2026 NPPES data Critical Care Medicine (Internal Medicine) Physician NPI 1346336237 M.D.
Verify on CMS →

FIELDING JOHNSON, M.D.

Critical Care Medicine (Internal Medicine) Physician in EAST HARTFORD, Connecticut. 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
8K
Medicare Part D claims · 253 beneficiaries · Critical Care Medicine (Internal Medicine) Physician avg: 1K
Generic prescribing
76%
generic claims · 24% brand-name · higher generic rates reduce patient out-of-pocket costs
Industry payments
$5.1K
152 payments · CMS Open Payments (Sunshine Act)

What the federal data shows

FIELDING JOHNSON, M.D. filed 8,413 Medicare Part D claims in 2023 as a Critical Care Medicine (Internal Medicine) Physician in EAST HARTFORD, Connecticut, prescribing 76% generic.

8K
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.

FIELDING JOHNSON, M.D.'s Medicare Part D volume vs every U.S. prescriber

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

8,413 Top 3% higher than 97% 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%). Below this entry. 600–800: 56,224 prescribers (4%). Below this entry. 800–1,000: 40,919 prescribers (3%). Below this entry. 1,000–1,200: 31,827 prescribers (2%). Below this entry. 1,200–1,400: 26,224 prescribers (2%). Below this entry. 1,400–1,600: 21,710 prescribers (2%). Below this entry. 1,600–1,800: 19,072 prescribers (1%). Below this entry. 1,800–2,000: 16,451 prescribers (1%). Below this entry. 2,000–2,200: 213,991 prescribers (16%). This entry sits in this band. 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)

FIELDING JOHNSON, M.D. practices in an ABMS-board-eligible specialty and shows active CMS Medicare participation + 1 hospital affiliation — 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 FIELDING JOHNSON, M.D.?

Quality data not reported

NPI registry status

Active

Issued 10/05/2006

NPI 1346336237

Primary specialty

Critical Care Medicine (Internal Medicine) Physician

Mid-sized

6,631 US NPIs in this specialty

Medicare Part D claims

8,413 687% vs specialty avg

2023 prescription claims

Specialty avg: 1,069

Specialty distribution in Connecticut

How Critical Care Medicine (Internal Medicine) Physician compares to other specialties among Connecticut providers

Connecticut providers

Critical Care Medicine (Internal Medicine) Physician share within Connecticut

1. Critical Care Medicine (Internal Medicine) Physician42%2. Internal medicine21%3. Family medicine17%4. Surgical12%5. Pediatric8%
Critical Care Medicine (Internal Medicine) Physician share within Connecticut

Specialty board-certification context

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

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

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

0%100%78%
Est. board-certified rate (Critical Care Medicine (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).

FIELDING JOHNSON, M.D. is a Critical Care Medicine (Internal Medicine) Physician provider practicing in EAST HARTFORD, Connecticut, according to the CMS National Plan and Provider Enumeration System (NPPES). Credentials: M.D.. NPI: 1346336237. This profile includes practice location, specialty classification, and organizational affiliations from the CMS provider registry. Provider information is self-reported to CMS and updated monthly.

FIELDING JOHNSON, M.D. appears in the CMS NPPES registry as a Critical Care Medicine (Internal Medicine) Physician provider holding M.D. credentials at 893 MAIN ST STE 202, EAST HARTFORD, CT, 06108, with a listed phone of (860) 528-4124. NPI 1346336237 was issued on 10/05/2006. Because NPPES data is self-reported by the provider and refreshed monthly, the address, phone, and specialty reflect what JOHNSON 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 8,413 prescription claims written by this provider, covering 253 Medicare beneficiaries and totaling roughly $1.1 million in drug spend, split 24% brand-name and 76% generic by claim count, with an opioid prescribing rate of 4.4%. 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.

Critical Care Medicine (Internal Medicine) Physician is a mid-sized specialty nationwide, with 6,631 enrolled providers across 53 states and an average of 1,069 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

893 MAIN ST STE 202
EAST HARTFORD, CT 06108

Provider Details

NPI 1346336237
Specialty Critical Care Medicine (Internal Medicine) Physician
Credentials M.D.
Gender Male
NPI Issued 10/05/2006

Hospital and facility affiliations

Facilities where FIELDING JOHNSON, 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.

PRIME HEALTHCARE, PC
EAST HARTFORD, CT

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 FIELDING JOHNSON, M.D.. Source: openpaymentsdata.cms.gov.

