DR. WILLIAM K DESCHNER M.D.
NPI 1023003563
Internal Medicine - Gastroenterology in San Marcos, TX

Q: What is William Deschner's NPI number?

The NPI number for William Deschner is 1023003563. It was assigned to this individual provider in the NPPES registry on September 12, 2005.

Q: What is William Deschner's specialty?

The primary specialty registered for this NPI is Internal Medicine, specializing in Gastroenterology, with taxonomy code 207RG0100X.

Q: When was this NPI record last updated?

The NPPES record for William Deschner was last updated on February 16, 2017. NPI Profile syncs with the weekly NPPES data releases published by CMS.

Active since September 12, 2005PECOS EnrolledAccepts Medicare Assignment

79.87/100

CMS Quality Rating

1305 WONDER WORLD DR, SUITE 200, SAN MARCOS, TX 78666(512) 754-8676(512) 754-8680 Get Directions Write a Review

NPPES record last updated: February 16, 2017. Verified against the NPPES registry weekly; last sync: July 26, 2026.

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About Dr. William K Deschner M.d. NPPES

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

DR. WILLIAM K DESCHNER M.D. (NPI 1023003563) is an individual gastroenterology provider in San Marcos, Texas, licensed in Texas (G4977) and active in the NPI registry since September 2005. He is enrolled in Medicare PECOS, is affiliated with Guadalupe Regional Medical Center, and is a graduate of Baylor College Of Medicine (1983).

NPPES Registry Identity

NPI1023003563

Entity TypeIndividualMale

Primary Taxonomy207RG0100X

Provider Legal NameDR. WILLIAM K DESCHNERCredential: M.D.

Location Address1305 WONDER WORLD DR, SUITE 200San Marcos, TX 78666-7546

Mailing AddressPo Box 35629Dallas, TX 75235-0629 · (512) 754-8676 · Fax (512) 754-8680

Phone(512) 754-8676

Fax(512) 754-8680

Sole ProprietorNo

Medical School CMSBaylor College Of MedicineGraduated 1983

Enumeration DateSeptember 12, 2005

Last NPPES UpdateFebruary 16, 2017

✔ NPI 1023003563 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses

★ Primary SpecialtyInternal Medicine · GastroenterologyAllopathic & Osteopathic Physicians

Taxonomy Code207RG0100X

License✔ Licensed in TX · G4977

Definition

An internist who specializes in diagnosis and treatment of diseases of the digestive organs including the stomach, bowels, liver and gallbladder. This specialist treats conditions such as abdominal pain, ulcers, diarrhea, cancer and jaundice and performs complex diagnostic and therapeutic procedures using endoscopes to visualize internal organs.

1305 WONDER WORLD DR, San Marcos, TX 78666

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Other Identifiers 2

Medicare UPINE60670TX

Medicare PIN00G01ATX

Accepted Insurance

The full list of accepted plans is on the Insurance tab. Issuers include Ambetter from Arizona Complete Health, Ambetter from Arkansas Health & Wellness, Ambetter from Louisiana Healthcare Connections and more.Insurance ›

Medicare Participation & PECOS CMS

Medicare enrollment, assignment, and ordering and referring status from the CMS PECOS system.

Medicare Enrollment Status

✔

Enrolled in Medicare and accepts Medicare assignment

Dr. William K Deschner 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.

PECOS PAC ID840367256

PECOS Enrollment IDI20081125000794

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.

Areas of Expertise CMS Part B claims 16

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.

Removal of polyps or growths of large bowel using an endoscope with mechanical snare 45385

This procedure involves using a thin, flexible tube called an endoscope to examine the large bowel. If any abnormal growths or polyps are found, a tool called a mechanical snare is used to remove them. This is a common method to prevent potential health issues.

180 services180 patients

Biopsy of large bowel using a flexible endoscope 45380

A biopsy of the large bowel using a flexible endoscope is a procedure where a thin, flexible tube with a camera is inserted through the rectum to examine the bowel. If abnormal tissue is found, a small sample is taken for further examination. This helps in diagnosing conditions like inflammation, polyps, or cancer.

150 services150 patients

Biopsy of esophagus, stomach, and/or upper small bowel using a flexible endoscope 43239

This procedure involves using a thin, flexible tube with a light and camera, known as an endoscope, to examine the esophagus, stomach, and upper part of the small intestine. Small tissue samples are taken for further examination to help diagnose various conditions.

