ALLISON MARSH MD
NPI 1952891475
Family Medicine in San Marcos, TX

Q: What is Allison Marsh's NPI number?

The NPI number for Allison Marsh is 1952891475. It was assigned to this individual provider in the NPPES registry on May 10, 2018.

Q: What is Allison Marsh's specialty?

The primary specialty registered for this NPI is Family Medicine with taxonomy code 207Q00000X.

Q: When was this NPI record last updated?

The NPPES record for Allison Marsh was last updated on January 15, 2025. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 21 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.

Active since May 10, 2018PECOS EnrolledAccepts Medicare Assignment

1320 WONDER WORLD DR STE 101, SAN MARCOS, TX 78666(512) 396-3911 Get Directions Write a Review

NPPES record last updated: January 15, 2025. Verified against the NPPES registry weekly; last sync: October 25, 2026.

Record update history: Aug 8, 2022, Nov 22, 2021, May 13, 2019 and 1 more (4 updates tracked since 2018).

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About Allison Marsh Md NPPES

Official registry information on file with the National Plan and Provider Enumeration System.

ALLISON MARSH MD (NPI 1952891475) is an individual family medicine provider in San Marcos, Texas, licensed in Colorado (DR.0065609) and active in the NPI registry since May 2018. She is enrolled in Medicare PECOS, is affiliated with Christus Santa Rosa Hospital-san Marcos, and maintains 2 additional practice locations.

NPPES Registry Identity

NPI1952891475

Entity TypeIndividualFemale

Primary Taxonomy207Q00000X

Provider Legal NameALLISON MARSHCredential: MD

Location Address1320 WONDER WORLD DR STE 101San Marcos, TX 78666-7558

Mailing Address2698 Patterson RdGrand Junction, CO 81506-8818

Phone(512) 396-3911

Sole ProprietorNo

Medical School CMSUniversity Of South Alabama College Of MedicineGraduated 2018

Enumeration DateMay 10, 2018

Last NPPES UpdateJanuary 15, 20254 updates tracked since enumeration

NPPES CertifiedJanuary 15, 2025

✔ NPI 1952891475 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses

★ Primary SpecialtyFamily MedicineAllopathic & Osteopathic Physicians

Taxonomy Code207Q00000X

Licenses✔ Licensed in CO · DR.0065609✔ Licensed in TX · T8271

Definition

Family Medicine is the medical specialty which is concerned with the total health care of the individual and the family. It is the specialty in breadth which integrates the biological, clinical, and behavioral sciences. The scope of family medicine is not limited by age, sex, organ system, or disease entity.

1320 WONDER WORLD DR STE 101, San Marcos, TX 78666

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Secondary Practice Locations 2

Location 12430 S Ih 35San Marcos, TX 78666-5906 · Phone (512) 878-6946

Location 22698 Patterson RdGrand Junction, CO 81506-8818 · Phone (970) 298-2800

Accepted Insurance

The full list of accepted plans is on the Insurance tab. Issuers include Blue Cross and Blue Shield of Texas, CHRISTUS Health Plan, Community First and more.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

Allison Marsh 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.

PECOS PAC ID1557611647

PECOS Enrollment IDI20220818003753

Eligible to Order & Refer✔ Part B Labs & Imaging✔ Durable Medical Equipment✔ Home Health Agency✔ Power Mobility DevicesPer the CMS Ordering and Referring file. Eligibility means Medicare pays claims that this provider orders or refers for these categories.

Medicare Billing Reassignment

Medicare enrollment records show Allison Marsh reassigns Medicare billing to 1 organization. The organization bills Medicare for the services this provider delivers there.

Christus Trinity Clinic Texas

233 mi

Family Medicine

520 DOUGLAS BLVD
Tyler, TX 75702

Reassigned Medicare billing, Texas enrollment
2,745 clinicians in this Medicare group

NPI 1285684225 (903) 315-4119

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 7

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.

