Stephen K. Sponagle, MD
Psychiatry Physician · Milwaukee, WI
Stephen K. Sponagle, MD is a psychiatry physician with a practice address in Milwaukee, Wisconsin, and NPI 1255382925, issued on May 15, 2006. Check the license (Wisconsin 47580, as entered in NPPES) on the Wisconsin Medical Examining Board; the Medicare figures below come from public CMS files.
- Name
- Stephen K. Sponagle
- Credential
- MD
- Primary taxonomy
- Psychiatry Physician 2084P0800X
- License number
- 47580 WI
Self-reported in NPPES; status is on the state search - Practice location
- 1155 North Mayfair Road, Milwaukee, WI 53226
- Phone
- (414) 805-3666
- Enumerated
- May 15, 2006
- Record last updated
- Jul 8, 2007 (not updated in 19 years: call before relying on the address or phone)
- Medicaid ID
- 34601100 WI
- Medicare enrollment
- Enrolled (PECOS I20050113000480); accepts Medicare assignment
- Medical or professional school
- University Of South Florida College Of Medicine, 1999
- Entity
- Type 1 · individual
8 nearest psychiatry physician records → All 929 in Wisconsin → Look up another NPI →
Also registered at 1155 North Mayfair Road
A shared address usually means a shared clinic or building; it does not show who employs whom.
- John Lamberton, MDPsychiatry Physician1871544627
- Jo Weis, PHDAddiction (Substance Use Disorder) Psychologist1841242294
Verify Stephen K. Sponagle in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersWisconsin Medical Examining Board
Search for license 47580Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
2.1 times the Medicare Part D claims of the average psychiatry physician in 2024
2,078 Medicare Part D claims for 135 beneficiaries, against an average of 1,000 among the 35,054 providers of this specialty who prescribed in Part D. Brand-name drugs were 4% of claims.
Most prescribed
- Quetiapine Fumarate213 claims
- Mirtazapine161 claims
- Trazodone Hcl128 claims
- Clonazepam125 claims
- Bupropion Xl114 claims
- Gabapentin69 claims
Source: CMS Medicare Part D Prescribers by Provider and Drug, 2024 (data.cms.gov). Part D covers prescriptions for Medicare patients only; drugs with fewer than 11 claims are not published.
Bills Medicare through 2 group practices
- 16TH Street Community Health Center Inc.Milwaukee, WI
- Wisconsin Community Services IncMilwaukee, WI
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Stephen K. Sponagle among 929 psychiatry physician records in Wisconsin
Stephen K. Sponagle, MD is one of 929 psychiatry physician records with a practice address in Wisconsin. 68% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2006, is newer than 6% of them.
- NPI issued2006 · 6% of these records are older, 50% newer
- In a Medicare fileYes · 68% of these records are
- In the CMS Doctors and Clinicians fileYes · 47% of these records are
- Graduated1999 · median 2005 among the 439 with a school on file
- Record last updated2007 · 52% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 2084P0800X and a Wisconsin practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
Psychiatry Physician providers in Wisconsin
There are 929 psychiatry physician records in Wisconsin.
All 929 in Wisconsin → Every provider in Milwaukee → Psychiatry Physician nationwide →
The 8 psychiatry physician records with the nearest ZIP codes
- Mary Alvarez, MDMilwaukee, WI 532261669424230
- Jon Berlin, MDMilwaukee, WI 532261174574529
- David Bresnahan, MDMilwaukee, WI 532261376595884
- Carlyle Chan, MDMilwaukee, WI 532261528019924
- Nancy Check, MDMilwaukee, WI 532261336190719
- John Lamberton, MDMilwaukee, WI 532261871544627
- Joseph Layde, MDMilwaukee, WI 532261265483770
- Hillard Moffic, MDMilwaukee, WI 532261932150687
Common questions
What is Stephen K. Sponagle, MD's NPI number?
Stephen K. Sponagle, MD's National Provider Identifier (NPI) is 1255382925, issued on May 15, 2006. An NPI identifies a provider in billing; it is not a license.
Where is Stephen K. Sponagle, MD located?
The NPPES record lists a practice address at 1155 North Mayfair Road, Milwaukee, WI, 53226. Phone: (414) 805-3666. Providers update this record themselves, so call before visiting.
How can I verify Stephen K. Sponagle, MD's license?
NPPES lists Wisconsin license number 47580, as entered by the provider. Search the Wisconsin Medical Examining Board at https://dsps.wi.gov/Pages/BoardsCouncils/MEB/Default.aspx. The NPPES record confirms identity only; the state search shows license status, expiration and public orders.
How much does Stephen K. Sponagle, MD prescribe under Medicare Part D?
In 2024, Stephen K. Sponagle, MD had 2,078 Medicare Part D claims for 135 beneficiaries; the average among psychiatry physician prescribers was 1,000. Part D covers Medicare prescriptions only.
Source: CMS National Plan and Provider Enumeration System (NPPES), file of Aug 9, 2026 (NPPES files on CMS.gov); NUCC Health Care Provider Taxonomy. Medicare files from data.cms.gov. An NPI identifies who bills; it is not a license.
Figures on PlainDoctor are read from the federal files each page names (CMS NPPES, Medicare Part D, MIPS, Open Payments; the HHS-OIG exclusion list only as counts) and from Census population estimates, with the file date shown beside them. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error. Data current as of Aug 9, 2026.