133 services132 patients

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.

107 services99 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.

92 services89 patients

New patient office or other outpatient visit with moderate level of medical decision making, if using time, 45 minutes or more 99204

This is a first-time office or outpatient visit lasting between 45-59 minutes. The healthcare provider evaluates your health, discusses your medical history, and may suggest further tests or treatments. It's an opportunity to ask questions and understand your health better.

75 services75 patients

Insertion of guide wire with dilation of esophagus using a flexible endoscope 43248

This is a procedure where a thin tube, called an endoscope, is gently passed through your mouth into your esophagus. A guide wire is then inserted to help widen any narrow areas. This helps improve swallowing and reduce discomfort.

59 services54 patients

Colorectal cancer screening; colonoscopy on individual at high risk G0105

Colorectal cancer screening, specifically a colonoscopy, is a preventive measure for those at high risk. A thin, flexible tube with a camera inspects the colon to spot any abnormal growths. This test helps detect potential issues early, enhancing the effectiveness of treatment.

56 services56 patients

Initial hospital care with straightforward or low-level medical decision making, if using time, at least 55 minutes 99222

Initial hospital inpatient care is a service where a healthcare provider spends about 50 minutes per day overseeing your care while you're admitted in the hospital. This includes reviewing your health status, planning your treatment, and ensuring your safety and comfort.

39 services39 patients

New patient office or other outpatient visit with low level of medical decision making, if using time, 30 minutes or more 99203

This service involves an initial office or outpatient visit for a new patient. The healthcare professional will spend 30-44 minutes understanding your health history, current issues, and discussing possible treatment plans. It's a comprehensive evaluation to start your healthcare journey.

28 services28 patients

Diagnostic exam of esophagus, stomach, and/or upper small bowel using a flexible endoscope 43235

This procedure, known as an upper endoscopy, involves inserting a thin, flexible tube with a camera down the throat to examine the esophagus, stomach, and upper small bowel. It helps diagnose conditions like ulcers or inflammation.

21 services20 patients

Subsequent hospital care with moderate levelof medical decision making, if using time, at least 35 minutes 99232

Follow-up hospital inpatient care involves daily check-ups while you're admitted in the hospital. Typically, a healthcare provider spends about 25 minutes each day reviewing your condition, adjusting treatment if needed, and answering any questions you might have.

18 services15 patients

Subsequent hospital care with moderate levelof medical decision making, if using time, at least 50 minutes 99233

Follow-up hospital inpatient care per day typically involves a 35-minute check-up by your healthcare provider. This service includes monitoring your health progress, adjusting your treatment plan if needed, and answering any questions you may have about your condition or care.

15 services11 patients

New patient office or other outpatient visit with straightforward medical decision making, if using time, 15 minutes or more 99202

This service involves an initial visit to the doctor's office or other outpatient setting. It typically lasts between 15-29 minutes. The doctor will review your medical history, conduct a physical examination, and discuss your health concerns. It's a chance to establish your health baseline and address any immediate medical issues.

14 services14 patients

Colorectal cancer screening; colonoscopy on individual not meeting criteria for high risk G0121

Colorectal cancer screening, such as a colonoscopy, is a preventive measure to detect early signs of cancer in the large intestine. For individuals not at high risk, it's typically recommended at age 50. A small, flexible tube with a camera is used to examine your colon. It's a safe, effective way to catch issues early.

14 services14 patients

Diagnostic exam of large bowel using a flexible endoscope 45378

This procedure, known as a colonoscopy, involves using a flexible tube with a light and camera to examine the large intestine. It helps detect any abnormalities such as polyps or inflammation. It's a standard procedure to ensure gut health.

