Carlos S. Castillo, MD
Psychiatry Physician · Green Bay, WI
Carlos S. Castillo, MD is a psychiatry physician with a practice address in Green Bay, Wisconsin, and NPI 1659358620, issued on Dec 29, 2005. Check the license (Wisconsin 49029, as entered in NPPES) on the Wisconsin Medical Examining Board; the Medicare figures below come from public CMS files.
- Name
- Carlos S. Castillo
- Credential
- MD
- Primary taxonomy
- Psychiatry Physician 2084P0800X
- License number
- 49029 WI
Self-reported in NPPES; status is on the state search - Practice location
- 301 E Saint Joseph St, Green Bay, WI 54301
- Phone
- (920) 433-3630
- Enumerated
- Dec 29, 2005
- Record last updated
- Oct 17, 2011 (not updated in 15 years: call before relying on the address or phone)
- Medicare enrollment
- Enrolled (PECOS I20060228000773); accepts Medicare assignment
- Telehealth
- Offers telehealth (CMS)
- Entity
- Type 1 · individual
8 nearest psychiatry physician records → All 929 in Wisconsin → Look up another NPI →
Also registered at 301 E Saint Joseph St
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Tamara Baldwin, APNPNurse Practitioner1518942937
- Denise Balzola, MSWMental Health Counselor1528043858
- Pamela Baranczyk, LCSW,SACClinical Social Worker1518134014
- Kathryn Bassett, QTTClinical Social Worker1740764182
- Bliss Baudhuin, LPCCounselor1881679124
- Sarah Baumgartner, PHDPsychologist1992086748
Verify Carlos S. Castillo in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersWisconsin Medical Examining Board
Search for license 49029Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
17% fewer Medicare Part D claims than the average psychiatry physician in 2024
827 Medicare Part D claims for 64 beneficiaries, against an average of 1,000 among the 35,054 providers of this specialty who prescribed in Part D. Brand-name drugs were 5% of claims.
Most prescribed
- Quetiapine Fumarate84 claims
- Buspirone Hcl62 claims
- Bupropion Xl47 claims
- Venlafaxine Hcl Er39 claims
- Aripiprazole35 claims
- Prazosin Hcl28 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 one group practice
- Northwest Iowa Mental Health CenterSpencer, IA
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Carlos S. Castillo among 929 psychiatry physician records in Wisconsin
Carlos S. Castillo, 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 2005, is newer than 0% of them.
- NPI issued2005 · 0% of these records are older, 94% newer
- In a Medicare fileYes · 68% of these records are
- In the CMS Doctors and Clinicians fileYes · 47% of these records are
- Graduated1979 · median 2005 among the 439 with a school on file
- Record last updated2011 · 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 Green Bay → Psychiatry Physician nationwide →
The 8 psychiatry physician records with the nearest ZIP codes
- John Charles, MDGreen Bay, WI 543011104801877
- Naciye Kalafat, M.D.Green Bay, WI 543011861459612
- Anthony Marchlewski, MDGreen Bay, WI 543011295710432
- David McMahon, DOGreen Bay, WI 543011457662249
- Victoria Passov, MDGreen Bay, WI 543011891838173
- Emily Rademacher, D.O., M.B.A.Green Bay, WI 543011033406038
- Alexis Rojas, M.D., M.P.H.Green Bay, WI 543011942648191
- Alexandra Rush, M.D.Green Bay, WI 543011295260784
Common questions
What is Carlos S. Castillo, MD's NPI number?
Carlos S. Castillo, MD's National Provider Identifier (NPI) is 1659358620, issued on Dec 29, 2005. An NPI identifies a provider in billing; it is not a license.
Where is Carlos S. Castillo, MD located?
The NPPES record lists a practice address at 301 E Saint Joseph St, Green Bay, WI, 54301. Phone: (920) 433-3630. Providers update this record themselves, so call before visiting.
How can I verify Carlos S. Castillo, MD's license?
NPPES lists Wisconsin license number 49029, 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 Carlos S. Castillo, MD prescribe under Medicare Part D?
In 2024, Carlos S. Castillo, MD had 827 Medicare Part D claims for 64 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.