Doctor profile · Federal record
Dr. Neal Greenfield, MD
Critical Care Medicine (Internal Medicine) Physician (CMS: Critical Care (Intensivists)) · Internal Medicine Physician · Internal Medicine Physician · Internal Medicine Physician · Winfield, IL
- NPI 1700094364
- Accepts Medicare
- MIPS 91.3 / 100 · 2023
- 21 yrs in practice
- Licensed in 4 states
- Male
- Group practice
- No sanctions
Practice & contact
- Primary practice
-
25 N Winfield RD
Winfield, IL 601901295
(630) 933-4700
fax (630) 933-4427
Credentials & registration
- NPI registered
- May 2007 — 19 yrs on file
- Profile last updated
- March 17, 2017
- Year of graduation
- 2005 — 21 yrs since
- Specialty taxonomy
- 207RC0200X — NUCC code
- State licenses (4)
- Illinois #036122989 · Virginia #0101242708 · Washington #MD 60002695 · Oregon #MD28328
- Medicaid
- IL #036122989
Federal sanctions & exclusions
No sanctions, exclusions or revocations on file
Checked against OIG LEIE on NPI 1700094364. Last verified May 11, 2026.Medicare procedures · 2023
Top services delivered
Total services
382
Distinct HCPCS
4
Medicare allowed
$58,275
| HCPCS | Description | Services | Patients | Avg allowed | |
|---|---|---|---|---|---|
99291 |
Critical care, first 30-74 minutes | 184 | 141 | $225 | |
99232 |
Subsequent hospital care with moderate levelof medical decision making, if using time, at least 35 minutes | 157 | 120 | $81 | |
99222 |
Initial hospital care with straightforward or low-level medical decision making, if using time, at least 55 minutes | 25 | 24 | $137 | |
36620 |
Insertion of artery tube for blood sampling or infusion through skin | 16 | 16 | $47 |
In context: peer comparison
Among 7 peers in Winfield Critical Care Medicine (Internal Medicine) Physician, average services per provider: 72. This provider delivers 5.3× the peer median.Open Payments
Industry payments received
All-time total
$29
Transactions
1
Manufacturers
1
| Payer (manufacturer) | Industry | Txns | Amount |
|---|---|---|---|
| Abiomed | 1 | $29.29 |
By nature of payment
Hospital affiliations
Frequently asked questions
What is Dr. Neal Greenfield's medical specialty?
Dr. Neal Greenfield practices Critical Care Medicine (Internal Medicine) Physician in Winfield, IL.
Where does Dr. Neal Greenfield practice?
Dr. Neal Greenfield practices at 25 N Winfield RD, Winfield, IL 601901295. Office phone: 6309334700.
What is Dr. Neal Greenfield's NPI?
Dr. Neal Greenfield's National Provider Identifier (NPI) is 1700094364, issued by NPPES.
Does Dr. Neal Greenfield accept Medicare assignment?
Yes. Dr. Neal Greenfield accepts Medicare assignment, meaning Medicare-allowed amounts are accepted as full payment for covered services.
What procedures does Dr. Neal Greenfield commonly perform?
Top Medicare-reported procedures in 2023: Critical care (HCPCS 99291); Subsequent hospital care with moderate levelof medical decision making (HCPCS 99232); Initial hospital care with straightforward or low-level medical decision making (HCPCS 99222). Source: CMS Medicare Physician & Other Practitioners file.