Alyssa Y. Castillo, MD
Infectious Disease Physician · Aurora, CO
Alyssa Y. Castillo, MD is an infectious disease physician with a practice address in Aurora, Colorado, and NPI 1659752152, issued on Jun 11, 2015. Check the license (Colorado DR.0068993, as entered in NPPES) on the Colorado Medical Board; the Medicare figures below come from public CMS files.
- Name
- Alyssa Y. Castillo
- Credential
- MD
- Primary taxonomy
- Infectious Disease Physician 207RI0200X
- License numbers
- DR.0068993 CO
L-263365 MA
Self-reported in NPPES; status is on the state search - Practice location
- 1635 Aurora CT FL 7, Aurora, CO 80045
- Phone
- (720) 848-0000
- Enumerated
- Jun 11, 2015
- Record last updated
- May 29, 2025
- Medicare enrollment
- Enrolled (PECOS I20220820000100); accepts Medicare assignment
- Medical or professional school
- University Of Colorado School Of Medicine, Aurora, 2015
- Entity
- Type 1 · individual
8 nearest infectious disease physician records → All 182 in Colorado → Look up another NPI →
Also registered at 1635 Aurora CT FL 7
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Joshua Barocas, M.D.Infectious Disease Physician1518282219
- Robert Clower, PASurgical Physician Assistant1891394334
- Hillary Dunlevy, MDInfectious Disease Physician1811121569
- Sophie Petti, APRN, AGCNS-BCMedical-Surgical Clinical Nurse Specialist1467217562
- Sara Scherrer, M.D.Infectious Disease Physician1063610939
Verify Alyssa Y. Castillo in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersColorado Medical Board
Search for license DR.0068993Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
78% fewer Medicare Part D claims than the average infectious disease physician in 2024
150 Medicare Part D claims for 22 beneficiaries, against an average of 689 among the 7,388 providers of this specialty who prescribed in Part D.
Most prescribed
- Methenamine Hippurate13 claims
- Piperacillin-Tazobactam12 claims
- Rifampin12 claims
- Amoxicillin11 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.
The MIPS final score for 2023 (Medicare payment program): 97.6 of 100
The Merit-based Incentive Payment System score is reported for this clinician. Four categories are weighted into the final score; the average among 454,083 clinicians with a measured score was 83.5.
Source: CMS Quality Payment Program, MIPS performance year 2023; category weights for 2023 (qpp.cms.gov).
Bills Medicare through one group practice
- University Physicians IncorporatedAurora, CO
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Alyssa Y. Castillo among 182 infectious disease physician records in Colorado
Alyssa Y. Castillo, MD is one of 182 infectious disease physician records with a practice address in Colorado. 79% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2015, is newer than 86% of them.
- NPI issued2015 · 86% of these records are older, 10% newer
- In a Medicare fileYes · 79% of these records are
- In the CMS Doctors and Clinicians fileYes · 69% of these records are
- Graduated2015 · median 2004 among the 125 with a school on file
- Record last updated2025 · 68% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 207RI0200X and a Colorado practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
Infectious Disease Physician providers in Colorado
There are 182 infectious disease physician records in Colorado.
All 182 in Colorado → Every provider in Aurora → Infectious Disease Physician nationwide →
The 8 infectious disease physician records with the nearest ZIP codes
- Wendy Armstrong, MDAurora, CO 800451083678783
- Jose Castillo-Mancilla, MDAurora, CO 800451437136462
- Elizabeth Connick, MDAurora, CO 800451255421939
- Molly Eaton, MDAurora, CO 800451174628820
- Carlos Franco-Paredes, M.D.Aurora, CO 800451770595977
- Edward Janoff, MDAurora, CO 800451043311400
- Nancy Madinger, MDAurora, CO 800451326148180
- Bruce McCollister, MDAurora, CO 800451083704662
Common questions
What is Alyssa Y. Castillo, MD's NPI number?
Alyssa Y. Castillo, MD's National Provider Identifier (NPI) is 1659752152, issued on Jun 11, 2015. An NPI identifies a provider in billing; it is not a license.
Where is Alyssa Y. Castillo, MD located?
The NPPES record lists a practice address at 1635 Aurora CT FL 7, Aurora, CO, 80045. Phone: (720) 848-0000. Providers update this record themselves, so call before visiting.
How can I verify Alyssa Y. Castillo, MD's license?
NPPES lists Colorado license number DR.0068993, as entered by the provider. Search the Colorado Medical Board at https://dpo.colorado.gov/Medical. The NPPES record confirms identity only; the state search shows license status, expiration and public orders.
How much does Alyssa Y. Castillo, MD prescribe under Medicare Part D?
In 2024, Alyssa Y. Castillo, MD had 150 Medicare Part D claims for 22 beneficiaries; the average among infectious disease physician prescribers was 689. Part D covers Medicare prescriptions only.
What is Alyssa Y. Castillo, MD's MIPS final score?
The 2023 MIPS final score is 97.6 of 100. The average among 454,083 clinicians with a measured score was 83.5.
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.