2026 NPPES data Gastroenterology Physician NPI 1285659383 MD
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Kenneth Fields, MD

Gastroenterology Physician in Memphis, Tennessee. This profile is drawn from the federal National Provider Identifier Registry (CMS NPPES), which lists more than 7 million U.S. healthcare providers - including 16,567 in Gastroenterology Physician, and covers specialty classification, practice address, and Medicare Part D prescribing data when reported. According to CMS, every field reflects the provider's official federal registration, see our methodology.

Federal data, no proprietary rating. We show these CMS records as-is - no composite score, no star rating, no editorial opinion layered on top.
Prescribing volume
2K
Medicare Part D claims · 470 beneficiaries · Gastroenterology Physician avg: 833
Generic prescribing
76%
generic claims · 24% brand-name · higher generic rates reduce patient out-of-pocket costs
MIPS score
91.9/100
▲ 9 pts above national avg 83.1 · Exceptional
Industry payments
$2.7K
126 payments · CMS Open Payments (Sunshine Act)
Compiled from official public sources by the PlainDoctor editorial team.

What the federal data shows

Kenneth Fields, MD reported a CMS MIPS final score of 91.9/100 - above the 83.1 national average - and filed 2,042 Medicare Part D claims in 2023.

91.9/100
MIPS score · +9 vs avg
2K
Part D claims, 2023
76%
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.

Kenneth Fields, MD's MIPS score vs every scored U.S. clinician

CMS Merit-based Incentive Payment System (MIPS) final score, 2023, the federal quality measure

92 Top 37% higher than 63% of 477,587 scored providers

0–10: 8,684 scored providers (2%). Below this entry. 10–20: 3,008 scored providers (1%). Below this entry. 20–30: 3,069 scored providers (1%). Below this entry. 30–40: 2,746 scored providers (1%). Below this entry. 40–50: 2,928 scored providers (1%). Below this entry. 50–60: 5,882 scored providers (1%). Below this entry. 60–70: 13,906 scored providers (3%). Below this entry. 70–80: 118,074 scored providers (25%). Below this entry. 80–90: 129,887 scored providers (27%). Below this entry. 90+: 189,403 scored providers (40%). This entry sits in this band. This provider 0 100 every MIPS-scored clinician, bucketed by value

Each bar is a band; taller bars hold more scored providers. 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 Merit-based Incentive Payment System (MIPS) · 2023

Where Kenneth Fields, MD sits

This provider among gastroenterology physician peers

Across the 5,957 gastroenterology physician providers who report both Medicare Part D prescribing and a MIPS quality score, Kenneth Fields, MD writes more Part D claims than 91% of them and scores higher on MIPS quality than 71% - placing this provider in the high-volume, high-quality quadrant. Volume reflects patient-panel size and specialty, not quality; the two axes are independent.