Established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more 99214

This is a routine check-up for patients who have previously visited our clinic. It involves a comprehensive review of your health and any ongoing treatments. The consultation lasts between 30-39 minutes, allowing enough time to discuss any concerns.

96 services55 patients

Established patient office or other outpatient visit with low level od decision making, if using time, 20 minutes or more 99213

This is a routine visit for patients who have already been seen by the healthcare provider. During this approximately 20-29 minute appointment, your health status will be evaluated and any necessary treatments or tests will be discussed. It's a chance to address any health concerns you may have.

48 services40 patients

Established patient office or other outpatient visit with high level of medical decision making, if using time, 40 minutes or more 99215

This service involves a follow-up appointment for existing patients, lasting between 40 to 54 minutes. During this time, your healthcare provider will assess your current health status, discuss any changes or concerns, review your treatment plan, and answer any questions you may have.

25 services19 patients

Annual wellness visit, includes a personalized prevention plan of service (pps), subsequent visit G0439

An annual wellness visit is a yearly appointment with your primary care provider to create or update a personalized prevention plan. This plan helps prevent illness based on your current health and risk factors. It's a subsequent visit, meaning it follows an initial assessment.

24 services24 patients

Hemoglobin a1c level 83036

Hemoglobin A1c (HbA1c) is a test that measures your average blood sugar level over the past 2-3 months. It's used to monitor how well diabetes is being controlled. High levels may indicate that your diabetes treatment plan needs adjustment.

19 services13 patients

Insertion of needle into vein for collection of blood sample 36415

This procedure involves inserting a small needle into a vein, typically in your arm, to collect a blood sample. It's a quick and simple process to help diagnose or monitor health conditions. You may feel a small prick, but discomfort is minimal.

15 services15 patients

Hospital Affiliations CMS Care Compare

Hospitals where this provider delivers care, identified from recent Medicare claims and place-of-service records.

Christus Santa Rosa Hospital-San Marcos

Acute Care Hospitals · San Marcos, TX

2/5 CMS rating

OwnershipVoluntary non-profit - Church

CMS Certification Number450272

Location1301 Wonder World DriveSan Marcos, TX 78666 · Hays County

Emergency services Birthing friendly

Physician Visit Costs CMS claims · ZIP area

Typical Medicare office-visit costs in the 78666 ZIP code area, from fee-for-service claims. These are area statistics, not this provider’s prices; actual charges vary by service and coverage.

New Patient

$84.92 typical visit price

range $54.84 – $166.88

Typical copayment $21.23 (range $13.71 – $41.72)

Most-billed visit code 99203

Established Patient

$97.05 typical visit price

range $17.52 – $136.11

Typical copayment $24.26 (range $4.38 – $34.02)

Most-billed visit code 99214

Amounts reflect what Medicare beneficiaries in this ZIP area are typically charged for office visits. Patients with other coverage should check their individual plans.

Referred Medical Equipment & Supplies CMS DME claims 2

Durable medical equipment, devices and supplies this provider ordered from DME suppliers for patients, from Medicare fee-for-service claims.

Oxygen concentrator, single delivery port, capable of delivering 85 percent or greater oxygen concentration at the prescribed flow rate E1390

DME-Oxygen and Supplies · category DC002N

2 suppliers32 claims32 services$80.45 avg. paid by Medicare

Portable gaseous oxygen system, rental; home compressor used to fill portable oxygen cylinders; includes portable containers, regulator, flowmeter, humidifier, cannula or mask, and tubing K0738

DME-Oxygen and Supplies · category DC000N

1 supplier12 claims12 services$35.47 avg. paid by Medicare

Dollar amounts are the average Medicare paid the supplier per service. They are not the cost to the patient.

Other Providers at the Same Location NPPES 8

Providers registered at the same practice address, or within the immediate area, according to the NPPES registry.

JAMES EDWARD JANKOWSKI PA

Physician Assistant