Doctor profile · Federal record
Dr. Gehrig Williamson, MD
Family Medicine Physician (CMS: Family Practice) · Appleton, WI
- NPI 1326157033
- Accepts Medicare
- 21 yrs in practice
- Male
- Group practice
- No sanctions
Practice & contact
- Primary practice
-
3916 N Intertech CT
Appleton, WI 549136957
(920) 996-1046
Credentials & registration
- NPI registered
- August 2006 — 20 yrs on file
- Profile last updated
- November 1, 2016
- Year of graduation
- 2005 — 21 yrs since
- Specialty taxonomy
- 207Q00000X — NUCC code
- State license (1)
- Wisconsin #49554
- Medicaid
- WI #34894100
Federal sanctions & exclusions
No sanctions, exclusions or revocations on file
Checked against OIG LEIE on NPI 1326157033. Last verified May 11, 2026.Medicare procedures · 2023
Top services delivered
Total services
1,346
Distinct HCPCS
10
Medicare allowed
$57,514
| HCPCS | Description | Services | Patients | Avg allowed | |
|---|---|---|---|---|---|
36415 |
Insertion of needle into vein for collection of blood sample | 267 | 120 | $8 | |
99214 |
Established patient office or other outpatient visit, 30-39 minutes | 187 | 117 | $121 | |
80048 |
Blood test, basic group of blood chemicals (calcium, total) | 102 | 73 | $8 | |
80061 |
Blood test, lipids (cholesterol and triglycerides) | 97 | 97 | $13 | |
83036 |
Hemoglobin a1c level | 93 | 63 | $10 | |
G0439 |
Annual wellness visit, includes a personalized prevention plan of service (pps), subsequent visit | 89 | 89 | $122 | |
99213 |
Established patient office or other outpatient visit, 20-29 minutes | 88 | 71 | $85 | |
84460 |
Liver enzyme (sgpt), level | 65 | 62 | $5 | |
85025 |
Complete blood cell count (red cells, white blood cell, platelets), automated test and automated differential white blood cell count | 44 | 30 | $8 | |
G0103 |
Prostate cancer screening; prostate specific antigen test (psa) | 44 | 44 | $19 |
In context: peer comparison
Among 41 peers in this city , average services per provider: 55. This provider delivers 24× the peer median.Medicare Part D · 2023
Top prescriptions
Total claims
2,749
Patients
900
Total drug cost
$95,054
| Drug | Type | Claims | Patients | Total cost |
|---|---|---|---|---|
| Atorvastatin Calcium | Generic | 407 | 119 | $6,295 |
| Lisinopril | Generic | 322 | 93 | $2,816 |
| Shingrix (Varicella-Zoster Ge/As01b/Pf) | Brand | 275 | 200 | $59,404 |
| Omeprazole | Generic | 215 | 50 | $3,006 |
| Losartan Potassium | Generic | 194 | 52 | $2,681 |
| Levothyroxine Sodium | Generic | 185 | 51 | $3,481 |
| Simvastatin | Generic | 160 | 47 | $1,806 |
| Metformin Hcl Er (Metformin Hcl) | Brand | 153 | 45 | $2,775 |
| Sertraline Hcl | Generic | 147 | 40 | $1,917 |
| Metoprolol Succinate | Generic | 142 | 41 | $2,806 |
Hospital affiliations
Frequently asked questions
What is Dr. Gehrig Williamson's medical specialty?
Dr. Gehrig Williamson practices Family Medicine Physician in Appleton, WI.
Where does Dr. Gehrig Williamson practice?
Dr. Gehrig Williamson practices at 3916 N Intertech CT, Appleton, WI 549136957. Office phone: 9209961046.
What is Dr. Gehrig Williamson's NPI?
Dr. Gehrig Williamson's National Provider Identifier (NPI) is 1326157033, issued by NPPES.
Does Dr. Gehrig Williamson accept Medicare assignment?
Yes. Dr. Gehrig Williamson accepts Medicare assignment, meaning Medicare-allowed amounts are accepted as full payment for covered services.
What procedures does Dr. Gehrig Williamson commonly perform?
Top Medicare-reported procedures in 2023: Insertion of needle into vein for collection of blood sample (HCPCS 36415); Established patient office or other outpatient visit (HCPCS 99214); Blood test, basic group of blood chemicals (calcium, total) (HCPCS 80048). Source: CMS Medicare Physician & Other Practitioners file.