Fernando Ernesto Casado Castillo, M.D.
Infectious Disease Physician · Renton, WA
Fernando Ernesto Casado Castillo, M.D. is an infectious disease physician with a practice address in Renton, Washington, and NPI 1528411774, issued on Jul 22, 2016. Check the license (Washington MD61417522, as entered in NPPES) on the Washington Medical Commission; the Medicare figures below come from public CMS files.
- Name
- Fernando Ernesto Casado Castillo
- Credential
- M.D.
- Primary taxonomy
- Infectious Disease Physician 207RI0200X
- License numbers
- MD61417522 WA
MD-45957 IA
74676 WI
Self-reported in NPPES; status is on the state search - Practice location
- 4033 Talbot RD S Ste 570, Renton, WA 98055
- Phone
- (425) 690-3487
- Enumerated
- Jul 22, 2016
- Record last updated
- Mar 28, 2024
- Fax
- (425) 690-9087
- Medicare enrollment
- Enrolled (PECOS I20250312000977); accepts Medicare assignment
- Telehealth
- Offers telehealth (CMS)
- Entity
- Type 1 · individual
Also registered at 4033 Talbot RD S Ste 570
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Amanda Casto, M.D., PH.D.Infectious Disease Physician1497012090
- Michele DespreauxInternal Medicine Physician1346326147
- Sarah Hillebrand, APRNFamily Nurse Practitioner1740646389
- Michael Hori, MDInfectious Disease Physician1205918208
- Yen-Tsun Lai, M.D.Geriatric Medicine (Internal Medicine) Physician1790727535
- Lindsay Nofziger, NPNurse Practitioner1306365598
Verify Fernando Ernesto Casado Castillo in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersWashington Medical Commission
Search for license MD61417522Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
48% fewer Medicare Part D claims than the average infectious disease physician in 2024
360 Medicare Part D claims for 136 beneficiaries, against an average of 689 among the 7,388 providers of this specialty who prescribed in Part D. 42 claims were for opioids.
Most prescribed
- Oxycodone Hcl29 claims
- Prednisone17 claims
- Atorvastatin Calcium15 claims
- Torsemide11 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 practice group's MIPS final score for 2023 (Medicare payment program): 69.2 of 100
The Merit-based Incentive Payment System score is reported for the practice group, not for one clinician alone. 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, group reporting; category weights for 2023 (qpp.cms.gov).
Bills Medicare through 2 group practices
- Access Telecare PLLCPlacitas, NM
- South Sound Inpatient Physicians PLLCTacoma, WA
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Infectious Disease Physician providers in Washington
There are 263 infectious disease physician records in Washington.
Other infectious disease physician records in Washington
- Jan AgostiSeattle, WA1912082744
- Henry Arguinchona, MDSpokane, WA1740228170
- Tara Babu, MDSeattle, WA1790945871
- Martin Backer, MDYakima, WA1629275060
- Jared Baeten, MDSeattle, WA1043201684
- Sarah BakerSeattle, WA1952864068
- Neron Balassanian, MDBellevue, WA1437452034
- Christopher Baliga, MDSeattle, WA1154534170
- Snehal Bansod, MDSilverdale, WA1083116834
- Neil Barg, MDYakima, WA1134213457
Common questions
What is Fernando Ernesto Casado Castillo, M.D.'s NPI number?
Fernando Ernesto Casado Castillo, M.D.'s National Provider Identifier (NPI) is 1528411774, issued on Jul 22, 2016. An NPI identifies a provider in billing; it is not a license.
Where is Fernando Ernesto Casado Castillo, M.D. located?
The NPPES record lists a practice address at 4033 Talbot RD S Ste 570, Renton, WA, 98055. Phone: (425) 690-3487. Providers update this record themselves, so call before visiting.
How can I verify Fernando Ernesto Casado Castillo, M.D.'s license?
NPPES lists Washington license number MD61417522, as entered by the provider. Search the Washington Medical Commission at https://wahelms.my.site.com/s/license-search. The NPPES record confirms identity only; the state search shows license status, expiration and public orders.
How much does Fernando Ernesto Casado Castillo, M.D. prescribe under Medicare Part D?
In 2024, Fernando Ernesto Casado Castillo, M.D. had 360 Medicare Part D claims for 136 beneficiaries; the average among infectious disease physician prescribers was 689. Part D covers Medicare prescriptions only.
What is Fernando Ernesto Casado Castillo, M.D.'s MIPS final score?
The 2023 MIPS final score is 69.2 of 100, reported for the practice group. 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.