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DR. CHARLES A. MASON M.D.
NPI 1447245048
Anesthesiology in Oak Lawn, IL

Active since September 20, 2005PECOS EnrolledAccepts Medicare Assignment
4440 W 95TH ST, OAK LAWN, IL 60453(708) 684-5745 Get Directions Write a Review

NPPES record last updated: October 9, 2024. Verified against the NPPES registry weekly; last sync: October 18, 2026.

Record update history: Oct 9, 2024, Apr 5, 2024 (2 updates tracked since 2024).

About Dr. Charles A. Mason M.d. NPPES

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

DR. CHARLES A. MASON M.D. (NPI 1447245048) is an individual anesthesiology provider in Oak Lawn, Illinois, licensed in Illinois (036-171983) and active in the NPI registry since September 2005. He is enrolled in Medicare PECOS, is affiliated with Christus Southeast Texas- St Elizabeth, and maintains 2 additional practice locations.

NPPES Registry Identity

NPI1447245048
Entity TypeIndividualMale
Primary Taxonomy207L00000X
Provider Legal NameDR. CHARLES A. MASONCredential: M.D.
Location Address4440 W 95TH STOak Lawn, IL 60453-2600
Mailing AddressPo Box 735044Chicago, IL 60673-5044 · (800) 326-2250
Phone(708) 684-5745
Sole ProprietorNo
Medical School CMSOtherGraduated 1997
Enumeration DateSeptember 20, 2005
Last NPPES UpdateOctober 9, 20242 updates tracked since enumeration
NPPES CertifiedOctober 9, 2024
✔ NPI 1447245048 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses

★ Primary SpecialtyAnesthesiologyAllopathic & Osteopathic Physicians
Taxonomy Code207L00000X
Licenses✔ Licensed in IL · 036-171983✔ Licensed in TX · L2448✔ Licensed in WI · 4032
Definition
An anesthesiologist is trained to provide pain relief and maintenance, or restoration, of a stable condition during and immediately following an operation or an obstetric or diagnostic procedure. The anesthesiologist assesses the risk of the patient undergoing surgery and optimizes the patient's condition prior to, during and after surgery. In addition to these management responsibilities, the anesthesiologist provides medical management and consultation in pain management and critical care medicine. Anesthesiologists diagnose and treat acute, long-standing and cancer pain problems; diagnose and treat patients with critical illnesses or severe injuries; direct resuscitation in the care of patients with cardiac or respiratory emergencies, including the need for artificial ventilation; and supervise post-anesthesia recovery.
4440 W 95TH ST, Oak Lawn, IL 60453
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Secondary Practice Locations 2

Location 1755 N 11th St, Suite P3600Beaumont, TX 77702-1501 · Phone (409) 838-5214
Location 22900 W Oklahoma AveMilwaukee, WI 53215-4330 · Phone (414) 649-6000

Other Identifiers 1

Medicaid100269640WI

Accepted Insurance

The full list of accepted plans is on the Insurance tab. Issuers include Baylor Scott and White Health Plan, Blue Cross and Blue Shield of Texas, Molina Healthcare 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

Dr. Charles A. Mason 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 ID6608945530
PECOS Enrollment IDI20100619000159
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

4

Medicare enrollment records show Charles Mason reassigns Medicare billing to 4 organizations. Each organization bills Medicare for the services this provider delivers there; the nearest is listed first.

Grasshopper Anesthesia Services PLLC
793 mi
Nurse Anesthetist, Certified Registered
3610 N UNIVERSITY DR
Nacogdoches, TX 75965
  • Reassigned Medicare billing, Texas enrollment
  • 118 clinicians in this Medicare group
NPI 1932635752 (936) 560-9599
Texas Anesthesia Partners, PLLC
797 mi
Anesthesiology
1403 DARTMOUTH DR
Southlake, TX 76092
  • Reassigned Medicare billing, Texas enrollment
  • 447 clinicians in this Medicare group
NPI 1144673468 (817) 917-9582
Emergenchealth PLLC
819 mi
Anesthesiology
4100 INTERNATIONAL PLZ STE 800
Fort Worth, TX 76109
  • Reassigned Medicare billing, Texas enrollment
  • 1,612 clinicians in this Medicare group
NPI 1467970897 (972) 861-1270
Anesthesia Associates Group PLLC
879 mi
Anesthesiology
3440 FANNIN ST STE B
Beaumont, TX 77701
  • Reassigned Medicare billing, Texas enrollment
  • 76 clinicians in this Medicare group
NPI 1477078202 (409) 838-5214

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 4

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.

