2026 NPPES data Internal Medicine Physician NPI 1891997961 M.D.
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James Stanfield, M.D.

Internal Medicine Physician in Chattanooga, Tennessee. CMS National Plan and Provider Enumeration System profile including specialty classification, practice address, and Medicare prescribing data when reported.

Federal data — no proprietary rating. PlainDoctor publishes the actual CMS NPPES and Medicare records — NPI registration, specialty, practice location, and prescribing data — without a composite score or editorial opinion on top. Every field traces to a federal source.
Prescribing volume
422
Medicare Part D claims · 172 beneficiaries · Internal Medicine Physician avg: 3K
Generic prescribing
92%
generic claims · 8% brand-name · higher generic rates reduce patient out-of-pocket costs

What the federal data shows

James Stanfield, M.D. filed 422 Medicare Part D claims in 2023 as a Internal Medicine Physician in Chattanooga, Tennessee, prescribing 92% generic.

422
Part D claims, 2023
92%
generic prescribing
Likely
board-certified (heuristic)

Every figure on this page comes straight from federal CMS records (NPPES, Medicare Part D, MIPS, Open Payments) — no proprietary rating or editorial opinion is applied.

James Stanfield, M.D.'s Medicare Part D volume vs every U.S. prescriber

Total Medicare Part D claims, 2023 — across all CMS prescribers nationally

422 Top 38% higher than 62% of 1,370,886 prescribers

0–200: 670,926 prescribers (49%). Below this entry. 200–400: 182,923 prescribers (13%). Below this entry. 400–600: 90,619 prescribers (7%). This entry sits in this band. 600–800: 56,224 prescribers (4%). Above this entry. 800–1,000: 40,919 prescribers (3%). Above this entry. 1,000–1,200: 31,827 prescribers (2%). Above this entry. 1,200–1,400: 26,224 prescribers (2%). Above this entry. 1,400–1,600: 21,710 prescribers (2%). Above this entry. 1,600–1,800: 19,072 prescribers (1%). Above this entry. 1,800–2,000: 16,451 prescribers (1%). Above this entry. 2,000–2,200: 213,991 prescribers (16%). Above this entry. This provider 0 2K+ every Part D prescriber (claims/yr), bucketed by value

Each bar is a band; taller bars hold more prescribers. The dashed line + filled bar mark this entry. Hover or tap any bar for its full count, share, and where it sits relative to this entry.

Source CMS Medicare Part D Prescriber Public Use File · 2023

Board certification likely (heuristic — not verified)

James Stanfield, M.D. practices in an ABMS-board-eligible specialty and shows active CMS Medicare participation + 2 hospital affiliations — signals consistent with board-certified status. For verified board certification, see CertificationMatters.org (the official ABMS public lookup).

What does the federal data show about James Stanfield, M.D.?

Quality data not reported

NPI registry status

Active

Issued 06/01/2007

NPI 1891997961

Primary specialty

Internal Medicine Physician

High-volume

172,858 US NPIs in this specialty

Medicare Part D claims

422 84% vs specialty avg

2023 prescription claims

Specialty avg: 2,716

Specialty distribution in Tennessee

How Internal Medicine Physician compares to other specialties among Tennessee providers

Tennessee providers

Internal Medicine Physician share within Tennessee

1. Internal Medicine Physician42%2. Internal medicine21%3. Family medicine17%4. Surgical12%5. Pediatric8%
Internal Medicine Physician share within Tennessee

Specialty board-certification context

Estimated specialty board-certified rate — Internal Medicine Physician (ABMS / AOA reference)

Quality data not reported
Est. board-certified rate
78%
Internal Medicine Physician ABMS/AOA estimate

Est. board-certified rate (Internal Medicine Physician) — ABMS / AOA estimate

0%100%78%
Est. board-certified rate (Internal Medicine Physician) — ABMS / AOA estimate

The Merit-based Incentive Payment System (MIPS) scores providers 0–100 across four performance categories: Quality, Cost, Promoting Interoperability, and Improvement Activities, weighted under 42 CFR §414.1380. Reporting is voluntary for many small practices, so absence of a MIPS score is not a quality signal.

Board certification through an ABMS or AOA member board signals voluntary post-licensure examination plus continuous Maintenance of Certification cycles. Verify any individual provider's status through certificationmatters.org (ABMS) or osteopathic.org (AOA).

