Doctor profile · Federal record
Dr. James Greenberg, M.D.
Surgery Physician (CMS: General Surgery) · Surgery Physician · Lake Geneva, WI
- NPI 1164412136
- Accepts Medicare
- 35 yrs in practice
- Licensed in 2 states
- Male
- Group practice
- No sanctions
Practice & contact
- Primary practice
-
N2950 State Road 67
Lake Geneva, WI 531472655
(262) 245-0535
Credentials & registration
- NPI registered
- October 2005 — 21 yrs on file
- Profile last updated
- September 29, 2011
- Year of graduation
- 1991 — 35 yrs since
- Specialty taxonomy
- 208600000X — NUCC code
- State licenses (2)
- Wisconsin #53948 · Illinois #036-087181
- Medicaid
- IL #036087181
Federal sanctions & exclusions
No sanctions, exclusions or revocations on file
Checked against OIG LEIE on NPI 1164412136. Last verified May 11, 2026.Medicare procedures · 2023
Top services delivered
Total services
56
Distinct HCPCS
2
Medicare allowed
$5,441
| HCPCS | Description | Services | Patients | Avg allowed | |
|---|---|---|---|---|---|
99232 |
Subsequent hospital care with moderate levelof medical decision making, if using time, at least 35 minutes | 31 | 20 | $76 | |
99222 |
Initial hospital care with straightforward or low-level medical decision making, if using time, at least 55 minutes | 25 | 24 | $124 |
In context: peer comparison
Among 1 peers in Lake Geneva Surgery Physician, average services per provider: 28. This provider delivers 2.0× the peer median.Medicare Part D · 2023
Top prescriptions
Total claims
199
Patients
130
Total drug cost
$2,056
| Drug | Type | Claims | Patients | Total cost |
|---|---|---|---|---|
| Pantoprazole Sodium | Generic | 84 | 30 | $819 |
| Hydrocodone-Acetaminophen (Hydrocodone/Acetaminophen) | Brand | 47 | 45 | $359 |
| Ondansetron Odt (Ondansetron) | Brand | 43 | 42 | $411 |
| Peg 3350-Electrolyte (Sodium Chloride/Nahco3/Kcl/Peg) | Brand | 13 | 13 | $305 |
| Omeprazole | Generic | 12 | 0 | $162 |
Frequently asked questions
What is Dr. James Greenberg's medical specialty?
Dr. James Greenberg practices Surgery Physician in Lake Geneva, WI.
Where does Dr. James Greenberg practice?
Dr. James Greenberg practices at N2950 State Road 67, Lake Geneva, WI 531472655. Office phone: 2622450535.
What is Dr. James Greenberg's NPI?
Dr. James Greenberg's National Provider Identifier (NPI) is 1164412136, issued by NPPES.
Does Dr. James Greenberg accept Medicare assignment?
Yes. Dr. James Greenberg accepts Medicare assignment, meaning Medicare-allowed amounts are accepted as full payment for covered services.
What procedures does Dr. James Greenberg commonly perform?
Top Medicare-reported procedures in 2023: 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.