DR. JOHN HOWELL HAMILTON M. D.
NPI 1487034831
General Practice in San Antonio, TX
About Dr. John Howell Hamilton M. D. NPPES
Official registry information on file with the National Plan and Provider Enumeration System.
DR. JOHN HOWELL HAMILTON M. D. (NPI 1487034831) is an individual general practice provider in San Antonio, Texas, licensed in Florida (ME165198) and active in the NPI registry since June 2015. He is enrolled in Medicare PECOS, is affiliated with Peterson Regional Medical Center, and maintains a secondary practice location in Port St Lucie.
NPPES Registry Identity
Specialties & Licenses 2
Secondary Practice Location 1
Group Practice 1
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 Howell Hamilton M. D. 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
14Medicare enrollment records show John Hamilton reassigns Medicare billing to 14 organizations. Each organization bills Medicare for the services this provider delivers there; the nearest is listed first.
San Antonio, TX 78229
- Reassigned Medicare billing, Texas enrollment
- 1,452 clinicians in this Medicare group
San Antonio, TX 78249
- Reassigned Medicare billing, Texas enrollment
- 379 clinicians in this Medicare group
San Antonio, TX 78229
- Reassigned Medicare billing, Texas enrollment
- 149 clinicians in this Medicare group
San Marcos, TX 78666
- Reassigned Medicare billing, Texas enrollment
- 137 clinicians in this Medicare group
Gonzales, TX 78629
- Reassigned Medicare billing, Texas enrollment
- 430 clinicians in this Medicare group
Austin, TX 78705
- Reassigned Medicare billing, Texas enrollment
- 1,511 clinicians in this Medicare group
Cedar Park, TX 78613
- Reassigned Medicare billing, Texas enrollment
- 104 clinicians in this Medicare group
Alice, TX 78332
- Reassigned Medicare billing, Texas enrollment
- 173 clinicians in this Medicare group
Alice, TX 78332
- Reassigned Medicare billing, Texas enrollment
- 174 clinicians in this Medicare group
Killeen, TX 76549
- Reassigned Medicare billing, Texas enrollment
- 387 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 5
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 4
Hospitals where this provider delivers care, identified from recent Medicare claims and place-of-service records.
Peterson Regional Medical Center
Acute Care Hospitals · Kerrville, TXMethodist Hospital Atascosa
Acute Care Hospitals · Jourdanton, TXChristus Santa Rosa Hospital-San Marcos
Acute Care Hospitals · San Marcos, TXMethodist Hospital
Acute Care Hospitals · San Antonio, TXOther Providers at the Same Location NPPES 20
Providers registered at the same practice address, or within the immediate area, according to the NPPES registry.
SAN ANTONIO, TX 78205
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 Hamilton's NPI number?
The NPI number for John Hamilton is 1487034831. It was assigned to this individual provider in the NPPES registry on June 1, 2015.
Where is John Hamilton located?
John Hamilton practices at 111 Dallas St, San Antonio, TX 78205. The listed phone number is (210) 297-7000.
What is John Hamilton's specialty?
The primary specialty registered for this NPI is General Practice with taxonomy code 208D00000X.
Is John Hamilton enrolled in Medicare?
Yes. John Hamilton 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 Hamilton's services?
According to the CMS Revalidation Reassignment List (October 2026 release), John Hamilton reassigns Medicare benefits to 14 organizations: Emergency Medicine Services Of Tx, PLLC (San Antonio, TX), Third Coast Emergency Physicians Southwest PA (San Antonio, TX), Bexar Emergency Physicians, PLLC (San Antonio, TX), Comal Emergency Physicians, PLLC (San Marcos, TX), Victoria Emergency Partners LLC (Gonzales, TX) and 9 more organizations, listed in the Medicare section above. 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 Hamilton's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.
What insurance does John Hamilton accept?
Health plans from Baylor Scott and White Health Plan, Blue Cross and Blue Shield of Texas, CHRISTUS Health Plan, Cigna HealthCare of Florida, Inc. and Cigna Healthcare and 9 other insurers list John Hamilton 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 Hamilton affiliated with any hospitals?
According to CMS data, John Hamilton is affiliated with Peterson Regional Medical Center, Methodist Hospital Atascosa, Christus Santa Rosa Hospital-San Marcos and Methodist Hospital.
When was this NPI record last updated?
The NPPES record for John Hamilton was last updated on November 27, 2024. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 23 months 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 Howell Hamilton, M. D. · NPI 1487034831
General Practice physician in San Antonio, Texas. Individual provider, active in the CMS NPPES registry since June 1, 2015.
## Identity
- **NPI:** 1487034831 (Entity type: Individual)
- **Enumerated:** June 1, 2015
- **Primary specialty:** General Practice · taxonomy 208D00000X
- **State license:** ME165198 (Florida)
- **Sole proprietor:** Yes
## Practice location
- **Address:** 111 DALLAS ST, San Antonio, TX 78205
- **Phone:** (210) 297-7000
## 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:** 14 organizations under Medicare reassignment (form CMS-855R): Emergency Medicine Services Of Tx, PLLC (NPI 1245938729, San Antonio, TX); Third Coast Emergency Physicians Southwest PA (NPI 1497793475, San Antonio, TX); Bexar Emergency Physicians, PLLC (NPI 1548034994, San Antonio, TX); Comal Emergency Physicians, PLLC (NPI 1588438675, San Marcos, TX); Victoria Emergency Partners LLC (NPI 1164770996, Gonzales, TX); and 9 more · CMS Revalidation Reassignment List, October 2026 release
- **Medical school:** Other, class of 2015
## Record status
- **NPPES last updated:** November 27, 2024
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Source: [NPI Profile](https://npiprofile.com/npi/1487034831) · Data from the CMS NPPES public registry.