Doctor profile · Federal record
Dr. Warren Fields, M.D.
Internal Medicine Physician (CMS: Internal Medicine) · Mystic, CT
- NPI 1821083999
- Accepts Medicare
- MIPS 89.3 / 100 · 2023
- 35 yrs in practice
- Male
- Group practice
- No sanctions
Practice & contact
- Primary practice
-
200 Sandy Hollow RD
Mystic, CT 063551720
(860) 572-8911
fax (860) 572-7758
Credentials & registration
- NPI registered
- September 2005 — 21 yrs on file
- Profile last updated
- December 22, 2009
- Year of graduation
- 1991 — 35 yrs since
- Specialty taxonomy
- 207R00000X — NUCC code
- State license (1)
- Connecticut #035098
Federal sanctions & exclusions
No sanctions, exclusions or revocations on file
Checked against OIG LEIE on NPI 1821083999. Last verified May 11, 2026.Medicare procedures · 2023
Top services delivered
Total services
2,109
Distinct HCPCS
10
Medicare allowed
$208,035
| HCPCS | Description | Services | Patients | Avg allowed | |
|---|---|---|---|---|---|
99232 |
Subsequent hospital care with moderate levelof medical decision making, if using time, at least 35 minutes | 610 | 264 | $82 | |
99214 |
Established patient office or other outpatient visit, 30-39 minutes | 389 | 219 | $135 | |
99213 |
Established patient office or other outpatient visit, 20-29 minutes | 208 | 119 | $95 | |
G0439 |
Annual wellness visit, includes a personalized prevention plan of service (pps), subsequent visit | 149 | 149 | $139 | |
99239 |
Hospital discharge day management, more than 30 minutes | 90 | 90 | $119 | |
G0008 |
Administration of influenza virus vaccine | 89 | 88 | $32 | |
90662 |
Influenza vaccine split virus, preservative free | 80 | 79 | $70 | |
99233 |
Subsequent hospital care with moderate levelof medical decision making, if using time, at least 50 minutes | 78 | 59 | $123 | |
83036 |
Hemoglobin a1c level | 77 | 48 | $10 | |
90677 |
Pneumococcal conjugate vaccine, 20 valent (pcv20), for intramuscular use | 65 | 65 | $273 |
In context: peer comparison
Among 6 peers in this city , average services per provider: 84. This provider delivers 25× the peer median.Open Payments
Industry payments received
All-time total
$137
Transactions
2
Manufacturers
1
| Payer (manufacturer) | Industry | Txns | Amount |
|---|---|---|---|
| GlaxoSmithKline, LLC. | 2 | $137.12 |
By nature of payment
Medicare Part D · 2023
Top prescriptions
Total claims
2,893
Patients
803
Total drug cost
$39,861
| Drug | Type | Claims | Patients | Total cost |
|---|---|---|---|---|
| Atorvastatin Calcium | Generic | 374 | 120 | $6,537 |
| Losartan Potassium | Generic | 267 | 87 | $4,627 |
| Pantoprazole Sodium | Generic | 251 | 76 | $4,131 |
| Alprazolam | Generic | 245 | 47 | $1,507 |
| Levothyroxine Sodium | Generic | 235 | 53 | $3,812 |
| Amlodipine Besylate | Generic | 191 | 56 | $1,185 |
| Lisinopril | Generic | 188 | 58 | $1,953 |
| Metoprolol Succinate | Generic | 166 | 52 | $3,939 |
| Omeprazole | Generic | 159 | 44 | $2,469 |
| Zolpidem Tartrate | Generic | 151 | 29 | $1,065 |
Hospital affiliations
Frequently asked questions
What is Dr. Warren Fields's medical specialty?
Dr. Warren Fields practices Internal Medicine Physician in Mystic, CT.
Where does Dr. Warren Fields practice?
Dr. Warren Fields practices at 200 Sandy Hollow RD, Mystic, CT 063551720. Office phone: 8605728911.
What is Dr. Warren Fields's NPI?
Dr. Warren Fields's National Provider Identifier (NPI) is 1821083999, issued by NPPES.
Does Dr. Warren Fields accept Medicare assignment?
Yes. Dr. Warren Fields accepts Medicare assignment, meaning Medicare-allowed amounts are accepted as full payment for covered services.
What procedures does Dr. Warren Fields commonly perform?
Top Medicare-reported procedures in 2023: Subsequent hospital care with moderate levelof medical decision making (HCPCS 99232); Established patient office or other outpatient visit (HCPCS 99214); Established patient office or other outpatient visit (HCPCS 99213). Source: CMS Medicare Physician & Other Practitioners file.