Stephen Nitz, M.D.
NPI 1518958651 · Family Medicine Physician · Rockford, IL
Enrolled with Medicare as Practitioner - Family Practice · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Stephen Nitz, M.D. is a Family Medicine Physician provider in Rockford, IL (NPI 1518958651).
Provider details
- NPI number
- 1518958651
- Entity type
- Individual
- Primary specialty
- Family Medicine PhysicianAllopathic & Osteopathic Physicians
- Credential
- M.D.
- Sex
- Male
- Sole proprietor
- No
- License
- 036105695 (IL)
Specialties & taxonomies
Allopathic & Osteopathic Physicians
Allopathic & Osteopathic Physicians
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure25% of score
20 yrs in NPPES registry
- Profile completeness25% of score
100% of core fields populated
- Practice footprint15% of score
2 documented practice locations
- Medicare service volume (vs. specialty peers)25% of score
167 Medicare services, 2024 (ranked within specialty)
- Open Payments transparency10% of score
Has Open Payments disclosures (2024)
Medicare volume is ranked against active providers in the same specialty. Signals a provider has no public data for (e.g. Medicare claims) are left out of the score entirely — never counted as zero — so providers without that data are not penalized. See the full formula and weights in our .
What this provider does (Medicare)
Based on Medicare fee-for-service claims, 2024; not all care is captured.
| Service (HCPCS) | Medicare services | Typical Medicare-allowed (2024) |
|---|---|---|
| Established Patient Office Or Other Outpatient Visit With High Level of Medical Decision Making, If Using Time, 40 Minutes Or More99215 | 167 | $173 |
Typical Medicare-allowed amounts for these services range $173–$173 (2024). The Medicare-allowed amount is what Medicare recognizes for a service under fee-for-service — a reference figure for 2024, not a price quote and not what you would be billed. Medicare Part B covers roughly an eighth of all NPIs (65+ skew); services with fewer than 11 beneficiaries are suppressed by CMS. Source: CMS Medicare Physician & Other Practitioners, by Provider & Service.
What this provider prescribes (Medicare Part D)
Top drugs by Medicare Part D claim volume, 2024 · 20 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Levothyroxine Sodium | 168 | 35 |
| Liothyronine Sodium | 155 | 46 |
| Progesterone, Micronizedbrand: Progesterone | 60 | 15 |
| Valacyclovir Hclbrand: Valacyclovir | 29 | 12 |
| Anastrozole | 24 | — |
| Spironolactone | 23 | — |
| Nystatin | 21 | 14 |
Transparency — industry payments
Based on CMS Open Payments, 2024; not all care is captured.
$70 across 4 records (Open Payments 2024)
Open Payments discloses payments and transfers of value (meals, travel, consulting, research, royalties) from drug and device makers to providers. This is a transparency signal, not a verdict — such payments are legal and common, and their presence is neither an endorsement nor a criticism. Source: CMS Open Payments, program year 2024.
Practice location
Mailing address
Additional practice locations (1)
- 402 W Lake StFriendship, WI 53934-9699Phone: (608) 339-3331
Registry dates
- Enumerated
- 2005-10-28
- Last updated
- 2019-12-12
- Certified
- 2019-12-12
Frequently asked questions
- What is Stephen Nitz's NPI number?
- Stephen Nitz's National Provider Identifier (NPI) is 1518958651, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Stephen Nitz's specialty?
- Stephen Nitz is listed in the NPPES registry with a primary specialty of Family Medicine Physician (Allopathic & Osteopathic Physicians).
- Where is Stephen Nitz located?
- Stephen Nitz's practice location on file with NPPES is 7177 Crimson Ridge Dr, Rockford, IL 61107-6235.
- What is Stephen Nitz's phone number?
- The practice phone number listed in the NPPES registry for Stephen Nitz is (815) 734-6061.
- Does Stephen Nitz accept Medicare?
- Stephen Nitz is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Stephen Nitz's NPI active?
- Yes — Stephen Nitz's NPI (1518958651) is active in the NPPES registry as of the last update on 2019-12-12.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.