Thomas G. Castellano, M.D.
General Practice Physician · Loveland, CO
Thomas G. Castellano, M.D. is a general practice physician with a practice address in Loveland, Colorado, and NPI 1912980293, issued on Nov 21, 2005. Check the license (Colorado 0035014, as entered in NPPES) on the Colorado Medical Board; the Medicare figures below come from public CMS files.
- Name
- Thomas G. Castellano
- Credential
- M.D.
- Primary taxonomy
- General Practice Physician 208D00000X
- License numbers
- 0035014 CO
35014 CO
Self-reported in NPPES; status is on the state search - Practice location
- 762 W Eisenhower Blvd, Loveland, CO 80537
- Phone
- (970) 775-7284
- Enumerated
- Nov 21, 2005
- Record last updated
- Dec 27, 2023
- Medicaid ID
- 01350149 CO
- Medicare enrollment
- Enrolled (PECOS I20071115000185); accepts Medicare assignment
- Medical or professional school
- Medical College Of Wisconsin, 1992
- Entity
- Type 1 · individual
8 nearest general practice physician records → All 302 in Colorado → Look up another NPI →
Verify Thomas G. Castellano in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersColorado Medical Board
Search for license 0035014Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
14% fewer Medicare Part D claims than the average general practice physician in 2024
2,616 Medicare Part D claims for 155 beneficiaries, against an average of 3,030 among the 8,395 providers of this specialty who prescribed in Part D. Brand-name drugs were 17% of claims.
Most prescribed
- Atorvastatin Calcium122 claims
- Furosemide105 claims
- Eliquis92 claims
- Levothyroxine Sodium91 claims
- Gabapentin86 claims
- Sertraline Hcl75 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
- Meadows Family Medical Center IncDenver, CO
- Select Physical Therapy Holdings IncLoveland, CO
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Thomas G. Castellano among 302 general practice physician records in Colorado
Thomas G. Castellano, M.D. is one of 302 general practice physician records with a practice address in Colorado. 21% 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, 98% newer
- In a Medicare fileYes · 21% of these records are
- In the CMS Doctors and Clinicians fileYes · 10% of these records are
- Graduated1992 · median 2010 among the 29 with a school on file
- Record last updated2023 · 81% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 208D00000X and a Colorado practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
General Practice Physician providers in Colorado
There are 302 general practice physician records in Colorado.
All 302 in Colorado → Every provider in Loveland → General Practice Physician nationwide →
The 8 general practice physician records with the nearest ZIP codes
- Deborah Martin, MDLoveland, CO 805371952590762
- Pamela Mausner, M.D.Loveland, CO 805371164958245
- Thomas CorsonLoveland, CO 805381265624811
- Venkataperumal Chandrasekaran, MDFort Collins, CO 805241073667317
- Anna Ziegler, MDFort Collins, CO 805241275859860
- Narda Robinson, DO, DVMFort Collins, CO 805211376832733
- Ingrid Hagen, M.D.Estes Park, CO 805171285915264
- Eric Smith, D.O.Dacono, CO 805141679664130
Common questions
What is Thomas G. Castellano, M.D.'s NPI number?
Thomas G. Castellano, M.D.'s National Provider Identifier (NPI) is 1912980293, issued on Nov 21, 2005. An NPI identifies a provider in billing; it is not a license.
Where is Thomas G. Castellano, M.D. located?
The NPPES record lists a practice address at 762 W Eisenhower Blvd, Loveland, CO, 80537. Phone: (970) 775-7284. Providers update this record themselves, so call before visiting.
How can I verify Thomas G. Castellano, M.D.'s license?
NPPES lists Colorado license number 0035014, 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 Thomas G. Castellano, M.D. prescribe under Medicare Part D?
In 2024, Thomas G. Castellano, M.D. had 2,616 Medicare Part D claims for 155 beneficiaries; the average among general practice physician prescribers was 3,030. 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.