Doctor profile · Federal record
Dr. Ryan Holzmacher, MD
Internal Medicine Physician (CMS: Internal Medicine) · Nephrology Physician · Pain Medicine Physician · Greenfield, WI
- NPI 1598700601
- Accepts Medicare
- 27 yrs in practice
- Male
- Group practice
- No sanctions
Practice & contact
- Primary practice
-
5017 S 110Th St
Greenfield, WI 532283131
(414) 301-3531 - Mailing address
-
19050 Blue Ridge CT
Brookfield, WI 530455103
Credentials & registration
- NPI registered
- June 2006 — 20 yrs on file
- Profile last updated
- September 20, 2024
- Year of graduation
- 1999 — 27 yrs since
- Specialty taxonomy
- 207R00000X — NUCC code
- State license (1)
- Wisconsin #42642-020
- Medicaid
- WI #34749000
Federal sanctions & exclusions
No sanctions, exclusions or revocations on file
Checked against OIG LEIE on NPI 1598700601. Last verified May 11, 2026.Medicare procedures · 2023
Top services delivered
Total services
3,864
Distinct HCPCS
6
Medicare allowed
$369,334
| HCPCS | Description | Services | Patients | Avg allowed | |
|---|---|---|---|---|---|
99232 |
Subsequent hospital care with moderate levelof medical decision making, if using time, at least 35 minutes | 2,313 | 491 | $74 | |
99233 |
Subsequent hospital care with moderate levelof medical decision making, if using time, at least 50 minutes | 716 | 313 | $111 | |
99309 |
Subsequent nursing facility care with moderate level of medical decision making, per day, if using time, at least 30 minutes | 284 | 165 | $100 | |
99223 |
Initial hospital care with moderate level of medical decision making, if using time, at least 75 minutes | 275 | 264 | $163 | |
99306 |
Initial nursing facility care with high level of medical decision making, per day, if using time, at least 45 minutes | 174 | 161 | $172 | |
99310 |
Subsequent nursing facility care with high level of medical decision making, per day, if using time, at least 45 minutes | 102 | 80 | $144 |
In context: peer comparison
Among 4 peers in this city , average services per provider: 233. This provider delivers 17× the peer median.Medicare Part D · 2023
Top prescriptions
Total claims
46
Patients
0
Total drug cost
$3,209
| Drug | Type | Claims | Patients | Total cost |
|---|---|---|---|---|
| Gabapentin | Generic | 20 | 0 | $361 |
| Hydroxychloroquine Sulfate | Generic | 15 | 0 | $570 |
| Myrbetriq (Mirabegron) | Brand | 11 | 0 | $2,278 |
Hospital affiliations
Frequently asked questions
What is Dr. Ryan Holzmacher's medical specialty?
Dr. Ryan Holzmacher practices Internal Medicine Physician in Greenfield, WI.
Where does Dr. Ryan Holzmacher practice?
Dr. Ryan Holzmacher practices at 5017 S 110Th St, Greenfield, WI 532283131. Office phone: 4143013531.
What is Dr. Ryan Holzmacher's NPI?
Dr. Ryan Holzmacher's National Provider Identifier (NPI) is 1598700601, issued by NPPES.
Does Dr. Ryan Holzmacher accept Medicare assignment?
Yes. Dr. Ryan Holzmacher accepts Medicare assignment, meaning Medicare-allowed amounts are accepted as full payment for covered services.
What procedures does Dr. Ryan Holzmacher commonly perform?
Top Medicare-reported procedures in 2023: Subsequent hospital care with moderate levelof medical decision making (HCPCS 99232); Subsequent hospital care with moderate levelof medical decision making (HCPCS 99233); Subsequent nursing facility care with moderate level of medical decision making (HCPCS 99309). Source: CMS Medicare Physician & Other Practitioners file.