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CHARLES W ZAVALA M.D.
NPI 1598805632
Internal Medicine - Pulmonary Disease in Brownsville, TX

Active since February 07, 2007PECOS EnrolledAccepts Medicare Assignment
4401 MORRISON RD, BROWNSVILLE, TX 78526(956) 541-0162 Get Directions Write a Review

NPPES record last updated: February 3, 2022. Verified against the NPPES registry weekly; last sync: November 08, 2026.

About Charles W Zavala M.d. NPPES

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

CHARLES W ZAVALA M.D. (NPI 1598805632) is an individual pulmonary disease provider in Brownsville, Texas, licensed in Texas (F0099) and active in the NPI registry since February 2007. He is enrolled in Medicare PECOS, is affiliated with Valley Regional Medical Center, and is a graduate of Other (1968).

NPPES Registry Identity

NPI1598805632
Entity TypeIndividualMale
Primary Taxonomy207RP1001X
Provider Legal NameCHARLES W ZAVALACredential: M.D.
Location Address4401 MORRISON RDBrownsville, TX 78526-9607
Mailing Address4401 Morrison RdBrownsville, TX 78526-9607 · (956) 541-0162 · Fax (956) 554-9686
Phone(956) 541-0162
Sole ProprietorYes
Medical School CMSOtherGraduated 1968
Enumeration DateFebruary 7, 2007
Last NPPES UpdateFebruary 3, 2022
NPPES CertifiedFebruary 3, 2022
✔ NPI 1598805632 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses

★ Primary SpecialtyInternal Medicine · Pulmonary DiseaseAllopathic & Osteopathic Physicians
Taxonomy Code207RP1001X
License✔ Licensed in TX · F0099
Definition
An internist who treats diseases of the lungs and airways. The pulmonologist diagnoses and treats cancer, pneumonia, pleurisy, asthma, occupational and environmental diseases, bronchitis, sleep disorders, emphysema and other complex disorders of the lungs.
4401 MORRISON RD, Brownsville, TX 78526
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Other Names 1

Other Name (5)Charles William Zavala M.d.

Other Identifiers 1

Medicaid098349602TX

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

Charles W Zavala 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 ID4486838455
PECOS Enrollment IDI20110421000796
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 Charles Zavala reassigns Medicare billing to 1 organization. The organization bills Medicare for the services this provider delivers there.

Charles W.Zavala,m.D.,p.A.
4.2 mi
Pulmonary Disease
840 W PRICE RD
Brownsville, TX 78520
  • Reassigned Medicare billing, Texas enrollment
NPI 1952606642 (956) 541-0162

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 3

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.

Subsequent hospital care with straightforward or low level of medical decision making, per day, if using time, at least 25 minutes 99231
Follow-up hospital inpatient care is a daily service where a healthcare professional checks on your health progress during your hospital stay. Each session typically lasts 15 minutes, involving updates on your condition and adjustments to your treatment plan, if necessary.
63 services17 patients
Subsequent hospital care with moderate levelof medical decision making, if using time, at least 35 minutes 99232
Follow-up hospital inpatient care involves daily check-ups while you're admitted in the hospital. Typically, a healthcare provider spends about 25 minutes each day reviewing your condition, adjusting treatment if needed, and answering any questions you might have.
31 services15 patients
Initial hospital care with moderate level of medical decision making, if using time, at least 75 minutes 99223
Initial hospital inpatient care per day, typically 70 minutes, refers to the daily medical service provided to patients admitted to the hospital. This includes a comprehensive evaluation, diagnosis, treatment plan, and monitoring of your health condition. It ensures your well-being during your hospital stay.
20 services20 patients

Hospital Affiliations CMS Care Compare

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

Valley Regional Medical Center

Acute Care Hospitals · Brownsville, TX
2/5 CMS rating
OwnershipProprietary
CMS Certification Number450662
Location100 A Alton GloorBrownsville, TX 78526 · Cameron County
Emergency services Birthing friendly

Physician Visit Costs CMS claims · ZIP area

Typical Medicare office-visit costs in the 78526 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
$126.40 typical visit price
range $54.84 – $166.88
Typical copayment $31.60 (range $13.71 – $41.72)
Most-billed visit code 99204
Established Patient
$97.05 typical visit price
range $17.52 – $136.11
Typical copayment $24.26 (range $4.38 – $34.02)
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.

Referred Medical Equipment & Supplies CMS DME claims 6

Durable medical equipment, devices and supplies this provider ordered from DME suppliers for patients, from Medicare fee-for-service claims.

Portable gaseous oxygen system, rental; includes portable container, regulator, flowmeter, humidifier, cannula or mask, and tubing E0431
DME-Oxygen and Supplies · category DC000N
2 suppliers17 claims19 services$15.77 avg. paid by Medicare
Home ventilator, any type, used with non-invasive interface, (e.g., mask, chest shell) E0466
DME-Other DME · category DE005N
2 suppliers17 claims17 services$913.39 avg. paid by Medicare
Continuous positive airway pressure (cpap) device E0601
DME-Other DME · category DE001N
1 supplier15 claims15 services$32.93 avg. paid by Medicare
Oxygen concentrator, single delivery port, capable of delivering 85 percent or greater oxygen concentration at the prescribed flow rate E1390
DME-Oxygen and Supplies · category DC002N
3 suppliers30 claims32 services$86.94 avg. paid by Medicare
Standard wheelchair K0001
DME-Wheelchairs · category DD000N
2 suppliers17 claims17 services$11.92 avg. paid by Medicare
Portable gaseous oxygen system, rental; home compressor used to fill portable oxygen cylinders; includes portable containers, regulator, flowmeter, humidifier, cannula or mask, and tubing K0738
DME-Oxygen and Supplies · category DC000N
1 supplier12 claims12 services$33.72 avg. paid by Medicare
Dollar amounts are the average Medicare paid the supplier per service. They are not the cost to the patient.

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 Charles Zavala's NPI number?

The NPI number for Charles Zavala is 1598805632. It was assigned to this individual provider in the NPPES registry on February 7, 2007. The provider is also known as Charles William Zavala M.D..

Where is Charles Zavala located?

Charles Zavala practices at 4401 Morrison Rd, Brownsville, TX 78526. The listed phone number is (956) 541-0162.

What is Charles Zavala's specialty?

The primary specialty registered for this NPI is Internal Medicine, specializing in Pulmonary Disease, with taxonomy code 207RP1001X.

Is Charles Zavala enrolled in Medicare?

Yes. Charles Zavala 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 organization bills Medicare for Charles Zavala's services?

According to the CMS Revalidation Reassignment List (October 2026 release), Charles Zavala reassigns Medicare benefits to Charles W.Zavala,m.D.,p.A. (Brownsville, 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 Charles Zavala's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.

What insurance does Charles Zavala 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 1 other insurer list Charles Zavala 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 Charles Zavala affiliated with any hospitals?

According to CMS data, Charles Zavala is affiliated with Valley Regional Medical Center.

When was this NPI record last updated?

The NPPES record for Charles Zavala was last updated on February 3, 2022. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 4 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.