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DR. SHERVIN ASSASSI M.D.
NPI 1043259567
Internal Medicine - Rheumatology in Houston, TX

Active since June 06, 2006PECOS EnrolledAccepts Medicare Assignment
82.38/100
CMS Quality Rating
6431 FANNIN ST, MSB 5.270, HOUSTON, TX 77030(713) 500-6900(713) 500-0580 Get Directions Write a Review

NPPES record last updated: June 24, 2025. Verified against the NPPES registry weekly; last sync: November 01, 2026.

About Dr. Shervin Assassi M.d. NPPES

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

DR. SHERVIN ASSASSI M.D. (NPI 1043259567) is an individual rheumatology provider in Houston, Texas, licensed in Texas (M2251) and active in the NPI registry since June 2006. He is enrolled in Medicare PECOS, is affiliated with Memorial Hermann - Texas Medical Center, and maintains a secondary practice location in Houston.

NPPES Registry Identity

NPI1043259567
Entity TypeIndividualMale
Primary Taxonomy207RR0500X
Provider Legal NameDR. SHERVIN ASSASSICredential: M.D.
Location Address6431 FANNIN ST, MSB 5.270Houston, TX 77030-1501
Mailing Address6431 Fannin St, Msb 5.270Houston, TX 77030-1501 · (713) 500-6900 · Fax (713) 500-0580
Phone(713) 500-6900
Fax(713) 500-0580
Sole ProprietorNo
Medical School CMSOtherGraduated 1999
Enumeration DateJune 6, 2006
Last NPPES UpdateJune 24, 2025
NPPES CertifiedJune 24, 2025
✔ NPI 1043259567 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses

★ Primary SpecialtyInternal Medicine · RheumatologyAllopathic & Osteopathic Physicians
Taxonomy Code207RR0500X
License✔ Licensed in TX · M2251
Definition
An internist who treats diseases of joints, muscle, bones and tendons. This specialist diagnoses and treats arthritis, back pain, muscle strains, common athletic injuries and collagen diseases.
6431 FANNIN ST, Houston, TX 77030
Open in Google Maps ↗

Secondary Practice Location 1

Location 11515 Holcombe BlvdHouston, TX 77030-4000 · Phone (713) 792-6161

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, billing reassignment, and ordering and referring status from CMS.

Medicare Enrollment Status

✔

Enrolled in Medicare and accepts Medicare assignment

Dr. Shervin Assassi 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 ID345267118
PECOS Enrollment IDI20051031000963
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 Shervin Assassi 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
Physicians Referral Service
0.4 mi
Multi-Specialty
1515 HOLCOMBE BLVD
Houston, TX 77030
  • Reassigned Medicare billing, Texas enrollment
  • 2,675 clinicians in this Medicare group
NPI 1073574810 (713) 792-6161

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

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.
52 services38 patients

Hospital Affiliations CMS Care Compare 2

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

Memorial Hermann - Texas Medical Center

Acute Care Hospitals · Houston, TX
3/5 CMS rating
OwnershipVoluntary non-profit - Private
CMS Certification Number450068
Location6411 FanninHouston, TX 77030 · Harris County
Emergency services Birthing friendly

Memorial Hermann Hospital System

Acute Care Hospitals · Houston, TX
3/5 CMS rating
OwnershipVoluntary non-profit - Private
CMS Certification Number450184
Location1635 North Loop WestHouston, TX 77008 · Harris County
Emergency services Birthing friendly

Physician Visit Costs CMS claims · ZIP area

Typical Medicare office-visit costs in the 77030 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
$134.06 typical visit price
range $58.24 – $176.98
Typical copayment $33.51 (range $14.56 – $44.24)
Most-billed visit code 99204
Established Patient
$102.71 typical visit price
range $18.60 – $143.93
Typical copayment $25.67 (range $4.65 – $35.98)
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.

82.38/100
MIPS Final ScoreMerit-based Incentive Payment System · CMS Quality Payment Program
Scored as part of a group practice
Quality79.23
Promoting Interoperability100
Improvement Activities40
Cost58.5

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.

DR. STUART MASON FRASER M.D.
Psychiatry & Neurology (Neurology with Special Qualifications in Child Neurology)
6431 FANNIN ST, MSB 3.151
HOUSTON, TX 77030
Harris County (713) 500-5800
AMY ROSSI MD
Emergency Medicine
6431 FANNIN ST, JJL 431
HOUSTON, TX 77030
Harris County (713) 500-7882
MATTHEW KHOA NGUYEN
Student in an Organized Health Care Education/Training Program
6431 FANNIN ST
HOUSTON, TX 77030
Harris County (713) 500-6113
MARY WAYNE PELTIER MD
Student in an Organized Health Care Education/Training Program
6431 FANNIN ST
HOUSTON, TX 77030
Harris County (713) 500-5010
HANNA MAVRIC DO
Student in an Organized Health Care Education/Training Program
6431 FANNIN ST
HOUSTON, TX 77030
Harris County (713) 500-7882
DR. DAVIDE CATTANO MD
Anesthesiology
6431 FANNIN ST, MSB 5.020
HOUSTON, TX 77030
Harris County (713) 500-6235
MICHAEL ANTHONY HOLZMAN
Orthopaedic Surgery
6431 FANNIN ST, SUITE JJL 310
HOUSTON, TX 77030
Harris County (713) 500-5154
SHUBHANGI MEHRA
Student in an Organized Health Care Education/Training Program
6431 FANNIN ST
HOUSTON, TX 77030
Harris County (713) 500-0798

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 Shervin Assassi's NPI number?

The NPI number for Shervin Assassi is 1043259567. It was assigned to this individual provider in the NPPES registry on June 6, 2006.

Where is Shervin Assassi located?

Shervin Assassi practices at 6431 Fannin St Msb 5.270, Houston, TX 77030. The listed phone number is (713) 500-6900.

What is Shervin Assassi's specialty?

The primary specialty registered for this NPI is Internal Medicine, specializing in Rheumatology, with taxonomy code 207RR0500X.

Is Shervin Assassi enrolled in Medicare?

Yes. Shervin Assassi 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 Shervin Assassi's services?

According to the CMS Revalidation Reassignment List (October 2026 release), Shervin Assassi reassigns Medicare benefits to 2 organizations: Ut Physicians (Houston, TX) and Physicians Referral Service (Houston, TX). 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 Shervin Assassi's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.

What insurance does Shervin Assassi 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 3 other insurers list Shervin Assassi 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 Shervin Assassi affiliated with any hospitals?

According to CMS data, Shervin Assassi is affiliated with Memorial Hermann - Texas Medical Center and Memorial Hermann Hospital System.

When was this NPI record last updated?

The NPPES record for Shervin Assassi was last updated on June 24, 2025. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 16 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.