assignment
- **Ordering & referring:** eligible for Part B labs & imaging, durable medical equipment, home health, power mobility devices
- **Bills Medicare through:** 2 organizations under Medicare reassignment (form CMS-855R): Memorial Hermann Hospital Based Physician Group (NPI 1295363497, Houston, TX); Acs Primary Care Physicians Southwest, PA (NPI 1538101019, Gainesville, TX) · CMS Revalidation Reassignment List, October 2026 release
- **Medical school:** University Of Texas Medical School At Houston, class of 2008
## Record status
- **NPPES last updated:** September 17, 2024
---
Source: [NPI Profile](https://npiprofile.com/npi/1669797619) · Data from the CMS NPPES public registry.