Stephen Sponagle, MD
NPI 1255382925 · Psychiatry Physician · Milwaukee, WI
Enrolled with Medicare as Practitioner - Psychiatry · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Stephen Sponagle, MD is a Psychiatry Physician provider in Milwaukee, WI (NPI 1255382925).
Provider details
- NPI number
- 1255382925
- Entity type
- Individual
- Primary specialty
- Psychiatry PhysicianAllopathic & Osteopathic Physicians
- Credential
- MD
- Sex
- Male
- Sole proprietor
- No
- License
- 47580 (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
20 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
37 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) |
|---|---|---|
| Psychotherapy, 30 Minutes90832 | 37 | $74 |
Typical Medicare-allowed amounts for these services range $74–$74 (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 · 36 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Quetiapine Fumarate | 213 | 28 |
| Mirtazapine | 161 | 26 |
| Trazodone Hcl | 128 | 20 |
| Clonazepam | 125 | 20 |
| Bupropion Hclbrand: Bupropion Xl | 114 | 18 |
| Gabapentin | 69 | 12 |
| Aripiprazole |
Practice location
Mailing address
Registry dates
- Enumerated
- 2006-05-15
- Last updated
- 2007-07-08
Frequently asked questions
- What is Stephen Sponagle's NPI number?
- Stephen Sponagle's National Provider Identifier (NPI) is 1255382925, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Stephen Sponagle's specialty?
- Stephen Sponagle is listed in the NPPES registry with a primary specialty of Psychiatry Physician (Allopathic & Osteopathic Physicians).
- Where is Stephen Sponagle located?
- Stephen Sponagle's practice location on file with NPPES is 1155 North Mayfair Road, Milwaukee, WI 53226.
- What is Stephen Sponagle's phone number?
- The practice phone number listed in the NPPES registry for Stephen Sponagle is (414) 805-3666.
- Does Stephen Sponagle accept Medicare?
- Stephen Sponagle is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Stephen Sponagle's NPI active?
- Yes — Stephen Sponagle's NPI (1255382925) is active in the NPPES registry as of the last update on 2007-07-08.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.