Allison Marsh, MD
NPI 1952891475 · Family Medicine Physician · San Marcos, TX
Enrolled with Medicare as Practitioner - Family Practice · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Allison Marsh, MD is a Family Medicine Physician provider in San Marcos, TX (NPI 1952891475).
Provider details
- NPI number
- 1952891475
- Entity type
- Individual
- Primary specialty
- Family Medicine PhysicianAllopathic & Osteopathic Physicians
- Credential
- MD
- Sex
- Female
- Sole proprietor
- No
- License
- T8271 (TX)
Specialties & taxonomies
Allopathic & Osteopathic Physicians
Allopathic & Osteopathic Physicians
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure25% of score
8 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
346 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) |
|---|---|---|
| Visit Complexity Inherent to Evaluation and Management Associated With Medical Care Services That Serve As the Continuing Focal Point for All Needed Health Care Services And/Or With Medical Care Services That Are Part of Ongoing Care Related to a Patient'SG2211 | 107 | $16 |
| Established Patient Office Or Other Outpatient Visit With Moderate Level of Decision Making, If Using Time, 30 Minutes Or More99214 | 96 | $120 |
| Established Patient Office Or Other Outpatient Visit With Low Level OD Decision Making, If Using Time, 20 Minutes Or More99213 | 48 | $84 |
| Established Patient Office Or Other Outpatient Visit With High Level of Medical Decision Making, If Using Time, 40 Minutes Or More99215 | 25 | $171 |
| Annual Wellness Visit, Includes a Personalized Prevention Plan of Service (pps), Subsequent VisitG0439 | 24 | $129 |
What this provider prescribes (Medicare Part D)
Top drugs by Medicare Part D claim volume, 2024 · 45 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Atorvastatin Calcium | 103 | 37 |
| Levothyroxine Sodium | 97 | 30 |
| Lisinopril | 94 | 29 |
| Rosuvastatin Calcium | 68 | 20 |
| Metformin Hcl | 56 | 17 |
| Amlodipine Besylate | 54 | 20 |
| Gabapentin |
Transparency — industry payments
Based on CMS Open Payments, 2024; not all care is captured.
$21 across 1 record (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)
- 2698 Patterson RdGrand Junction, CO 81506-8818Phone: (970) 298-2800
- 2430 S Ih 35San Marcos, TX 78666-5906Phone: (512) 878-6946
Registry dates
- Enumerated
- 2018-05-10
- Last updated
- 2025-01-15
- Certified
- 2025-01-15
Frequently asked questions
- What is Allison Marsh's NPI number?
- Allison Marsh's National Provider Identifier (NPI) is 1952891475, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Allison Marsh's specialty?
- Allison Marsh is listed in the NPPES registry with a primary specialty of Family Medicine Physician (Allopathic & Osteopathic Physicians).
- Where is Allison Marsh located?
- Allison Marsh's practice location on file with NPPES is 1320 Wonder World Dr Ste 101, San Marcos, TX 78666-7558.
- What is Allison Marsh's phone number?
- The practice phone number listed in the NPPES registry for Allison Marsh is (512) 396-3911.
- Does Allison Marsh accept Medicare?
- Allison Marsh is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Allison Marsh's NPI active?
- Yes — Allison Marsh's NPI (1952891475) is active in the NPPES registry as of the last update on 2025-01-15.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.