Part D claim volume vs MIPS quality, by specialty percentile

Lower volume · High qualityHigh volume · High qualityLower volume · Lower qualityHigh volume · Lower quality02550751000255075100Part D claim volume, percentile in specialtyMIPS quality, percentilePart D claim volume, percentile in specialty: 65 · MIPS quality, percentile: 83Part D claim volume, percentile in specialty: 50 · MIPS quality, percentile: 68Part D claim volume, percentile in specialty: 55 · MIPS quality, percentile: 8Part D claim volume, percentile in specialty: 72 · MIPS quality, percentile: 87Part D claim volume, percentile in specialty: 5 · MIPS quality, percentile: 38Part D claim volume, percentile in specialty: 58 · MIPS quality, percentile: 77Part D claim volume, percentile in specialty: 63 · MIPS quality, percentile: 30Part D claim volume, percentile in specialty: 52 · MIPS quality, percentile: 45Part D claim volume, percentile in specialty: 43 · MIPS quality, percentile: 7Part D claim volume, percentile in specialty: 18 · MIPS quality, percentile: 47Part D claim volume, percentile in specialty: 27 · MIPS quality, percentile: 58Part D claim volume, percentile in specialty: 30 · MIPS quality, percentile: 3Part D claim volume, percentile in specialty: 78 · MIPS quality, percentile: 20Part D claim volume, percentile in specialty: 38 · MIPS quality, percentile: 10Part D claim volume, percentile in specialty: 18 · MIPS quality, percentile: 97Part D claim volume, percentile in specialty: 42 · MIPS quality, percentile: 27Part D claim volume, percentile in specialty: 88 · MIPS quality, percentile: 57Part D claim volume, percentile in specialty: 35 · MIPS quality, percentile: 15Part D claim volume, percentile in specialty: 90 · MIPS quality, percentile: 97Part D claim volume, percentile in specialty: 13 · MIPS quality, percentile: 48Part D claim volume, percentile in specialty: 22 · MIPS quality, percentile: 78Part D claim volume, percentile in specialty: 2 · MIPS quality, percentile: 80Part D claim volume, percentile in specialty: 7 · MIPS quality, percentile: 22Part D claim volume, percentile in specialty: 23 · MIPS quality, percentile: 23Part D claim volume, percentile in specialty: 8 · MIPS quality, percentile: 43Part D claim volume, percentile in specialty: 32 · MIPS quality, percentile: 65Part D claim volume, percentile in specialty: 15 · MIPS quality, percentile: 42Part D claim volume, percentile in specialty: 70 · MIPS quality, percentile: 25Part D claim volume, percentile in specialty: 67 · MIPS quality, percentile: 82Part D claim volume, percentile in specialty: 3 · MIPS quality, percentile: 50Part D claim volume, percentile in specialty: 75 · MIPS quality, percentile: 30Part D claim volume, percentile in specialty: 28 · MIPS quality, percentile: 92Part D claim volume, percentile in specialty: 85 · MIPS quality, percentile: 60Part D claim volume, percentile in specialty: 48 · MIPS quality, percentile: 13Part D claim volume, percentile in specialty: 62 · MIPS quality, percentile: 10Part D claim volume, percentile in specialty: 80 · MIPS quality, percentile: 62Part D claim volume, percentile in specialty: 33 · MIPS quality, percentile: 52Part D claim volume, percentile in specialty: 77 · MIPS quality, percentile: 28Part D claim volume, percentile in specialty: 12 · MIPS quality, percentile: 85Part D claim volume, percentile in specialty: 17 · MIPS quality, percentile: 40Part D claim volume, percentile in specialty: 0 · MIPS quality, percentile: 37Part D claim volume, percentile in specialty: 47 · MIPS quality, percentile: 3Part D claim volume, percentile in specialty: 100 · MIPS quality, percentile: 17Part D claim volume, percentile in specialty: 60 · MIPS quality, percentile: 67Part D claim volume, percentile in specialty: 92 · MIPS quality, percentile: 92Part D claim volume, percentile in specialty: 73 · MIPS quality, percentile: 30Part D claim volume, percentile in specialty: 45 · MIPS quality, percentile: 73Part D claim volume, percentile in specialty: 25 · MIPS quality, percentile: 2Part D claim volume, percentile in specialty: 53 · MIPS quality, percentile: 18Part D claim volume, percentile in specialty: 68 · MIPS quality, percentile: 88Part D claim volume, percentile in specialty: 82 · MIPS quality, percentile: 97Part D claim volume, percentile in specialty: 40 · MIPS quality, percentile: 68Part D claim volume, percentile in specialty: 10 · MIPS quality, percentile: 63Part D claim volume, percentile in specialty: 87 · MIPS quality, percentile: 88Part D claim volume, percentile in specialty: 57 · MIPS quality, percentile: 30Part D claim volume, percentile in specialty: 83 · MIPS quality, percentile: 52Part D claim volume, percentile in specialty: 98 · MIPS quality, percentile: 95Part D claim volume, percentile in specialty: 37 · MIPS quality, percentile: 68Part D claim volume, percentile in specialty: 95 · MIPS quality, percentile: 52Part D claim volume, percentile in specialty: 97 · MIPS quality, percentile: 0Kenneth Fields, MD-Part D claim volume, percentile in specialty: 91 · MIPS quality, percentile: 71
Part D claim volume vs MIPS quality, by specialty percentile

Each dot is one gastroenterology physician peer from a representative sample of 60; the gold marker is Kenneth Fields, MD. Source: CMS Medicare Part D Prescriber data and the CMS Merit-based Incentive Payment System, 2023.

