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Dr. Stewart Lee Niefield, MD
NPI1255336871
- Medicare services, 2024
- 361
- Medicare patients, 2024
- 116
- Part D claims, 2024
- 2,667
- Publications
- 2
- Industry payments
- $10,180
- Practice address
- 6565 Fannin St, Houston, TX 77030
- Practice phone
- Call (713) 790-3311
- Professional email
- Get professional email
- Personal email
- Get personal email
- Mobile number
- Get mobile number
Primary practice
Houston Methodist Hospital
Houston, Texas
Find Dr. Niefield's professional email, personal email and mobile number
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Dr. Stewart Lee Niefield is an internist in Houston, Texas
Dr. Niefield practices at Houston Methodist Hospital in Houston, Texas.
Dr. Niefield's NPI, 1255336871, was assigned on June 20, 2005. Dr. Niefield graduated from Baylor College Of Medicine in 1980. Dr. Niefield holds Texas license F8258.
NPI and contact details
- NPI
- 1255336871NPI Registry (opens in a new tab)
- NPI enumeration date
- June 20, 2005
- NPI status
- Active
- Practice phone
- (713) 790-3311
- Professional email
- Get email
- Personal email
- Get email
- Mobile number
- Get number
- Sex
- Male
- Estimated age
- 72
- Medical school graduation
- 1980
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; and Dmand AI Practice Data
Dr. Stewart Lee Niefield practices at Houston Methodist Hospital in Houston, Texas
Dr. Niefield's primary practice is Houston Methodist Hospital, at 6565 Fannin St, Houston, TX 77030 in Harris County. The practice phone is (713) 790-3311.
- Houston Methodist Hospital6565 Fannin St, Houston, TX 77030 · Harris CountyPhone(713) 790-3311
Sources: NPPES NPI Registry (CMS); and Dmand AI Practice Data
Dr. Stewart Lee Niefield is affiliated with 2 sites of care and 1 medical group
Dr. Niefield's primary practice is Houston Methodist Hospital in Houston, Texas. The medical group on file is Village Medical. Dmand AI also links Dr. Niefield to 1 more group practice or clinic, named with a free account.
Sources: NPPES NPI Registry (CMS); Dmand AI Practice Data; and Dmand AI Affiliation Data
Dmand AI tracks the EHR system at Dr. Stewart Lee Niefield's practice
Dmand AI tracks the electronic health record (EHR) system at each site where Dr. Niefield practices. Vendor and product names are available with a free account.
| Site | EHR vendor and product |
|---|---|
| Houston Methodist Hospital | Available with a free account |
| +1 more affiliated site | Available with a free account |
Source: Dmand AI Technology Install Data
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Dr. Stewart Lee Niefield is one of 8,437 internists in Texas
Internal medicine is Dr. Niefield's primary specialty in the NPI Registry, under taxonomy code 207R00000X. Dr. Niefield is board certified in internal medicine by the American Board of Internal Medicine. Dr. Niefield is licensed in Texas.
Specialties and state licenses
- Internal medicine, TexasPrimary
Clinical focus
Dmand AI lists acid reflux, acute gastroduodenitis, acute kidney failure, acute sinusitis, acute skin infection, ADHD, aneurysm and anxiety among the conditions Dr. Niefield treats.
Internists near Dr. Niefield
Counts of internists with a Dmand AI profile, by place and practice. Each opens the list.
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; and Dmand AI Peer Benchmarks
Dr. Stewart Lee Niefield billed Medicare for 361 services in 2024
CMS data shows 361 Medicare services from Dr. Niefield across 13 procedure codes in 2024, for 116 Medicare patients. Medicare paid $10,158 for them. Every service was in an office.
Medicare services, 2024361
Medicare patients116
Paid by Medicare$10,158
Procedure codes13
Dr. Niefield's Medicare services by type, 2023 to 2024
- 2023
- 2024
- Lab and pathology
- 2023: 1,4832024: 19987%
- Office and hospital visits
- 2023: 5432024: 7886%
- Other services
- 2023: 5162024: 7186%
- Surgery
- 2023: 602024: 1378%
- Imaging
- 2023: 302024: 0100%
- Tests and treatments
- 2023: 1322024: 0100%
Dr. Niefield compared with the Texas median for internists, 2024
- Dr. Niefield
- Texas median
- Medicare services
- 361vs 53933% below
- Medicare patients
- 116vs 19039% below
- Part D claims
- 2,121vs 2897.3 times
Medians across 7,794 internists in Texas with Dmand AI profiles that report each measure.
Dr. Niefield's most billed Medicare procedure codes, 2024
CMS publishes codes billed for 11 or more Medicare patients. Each label is the code family; CPT descriptions are licensed by the AMA.
Need commercial claims for Dr. Niefield?
Medicare shows one payer. Book a meeting to get commercial claims data for Dr. Niefield and other internists in Texas.
Sources: Medicare Physician & Other Practitioners - by Provider and Service (CMS), 2024 data; and Dmand AI Peer Benchmarks
Dr. Stewart Lee Niefield treated 116 Medicare patients in 2024, average age 76
CMS counts 116 Medicare patients who saw Dr. Niefield in 2024. The largest group is 65 to 74, with 60 patients. 73% of them have high cholesterol, and 69% have high blood pressure. Their average risk score is 0.96, where 1.00 is the Medicare average.
