DR. TAMARA R CALLIS MD
NPI 1952588931
Pediatrics in Houston, TX

Q: What is Tamara Callis's NPI number?

The NPI number for Tamara Callis is 1952588931. It was assigned to this individual provider in the NPPES registry on January 22, 2008.

Q: What is Tamara Callis's specialty?

The primary specialty registered for this NPI is Pediatrics with taxonomy code 208000000X.

Q: When was this NPI record last updated?

The NPPES record for Tamara Callis was last updated on September 16, 2024. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 2 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.

Active since January 22, 2008PECOS Enrolled

3601 N MACGREGOR WAY, HOUSTON, TX 77004(713) 873-4700 Get Directions Write a Review

NPPES record last updated: September 16, 2024. Verified against the NPPES registry weekly; last sync: October 18, 2026.

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About Dr. Tamara R Callis Md NPPES

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

DR. TAMARA R CALLIS MD (NPI 1952588931) is an individual pediatrics provider in Houston, Texas, licensed in Texas (M8570) and active in the NPI registry since January 2008. She is enrolled in Medicare PECOS and maintains 2 additional practice locations.

NPPES Registry Identity

NPI1952588931

Entity TypeIndividualFemale

Primary Taxonomy208000000X

Provider Legal NameDR. TAMARA R CALLISCredential: MD

Location Address3601 N MACGREGOR WAYHouston, TX 77004-8004

Mailing Address2 Greenway Plz, Suite 900Houston, TX 77046-0297 · (713) 798-1835

Phone(713) 873-4700

Sole ProprietorNo

Enumeration DateJanuary 22, 2008

Last NPPES UpdateSeptember 16, 2024

NPPES CertifiedSeptember 16, 2024

✔ NPI 1952588931 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses

★ Primary SpecialtyPediatricsAllopathic & Osteopathic Physicians

Taxonomy Code208000000X

License✔ Licensed in TX · M8570

Definition

A pediatrician is concerned with the physical, emotional and social health of children from birth to young adulthood. Care encompasses a broad spectrum of health services ranging from preventive healthcare to the diagnosis and treatment of acute and chronic diseases. A pediatrician deals with biological, social and environmental influences on the developing child, and with the impact of disease and dysfunction on development.

3601 N MACGREGOR WAY, Houston, TX 77004

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Secondary Practice Locations 2

Location 113940 Bonham StHouston, TX 77015-5108 · Phone (713) 497-0950

Location 21504 Taub LoopHouston, TX 77030-1608 · Phone (713) 873-2000

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. Tamara R Callis Md 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 Tamara Callis reassigns Medicare billing to 1 organization. The organization bills Medicare for the services this provider delivers there.

Baylor College Of Medicine

2.1 mi

Family Medicine

1504 TAUB LOOP
Houston, TX 77030

Reassigned Medicare billing, Texas enrollment
2,296 clinicians in this Medicare group

NPI 1053352914 (713) 873-2000

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 77004 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

$90.40 typical visit price

range $58.24 – $176.98

Typical copayment $22.60 (range $14.56 – $44.24)

Most-billed visit code 99203

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 20

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

JUDY GONZALEZ

Pharmacist (Pharmacist Clinician (PhC)/ Clinical Pharmacy Specialist)

3601 N MACGREGOR WAY
HOUSTON, TX 77004

Harris County (713) 873-4790

MS. SUSAN MARIE CROUCH PTA, CMLD

Physical Therapy Assistant

3601 N MACGREGOR WAY
HOUSTON, TX 77004

Harris County (713) 873-3840

ANGELLE SANDER PHD

Clinical Neuropsychologist

3601 N MACGREGOR WAY
HOUSTON, TX 77004

Harris County (713) 873-4712

AMY CAO M.D.

Physical Medicine & Rehabilitation

3601 N MACGREGOR WAY, SUITE 240
HOUSTON, TX 77004

Harris County (713) 873-3875

DR. JANITZIO JIOVANNI GUZMAN MD

Internal Medicine (Infectious Disease)

3601 N MACGREGOR WAY
HOUSTON, TX 77004

Harris County (713) 873-3700

MAYOWA VICTOR OYELAMI PT, DPT

Physical Therapist (Neurology)

3601 N MACGREGOR WAY
HOUSTON, TX 77004

Harris County (713) 873-3700

ALLISON IRENE MITCHELL TORREGROSSA PHARMD, BS PHARM

Pharmacist

3601 N MACGREGOR WAY, QUENTIN MEASE COMMUNITY HOSPITAL PHARMACY
HOUSTON, TX 77004

Harris County (713) 873-4734

CORY PAUL PERRIN

Physical Therapist (Orthopedic)

3601 N MACGREGOR WAY
HOUSTON, TX 77004

Harris County (713) 873-4645

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 Tamara Callis's NPI number?

The NPI number for Tamara Callis is 1952588931. It was assigned to this individual provider in the NPPES registry on January 22, 2008.

Where is Tamara Callis located?

Tamara Callis practices at 3601 N Macgregor Way, Houston, TX 77004. The listed phone number is (713) 873-4700.

What is Tamara Callis's specialty?

The primary specialty registered for this NPI is Pediatrics with taxonomy code 208000000X.

Is Tamara Callis enrolled in Medicare?

Yes. Tamara Callis is registered in the Medicare PECOS enrollment system.

Which organization bills Medicare for Tamara Callis's services?

According to the CMS Revalidation Reassignment List (October 2026 release), Tamara Callis reassigns Medicare benefits to Baylor College Of Medicine (Houston, TX). The 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 Tamara Callis's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.

What insurance does Tamara Callis accept?

Health plans from Blue Cross and Blue Shield of Texas list Tamara Callis 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 Tamara Callis was last updated on September 16, 2024. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 2 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.