Warren Fields, M.D.
Internal Medicine Physician · Mystic, CT
Warren Fields, M.D. is an internal medicine physician with a practice address in Mystic, Connecticut, and NPI 1821083999, issued on Sep 15, 2005. Check the license (Connecticut 035098, as entered in NPPES) on the Connecticut Medical Examining Board; the Medicare figures below come from public CMS files.
- Name
- Warren Fields
- Credential
- M.D.
- Primary taxonomy
- Internal Medicine Physician 207R00000X
- License number
- 035098 CT
Self-reported in NPPES; status is on the state search - Practice location
- 200 Sandy Hollow RD, Mystic, CT 06355
- Phone
- (860) 572-8911
- Enumerated
- Sep 15, 2005
- Entity
- Type 1 · individual
Also registered at 200 Sandy Hollow RD
A shared address usually means a shared clinic or building; it does not show who employs whom.
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- James Scarles, M.D.Internal Medicine Physician1194710269
- James Sullivan, M.D.Internal Medicine Physician1780679472
Verify Warren Fields in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersConnecticut Medical Examining Board
Search for license 035098Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS, AOA, NCCPA, AANPNot checked
3.1 times the Medicare Part D claims of the average internal medicine physician in 2024
8,733 Medicare Part D claims for 772 beneficiaries, against an average of 2,785 among the 127,794 providers of this specialty who prescribed in Part D. Brand-name drugs were 11% of claims. 446 claims were for opioids.
Most prescribed
- Atorvastatin Calcium434 claims
- Losartan Potassium315 claims
- Alprazolam306 claims
- Pantoprazole Sodium275 claims
- Amlodipine Besylate227 claims
- Levothyroxine Sodium225 claims
Source: CMS Medicare Part D Prescribers by Provider and Drug, 2024 (data.cms.gov). Part D covers prescriptions for Medicare patients only; drugs with fewer than 11 claims are not published.
The Medicare quality score for 2023: 93.6 of 100
The Merit-based Incentive Payment System score is reported for this clinician. Four categories are weighted into the final score; the average among 454,083 clinicians with a measured score was 83.5.
Source: CMS Quality Payment Program, MIPS performance year 2023; category weights for 2023 (qpp.cms.gov).
Industry payments in 2024: $137.12
2 payments, mostly food and beverage; the largest payer was GlaxoSmithKline, LLC.. The 65,274 providers of this specialty with any payment received $2,536.66 on average. Payments are reported by manufacturers, not by the provider, and are not a sign of wrongdoing.
Source: CMS Open Payments, program year 2024 (openpaymentsdata.cms.gov); average among providers of this specialty with at least one payment.
2 hospital and facility affiliations
- Hartford Healthcare Medical Group IncSouthington, CT
- Hospital Medicine Associates LLCNew London, CT
Source: CMS Doctors and Clinicians affiliations; Hospital General Information (Care Compare) (data.cms.gov). Star ratings are CMS hospital ratings, not ratings of this provider.
9 internal medicine physician records list a Mystic practice address
They are 9 of the 242 NPPES records with a Mystic practice address, and 2,830 internal medicine physician records in Connecticut.
All 9 in Mystic → All 2,830 in Connecticut → Every provider in Mystic →
Other internal medicine physician records in Connecticut
- Christina AbavanaBridgeport, CT1508206574
- Hoda Abdel Salam, M.D.New Britain, CT1144509316
- Gada Abdelhafiz, MDNew London, CT1467649558
- Mahmoud Abdelrahman, MDBridgeport, CT1467072868
- Simon Abi-SalehBridgeport, CT1891315529
- Gerard Abidor, D.O.Bridgeport, CT1518014539
- Richard Abraham, M.D.Canton, CT1023044252
- Odaliz Abreu-Lanfranco, MDNew Haven, CT1538276134
- Nila Aburto, MDStamford, CT1396325718
- Angelo Accomando, M.D.East Haven, CT1063454247
Common questions
What is Warren Fields, M.D.'s NPI number?
Warren Fields, M.D.'s National Provider Identifier (NPI) is 1821083999, issued on Sep 15, 2005. An NPI identifies a provider in billing; it is not a license.
Where is Warren Fields, M.D. located?
The NPPES record lists a practice address at 200 Sandy Hollow RD, Mystic, CT, 06355. Phone: (860) 572-8911. Providers update this record themselves, so call before visiting.
How can I verify Warren Fields, M.D.'s license?
NPPES lists Connecticut license number 035098, as entered by the provider. Search the Connecticut Medical Examining Board at https://www.elicense.ct.gov/Lookup/LicenseLookup.aspx. The NPPES record confirms identity only; the state search shows license status, expiration and public orders.
How much does Warren Fields, M.D. prescribe under Medicare Part D?
In 2024, Warren Fields, M.D. had 8,733 Medicare Part D claims for 772 beneficiaries; the average among internal medicine physician prescribers was 2,785. Part D covers Medicare prescriptions only.
What is Warren Fields, M.D.'s Medicare quality score?
The 2023 MIPS final score is 93.6 of 100. The average among 454,083 clinicians with a measured score was 83.5.
Source: CMS National Plan and Provider Enumeration System (NPPES), loaded Aug 27, 2026 (NPPES files on CMS.gov); NUCC Health Care Provider Taxonomy. Medicare files from data.cms.gov. An NPI identifies who bills; it is not a license.
Every figure on PlainDoctor is rendered directly from the federal CMS NPPES registry, Medicare Part D, MIPS, and Open Payments records, no number is typed in by an editor. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error. Data current as of Aug 27, 2026.