Stephen Klos, M.D.
NPI 1003951617 · Family Medicine Physician · Milwaukee, WI
Enrolled with Medicare as Practitioner - Family Practice · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Stephen Klos, M.D. is a Family Medicine Physician provider in Milwaukee, WI (NPI 1003951617).
Provider details
- NPI number
- 1003951617
- Entity type
- Individual
- Primary specialty
- Family Medicine PhysicianAllopathic & Osteopathic Physicians
- Credential
- M.D.
- Sex
- Male
- Sole proprietor
- No
- License
- 50481 (WI)
Specialties & taxonomies
Allopathic & Osteopathic Physicians
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure28% of score
19 yrs in NPPES registry
- Profile completeness28% of score
100% of core fields populated
- Practice footprint17% of score
1 documented practice location
- Medicare service volume (vs. specialty peers)28% of score
165 Medicare services, 2024 (ranked within specialty)
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 methodology.
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 Moderate Level of Decision Making, If Using Time, 30 Minutes Or More99214 | 97 | $120 |
| Established Patient Office Or Other Outpatient Visit With Low Level OD Decision Making, If Using Time, 20 Minutes Or More99213 | 25 | $85 |
| New Patient Office Or Other Outpatient Visit With Moderate Level of Medical Decision Making, If Using Time, 45 Minutes Or More99204 | 16 | $156 |
| New Patient Office Or Other Outpatient Visit With Low Level of Medical Decision Making, If Using Time, 30 Minutes Or More99203 | 14 | $104 |
| Inhalation Treatment for Airway Obstruction Or Sputum Production94640 | 13 | $7 |
Typical Medicare-allowed amounts for these services range $7–$156 (2024). The Medicare-allowed amount is what Medicare recognizes for a service under fee-for-service — a reference figure for 2024, 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 · 19 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Prednisone | 223 | 214 |
| Amoxicillin/Potassium Clavbrand: Amoxicillin-Clavulanate Potass | 58 | 58 |
| Tizanidine Hcl | 38 | 36 |
| Albuterol Sulfatebrand: Albuterol Sulfate Hfa | 37 | 26 |
| Cefdinir | 35 | 34 |
| Doxycycline Hyclate | 32 | 32 |
| Cephalexin | 22 | 21 |
Practice location
Mailing address
Registry dates
- Enumerated
- 2007-02-21
- Last updated
- 2024-12-09
- Certified
- 2024-12-09
Frequently asked questions
- What is Stephen Klos's NPI number?
- Stephen Klos's National Provider Identifier (NPI) is 1003951617, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Stephen Klos's specialty?
- Stephen Klos is listed in the NPPES registry with a primary specialty of Family Medicine Physician (Allopathic & Osteopathic Physicians).
- Where is Stephen Klos located?
- Stephen Klos's practice location on file with NPPES is 3003 W Good Hope Rd, Milwaukee, WI 53209-2042.
- What is Stephen Klos's phone number?
- The practice phone number listed in the NPPES registry for Stephen Klos is (414) 352-3100.
- Does Stephen Klos accept Medicare?
- Stephen Klos is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Stephen Klos's NPI active?
- Yes — Stephen Klos's NPI (1003951617) is active in the NPPES registry as of the last update on 2024-12-09.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.