Doctor profile · Federal record
Dr. Freddie Mertzig, APNP
Gerontology Nurse Practitioner (CMS: Nurse Practitioner) · Nurse Practitioner · Milwaukee, WI
- NPI 1922523836
- Accepts Medicare
- 9 yrs in practice
- Male
- Group practice
- No sanctions
Practice & contact
- Primary practice
-
3237 S 16Th St
Milwaukee, WI 532154526
(262) 647-5000 - Mailing address
-
1224 N Prospect Ave Apt 7S
Milwaukee, WI 532023001
Credentials & registration
- NPI registered
- August 2017 — 9 yrs on file
- Profile last updated
- September 25, 2017
- Year of graduation
- 2017 — 9 yrs since
- Specialty taxonomy
- 363LG0600X — NUCC code
- State license (1)
- Wisconsin #7889-33
Federal sanctions & exclusions
No sanctions, exclusions or revocations on file
Checked against OIG LEIE on NPI 1922523836. Last verified May 11, 2026.Medicare procedures · 2023
Top services delivered
Total services
1,214
Distinct HCPCS
10
Medicare allowed
$47,910
| HCPCS | Description | Services | Patients | Avg allowed | |
|---|---|---|---|---|---|
99213 |
Established patient office or other outpatient visit, 20-29 minutes | 410 | 240 | $73 | |
36415 |
Insertion of needle into vein for collection of blood sample | 162 | 112 | $8 | |
85610 |
Blood test, clotting time | 118 | 37 | $4 | |
99214 |
Established patient office or other outpatient visit, 30-39 minutes | 112 | 67 | $104 | |
80048 |
Blood test, basic group of blood chemicals (calcium, total) | 92 | 68 | $8 | |
85025 |
Complete blood cell count (red cells, white blood cell, platelets), automated test and automated differential white blood cell count | 87 | 71 | $8 | |
80053 |
Blood test, comprehensive group of blood chemicals | 44 | 40 | $10 | |
81001 |
Manual urinalysis test with examination using microscope, automated | 32 | 28 | $3 | |
81003 |
Automated urinalysis test | 28 | 25 | $2 | |
69210 |
Removal of impacted ear wax | 26 | 24 | $38 |
In context: peer comparison
Among 4 peers in Milwaukee Gerontology Nurse Practitioner, average services per provider: 110. This provider delivers 11× the peer median.Open Payments
Industry payments received
All-time total
$14
Transactions
1
Manufacturers
1
| Payer (manufacturer) | Industry | Txns | Amount |
|---|---|---|---|
| Abbvie INC. | 1 | $14.05 |
By nature of payment
Medicare Part D · 2023
Top prescriptions
Total claims
3,542
Patients
1,291
Total drug cost
$48,724
| Drug | Type | Claims | Patients | Total cost |
|---|---|---|---|---|
| Atorvastatin Calcium | Generic | 450 | 155 | $6,748 |
| Losartan Potassium | Generic | 370 | 126 | $5,880 |
| Levothyroxine Sodium | Generic | 303 | 97 | $4,889 |
| Amlodipine Besylate | Generic | 283 | 86 | $2,523 |
| Lisinopril | Generic | 260 | 97 | $2,789 |
| Hydrochlorothiazide | Generic | 214 | 75 | $1,092 |
| Omeprazole | Generic | 212 | 75 | $3,410 |
| Pravastatin Sodium | Generic | 207 | 65 | $3,764 |
| Prednisone | Generic | 203 | 155 | $943 |
| Allopurinol | Generic | 200 | 58 | $3,790 |
Frequently asked questions
What is Dr. Freddie Mertzig's medical specialty?
Dr. Freddie Mertzig practices Gerontology Nurse Practitioner in Milwaukee, WI.
Where does Dr. Freddie Mertzig practice?
Dr. Freddie Mertzig practices at 3237 S 16Th St, Milwaukee, WI 532154526. Office phone: 2626475000.
What is Dr. Freddie Mertzig's NPI?
Dr. Freddie Mertzig's National Provider Identifier (NPI) is 1922523836, issued by NPPES.
Does Dr. Freddie Mertzig accept Medicare assignment?
Yes. Dr. Freddie Mertzig accepts Medicare assignment, meaning Medicare-allowed amounts are accepted as full payment for covered services.
What procedures does Dr. Freddie Mertzig commonly perform?
Top Medicare-reported procedures in 2023: Established patient office or other outpatient visit (HCPCS 99213); Insertion of needle into vein for collection of blood sample (HCPCS 36415); Blood test, clotting time (HCPCS 85610). Source: CMS Medicare Physician & Other Practitioners file.