Stephen Chalmers, M.D.
NPI 1134166143 · Nephrology Physician · Arlington, TX
Enrolled with Medicare as Practitioner - Nephrology · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Stephen Chalmers, M.D. is a Nephrology Physician provider in Arlington, TX (NPI 1134166143).
Provider details
- NPI number
- 1134166143
- Entity type
- Individual
- Primary specialty
- Nephrology PhysicianAllopathic & Osteopathic Physicians
- Credential
- M.D.
- Sex
- Male
- Sole proprietor
- No
- License
- M9916 (TX)
Specialties & taxonomies
Allopathic & Osteopathic Physicians
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure25% of score
20 yrs in NPPES registry
- Profile completeness25% of score
100% of core fields populated
- Practice footprint15% of score
1 documented practice location
- Medicare service volume (vs. specialty peers)25% of score
1,216 Medicare services, 2024 (ranked within specialty)
- Open Payments transparency10% of score
Has Open Payments disclosures (2024)
Medicare volume is ranked against active providers in the same specialty. Signals a provider has no public data for (e.g. Medicare claims) are left out of the score entirely — never counted as zero — so providers without that data are not penalized. See the full formula and weights in our .
What this provider does (Medicare)
Based on Medicare fee-for-service claims, 2024; not all care is captured.
| Service (HCPCS) | Medicare services | Typical Medicare-allowed (2024) |
|---|---|---|
| Subsequent Hospital Care With Moderate Levelof Medical Decision Making, If Using Time, at Least 35 Minutes99232 | 579 | $70 |
| Dialysis Services, 4 Or More Physician Visits Per Month (20 Years Or Older)90960 | 258 | $309 |
| Established Patient Office Or Other Outpatient Visit With Moderate Level of Decision Making, If Using Time, 30 Minutes Or More99214 | 128 | $116 |
| Established Patient Office Or Other Outpatient Visit With Low Level OD Decision Making, If Using Time, 20 Minutes Or More99213 | 99 | $83 |
| Dialysis Services, 2-3 Physician Visits Per Month (20 Years Or Older)90961 | 57 | $257 |
| Initial Hospital Care With Straightforward Or Low-Level Medical Decision Making, If Using Time, at Least 55 Minutes99222 |
What this provider prescribes (Medicare Part D)
Top drugs by Medicare Part D claim volume, 2024 · 27 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Parenteral Amino Acid 20% No.1brand: Prosol | 104 | — |
| Furosemide | 59 | 18 |
| Amlodipine Besylate | 57 | 20 |
| Calcitriol | 57 | 17 |
| Losartan Potassium | 54 | 18 |
| Hydralazine Hcl | 50 | 16 |
| Nifedipinebrand: Nifedipine Er | 47 | 18 |
Transparency — industry payments
Based on CMS Open Payments, 2024; not all care is captured.
$664 across 27 records (Open Payments 2024)
Open Payments discloses payments and transfers of value (meals, travel, consulting, research, royalties) from drug and device makers to providers. This is a transparency signal, not a verdict — such payments are legal and common, and their presence is neither an endorsement nor a criticism. Source: CMS Open Payments, program year 2024.
Practice location
Mailing address
Registry dates
- Enumerated
- 2006-05-31
- Last updated
- 2010-08-18
Frequently asked questions
- What is Stephen Chalmers's NPI number?
- Stephen Chalmers's National Provider Identifier (NPI) is 1134166143, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Stephen Chalmers's specialty?
- Stephen Chalmers is listed in the NPPES registry with a primary specialty of Nephrology Physician (Allopathic & Osteopathic Physicians).
- Where is Stephen Chalmers located?
- Stephen Chalmers's practice location on file with NPPES is 1132 S. Bowen Rd., Arlington, TX 76013.
- What is Stephen Chalmers's phone number?
- The practice phone number listed in the NPPES registry for Stephen Chalmers is (817) 265-9700.
- Does Stephen Chalmers accept Medicare?
- Stephen Chalmers is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Stephen Chalmers's NPI active?
- Yes — Stephen Chalmers's NPI (1134166143) is active in the NPPES registry as of the last update on 2010-08-18.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.