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STEPHEN JOHN CHALMERS M.D.
NPI 1134166143
Internal Medicine - Nephrology in Arlington, TX

Active since May 31, 2006PECOS EnrolledAccepts Medicare Assignment
1132 S. BOWEN RD., ARLINGTON, TX 76013(817) 265-9700(817) 277-4164 Get Directions Write a Review

NPPES record last updated: August 18, 2010. Verified against the NPPES registry weekly; last sync: November 08, 2026.

About Stephen John Chalmers M.d. NPPES

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

STEPHEN JOHN CHALMERS M.D. (NPI 1134166143) is an individual nephrology provider in Arlington, Texas, licensed in Texas (M9916) and active in the NPI registry since May 2006. He is enrolled in Medicare PECOS, is affiliated with Texas Health Arlington Memorial Hospital, and is a graduate of University Of Cincinnati College Of Medicine (2002).

NPPES Registry Identity

NPI1134166143
Entity TypeIndividualMale
Primary Taxonomy207RN0300X
Provider Legal NameSTEPHEN JOHN CHALMERSCredential: M.D.
Location Address1132 S. BOWEN RD.Arlington, TX 76013
Mailing Address1132 S. Bowen Rd.Arlington, TX 76013 · (817) 265-9700 · Fax (817) 277-4164
Phone(817) 265-9700
Fax(817) 277-4164
Sole ProprietorNo
Medical School CMSUniversity Of Cincinnati College Of MedicineGraduated 2002
Enumeration DateMay 31, 2006
Last NPPES UpdateAugust 18, 2010
✔ NPI 1134166143 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses

★ Primary SpecialtyInternal Medicine · NephrologyAllopathic & Osteopathic Physicians
Taxonomy Code207RN0300X
License✔ Licensed in TX · M9916
Definition
An internist who treats disorders of the kidney, high blood pressure, fluid and mineral balance and dialysis of body wastes when the kidneys do not function. This specialist consults with surgeons about kidney transplantation.
1132 S. BOWEN RD., Arlington, TX 76013
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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

Stephen John Chalmers 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 ID2567530835
PECOS Enrollment IDI20081014000501
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 Stephen Chalmers reassigns Medicare billing to 1 organization. The organization bills Medicare for the services this provider delivers there.

North Texas Nephrology Associates PA
0.1 mi
Nephrology
1132 S BOWEN RD
Arlington, TX 76013
  • Reassigned Medicare billing, Texas enrollment
  • 4 clinicians in this Medicare group
NPI 1629107404 (817) 265-9700

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 9

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 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.
579 services164 patients
Dialysis services, 4 or more physician visits per month (20 years or older) 90960
Dialysis is a treatment that filters and purifies your blood using a machine. It helps keep your fluids and electrolytes in balance when the kidneys can't do their job. This service includes 4 or more visits per month with a physician to monitor your health and adjust your treatment as needed.
258 services44 patients
Established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more 99214
This is a routine check-up for patients who have previously visited our clinic. It involves a comprehensive review of your health and any ongoing treatments. The consultation lasts between 30-39 minutes, allowing enough time to discuss any concerns.
128 services52 patients
Established patient office or other outpatient visit with low level od decision making, if using time, 20 minutes or more 99213
This is a routine visit for patients who have already been seen by the healthcare provider. During this approximately 20-29 minute appointment, your health status will be evaluated and any necessary treatments or tests will be discussed. It's a chance to address any health concerns you may have.
99 services61 patients
Dialysis services, 2-3 physician visits per month (20 years or older) 90961
Dialysis is a treatment that performs the function of healthy kidneys if they're not working properly. It removes waste and excess fluid from your blood. 2-3 physician visits per month are recommended for monitoring your health and adjusting your treatment as needed. This service is available for those aged 20 years and older.
57 services25 patients
Initial hospital care with straightforward or low-level medical decision making, if using time, at least 55 minutes 99222
Initial hospital inpatient care is a service where a healthcare provider spends about 50 minutes per day overseeing your care while you're admitted in the hospital. This includes reviewing your health status, planning your treatment, and ensuring your safety and comfort.
46 services44 patients

Hospital Affiliations CMS Care Compare 5

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

Texas Health Arlington Memorial Hospital

Acute Care Hospitals · Arlington, TX
2/5 CMS rating
OwnershipVoluntary non-profit - Private
CMS Certification Number450064
Location800 W Randol Mill RdArlington, TX 76012 · Tarrant County
Emergency services Birthing friendly

Baylor Scott & White Medical Center Grapevine

Acute Care Hospitals · Grapevine, TX
4/5 CMS rating
OwnershipVoluntary non-profit - Private
CMS Certification Number450563
Location1650 W College StGrapevine, TX 76051 · Tarrant County
Emergency services Birthing friendly

Texas Health Harris Methodist Hurst-Euless-Bedford

Acute Care Hospitals · Bedford, TX
3/5 CMS rating
OwnershipVoluntary non-profit - Private
CMS Certification Number450639
Location1600 Hospital ParkwayBedford, TX 76022 · Tarrant County
Emergency services Birthing friendly

Medical City Arlington

Acute Care Hospitals · Arlington, TX
2/5 CMS rating
OwnershipProprietary
CMS Certification Number450675
Location3301 Matlock RoadArlington, TX 76015 · Tarrant County
Emergency services Birthing friendly

U S M D Hospital At Arlington L P

Acute Care Hospitals · Arlington, TX
OwnershipPhysician
CMS Certification Number450872
Location801 W Interstate 20Arlington, TX 76017 · Tarrant County
Emergency services

Physician Visit Costs CMS claims · ZIP area

Typical Medicare office-visit costs in the 76013 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
$129.63 typical visit price
range $56.47 – $171.07
Typical copayment $32.40 (range $14.11 – $42.76)
Most-billed visit code 99204
Established Patient
$99.68 typical visit price
range $18.18 – $139.68
Typical copayment $24.92 (range $4.54 – $34.92)
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.

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 Stephen Chalmers's NPI number?

The NPI number for Stephen Chalmers is 1134166143. It was assigned to this individual provider in the NPPES registry on May 31, 2006.

Where is Stephen Chalmers located?

Stephen Chalmers practices at 1132 S. Bowen Rd., Arlington, TX 76013. The listed phone number is (817) 265-9700.

What is Stephen Chalmers's specialty?

The primary specialty registered for this NPI is Internal Medicine, specializing in Nephrology, with taxonomy code 207RN0300X.

Is Stephen Chalmers enrolled in Medicare?

Yes. Stephen Chalmers 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 Stephen Chalmers's services?

According to the CMS Revalidation Reassignment List (October 2026 release), Stephen Chalmers reassigns Medicare benefits to North Texas Nephrology Associates PA (Arlington, 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 Stephen Chalmers's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.

What insurance does Stephen Chalmers 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 4 other insurers list Stephen Chalmers 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 Stephen Chalmers affiliated with any hospitals?

According to CMS data, Stephen Chalmers is affiliated with Texas Health Arlington Memorial Hospital, Baylor Scott & White Medical Center Grapevine, Texas Health Harris Methodist Hurst-Euless-Bedford, Medical City Arlington and U S M D Hospital At Arlington L P.

When was this NPI record last updated?

The NPPES record for Stephen Chalmers was last updated on August 18, 2010. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 16 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.