Addison Marshall
NPI 1366911265 · Physician Assistant · San Antonio, TX
Enrolled with Medicare as Practitioner - Physician Assistant · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Addison Marshall is a Physician Assistant provider in San Antonio, TX (NPI 1366911265).
Provider details
- NPI number
- 1366911265
- Entity type
- Individual
- Primary specialty
- Physician AssistantPhysician Assistants & Advanced Practice Nursing Providers
- Sex
- Male
- Sole proprietor
- Yes
- License
- PA12539 (TX)
Specialties & taxonomies
Physician Assistants & Advanced Practice Nursing Providers
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure25% of score
7 yrs in NPPES registry
- Profile completeness25% of score
100% of core fields populated
- Practice footprint15% of score
3 documented practice locations
- Medicare service volume (vs. specialty peers)25% of score
824 Medicare services, 2024 (ranked within specialty)
- Open Payments transparency10% of score
Has Open Payments disclosures (2024)
Medicare volume is ranked against active providers in the same specialty. Signals a provider has no public data for (e.g. Medicare claims) are left out of the score entirely — never counted as zero — so providers without that data are not penalized. See the full formula and weights in our .
What this provider does (Medicare)
Based on Medicare fee-for-service claims, 2024; not all care is captured.
| Service (HCPCS) | Medicare services | Typical Medicare-allowed (2024) |
|---|---|---|
| Established Patient Office Or Other Outpatient Visit With Low Level OD Decision Making, If Using Time, 20 Minutes Or More99213 | 362 | $73 |
| Drug Test(s), Definitive, Utilizing (1) Drug Identification Methods Able to Identify Individual Drugs and Distinguish Between Structural Isomers (but Not Necessarily Stereoisomers), Including, But Not Limited to Gc/Ms (any Type, Single Or Tandem) and Lc/MsG0482 | 118 | $195 |
| New Patient Office Or Other Outpatient Visit With Moderate Level of Medical Decision Making, If Using Time, 45 Minutes Or More99204 | 96 | $133 |
| Aspiration And/Or Injection of Fluid Large Joint Using Ultrasound Guidance20611 | 74 | $104 |
| Established Patient Office Or Other Outpatient Visit With Moderate Level of Decision Making, If Using Time, 30 Minutes Or More99214 | 73 | $104 |
What this provider prescribes (Medicare Part D)
Top drugs by Medicare Part D claim volume, 2024 · 17 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Gabapentin | 187 | 79 |
| Tramadol Hcl | 112 | 31 |
| Pregabalin | 94 | 31 |
| Tizanidine Hcl | 92 | 39 |
| Cyclobenzaprine Hcl | 55 | 30 |
| Meloxicam | 53 | 15 |
| Duloxetine Hcl | 50 | 16 |
Transparency — industry payments
Based on CMS Open Payments, 2024; not all care is captured.
$319 across 10 records (Open Payments 2024)
Open Payments discloses payments and transfers of value (meals, travel, consulting, research, royalties) from drug and device makers to providers. This is a transparency signal, not a verdict — such payments are legal and common, and their presence is neither an endorsement nor a criticism. Source: CMS Open Payments, program year 2024.
Practice location
Mailing address
Additional practice locations (2)
- 8935 Shady HlsSan Antonio, TX 78254-5525Phone: (832) 771-7163
- 8935 Shady HlsSan Antonio, TX 78254-5525Phone: (832) 771-7163
Registry dates
- Enumerated
- 2018-11-20
- Last updated
- 2019-05-24
Frequently asked questions
- What is Addison Marshall's NPI number?
- Addison Marshall's National Provider Identifier (NPI) is 1366911265, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Addison Marshall's specialty?
- Addison Marshall is listed in the NPPES registry with a primary specialty of Physician Assistant (Physician Assistants & Advanced Practice Nursing Providers).
- Where is Addison Marshall located?
- Addison Marshall's practice location on file with NPPES is 4502 Medical Dr, San Antonio, TX 78229.
- What is Addison Marshall's phone number?
- The practice phone number listed in the NPPES registry for Addison Marshall is (210) 358-4000.
- Does Addison Marshall accept Medicare?
- Addison Marshall is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Addison Marshall's NPI active?
- Yes — Addison Marshall's NPI (1366911265) is active in the NPPES registry as of the last update on 2019-05-24.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.