Across all payers, Dmand AI patient panel data puts Dr. Niefield's median patient age at 64, with 38% women.
Medicare patients, 2024116
Average age76
Average risk score0.96
Dr. Niefield's Medicare patients by age, 2024
CMS leaves out age groups with fewer than 11 patients.
Dr. Niefield's Medicare patients by sex, 2024
- Women6354%
- Men5346%
Chronic conditions among Dr. Niefield's Medicare patients, 2024
- High cholesterol73%
- High blood pressure69%
- Arthritis41%
- Anxiety28%
- Ischemic heart disease23%
- Atrial fibrillation18%
- Cancer18%
- Diabetes17%
Share of Medicare patients with each condition. A patient can have several.
Dr. Niefield's patients across all payers
Dmand AI patient panel data covers Medicare, Medicaid and commercial patients.
Patient panel by age, all payers
Median age 64
Patient panel by sex, all payers
- Women38%
- Men60%
Sources: Dmand AI Patient Panel Data; and Medicare Physician & Other Practitioners - by Provider (CMS), 2024 data
Dr. Stewart Lee Niefield wrote 2,667 Medicare Part D claims in 2024
In 2024, Dr. Niefield wrote 2,667 Medicare Part D claims for 489 patients. 87% of them were for generic drugs. CMS names the drug for 2,121 of them, across 57 drugs with 11 or more claims each, at $174,419 in total drug cost. In 2023, CMS named 5,326 claims across 100 drugs.
Part D claims, 20242,667
Drugs named by CMS57
Total drug cost$174,419
Part D patients489
Dr. Niefield's Part D claims by kind of drug, 2024
- Generic2,313 claims87%
- Brand-name309 claims12%
- Other45 claims2%
Dr. Niefield's most prescribed drugs by claims, 2024
CMS names a drug when it has 11 or more claims. Share is of the claims for drugs CMS names.
Drug classes CMS tracks in Dr. Niefield's Part D claims, 2024
- Opioids1%17 of 2,667 claims
- Antibiotics1%38 of 2,667 claims
Share of all Part D claims for each drug class CMS reports on. Classes with no claims are left out.
Part D claims for drugs CMS names, 2023 to 2024
- 2023
- 2024
- Claims for drugs CMS names
- 2023: 5,3262024: 2,12160%
Drugs named by CMS: 57 in 2024, 100 in 2023.
Sources: Medicare Part D Prescribers - by Provider and Drug (CMS), 2024 data, released May 6, 2026; and Medicare Part D Prescribers - by Provider (CMS), 2024 data
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Dr. Stewart Lee Niefield has 2 publications on record
Dmand AI links 2 papers to Dr. Niefield. Dr. Niefield's most frequent co-author is Stephen Greenberg, MD.
Papers2
Dr. Niefield's most frequent co-authors
Recent publications by Dr. Niefield
Antimicrob Agents Chemother
CefamandoleCefonicidCephalosporins
See who Dr. Niefield researches with
Physician Network Discovery turns co-authorship, shared hospitals and shared groups into a map of who Dr. Niefield works with, so you can find a warm path to the right internists.
Sources: PubMed (National Library of Medicine); and Dmand AI Research Linkage
Dr. Stewart Lee Niefield received $10,180 in industry payments from 2016 to 2025
CMS Open Payments shows 654 general payments to Dr. Niefield from 55 drug and device companies from 2016 to 2025. Food and beverage make up the largest share, 100% of the total. Novo Nordisk Inc paid the most, $1,481.
General payments to Dr. Niefield by program year, 2016 to 2025
General payments to Dr. Niefield by kind, 2016 to 2025
$10.2Kin total
- Food and beverage$10,171100%
- Education$90%
Companies that paid Dr. Niefield the most, 2016 to 2025
Share is of all general payments to this clinician.
Source: Open Payments (CMS), 2025 data, released July 7, 2026
Dr. Stewart Lee Niefield has 4 awards and honors on record
Dmand AI lists 4 awards for Dr. Niefield, most recently Top Doctors:SE Texas in 2013.
Awards and honors for Dr. Niefield
- 2013
- Top Doctors:SE Texas
- 2012
- CMS Stage 1 EHR
- Undated
- Checkbook Top Doc
- Super Doc
Source: Dmand AI Professional Profile Data
Dr. Stewart Lee Niefield graduated from Baylor College Of Medicine
Dr. Niefield graduated from Baylor College Of Medicine in 1980.
- Medical school
- Board certified in internal medicine
Source: Dmand AI Professional Profile Data
Dr. Stewart Lee Niefield accepts plans from 12 insurance carriers
Dr. Niefield is in network with 12 carriers, including Aetna, United Healthcare and Cigna. HMO plans come from the most carriers, 8. Check the plan with the practice before a visit.