12 services12 patients

Hospital Affiliations CMS Care Compare 5

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

Guadalupe Regional Medical Center

Acute Care Hospitals · Seguin, TX

3/5 CMS rating

OwnershipGovernment - Local

CMS Certification Number450104

Location1215 E Court StSeguin, TX 78155 · Guadalupe County

Emergency services Birthing friendly

Memorial Hospital

Acute Care Hospitals · Gonzales, TX

OwnershipGovernment - Hospital District or Authority

CMS Certification Number450235

Location1110 North Sarah Dewitt DriveGonzales, TX 78629 · Gonzales County

Birthing friendly

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

Ascension Seton Edgar B Davis

Critical Access Hospitals · Luling, TX

OwnershipVoluntary non-profit - Private

CMS Certification Number451371

Location130 Hays StreetLuling, TX 78648 · Caldwell County

Emergency services

Resolute Health Hospital

Acute Care Hospitals · New Braunfels, TX

3/5 CMS rating

OwnershipProprietary

CMS Certification Number670098

Location555 Creekside Xing,New Braunfels, TX 78130 · Comal 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

$126.40 typical visit price

range $54.84 – $166.88

Typical copayment $31.60 (range $13.71 – $41.72)

Most-billed visit code 99204

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.

Medicare Quality Performance CMS QPP · MIPS

Performance in the CMS Quality Payment Program: the MIPS final score across four weighted categories, and the individual quality measures reported to Medicare.

79.87/100

MIPS Final ScoreMerit-based Incentive Payment System · CMS Quality Payment Program

Scored as part of a group practice

Quality

68.55

Promoting Interoperability

100

Improvement Activities

Cost

64.36

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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.

RX MANAGEMENT CONSULTANTS

Pharmacist

1305 WONDER WORLD DR, STE 102
SAN MARCOS, TX 78666

Hays County (512) 392-6777

WENDELL M HOLLADAY CRNA

Nurse Anesthetist, Certified Registered

1305 WONDER WORLD DR, STE. 105
SAN MARCOS, TX 78666

Hays County (512) 353-8161

DR. CARLOS NEGHME M.D.

Internal Medicine (Gastroenterology)

1305 WONDER WORLD DR, SUITE 200
SAN MARCOS, TX 78666

Hays County (512) 754-8676

BUDA MEDICAL AND SURGICAL CLINIC

Internal Medicine

1305 WONDER WORLD DR, STE 206
SAN MARCOS, TX 78666

Hays County (512) 396-1525

DR. TERESA LYNN IRWIN MD

Obstetrics & Gynecology (Urogynecology and Reconstructive Pelvic Surgery)

1305 WONDER WORLD DR, SUITE 209
SAN MARCOS, TX 78666

Hays County (512) 396-7575

MS. DEBORAH YOUNG HALL RNC,WHCNP

Nurse Practitioner (Women's Health)

1305 WONDER WORLD DR, SUITE 209
SAN MARCOS, TX 78666

Hays County (512) 396-7575

MRS. CAROL ANN COX GARNER MSN,CS,FNP

Nurse Practitioner (Family)

1305 WONDER WORLD DR, SUITE 209
SAN MARCOS, TX 78666

Hays County (512) 396-7575

MR. JESUS NAJIB SAHAD M.D.

Internal Medicine (Pulmonary Disease)

1305 WONDER WORLD DR, STE 209
SAN MARCOS, TX 78666

Hays County (512) 353-6400

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 William Deschner's NPI number?

The NPI number for William Deschner is 1023003563. It was assigned to this individual provider in the NPPES registry on September 12, 2005.

Where is William Deschner located?

William Deschner practices at 1305 Wonder World Dr Suite 200, San Marcos, TX 78666. The listed phone number is (512) 754-8676.

What is William Deschner's specialty?

The primary specialty registered for this NPI is Internal Medicine, specializing in Gastroenterology, with taxonomy code 207RG0100X.

Is William Deschner enrolled in Medicare?

Yes. William Deschner 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.

What insurance does William Deschner accept?

Health plans from Ambetter from Arizona Complete Health, Ambetter from Arkansas Health & Wellness, Ambetter from Louisiana Healthcare Connections, Ambetter from Superior HealthPlan and Ambetter of Oklahoma and 4 other insurers list William Deschner 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 William Deschner affiliated with any hospitals?

According to CMS data, William Deschner is affiliated with Guadalupe Regional Medical Center, Memorial Hospital, Christus Santa Rosa Hospital-San Marcos, Ascension Seton Edgar B Davis and Resolute Health Hospital.

When was this NPI record last updated?

The NPPES record for William Deschner was last updated on February 16, 2017. NPI Profile syncs with the weekly NPPES data releases published by CMS.