Daniel Castro, MD
Internal Medicine Physician · Morristown, TN
Daniel Castro, MD is an internal medicine physician with a practice address in Morristown, Tennessee, and NPI 1821002700, issued on Jul 28, 2006. Check the license (Tennessee MD0000056844, as entered in NPPES) on the Tennessee Board of Medical Examiners; the Medicare figures below come from public CMS files.
- Name
- Daniel Castro
- Credential
- MD
- Primary taxonomy
- Internal Medicine Physician 207R00000X
- License number
- MD0000056844 TN
Self-reported in NPPES; status is on the state search - Practice location
- 2231 Sandstone Dr, Morristown, TN 37814
- Phone
- (423) 616-0625
- Enumerated
- Jul 28, 2006
- Record last updated
- Oct 10, 2023
- Fax
- (423) 616-0150
- Medicare enrollment
- Enrolled (PECOS I20200727001608); accepts Medicare assignment
- Medical or professional school
- Loma Linda University School Of Medicine, 1986
- Entity
- Type 1 · individual
8 nearest internal medicine physician records → All 2,596 in Tennessee → Look up another NPI →
Also registered at 2231 Sandstone Dr
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Morgan Anderson, RDRegistered Dietitian1598310955
- Rachel BarnettFamily Nurse Practitioner1346868684
- Jessica Singleton, FNP-BCNurse Practitioner1750857587
Verify Daniel Castro in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersTennessee Board of Medical Examiners
Search for license MD0000056844Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
41% fewer Medicare Part D claims than the average internal medicine physician in 2024
1,880 Medicare Part D claims for 280 beneficiaries, against an average of 3,176 among the 108,855 providers of this specialty who prescribed in Part D. Brand-name drugs were 46% of claims.
Most prescribed
- Jardiance170 claims
- Metformin Hcl Er136 claims
- Tresiba Flextouch U-200107 claims
- Lisinopril90 claims
- Ozempic84 claims
- Atorvastatin Calcium63 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.
Industry payments in 2024: $204.07
10 payments; by number, the most common kind was food and beverage; the largest payer was Dexcom, Inc. The 50,334 providers of this specialty with any payment received $1,303.06 on average. Payments are reported by manufacturers, not by the provider, and are not a sign of wrongdoing.
Source: CMS Open Payments, program year 2024 (openpaymentsdata.cms.gov); average among providers of this specialty with at least one payment.
Bills Medicare through one group practice
- US Diabetes Care And Surgical Specialty OF Morristown TNMorristown, TN
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Daniel Castro among 2,596 internal medicine physician records in Tennessee
Daniel Castro, MD is one of 2,596 internal medicine physician records with a practice address in Tennessee. 80% 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 15% of them.
- NPI issued2006 · 15% of these records are older, 46% newer
- In a Medicare fileYes · 80% of these records are
- In the CMS Doctors and Clinicians fileYes · 66% of these records are
- Graduated1986 · median 2003 among the 1,705 with a school on file
- Record last updated2023 · 56% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 207R00000X and a Tennessee practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
17 internal medicine physician records list a practice address in Morristown
They are 17 of the 1,132 NPPES records with a practice address in Morristown, and 2,596 internal medicine physician records in Tennessee.
All 2,596 in Tennessee → Every provider in Morristown → Internal Medicine Physician nationwide →
The 8 internal medicine physician records with the nearest ZIP codes
- Matthew Allison, M.D.Morristown, TN 378141245680933
- Allison Debusk Rosson, DOMorristown, TN 378141841920535
- David Goldman, MDMorristown, TN 378141518047059
- John Horner, M.D.Morristown, TN 378141760414635
- Christian Lansing, M.D.Morristown, TN 378141568603512
- Orlanda Lowry, M.D.Morristown, TN 378141174571822
- Suresh Nekuri, MDMorristown, TN 378141619978657
- Michael Tan, MDMorristown, TN 378141669499208
Common questions
What is Daniel Castro, MD's NPI number?
Daniel Castro, MD's National Provider Identifier (NPI) is 1821002700, issued on Jul 28, 2006. An NPI identifies a provider in billing; it is not a license.
Where is Daniel Castro, MD located?
The NPPES record lists a practice address at 2231 Sandstone Dr, Morristown, TN, 37814. Phone: (423) 616-0625. Providers update this record themselves, so call before visiting.
How can I verify Daniel Castro, MD's license?
NPPES lists Tennessee license number MD0000056844, as entered by the provider. Search the Tennessee Board of Medical Examiners at https://www.tn.gov/health/licensure/me.html. The NPPES record confirms identity only; the state search shows license status, expiration and public orders.
How much does Daniel Castro, MD prescribe under Medicare Part D?
In 2024, Daniel Castro, MD had 1,880 Medicare Part D claims for 280 beneficiaries; the average among internal medicine physician prescribers was 3,176. 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.