James Stanfield, M.D. appears in the CMS NPPES registry as a Internal Medicine Physician provider holding M.D. credentials at 975 E 3RD ST, Chattanooga, TN, 37403, with a listed phone of (713) 554-5302. NPI 1891997961 was issued on 06/01/2007. Because NPPES data is self-reported by the provider and refreshed monthly, the address, phone, and specialty reflect what Stanfield most recently submitted to CMS rather than a vetted directory listing, which is why patients should always confirm the practice is still at this location before scheduling.

Medicare Part D records for calendar year 2023 show 422 prescription claims written by this provider, covering 172 Medicare beneficiaries and totaling roughly $19K in drug spend, split 8% brand-name and 92% generic by claim count, with an opioid prescribing rate of 5.5%. These figures capture only Medicare Part D — commercial insurance, Medicaid, and cash-pay prescriptions are not included, and any drug-beneficiary cell under 11 is suppressed by CMS for patient privacy.

Internal Medicine Physician is a high-volume specialty nationwide, with 172,858 enrolled providers across 56 states and an average of 2,716 Part D claims per prescriber, so the context for interpreting these metrics differs meaningfully from a primary-care baseline. Important: PlainDoctor is a directory of publicly available government data, not medical advice, a malpractice database, or a quality rating. Inclusion here does not imply a recommendation, and absence of complaints or sanctions on this page does not mean none exist — always verify credentials through the NPPES NPI Registry, your state medical board, and the ABMS or AOA before making healthcare decisions.

Practice Address

975 E 3RD ST
Chattanooga, TN 37403

Provider Details

NPI 1891997961
Specialty Internal Medicine Physician
Credentials M.D.
Gender Male
NPI Issued 06/01/2007

Hospital and facility affiliations

Facilities where James Stanfield, M.D. bills Medicare from. Star ratings (1-5) are CMS Hospital Compare's "Hospital overall rating" — a composite of mortality, readmission, patient experience, safety, timely care, and efficient use of medical imaging measures. Source: CMS Care Compare.

Statcare Inpatient LLC
Athens, TN
Vohra Post Acute Care Physicians OF The East PA
Adamsville, TN

Affiliations sourced from CMS Doctors and Clinicians National Downloadable File; hospital ratings from CMS Hospital General Information dataset (cross-referenced by facility name + state).

Brand vs generic prescribing mix · Generic-heavy

James Stanfield, M.D. — brand share 8.0%
Specialty average (est.)

8% brand-name claims vs 92% generic, on 422 2023 Medicare Part D claims.

The federal Medicare Part D Generic Dispensing Rate national benchmark sits near 90% generic / 10% brand for primary-care prescribers, per CMS Office of the Actuary 2024 estimates. Higher brand share is common in specialty prescribing where generic equivalents are not available.

Medicare Part D Prescribing Data

CMS Medicare Part D prescriber-level data for calendar year 2023.

422
Total Claims
$19K
Total Drug Cost
172
Medicare Beneficiaries

Prescribing Breakdown

30-Day Fills
422
Total Day Supply
7,073
Brand vs Generic
8% brand / 92% generic
Brand Drug Cost
$14K
Generic Drug Cost
$5K
Opioid Claims
23 (5.5% rate)
Antibiotic Claims
104

Patient Demographics

Average Patient Age
72.7 years
Avg HCC Risk Score
2.09
Gender Split
56% female / 44% male
Age Distribution
<65: 33, 65-74: 55, 75-84: 61, 85+: 23

Top Prescribed Drugs (Medicare Part D)

Top drugs by claim count for calendar year 2023. Based on Medicare Part D data only.

What James Stanfield, M.D. prescribes most

Top Medicare Part D drugs by claim count, 2023

claims
Source CMS Medicare Part D Prescriber Public Use File As of 2023
Drug Claims
Levofloxacin
24
Lisinopril
21
Doxycycline Hyclate
20
Prednisone
19
Potassium Chloride
16
Hydrochlorothiazide
13
Tamsulosin Hcl
13
Eliquis
Apixaban
12
Pantoprazole Sodium
12
Methylprednisolone
11

* Counts below 11 are suppressed by CMS for patient privacy. Generic names shown where available from CMS Part D data.

Internal Medicine Physician Overview

How James Stanfield, M.D. fits within the Internal Medicine Physician landscape nationally.

