DR. GREGORY D. ANDREASSIAN M.D.,P.A.
NPI 1619973120
Surgery in Fredericksburg, TX

Q: What is Gregory Andreassian's NPI number?

The NPI number for Gregory Andreassian is 1619973120. It was assigned to this individual provider in the NPPES registry on June 21, 2005.

Q: What is Gregory Andreassian's specialty?

The primary specialty registered for this NPI is Surgery with taxonomy code 208600000X.

Active since June 21, 2005PECOS Enrolled

205 W WINDCREST ST STE 130, FREDERICKSBURG, TX 78624(830) 997-6773(830) 997-1961 Get Directions Write a Review

NPPES record last updated: July 21, 2022. Verified against the NPPES registry weekly; last sync: October 18, 2026.

Record update history: Jul 21, 2022, Jun 28, 2017, Nov 20, 2015 (3 updates tracked since 2015).

On this page

About Dr. Gregory D. Andreassian M.d.,p.a. NPPES

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

DR. GREGORY D. ANDREASSIAN M.D.,P.A. (NPI 1619973120) is an individual surgery provider in Fredericksburg, Texas, licensed in Texas (H0136) and active in the NPI registry since June 2005. He is enrolled in Medicare PECOS.

NPPES Registry Identity

NPI1619973120

Entity TypeIndividualMale

Primary Taxonomy208600000X

Provider Legal NameDR. GREGORY D. ANDREASSIANCredential: M.D.,P.A.

Location Address205 W WINDCREST ST STE 130Fredericksburg, TX 78624-4478

Mailing Address205 W Windcrest St, Ste 130Fredericksburg, TX 78624-4478 · (830) 997-6773 · Fax (830) 997-1961

Phone(830) 997-6773

Fax(830) 997-1961

Sole ProprietorNo

Enumeration DateJune 21, 2005

Last NPPES UpdateJuly 21, 20223 updates tracked since enumeration

✔ NPI 1619973120 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses

★ Primary SpecialtySurgeryAllopathic & Osteopathic Physicians

Taxonomy Code208600000X

License✔ Licensed in TX · H0136

Definition

A general surgeon has expertise related to the diagnosis - preoperative, operative and postoperative management - and management of complications of surgical conditions in the following areas: alimentary tract; abdomen; breast, skin and soft tissue; endocrine system; head and neck surgery; pediatric surgery; surgical critical care; surgical oncology; trauma and burns; and vascular surgery. General surgeons increasingly provide care through the use of minimally invasive and endoscopic techniques. Many general surgeons also possess expertise in transplantation surgery, plastic surgery and cardiothoracic surgery.

205 W WINDCREST ST STE 130, Fredericksburg, TX 78624

Open in Google Maps ↗

Accepted Insurance

The full list of accepted plans is on the Insurance tab. Issuers include Blue Cross and Blue Shield of Texas.Insurance ›

Medicare Participation & PECOS CMS

Medicare enrollment, assignment, billing reassignment, and ordering and referring status from CMS.

Medicare Enrollment Status

✔

Enrolled in Medicare (PECOS)

Dr. Gregory D. Andreassian M.d.,p.a. is registered in the CMS Provider Enrollment, Chain and Ownership System (PECOS).

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 Gregory Andreassian reassigns Medicare billing to 1 organization. The organization bills Medicare for the services this provider delivers there.

Dhhs Phs Naihs Chinle Comprehensive Health Care Facility

731 mi

General Acute Care Hospital

NAVAJO ROUTE 64
Tsaile, AZ 86556

Reassigned Medicare billing, Texas enrollment
476 clinicians in this Medicare group

NPI 1538185715 (928) 724-3600

Source: CMS Revalidation Reassignment List, October 2026 release. Reassignment records can lag staffing changes; confirm a current affiliation with the organization.

Physician Visit Costs CMS claims · ZIP area

Typical Medicare office-visit costs in the 78624 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

$68.55 typical visit price

range $17.52 – $136.11

Typical copayment $17.13 (range $4.38 – $34.02)

Most-billed visit code 99213

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 4

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

Ostomy skin barrier, solid 4 x 4 or equivalent, extended wear, without built-in convexity, each A4385

DME-Orthotic Devices · category DF010N

3 suppliers20 claims260 services$4.72 avg. paid by Medicare

Ostomy skin barrier, with flange (solid, flexible, or accordion), extended wear, with built-in convexity, 4 x 4 inches or smaller, each A4407

DME-Orthotic Devices · category DF010N

2 suppliers14 claims170 services$8.41 avg. paid by Medicare

Ostomy pouch, drainable; for use on barrier with non-locking flange, with filter (2 piece system), each A4425

DME-Orthotic Devices · category DF010N

3 suppliers20 claims310 services$3.34 avg. paid by Medicare

Adhesive remover, wipes, any type, each A4456

DME-Medical/Surgical Supplies · category DA000N

3 suppliers11 claims580 services$0.21 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.

ANDREW N BOWSER MD

Surgery (Vascular Surgery)