DR. AN THIEN TANG M.D.
NPI 1841357589
Internal Medicine in Houston, TX

Q: What is An Tang's NPI number?

The NPI number for An Tang is 1841357589. It was assigned to this individual provider in the NPPES registry on January 2, 2007. The provider is also known as Andrew Tang.

Q: What is An Tang's specialty?

The primary specialty registered for this NPI is Internal Medicine with taxonomy code 207R00000X.

Q: When was this NPI record last updated?

The NPPES record for An Tang was last updated on March 5, 2026. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 7 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.

Active since January 02, 2007PECOS EnrolledAccepts Medicare Assignment

11978 WESTHEIMER RD STE B, HOUSTON, TX 77077(832) 406-4160(855) 540-2516 Get Directions Write a Review

NPPES record last updated: March 5, 2026. Verified against the NPPES registry weekly; last sync: October 18, 2026.

Record update history: Mar 5, 2026, Dec 2, 2021, Oct 2, 2020 (3 updates tracked since 2020).

On this page

About Dr. An Thien Tang M.d. NPPES

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

DR. AN THIEN TANG M.D. (NPI 1841357589) is an individual internal medicine provider in Houston, Texas, licensed in Texas (M5537) and active in the NPI registry since January 2007. He is enrolled in Medicare PECOS and is a graduate of Baylor College Of Medicine (2003).

NPPES Registry Identity

NPI1841357589

Entity TypeIndividualMale

Primary Taxonomy207R00000X

Provider Legal NameDR. AN THIEN TANGCredential: M.D.

Location Address11978 WESTHEIMER RD STE BHouston, TX 77077-6669

Mailing Address4700 Millenia Blvd Ste 650Orlando, FL 32839-6013 · (407) 533-6836 · Fax (407) 232-9316

Phone(832) 406-4160

Fax(855) 540-2516

Sole ProprietorNo

Medical School CMSBaylor College Of MedicineGraduated 2003

Enumeration DateJanuary 2, 2007

Last NPPES UpdateMarch 5, 20263 updates tracked since enumeration

NPPES CertifiedMarch 5, 2026

✔ NPI 1841357589 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses

★ Primary SpecialtyInternal MedicineAllopathic & Osteopathic Physicians

Taxonomy Code207R00000X

License✔ Licensed in TX · M5537

Definition

A physician who provides long-term, comprehensive care in the office and the hospital, managing both common and complex illness of adolescents, adults and the elderly. Internists are trained in the diagnosis and treatment of cancer, infections and diseases affecting the heart, blood, kidneys, joints and digestive, respiratory and vascular systems. They are also trained in the essentials of primary care internal medicine, which incorporates an understanding of disease prevention, wellness, substance abuse, mental health and effective treatment of common problems of the eyes, ears, skin, nervous system and reproductive organs.

11978 WESTHEIMER RD STE B, Houston, TX 77077

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Other Names 1

Other Name (5)Andrew Tang

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. An Thien Tang 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 ID4183703341

PECOS Enrollment IDI20080430000174

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

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

Centerwell Senior Primary Care (tx) PA

Same address

Internal Medicine

11978 WESTHEIMER RD STE B
Houston, TX 77077

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

NPI 1669054961 (346) 275-6750

Conviva Medical Center Management Of Texas, P.A.

166 mi

Internal Medicine

12602 TOEPPERWEIN RD STE 100
Live Oak, TX 78233

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

NPI 1770988990 (210) 654-0030

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 77077 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.

Other Providers at the Same Location NPPES 2

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

CENTERWELL SENIOR PRIMARY CARE (TX) PA

Internal Medicine

11978 WESTHEIMER RD STE B
HOUSTON, TX 77077

Harris County (346) 275-6750

DR. UCHEOMA D NWAOGWUGWU MD

Internal Medicine

11978 WESTHEIMER RD STE B
HOUSTON, TX 77077

Harris County (346) 275-6750

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 An Tang's NPI number?

The NPI number for An Tang is 1841357589. It was assigned to this individual provider in the NPPES registry on January 2, 2007. The provider is also known as Andrew Tang.

Where is An Tang located?

An Tang practices at 11978 Westheimer Rd Ste B, Houston, TX 77077. The listed phone number is (832) 406-4160.

What is An Tang's specialty?

The primary specialty registered for this NPI is Internal Medicine with taxonomy code 207R00000X.

Is An Tang enrolled in Medicare?

Yes. An Tang 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 An Tang's services?

According to the CMS Revalidation Reassignment List (October 2026 release), An Tang reassigns Medicare benefits to 2 organizations: Centerwell Senior Primary Care (tx) PA (Houston, TX) and Conviva Medical Center Management Of Texas, P.A. (Live Oak, 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 An Tang's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.

When was this NPI record last updated?

The NPPES record for An Tang was last updated on March 5, 2026. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 7 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.