Anesthesia for lens surgery 00142
Anesthesia for lens surgery involves administering medication to numb the eye area, ensuring you feel no pain during the procedure. This can be a local anesthetic (numbing only the eye area) or general (where you're asleep). It helps make the surgery comfortable and stress-free.
206 services190 patients
Anesthesia for other procedure on eye 00140
Anesthesia for an eye procedure involves administering medication to numb your eye and surrounding area, ensuring you feel no pain during the operation. It can be local (only the eye area) or general (whole body). It's safe and helps make the procedure comfortable.
19 services18 patients
Anesthesia for nerve block and injection procedure, prone position 01992
Anesthesia for nerve block and injection is a procedure to numb specific areas, reducing pain. You'll be positioned face-down (prone) for optimal access to the treatment area. The anesthetic is injected near the nerve, blocking pain signals to the brain.
15 services14 patients
Anesthesia for other procedure on esophagus, stomach, or upper small bowel using an endoscope 00731
This procedure involves the use of an endoscope, a flexible tube with a light and camera, to examine your esophagus, stomach, or upper small bowel. Anesthesia ensures you are comfortable and pain-free during the procedure.
12 services11 patients

Hospital Affiliations CMS Care Compare

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

Christus Southeast Texas- St Elizabeth

Acute Care Hospitals · Beaumont, TX
3/5 CMS rating
OwnershipVoluntary non-profit - Private
CMS Certification Number450034
Location2830 Calder AvenueBeaumont, TX 77702 · Jefferson County
Emergency services Birthing friendly

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.

DR. MARK ADRIAN FAASSE MD
Urology
4440 W 95TH ST
OAK LAWN, IL 60453
Cook County (708) 684-4557
DR. MANDY LUMA ENSHIWAT M.D.
Internal Medicine
4440 W 95TH ST
OAK LAWN, IL 60453
Cook County (708) 684-8000
DR. KIM MARIE MIILLER MA, PSYD
Psychologist (Clinical)
4440 W 95TH ST
OAK LAWN, IL 60453
Cook County (708) 684-7482
JENNIFER MARSIGLIO
Occupational Therapist (Physical Rehabilitation)
4440 W 95TH ST
OAK LAWN, IL 60453
Cook County (708) 684-5425
TRACI LYNN TAGUE MA, CCC-SLP
Speech-Language Pathologist
4440 W 95TH ST
OAK LAWN, IL 60453
Cook County (708) 684-1989
ELIZABETH A FOLLIARD OTR/L
Occupational Therapist
4440 W 95TH ST
OAK LAWN, IL 60453
Cook County (708) 684-5369
MICHAEL CIRONE M.D.
Emergency Medicine
4440 W 95TH ST
OAK LAWN, IL 60453
Cook County (708) 684-5375
ANNA MANILLA
Speech-Language Pathologist
4440 W 95TH ST
OAK LAWN, IL 60453
Cook County (248) 701-7523

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 Mason's NPI number?

The NPI number for Charles Mason is 1447245048. It was assigned to this individual provider in the NPPES registry on September 20, 2005.

Where is Charles Mason located?

Charles Mason practices at 4440 W 95th St, Oak Lawn, IL 60453. The listed phone number is (708) 684-5745.

What is Charles Mason's specialty?

The primary specialty registered for this NPI is Anesthesiology with taxonomy code 207L00000X.

Is Charles Mason enrolled in Medicare?

Yes. Charles Mason 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 Charles Mason's services?

According to the CMS Revalidation Reassignment List (October 2026 release), Charles Mason reassigns Medicare benefits to 4 organizations: Grasshopper Anesthesia Services PLLC (Nacogdoches, TX), Texas Anesthesia Partners, PLLC (Southlake, TX), Emergenchealth PLLC (Fort Worth, TX) and Anesthesia Associates Group PLLC (Beaumont, 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 Charles Mason's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.

What insurance does Charles Mason accept?

Health plans from Baylor Scott and White Health Plan, Blue Cross and Blue Shield of Texas, Molina Healthcare and UnitedHealthcare list Charles Mason 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 Mason affiliated with any hospitals?

According to CMS data, Charles Mason is affiliated with Christus Southeast Texas- St Elizabeth.

When was this NPI record last updated?

The NPPES record for Charles Mason was last updated on October 9, 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.