1. Home
  2. Directory
  3. Texas
  4. Houston
  5. Internal Medicine
  6. NPI Profile

DR. MARK CHIAWEI HWANG MD
NPI 1366798647
Internal Medicine - Rheumatology in Houston, TX

Active since July 24, 2012PECOS EnrolledAccepts Medicare Assignment
82.38/100
CMS Quality Rating
6410 FANNIN ST STE 450, HOUSTON, TX 77030(713) 500-6536(713) 500-6530 Get Directions Write a Review

NPPES record last updated: October 29, 2018. Verified against the NPPES registry weekly; last sync: August 16, 2026.

Record update history: Oct 29, 2018, May 19, 2017 (2 updates tracked since 2017).

About Dr. Mark Chiawei Hwang Md NPPES

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

DR. MARK CHIAWEI HWANG MD (NPI 1366798647) is an individual rheumatology provider in Houston, Texas, licensed in Texas (R3110) and active in the NPI registry since July 2012. He is enrolled in Medicare PECOS, is affiliated with Memorial Hermann - Texas Medical Center, and is a graduate of Saint Louis University School Of Medicine (2012).

NPPES Registry Identity

NPI1366798647
Entity TypeIndividualMale
Primary Taxonomy207RR0500X
Provider Legal NameDR. MARK CHIAWEI HWANGCredential: MD
Location Address6410 FANNIN ST STE 450Houston, TX 77030-3008
Mailing Address6410 Fannin St Ste 450Houston, TX 77030-3008 · (713) 486-3100 · Fax (713) 512-2246
Phone(713) 500-6536
Fax(713) 500-6530
Sole ProprietorNo
Medical School CMSSaint Louis University School Of MedicineGraduated 2012
Enumeration DateJuly 24, 2012
Last NPPES UpdateOctober 29, 20182 updates tracked since enumeration
✔ NPI 1366798647 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses 2

★ Primary SpecialtyInternal Medicine · RheumatologyAllopathic & Osteopathic Physicians
Taxonomy Code207RR0500X
License✔ Licensed in TX · R3110
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.
Also ListedInternal MedicineTaxonomy 207R00000X · License R3110 (TX)
6410 FANNIN ST STE 450, Houston, TX 77030
Open in Google Maps ↗

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. Mark Chiawei Hwang 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 ID4486904935
PECOS Enrollment IDI20180905001159
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

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.
27 services17 patients

Hospital Affiliations CMS Care Compare

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

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 8

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

DR. PETER KUO-YEN WUNG M.D.
Internal Medicine (Rheumatology)
6410 FANNIN ST STE 450
HOUSTON, TX 77030
Harris County (713) 486-3100
BOCHRA JANDALI MD
Internal Medicine (Rheumatology)
6410 FANNIN ST STE 450
HOUSTON, TX 77030
Harris County (713) 500-6900
DR. MANJARI DEVIDI M.D
Internal Medicine (Rheumatology)
6410 FANNIN ST STE 450
HOUSTON, TX 77030
Harris County (713) 486-3100
COURTNEY JANE MCCRAY MD
Internal Medicine (Rheumatology)
6410 FANNIN ST STE 450
HOUSTON, TX 77030
Harris County (713) 486-3100
DR. ZSUZSANNA HORTOBAGYI MCMAHAN MD, MHS
Internal Medicine (Rheumatology)
6410 FANNIN ST STE 450
HOUSTON, TX 77030
Harris County (713) 486-3100
CONNOR PHILIPS VERSHEL MD
Internal Medicine (Rheumatology)
6410 FANNIN ST STE 450
HOUSTON, TX 77030
Harris County (713) 486-3100
ELENI TINIAKOU M.D.
Internal Medicine (Rheumatology)
6410 FANNIN ST STE 450
HOUSTON, TX 77030
Harris County (713) 500-6900
DR. SUSAN SEAGO M.D.
Internal Medicine (Rheumatology)
6410 FANNIN ST STE 450
HOUSTON, TX 77030
Harris County (713) 486-3100

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 Mark Hwang's NPI number?

The NPI number for Mark Hwang is 1366798647. It was assigned to this individual provider in the NPPES registry on July 24, 2012.

Where is Mark Hwang located?

Mark Hwang practices at 6410 Fannin St Ste 450, Houston, TX 77030. The listed phone number is (713) 500-6536.

What is Mark Hwang's specialty?

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

Is Mark Hwang enrolled in Medicare?

Yes. Mark Hwang 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 Mark Hwang 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 Mark Hwang 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 Mark Hwang affiliated with any hospitals?

According to CMS data, Mark Hwang is affiliated with Memorial Hermann - Texas Medical Center.

When was this NPI record last updated?

The NPPES record for Mark Hwang was last updated on October 29, 2018. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 7 years 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.