Board certification likely (heuristic, not verified)

Kenneth Fields, MD practices in an ABMS-board-eligible specialty and shows active CMS Medicare participation + MIPS quality reporting + 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 Kenneth Fields, MD?

High performer (top quartile)

NPI registry status

Active

Issued 07/12/2006

NPI 1285659383

Primary specialty

Gastroenterology Physician

Mid-sized

16,567 US NPIs in this specialty

Medicare Part D claims

2,042 145% vs specialty avg

2023 prescription claims

Specialty avg: 833

MIPS final score

91.9/100 8.8 pts vs avg

Exceptional band

vs 83.1 national avg

Specialty distribution in Tennessee

How Gastroenterology Physician compares to other specialties among Tennessee providers

Tennessee providers

Largest specialties in Tennessee (% of in-state providers)

Family Nurse Practitioner - 6.4%Family Nurse Practitioner6.4%Pharmacist - 5.9%Pharmacist5.9%Student in an Organized Health Care Education/Training Program - 4.6%Student in an Organized Health Care Education/Training Program4.6%Physical Therapist - 4.2%Physical Therapist4.2%Behavior Technician - 4.2%Behavior Technician4.2%Registered Nurse - 3.9%Registered Nurse3.9%Gastroenterology Physician - 0.3%Gastroenterology Physician0.3%
Largest specialties in Tennessee (% of in-state providers)

Medicare quality performance, MIPS

Kenneth Fields, MD's 2023 MIPS final score plotted against the Gastroenterology Physician national average

High performer (top quartile)
MIPS Final Score
91.9/100
vs 83.1 national avg · 2023 performance year

MIPS final score (Gastroenterology Physician) - 91.9/100 vs national avg 83.1

0%100%National avg83%91.9%
MIPS final score (Gastroenterology Physician) - 91.9/100 vs national avg 83.1

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).

Kenneth Fields, MD appears in the CMS NPPES registry as a Gastroenterology Physician provider holding MD credentials at 80 HUMPHREYS CENTER, Memphis, TN, 38120, with a listed phone of (901) 578-2538. NPI 1285659383 was issued on 07/12/2006. Because NPPES data is self-reported by the provider and refreshed monthly, the address, phone, and specialty reflect what Fields 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 2,042 prescription claims written by this provider, covering 470 Medicare beneficiaries and totaling roughly $1.1 million in drug spend, split 24% brand-name and 76% generic by claim count. 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. On the CMS Merit-based Incentive Payment System, this provider earned a Final Score of 91.9/100 for the 2023 performance year (Quality 98.3, Cost 69), compared with the national average of 83.1.

Gastroenterology Physician is a mid-sized specialty nationwide, with 16,567 enrolled providers across 54 states and an average of 833 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

80 HUMPHREYS CENTER
Memphis, TN 38120

Provider Details

NPI 1285659383
Specialty Gastroenterology Physician
Credentials MD
Gender Male
NPI Issued 07/12/2006

CMS Quality Score (MIPS)

Merit-based Incentive Payment System (MIPS) scores from CMS, 2023 performance year.

91.9008
Final Score
Avg: 83.1
98.3345
Quality
69.029
Cost
96
Promoting Interoperability

Reporting: Group practice

Hospital and facility affiliations

Facilities where Kenneth Fields, MD 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.

Baptist Memorial Medical Group, Inc.
Germantown, TN
Gastrointestinal Specialists Foundation, Inc.
Collierville, 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).

Industry payments received (2024) - CMS Open Payments transparency data

The federal Physician Payments Sunshine Act (part of the Affordable Care Act) requires drug and medical-device manufacturers + group purchasing organizations to publicly report payments and other transfers of value to physicians and teaching hospitals. The data below covers 2024 for Kenneth Fields, MD. Source: openpaymentsdata.cms.gov.

Total received

$2.7K

Largest payer

ABBVIE INC.