- Aetna
- United Healthcare
- Cigna
- Elevance
- Blue Cross Blue Shield of Michigan
- HCSC
- Alliant Health Plans
- Aspirus Health Plan
- +4 more carriersWith a free account
Plan types Dr. Niefield accepts, by number of carriers
- HMO8
- PPO8
- EPO4
- Medicare3
- POS2
Source: Dmand AI Insurance Network Data
Sources for Dr. Stewart Lee Niefield's profile data
| Data on this page | Source |
|---|---|
| NPI, name, sex, specialty and licenses | NPPES NPI Registry (CMS) (opens in a new tab)Dmand AI Professional Profile Data |
| Practice locations and phone | NPPES NPI Registry (CMS) (opens in a new tab)Dmand AI Practice Data |
| Primary practice, affiliations and health system | NPPES NPI Registry (CMS) (opens in a new tab)Dmand AI Practice DataDmand AI Affiliation Data |
| Medicare services and procedure codes | Medicare Physician & Other Practitioners - by Provider and Service (CMS) (opens in a new tab) |
| State medians for the same specialty | Dmand AI Peer Benchmarks |
| Medicare patients and the all-payer patient panel | Dmand AI Patient Panel DataMedicare Physician & Other Practitioners - by Provider (CMS) (opens in a new tab) |
| Part D prescribing | Medicare Part D Prescribers - by Provider and Drug (CMS) (opens in a new tab)Medicare Part D Prescribers - by Provider (CMS) (opens in a new tab) |
| Publications, topics and co-authors | PubMed (National Library of Medicine) (opens in a new tab)Dmand AI Research Linkage |
| Industry payments | Open Payments (CMS) (opens in a new tab) |
| Awards and committee roles | Dmand AI Professional Profile Data |
| Training, board certification and memberships | Dmand AI Professional Profile Data |
| Insurance carriers and plan types | Dmand AI Insurance Network Data |
| EHR at each practice site | Dmand AI Technology Install Data |
| Similar physicians | Dmand AI Affiliation Data |
Data last refreshed October 2026Report an inaccuracyRemove my information
FAQ
Frequently asked questions about Dr. Stewart Lee Niefield
Spotted something out of date? Email hello@dmand.ai and we will check the record. Contact details live in the free trial.
What is Dr. Stewart Lee Niefield's NPI number?
Dr. Stewart Lee Niefield's NPI number is 1255336871. It was assigned on June 20, 2005, and it is active in the NPI Registry.
What kind of doctor is Dr. Stewart Lee Niefield?
Dr. Stewart Lee Niefield is an internist in Houston, Texas. The primary specialty in the NPI Registry is Internal Medicine Physician (taxonomy code 207R00000X).
Where does Dr. Stewart Lee Niefield practice?
Dr. Niefield practices at 6565 Fannin St, Houston, TX 77030. Dr. Niefield's primary practice is Houston Methodist Hospital in Houston, Texas. Dmand AI also links Dr. Niefield to 1 group practice or clinic.
What is Dr. Stewart Lee Niefield's office phone number?
The practice phone on file for Dr. Niefield is (713) 790-3311.
What is Dr. Stewart Lee Niefield's medical license number?
Dr. Niefield holds Texas license F8258.
What medical group is Dr. Stewart Lee Niefield part of?
Dr. Niefield is linked to Village Medical.
Does Dr. Stewart Lee Niefield accept Medicare?
Yes. CMS data shows Dr. Niefield billed Medicare for 361 services in 2024.
How many Medicare patients does Dr. Stewart Lee Niefield see?
CMS counts 116 Medicare patients who saw Dr. Niefield in 2024, with an average age of 76.
Is Dr. Stewart Lee Niefield board certified?
Yes. Dr. Niefield is board certified in internal medicine by the American Board of Internal Medicine.
What services does Dr. Stewart Lee Niefield bill to Medicare?
In 2024, Dr. Niefield's most billed Medicare services were lab and pathology test (80053), lab and pathology test (85025) and lab and pathology test (80061).
Show 7 more questionsShow fewer questions
Where did Dr. Stewart Lee Niefield go to medical school?
Dr. Niefield graduated from Baylor College Of Medicine in 1980.
What drugs does Dr. Stewart Lee Niefield prescribe most?
In 2024 Medicare Part D data, Dr. Niefield's most prescribed drugs by claims were Atorvastatin Calcium, Losartan Potassium and Levothyroxine Sodium.
Has Dr. Stewart Lee Niefield received payments from drug or device companies?
CMS Open Payments shows $10,180 in general payments to Dr. Niefield from 55 companies from 2016 to 2025. The largest total came from Novo Nordisk Inc.
How long has Dr. Stewart Lee Niefield been practicing?
Dr. Niefield graduated from medical school in 1980, 46 years ago.
Does Dr. Stewart Lee Niefield do research?
Dmand AI links 2 publications to Dr. Niefield.
Who does Dr. Stewart Lee Niefield publish with?
Dr. Niefield's most frequent co-authors are Stephen Greenberg, MD (1 shared paper).
What insurance does Dr. Stewart Lee Niefield accept?
Dr. Niefield is in network with 12 carriers, including Aetna, United Healthcare and Cigna. HMO plans come from the most carriers, 8. Check the plan with the practice before a visit.
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