Cesar Abraham Santillana, MD
Internal Medicine Physician · Tucson, AZ
Cesar Abraham Santillana, MD is an internal medicine physician with a practice address in Tucson, Arizona, and NPI 1063974889, issued on Apr 1, 2019. Check the license on the Arizona Medical Board; the Medicare figures below come from public CMS files.
- Name
- Cesar Abraham Santillana
- Credential
- MD
- Primary taxonomy
- Internal Medicine Physician 207R00000X
- License numbers
- ME153137 FL
036162486 IL
339579 LA
MD2022-1447 NM
Self-reported in NPPES; status is on the state search - Practice location
- 1601 W Saint Marys RD, Tucson, AZ 85745
- Phone
- (520) 622-5833
- Enumerated
- Apr 1, 2019
- Record last updated
- Apr 30, 2025
- Medicare enrollment
- Enrolled (PECOS I20250424002397); accepts Medicare assignment
- Entity
- Type 1 · individual
8 nearest internal medicine physician records → All 2,853 in Arizona → Look up another NPI →
Also registered at 1601 W Saint Marys RD
A shared address usually means a shared clinic or building; it does not show who employs whom.
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- Andrew Aubuchon, P.T.Physical Therapist1831342047
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Verify Cesar Abraham Santillana in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersArizona Medical BoardCheck the board
- 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
82% fewer Medicare Part D claims than the average internal medicine physician in 2024
570 Medicare Part D claims for 118 beneficiaries, against an average of 3,176 among the 108,855 providers of this specialty who prescribed in Part D. Brand-name drugs were 10% of claims.
Most prescribed
- Pantoprazole Sodium37 claims
- Atorvastatin Calcium29 claims
- Losartan Potassium25 claims
- Famotidine23 claims
- Levetiracetam23 claims
- Carvedilol21 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.
7 hospitals and group practices
- Houlton Regional HospitalHoulton, ME · Critical Access Hospitals3 of 5 stars
- Apogee Medical Group IncKingman, AZ
- Baptist Health Medical Group IncElizabethtown, KY
- County OF Santa ClaraSan Jose, CA
- Fairview Heights Medical Group SCBelleville, IL
- Mcleod Regional Medical Center OF The Pee Dee IncFlorence, SC
- Quantum Bay Area Hospitalist Medical Group IncSan Jose, CA
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through); hospitals matched to CMS Hospital General Information (Care Compare) (data.cms.gov). Star ratings are CMS hospital ratings, not ratings of this provider.
Cesar Abraham Santillana among 2,853 internal medicine physician records in Arizona
Cesar Abraham Santillana, MD is one of 2,853 internal medicine physician records with a practice address in Arizona. 75% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2019, is newer than 79% of them.
- NPI issued2019 · 79% of these records are older, 19% newer
- In a Medicare fileYes · 75% of these records are
- In the CMS Doctors and Clinicians fileYes · 58% of these records are
- Graduated2018 · median 2003 among the 1,643 with a school on file
- Record last updated2025 · 51% 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 Arizona practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
651 internal medicine physician records list a practice address in Tucson
They are 651 of the 18,788 NPPES records with a practice address in Tucson, and 2,853 internal medicine physician records in Arizona.
All 2,853 in Arizona → Every provider in Tucson → Internal Medicine Physician nationwide →
The 8 internal medicine physician records with the nearest ZIP codes
- James Belitsos, MDTucson, AZ 857451942217914
- Gonzalo Celis, M.D.Tucson, AZ 857451366425886
- Rebecca Dawson, MDTucson, AZ 857451114066131
- Nicola Finley, MDTucson, AZ 857451003898180
- Armando Gonzalez, MDTucson, AZ 857451003827692
- Gabrielle Ochoa, MDTucson, AZ 857451023096674
- Stanley Ofori, MDTucson, AZ 857451093793648
- Maria Pina, MDTucson, AZ 857451518934074
Common questions
What is Cesar Abraham Santillana, MD's NPI number?
Cesar Abraham Santillana, MD's National Provider Identifier (NPI) is 1063974889, issued on Apr 1, 2019. An NPI identifies a provider in billing; it is not a license.
Where is Cesar Abraham Santillana, MD located?
The NPPES record lists a practice address at 1601 W Saint Marys RD, Tucson, AZ, 85745. Phone: (520) 622-5833. Providers update this record themselves, so call before visiting.
How can I verify Cesar Abraham Santillana, MD's license?
Search the Arizona Medical Board at https://www.azmd.gov/. The NPPES record confirms identity only; the state search shows license status, expiration and public orders.
How much does Cesar Abraham Santillana, MD prescribe under Medicare Part D?
In 2024, Cesar Abraham Santillana, MD had 570 Medicare Part D claims for 118 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.