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DR. BISTRA GUEORGUIEVA VLASSAKOVA M.D.
NPI 1790812428
Anesthesiology in Houston, TX

Active since February 28, 2007PECOS EnrolledAccepts Medicare Assignment
6411 FANNIN ST, HOUSTON, TX 77030(713) 500-6201 Get Directions Write a Review

NPPES record last updated: May 20, 2026. Verified against the NPPES registry weekly; last sync: November 01, 2026.

Record update history: May 20, 2026, Jan 13, 2026, Dec 18, 2018 (3 updates tracked since 2018).

About Dr. Bistra Gueorguieva Vlassakova M.d. NPPES

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

DR. BISTRA GUEORGUIEVA VLASSAKOVA M.D. (NPI 1790812428) is an individual anesthesiology provider in Houston, Texas, licensed in Texas (W2798) and active in the NPI registry since February 2007. She is enrolled in Medicare PECOS and is a graduate of Other (1993).

NPPES Registry Identity

NPI1790812428
Entity TypeIndividualFemale
Primary Taxonomy207L00000X
Provider Legal NameDR. BISTRA GUEORGUIEVA VLASSAKOVACredential: M.D.
Location Address6411 FANNIN STHouston, TX 77030-1501
Mailing Address6431 Fannin StHouston, TX 77030-1501 · (937) 500-6201
Phone(713) 500-6201
Sole ProprietorYes
Medical School CMSOtherGraduated 1993
Enumeration DateFebruary 28, 2007
Last NPPES UpdateMay 20, 20263 updates tracked since enumeration
NPPES CertifiedMay 20, 2026
✔ NPI 1790812428 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses

★ Primary SpecialtyAnesthesiologyAllopathic & Osteopathic Physicians
Taxonomy Code207L00000X
License✔ Licensed in TX · W2798
Definition
An anesthesiologist is trained to provide pain relief and maintenance, or restoration, of a stable condition during and immediately following an operation or an obstetric or diagnostic procedure. The anesthesiologist assesses the risk of the patient undergoing surgery and optimizes the patient's condition prior to, during and after surgery. In addition to these management responsibilities, the anesthesiologist provides medical management and consultation in pain management and critical care medicine. Anesthesiologists diagnose and treat acute, long-standing and cancer pain problems; diagnose and treat patients with critical illnesses or severe injuries; direct resuscitation in the care of patients with cardiac or respiratory emergencies, including the need for artificial ventilation; and supervise post-anesthesia recovery.
6411 FANNIN ST, Houston, TX 77030
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Accepted Insurance

The full list of accepted plans is on the Insurance tab. Issuers include Blue Cross and Blue Shield of Texas, Oscar Insurance Company, Taro Health 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

Dr. Bistra Gueorguieva Vlassakova 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 ID2961584313
PECOS Enrollment IDI20260206002842
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 Reassignments

2

Medicare enrollment records show Bistra Vlassakova reassigns Medicare billing to 2 organizations. Each organization bills Medicare for the services this provider delivers there; the nearest is listed first.

Ut Physicians
0.1 mi
Anesthesiology
6410 FANNIN ST, 1500
Houston, TX 77030
  • Reassigned Medicare billing, Texas enrollment
  • 3,111 clinicians in this Medicare group
NPI 1033157821 (832) 325-7325
Chmc Anesthesia Foundation Inc
1,606 mi
Pediatric Anesthesiology
300 LONGWOOD AVE
Boston, MA 02115
  • Reassigned Medicare billing, Massachusetts enrollment
  • 256 clinicians in this Medicare group
NPI 1831268754 (617) 919-1340

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

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.

HASHIM ZAIDI M.D.
Emergency Medicine
6411 FANNIN ST
HOUSTON, TX 77030
Harris County (713) 500-7878
DAVID BALTRUSAITIS MD
Radiology (Diagnostic Radiology)
6411 FANNIN ST
HOUSTON, TX 77030
Harris County (713) 797-5929
CYNTHIA MARSHA DANIS RN
Registered Nurse (Critical Care Medicine)
6411 FANNIN ST
HOUSTON, TX 77030
Harris County (713) 704-4000
MR. MICHAEL KENNETH HOWZE JR.
Anesthesiologist Assistant
6411 FANNIN ST
HOUSTON, TX 77030
Harris County (713) 500-7160
STEPHEN M LARSON D.M.D.
Dentist (General Practice)
6411 FANNIN ST
HOUSTON, TX 77030
Harris County (713) 500-6200
STEPHEN G HECHT M.D.
Emergency Medicine
6411 FANNIN ST
HOUSTON, TX 77030
Harris County (713) 704-4060
VLADIMIR MELNIKOV M.D.
Anesthesiology
6411 FANNIN ST
HOUSTON, TX 77030
Harris County (713) 500-6200
MRS. CAROL JEAN UNDERWOOD BSN RN CCRC
Registered Nurse (Critical Care Medicine)
6411 FANNIN ST
HOUSTON, TX 77030
Harris County (713) 704-4230

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 Bistra Vlassakova's NPI number?

The NPI number for Bistra Vlassakova is 1790812428. It was assigned to this individual provider in the NPPES registry on February 28, 2007.

Where is Bistra Vlassakova located?

Bistra Vlassakova practices at 6411 Fannin St, Houston, TX 77030. The listed phone number is (713) 500-6201.

What is Bistra Vlassakova's specialty?

The primary specialty registered for this NPI is Anesthesiology with taxonomy code 207L00000X.

Is Bistra Vlassakova enrolled in Medicare?

Yes. Bistra Vlassakova 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.

Which organizations bill Medicare for Bistra Vlassakova's services?

According to the CMS Revalidation Reassignment List (October 2026 release), Bistra Vlassakova reassigns Medicare benefits to 2 organizations: Ut Physicians (Houston, TX) and Chmc Anesthesia Foundation Inc (Boston, MA). Each reassignment is filed with Medicare on form CMS-855R, signed by both the clinician and the organization, and lets the organization bill Medicare and receive payment for Bistra Vlassakova's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.

What insurance does Bistra Vlassakova accept?

Health plans from Blue Cross and Blue Shield of Texas, Oscar Insurance Company, Taro Health and UnitedHealthcare list Bistra Vlassakova 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.

When was this NPI record last updated?

The NPPES record for Bistra Vlassakova was last updated on May 20, 2026. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 5 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.