Total received

$5.1K

Largest payer

GlaxoSmithKline, LLC.

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

FIELDING JOHNSON, M.D. — brand share 24.0%
Specialty average (est.)

24% brand-name claims vs 76% generic, on 8,413 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.

8,413
Total Claims
$1.1M
Total Drug Cost
253
Medicare Beneficiaries

Prescribing Breakdown

30-Day Fills
11,353
Total Day Supply
306,489
Brand vs Generic
24% brand / 76% generic
Brand Drug Cost
$944K
Generic Drug Cost
$191K
Opioid Claims
367 (4.4% rate)
Antibiotic Claims
128

Patient Demographics

Average Patient Age
69.8 years
Avg HCC Risk Score
2.17
Gender Split
55% female / 45% male
Age Distribution
<65: 58, 65-74: 114, 75-84: 65, 85+: 16

Top Prescribed Drugs (Medicare Part D)

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

Drug Claims
Atorvastatin Calcium
356
Amlodipine Besylate
236
Albuterol Sulfate Hfa
Albuterol Sulfate
224
Metformin Hcl
187
Divalproex Sodium
183
Montelukast Sodium
170
Jardiance
Empagliflozin
164
Metoprolol Succinate
157
Gabapentin
156
Eliquis
Apixaban
155

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

Critical Care Medicine (Internal Medicine) Physician Overview

How FIELDING JOHNSON, M.D. fits within the Critical Care Medicine (Internal Medicine) Physician landscape nationally.

6,631
Critical Care Medicine (Internal Medicine) Physician Providers in US
53
States with Critical Care Medicine (Internal Medicine) Physician
1,069
Avg Claims per Provider

FIELDING JOHNSON, M.D.'s 8,413 claims are above the specialty average of 1,069.

Nearby Critical Care Medicine (Internal Medicine) Physician Providers in Connecticut

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

Compare Critical Care Medicine (Internal Medicine) Physician nationally: see state-by-state distribution →

Frequently Asked Questions

What is FIELDING JOHNSON, M.D.'s specialty?
FIELDING JOHNSON, M.D. specializes in Critical Care Medicine (Internal Medicine) Physician and practices in EAST HARTFORD, Connecticut. Credentials: M.D..
How much does FIELDING JOHNSON, M.D. prescribe under Medicare Part D?
In 2023, FIELDING JOHNSON, M.D. wrote 8,413 Medicare Part D claims totaling $1.1M in drug costs for 253 beneficiaries.
Where is FIELDING JOHNSON, M.D. located?
FIELDING JOHNSON, M.D. is located at 893 MAIN ST STE 202, EAST HARTFORD, CT, 06108. Phone: (860) 528-4124.
What is FIELDING JOHNSON, M.D.'s NPI number?
FIELDING JOHNSON, M.D.'s National Provider Identifier (NPI) is 1346336237, issued on 10/05/2006.
Does FIELDING JOHNSON, M.D. prescribe more brand-name or generic drugs?
FIELDING JOHNSON, M.D.'s prescribing is 24% brand-name and 76% generic drugs by claim count, with $944K in brand drug costs.
Does FIELDING JOHNSON, M.D. prescribe opioids?
Yes, FIELDING JOHNSON, M.D. had 367 opioid claims in 2023 with an opioid prescribing rate of 4.4%.
How many Critical Care Medicine (Internal Medicine) Physician providers are there in the US?
There are 6,631 Critical Care Medicine (Internal Medicine) Physician providers across 53 states in the US. The average Critical Care Medicine (Internal Medicine) Physician provider writes 1,069 Medicare Part D claims per year.
What drugs does FIELDING JOHNSON, M.D. prescribe most often?
Based on 2023 Medicare Part D data, FIELDING JOHNSON, M.D.'s most frequently prescribed drugs include Atorvastatin Calcium, Amlodipine Besylate, Albuterol Sulfate Hfa. This reflects Medicare Part D prescriptions only and does not include commercial insurance or other payer types.
Does FIELDING JOHNSON, M.D. accept Medicare?
FIELDING JOHNSON, M.D. appears in CMS Medicare data with 8,413 Part D claims and 253 Medicare beneficiaries in 2023. Contact the provider's office directly to confirm current Medicare enrollment and accepted plans.
How can I verify FIELDING JOHNSON, M.D.'s credentials?
FIELDING JOHNSON, M.D.'s NPI is 1346336237 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