172,858
Internal Medicine Physician Providers in US
56
States with Internal Medicine Physician
2,716
Avg Claims per Provider

James Stanfield, M.D.'s 422 claims are below the specialty average of 2,716.

Nearby Internal Medicine Physician Providers in Tennessee

Other clinicians with the same primary specialty enrolled in Tennessee, drawn from the same CMS NPPES roster as Stanfield.

Compare Internal Medicine Physician nationally: see state-by-state distribution →

Before you book an appointment

Use this federal record as your verification checklist, not as a recommendation.

  • Confirm the NPI record is current in the official CMS registry — providers update their own NPPES details, and moves can lag. Verify this NPI
  • Check the active license and any disciplinary history with the Tennessee medical board — federal registration is not a license check. Credential verification guide
  • Weigh a second option: compare this provider with a nearby Internal Medicine Physician peer on Medicare volume and prescribing patterns. Compare providers

Medicare Part D and MIPS figures describe practice patterns in federal programs only — they are not quality ratings, and PlainDoctor does not rate, rank, or recommend providers.

Frequently Asked Questions

What is James Stanfield, M.D.'s specialty?
James Stanfield, M.D. specializes in Internal Medicine Physician and practices in Chattanooga, Tennessee. Credentials: M.D..
How much does James Stanfield, M.D. prescribe under Medicare Part D?
In 2023, James Stanfield, M.D. wrote 422 Medicare Part D claims totaling $19K in drug costs for 172 beneficiaries.
Where is James Stanfield, M.D. located?
James Stanfield, M.D. is located at 975 E 3RD ST, Chattanooga, TN, 37403. Phone: (713) 554-5302.
What is James Stanfield, M.D.'s NPI number?
James Stanfield, M.D.'s National Provider Identifier (NPI) is 1891997961, issued on 06/01/2007.
Does James Stanfield, M.D. prescribe more brand-name or generic drugs?
James Stanfield, M.D.'s prescribing is 8% brand-name and 92% generic drugs by claim count, with $14K in brand drug costs.
Does James Stanfield, M.D. prescribe opioids?
Yes, James Stanfield, M.D. had 23 opioid claims in 2023 with an opioid prescribing rate of 5.5%.
How many Internal Medicine Physician providers are there in the US?
There are 172,858 Internal Medicine Physician providers across 56 states in the US. The average Internal Medicine Physician provider writes 2,716 Medicare Part D claims per year.
What drugs does James Stanfield, M.D. prescribe most often?
Based on 2023 Medicare Part D data, James Stanfield, M.D.'s most frequently prescribed drugs include Levofloxacin, Lisinopril, Doxycycline Hyclate. This reflects Medicare Part D prescriptions only and does not include commercial insurance or other payer types.
Does James Stanfield, M.D. accept Medicare?
James Stanfield, M.D. appears in CMS Medicare data with 422 Part D claims and 172 Medicare beneficiaries in 2023. Contact the provider's office directly to confirm current Medicare enrollment and accepted plans.
How can I verify James Stanfield, M.D.'s credentials?
James Stanfield, M.D.'s NPI is 1891997961 with credentials M.D.. You can verify this through the NPPES NPI Registry, check state medical board records, and confirm board certification through the ABMS or AOA.

Data Sources

Provider Directory
CMS National Plan and Provider Enumeration System (NPPES), download.cms.gov/nppes, updated monthly. Contains NPI, specialty, credentials, and practice location.
Specialty Classification
NUCC Health Care Provider Taxonomy (nucc.org), the industry standard for classifying provider specialties in Medicare and Medicaid billing.
Prescribing Data
CMS Medicare Part D Prescriber Public Use File (2023). Includes claims, drug costs, beneficiaries, and opioid prescribing rates.
Limitations
Provider data is self-reported to CMS. Prescribing data reflects Medicare Part D only and does not include commercial insurance, Medicaid, or cash prescriptions. Claims below 11 beneficiaries are suppressed by CMS for privacy.

See our complete data methodology for details on how we collect and process government data.

Data as of April 2026 (NPPES) / 2023 (Medicare Part D). Source: Centers for Medicare & Medicaid Services (CMS).

Disclaimer: Data from CMS NPPES and Medicare Part D. PlainDoctor does not rate or rank providers. Provider information is self-reported and may not be current. Always verify information directly with the provider. About · Methodology