CHARLES CALAIS D.O
NPI 1831416197
Internal Medicine - Allergy & Immunology in San Antonio, TX

Q: What is Charles Calais's NPI number?

The NPI number for Charles Calais is 1831416197. It was assigned to this individual provider in the NPPES registry on April 27, 2010.

Q: What is Charles Calais's specialty?

The primary specialty registered for this NPI is Internal Medicine, specializing in Allergy & Immunology, with taxonomy code 207RA0201X.

Q: When was this NPI record last updated?

The NPPES record for Charles Calais was last updated on January 20, 2025. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 21 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 April 27, 2010PECOS EnrolledAccepts Medicare Assignment

1219 MCCULLOUGH AVE, SAN ANTONIO, TX 78212(210) 226-3500(210) 226-3638 Get Directions Write a Review

NPPES record last updated: January 20, 2025. Verified against the NPPES registry weekly; last sync: November 01, 2026.

Record update history: Nov 5, 2021, Dec 11, 2020, Aug 26, 2016 (3 updates tracked since 2016).

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About Charles Calais D.o NPPES

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

CHARLES CALAIS D.O (NPI 1831416197) is an individual allergy & immunology provider in San Antonio, Texas, licensed in Texas (R8534) and active in the NPI registry since April 2010. He is enrolled in Medicare PECOS and is a graduate of Philadelphia College Of Osteopathic Medicine (2010).

NPPES Registry Identity

NPI1831416197

Entity TypeIndividualMale

Primary Taxonomy207RA0201X

Provider Legal NameCHARLES CALAISCredential: D.O

Location Address1219 MCCULLOUGH AVESan Antonio, TX 78212-4811

Mailing Address1219 Mccullough AveSan Antonio, TX 78212-4811 · (210) 226-3500

Phone(210) 226-3500

Fax(210) 226-3638

Sole ProprietorYes

Medical School CMSPhiladelphia College Of Osteopathic MedicineGraduated 2010

Enumeration DateApril 27, 2010

Last NPPES UpdateJanuary 20, 20253 updates tracked since enumeration

NPPES CertifiedJanuary 20, 2025

✔ NPI 1831416197 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses

★ Primary SpecialtyInternal Medicine · Allergy & ImmunologyAllopathic & Osteopathic Physicians

Taxonomy Code207RA0201X

Licenses✔ Licensed in TX · R8534✔ Licensed in VA · 0102203064

Definition

An internist doctor of osteopathy that specializes in the treatment of allergy and immunologic disorders. A doctor of osteopathy that is board eligible/certified by the American Osteopathic Board of Internal Medicine can obtain a Certificate of Special Qualifications in the field of Allergy & Immunology.

1219 MCCULLOUGH AVE, San Antonio, TX 78212

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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 Calais D.o 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 ID8325469166

PECOS Enrollment IDI20200706001672

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 Calais reassigns Medicare billing to 1 organization. The organization bills Medicare for the services this provider delivers there.

All-American Allergy Asthma & Immunology Center

Same address

Allergy

1219 MCCULLOUGH AVE
San Antonio, TX 78212

Reassigned Medicare billing, Texas enrollment

NPI 1356966287 (210) 226-3500

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 7

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.

Test for allergy using allergenic extract 95004

An allergy test with allergenic extract is a diagnostic method to identify substances causing allergic reactions. Small amounts of common allergens are introduced to your body, usually through skin pricks or blood tests. Your body's response helps determine your allergies.

2,910 services32 patients

Professional service for preparation and provision of 1 or more antigens 95165

This service involves the creation and supply of antigens, substances that stimulate your immune system to fight diseases. These antigens can be used in vaccines or allergy tests to help your body build defenses against specific health threats.

2,830 services31 patients

Professional service for multiple injections of allergen 95117

The professional service for multiple injections of allergens involves administering small doses of specific allergens into your body. This is done to help your immune system become less sensitive to them, reducing your allergic reaction over time. It's a safe, effective way to manage allergies.

470 services33 patients

Established patient office or other outpatient visit with high level of medical decision making, if using time, 40 minutes or more 99215

This service involves a follow-up appointment for existing patients, lasting between 40 to 54 minutes. During this time, your healthcare provider will assess your current health status, discuss any changes or concerns, review your treatment plan, and answer any questions you may have.

217 services75 patients

Professional service for single injection of allergen 95115

A single allergen injection is a procedure where a small amount of a specific allergen is injected into your body. This is done to test your body's reaction to the allergen or to help your immune system become less sensitive to it, reducing allergic symptoms.

196 services21 patients

Test to measure expiratory airflow and volume changes before and after medication administration 94060

This procedure measures how air flows in and out of your lungs. It's done before and after medication to see if the treatment improves your breathing. It's a simple, non-invasive test that involves breathing into a device called a spirometer.

108 services39 patients

Physician Visit Costs CMS claims · ZIP area

Typical Medicare office-visit costs in the 78212 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

$68.55 typical visit price

range $17.52 – $136.11

Typical copayment $17.13 (range $4.38 – $34.02)

Most-billed visit code 99213

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 3

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

ALL-AMERICAN ALLERGY ASTHMA & IMMUNOLOGY CENTER

Allergy & Immunology (Allergy)

1219 MCCULLOUGH AVE
SAN ANTONIO, TX 78212

Bexar County (210) 226-3500

HEARTLINK HOME HEALTH, INC

Home Health

1219 MCCULLOUGH AVE
SAN ANTONIO, TX 78212

Bexar County (210) 737-8800

HEARTLINK HOME HEALTH INC.

Home Health

1219 MCCULLOUGH AVE
SAN ANTONIO, TX 78212

Bexar County (210) 737-8800

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 Calais's NPI number?

The NPI number for Charles Calais is 1831416197. It was assigned to this individual provider in the NPPES registry on April 27, 2010.

Where is Charles Calais located?

Charles Calais practices at 1219 Mccullough Ave, San Antonio, TX 78212. The listed phone number is (210) 226-3500.

What is Charles Calais's specialty?

The primary specialty registered for this NPI is Internal Medicine, specializing in Allergy & Immunology, with taxonomy code 207RA0201X.

Is Charles Calais enrolled in Medicare?

Yes. Charles Calais 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 Calais's services?

According to the CMS Revalidation Reassignment List (October 2026 release), Charles Calais reassigns Medicare benefits to All-American Allergy Asthma & Immunology Center (San Antonio, 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 Calais's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.

What insurance does Charles Calais accept?

Health plans from Ambetter Health, Ambetter from Arizona Complete Health, Ambetter from Arkansas Health & Wellness, Ambetter from Louisiana Healthcare Connections and Ambetter from Superior HealthPlan and 10 other insurers list Charles Calais 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 Charles Calais was last updated on January 20, 2025. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 21 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.