NPPES file of Aug 9, 2026

Rafael Canadas-Zizzias, M.D.

Internal Medicine Physician · Dallas, TX

Rafael Canadas-Zizzias, M.D. is an internal medicine physician with a practice address in Dallas, Texas, and NPI 1801897616, issued on Aug 2, 2005. Check the license (Texas K1382, as entered in NPPES) on the Texas Medical Board; the Medicare figures below come from public CMS files.

Record from CMS NPPES, file of Aug 9, 2026 · Medicare files 2024 · method · Verify with CMS →

NPPES recordNPPES file of Aug 9, 2026
1801897616
Name
Rafael Canadas-Zizzias
Credential
M.D.
Primary taxonomy
Internal Medicine Physician 207R00000X
License number
K1382 TX
Self-reported in NPPES; status is on the state search
Practice location
12201 Merit Dr, Dallas, TX 75251
Phone
(972) 385-9700
Enumerated
Aug 2, 2005
Record last updated
Apr 15, 2014 (not updated in 12 years: call before relying on the address or phone)
Fax
(972) 385-9790
Medicare enrollment
Enrolled (PECOS I20070806000784); accepts Medicare assignment
Telehealth
Offers telehealth (CMS)
Entity
Type 1 · individual
Public record from CMS NPPES (open it on the CMS NPI Registry). Enrollment, assignment, school and telehealth: CMS Doctors and Clinicians file, Aug 2026. A record is not a license: verify it with the state board.
Download card Updates feed

8 nearest internal medicine physician records → All 9,175 in Texas → Look up another NPI →

Also registered at 12201 Merit Dr

A shared address usually means a shared clinic or building; it does not show who employs whom.

  1. Frederick Duffy, M.D.Plastic Surgery Physician1376546101
  2. Michelle Heintges, MDObstetrics & Gynecology Physician1538116694
  3. Frank Kromelis, M.D.Internal Medicine Physician1659419794
  4. Amie Napier, MDObstetrics & Gynecology Physician1093762890
  5. Vincent Young, M.D.Anesthesiology Physician1689658676

Verify Rafael Canadas-Zizzias in five checks

  1. 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
  2. 2LicenseActive license and public ordersTexas Medical Board
    Search for license K1382    Check the board
  3. 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
  4. 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
  5. 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
Open the Texas license search

PlainDoctor does not match the HHS-OIG exclusion list to individual records: most entries carry no NPI. Search the OIG exclusion list by name.

Is this page about you? You can ask us to correct, restrict or remove it: how.

2.7 times the Medicare Part D claims of the average internal medicine physician in 2024

8,517 Medicare Part D claims for 521 beneficiaries, against an average of 3,176 among the 108,855 providers of this specialty who prescribed in Part D. Brand-name drugs were 13% of claims. 134 claims were for opioids.

  1. Rafael Canadas-Zizzias8,517
  2. Specialty average3,176

Most prescribed

  1. Atorvastatin Calcium499 claims
  2. Rosuvastatin Calcium439 claims
  3. Amlodipine Besylate337 claims
  4. Levothyroxine Sodium294 claims
  5. Metformin Hcl266 claims
  6. Pantoprazole Sodium260 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: $310.70

17 payments; by number, the most common kind was food and beverage; the largest payer was Boehringer Ingelheim Pharmaceuticals, 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.

  1. Rafael Canadas-Zizzias$310.70
  2. Specialty average$1,303.06

Source: CMS Open Payments, program year 2024 (openpaymentsdata.cms.gov); average among providers of this specialty with at least one payment.

Rafael Canadas-Zizzias among 9,175 internal medicine physician records in Texas

Rafael Canadas-Zizzias, M.D. is one of 9,175 internal medicine physician records with a practice address in Texas. 82% 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, 91% newer
  • In a Medicare fileYes · 82% of these records are
  • In the CMS Doctors and Clinicians fileYes · 66% of these records are
  • Graduated1990 · median 2004 among the 6,088 with a school on file
  • Record last updated2014 · 49% 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 Texas practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).

956 internal medicine physician records list a practice address in Dallas

They are 956 of the 36,304 NPPES records with a practice address in Dallas, and 9,175 internal medicine physician records in Texas.

All 9,175 in Texas → Every provider in Dallas → Internal Medicine Physician nationwide →

The 8 internal medicine physician records with the nearest ZIP codes

  1. Asma Ashraf, M.D.Dallas, TX 752511063439529
  2. Dipauni Doshi, M.D.Dallas, TX 752511831162874
  3. Laila Hirjee, M.D.Dallas, TX 752511588678437
  4. James Ikemba, MDDallas, TX 752511124055579
  5. Bill Johnson, MDDallas, TX 752511568411205
  6. Zulfiqar Jussa, MDDallas, TX 752511265490544
  7. Hadi Ladak, M.D.Dallas, TX 752511275583973
  8. Cynthia Muller, MDDallas, TX 752511689695561

Common questions

What is Rafael Canadas-Zizzias, M.D.'s NPI number?

Rafael Canadas-Zizzias, M.D.'s National Provider Identifier (NPI) is 1801897616, issued on Aug 2, 2005. An NPI identifies a provider in billing; it is not a license.

Where is Rafael Canadas-Zizzias, M.D. located?

The NPPES record lists a practice address at 12201 Merit Dr, Dallas, TX, 75251. Phone: (972) 385-9700. Providers update this record themselves, so call before visiting.

How can I verify Rafael Canadas-Zizzias, M.D.'s license?

NPPES lists Texas license number K1382, as entered by the provider. Search the Texas Medical Board at https://profile.tmb.state.tx.us/Search.aspx. The NPPES record confirms identity only; the state search shows license status, expiration and public orders.

How much does Rafael Canadas-Zizzias, M.D. prescribe under Medicare Part D?

In 2024, Rafael Canadas-Zizzias, M.D. had 8,517 Medicare Part D claims for 521 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.

Written with AI tools from the named public files; every figure is computed from those files (how it is made).

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.