Most common payment type

Food and Beverage

Industry payments are not necessarily indicators of bias, they include research funding, consulting fees for evidence-based work, royalties for inventions, food at conferences, and similar items. The disclosure exists for transparency. Read our methodology for how we interpret this data.

Brand vs generic prescribing mix · Typical

Kenneth Fields, MD - brand share 24.0%
Gastroenterology Physician average

24% brand-name claims vs 76% generic, on 2,042 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.

2,042
Total Claims
$1.1M
Total Drug Cost
470
Medicare Beneficiaries

Prescribing Breakdown

30-Day Fills
2,965
Total Day Supply
82,306
Brand vs Generic
24% brand / 76% generic
Brand Drug Cost
$1.1M
Generic Drug Cost
$81K
Antibiotic Claims
55

Patient Demographics

Average Patient Age
67.9 years
Avg HCC Risk Score
1.54
Gender Split
72% female / 28% male
Age Distribution
<65: 126, 65-74: 220, 75-84: 105, 85+: 19

Top Prescribed Drugs (Medicare Part D)

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

What Kenneth Fields, MD 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
Pantoprazole Sodium
423
Linzess
Linaclotide
234
Dicyclomine Hcl
170
Colestipol Hcl
112
Omeprazole
107
Famotidine
84
Metoclopramide Hcl
75
Sucralfate
64
Mesalamine
53
Esomeprazole Magnesium
50

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

Gastroenterology Physician Overview

How Kenneth Fields, MD fits within the Gastroenterology Physician landscape nationally.

16,567
Gastroenterology Physician Providers in US
54
States with Gastroenterology Physician
833
Avg Claims per Provider

Kenneth Fields, MD's 2,042 claims are above the specialty average of 833.

Nearby Gastroenterology Physician Providers in Tennessee

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

Compare Gastroenterology 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 Gastroenterology 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 Kenneth Fields, MD's specialty?
Kenneth Fields, MD specializes in Gastroenterology Physician and practices in Memphis, Tennessee. Credentials: MD.
How much does Kenneth Fields, MD prescribe under Medicare Part D?
In 2023, Kenneth Fields, MD wrote 2,042 Medicare Part D claims totaling $1.1M in drug costs for 470 beneficiaries.
What is Kenneth Fields, MD's Medicare quality score?
Kenneth Fields, MD has a CMS MIPS Final Score of 91.9/100 (Quality: 98.3, Cost: 69). The national average MIPS Final Score is 83.1. Source: CMS Merit-based Incentive Payment System (MIPS) 2023.
Where is Kenneth Fields, MD located?
Kenneth Fields, MD is located at 80 HUMPHREYS CENTER, Memphis, TN, 38120. Phone: (901) 578-2538.
What is Kenneth Fields, MD's NPI number?
Kenneth Fields, MD's National Provider Identifier (NPI) is 1285659383, issued on 07/12/2006.
Does Kenneth Fields, MD prescribe more brand-name or generic drugs?
Kenneth Fields, MD's prescribing is 24% brand-name and 76% generic drugs by claim count, with $1.1M in brand drug costs.
How many Gastroenterology Physician providers are there in the US?
There are 16,567 Gastroenterology Physician providers across 54 states in the US. The average Gastroenterology Physician provider writes 833 Medicare Part D claims per year.
What drugs does Kenneth Fields, MD prescribe most often?
Based on 2023 Medicare Part D data, Kenneth Fields, MD's most frequently prescribed drugs include Pantoprazole Sodium, Linzess, Dicyclomine Hcl. This reflects Medicare Part D prescriptions only and does not include commercial insurance or other payer types.
Does Kenneth Fields, MD accept Medicare?
Kenneth Fields, MD appears in CMS Medicare data with 2,042 Part D claims and 470 Medicare beneficiaries in 2023. Contact the provider's office directly to confirm current Medicare enrollment and accepted plans.
How can I verify Kenneth Fields, MD's credentials?
Kenneth Fields, MD's NPI is 1285659383 with credentials MD. 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.
Quality Performance
CMS Merit-based Incentive Payment System (MIPS) - 2023 performance year.
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

Compiled from official public sources by the PlainDoctor editorial team.