Doctor profile · Federal record
Dr. Margaret Johnson
Emergency Medicine Physician (CMS: Emergency Medicine) · Student in an Organized Health Care Education/Training Program · Janesville, WI
- NPI 1821395252
- Accepts Medicare
- 15 yrs in practice
- Female
- Group practice
- No sanctions
Practice & contact
- Primary practice
-
1000 Mineral Point Ave, Mercy Hospital
Janesville, WI 535482940
(608) 756-6000 - Mailing address
-
822 Charing Cross RD
Madison, WI 537046010
Credentials & registration
- NPI registered
- February 2011 — 15 yrs on file
- Profile last updated
- September 7, 2015
- Year of graduation
- 2011 — 15 yrs since
- Specialty taxonomy
- 207P00000X — NUCC code
- State license (1)
- Wisconsin #63954-21
Federal sanctions & exclusions
No sanctions, exclusions or revocations on file
Checked against OIG LEIE on NPI 1821395252. Last verified May 11, 2026.Medicare procedures · 2023
Top services delivered
Total services
392
Distinct HCPCS
5
Medicare allowed
$47,131
| HCPCS | Description | Services | Patients | Avg allowed | |
|---|---|---|---|---|---|
99285 |
Emergency department visit with high level of medical decision making | 174 | 171 | $163 | |
93010 |
Routine electrocardiogram (ecg) using at least 12 leads with interpretation and report only | 84 | 76 | $8 | |
99284 |
Emergency department visit with moderate level of medical decision making | 71 | 71 | $113 | |
99291 |
Critical care, first 30-74 minutes | 45 | 44 | $199 | |
99283 |
Emergency department visit with low level of medical decision making | 18 | 18 | $67 |
In context: peer comparison
Among 19 peers in Janesville Emergency Medicine Physician, average services per provider: 75. This provider delivers 5.2× the peer median.Open Payments
Industry payments received
All-time total
$109
Transactions
1
Manufacturers
1
| Payer (manufacturer) | Industry | Txns | Amount |
|---|---|---|---|
| Abbvie INC. | 1 | $108.84 |
By nature of payment
Medicare Part D · 2023
Top prescriptions
Total claims
47
Patients
47
Total drug cost
$294
| Drug | Type | Claims | Patients | Total cost |
|---|---|---|---|---|
| Hydrocodone-Acetaminophen (Hydrocodone/Acetaminophen) | Brand | 13 | 13 | $51 |
| Ondansetron Odt (Ondansetron) | Brand | 12 | 12 | $59 |
| Cefdinir | Generic | 11 | 11 | $147 |
| Prednisone | Generic | 11 | 11 | $37 |
Hospital affiliations
Frequently asked questions
What is Dr. Margaret Johnson's medical specialty?
Dr. Margaret Johnson practices Emergency Medicine Physician in Janesville, WI.
Where does Dr. Margaret Johnson practice?
Dr. Margaret Johnson practices at 1000 Mineral Point Ave, Janesville, WI 535482940. Office phone: 6087566000.
What is Dr. Margaret Johnson's NPI?
Dr. Margaret Johnson's National Provider Identifier (NPI) is 1821395252, issued by NPPES.
Does Dr. Margaret Johnson accept Medicare assignment?
Yes. Dr. Margaret Johnson accepts Medicare assignment, meaning Medicare-allowed amounts are accepted as full payment for covered services.
What procedures does Dr. Margaret Johnson commonly perform?
Top Medicare-reported procedures in 2023: Emergency department visit with high level of medical decision making (HCPCS 99285); Routine electrocardiogram (ecg) using at least 12 leads with interpretation and report only (HCPCS 93010); Emergency department visit with moderate level of medical decision making (HCPCS 99284). Source: CMS Medicare Physician & Other Practitioners file.