Appl Clin Inform
Dr. Leon Carlos Cruz Castaneda, MD
- Medicare services, 2019
- 37
- Medicare patients, 2024
- 12
- Part D claims, 2024
- 160
- Publications
- 1
- Hospital affiliations
- 1
- Practice address
- 250 Hospital Parkway, San Jose, CA 95119
- Practice phone
- Call (408) 972-7000
- Professional email
- Get professional email
- Personal email
- Get personal email
- Mobile number
- Get mobile number
Primary practice
Find Dr. Castaneda's professional email, personal email and mobile number
Dmand AI checks each channel through healthcare-specific waterfall enrichment. See what is on file with a free account, with practice phones, licenses and affiliations.
Dr. Leon Carlos Cruz Castaneda is an internist in San Jose, California
Dr. Castaneda practices at San Jose Medical Center in San Jose, California, part of Kaiser Permanente.
Dr. Castaneda's NPI, 1942629399, was assigned on April 14, 2014. Dr. Castaneda graduated from Stanford University School Of Medicine in 2014. Dr. Castaneda holds California license A137528.
- NPI
- 1942629399NPI Registry (opens in a new tab)
- Medicare PAC ID
- 2961775069
- NPI enumeration date
- April 14, 2014
- NPI status
- Active
- Accepts Medicare assignment
- Yes
- Practice phone
- (408) 972-7000
- Professional email
- Get email
- Personal email
- Get email
- Mobile number
- Get number
- Sex
- Male
- Estimated age
- 38
- Medical school graduation
- 2014
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; Dmand AI Affiliation Data; and Doctors and Clinicians National Downloadable File (CMS)
Dr. Leon Carlos Cruz Castaneda practices at San Jose Medical Center in San Jose, California
Dr. Castaneda's primary practice is San Jose Medical Center, at 250 Hospital Parkway, San Jose, CA 95119 in Santa Clara County. The practice phone is (408) 972-7000.
- San Jose Medical Center250 Hospital Parkway, San Jose, CA 95119 · Santa Clara CountyPhone(408) 972-7000
Source: Dmand AI Affiliation Data
Dr. Leon Carlos Cruz Castaneda is affiliated with 1 site of care and 1 medical group
Dr. Castaneda's primary practice is San Jose Medical Center in San Jose, California, part of Kaiser Permanente. The medical group on file is The Permanente Medical Group, Inc.
Sources: Dmand AI Affiliation Data; and Dmand AI Org Hierarchy Data
Dmand AI tracks the EHR system at Dr. Leon Carlos Cruz Castaneda's practice
Dmand AI tracks the electronic health record (EHR) system at each site where Dr. Castaneda practices. Vendor and product names are available with a free account.
| Site | EHR vendor and product |
|---|---|
| San Jose Medical Center | Available with a free account |
Source: Dmand AI Technology Install Data
For health IT teams
Dmand AI maps EHR vendors, IT decision makers and buying committees across Kaiser Permanente and 6.2K+ hospitals, with verified contacts in the same login.
Dr. Leon Carlos Cruz Castaneda is one of 16,751 internists in California
Internal medicine is Dr. Castaneda's primary specialty in the NPI Registry, under taxonomy code 207R00000X. Dr. Castaneda is board certified in internal medicine by the American Board of Internal Medicine. Dr. Castaneda is licensed in California.
Specialties and state licenses
- Internal medicine, CaliforniaPrimary
Clinical focus
Dmand AI lists lung disease: COPD, asthma or bronchitis among the conditions Dr. Castaneda treats.
Internists near Dr. Castaneda
Counts of internists with a Dmand AI profile, by place and practice. Each opens the list.
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; and Dmand AI Peer Benchmarks
Dr. Leon Carlos Cruz Castaneda billed Medicare for 37 services in 2019
CMS data shows 37 Medicare services from Dr. Castaneda across 1 procedure code in 2019, for 12 Medicare patients. Medicare paid $2,407 for them. Every service was in a facility, such as a hospital, rather than an office.
Dr. Castaneda's Medicare services by type, 2018 to 2019
- 2018
- 2019
- Office and hospital visits
- 2018: 452019: 3718%
Dr. Castaneda compared with the California median for internists, 2019
- Dr. Castaneda
- California median
- Medicare services
- 37vs 36190% below
- Medicare patients
- 12vs 15192% below
- Part D claims
- 18vs 42196% below
Medians across 15,815 internists in California with Dmand AI profiles that report each measure.
Dr. Castaneda's most billed Medicare procedure codes, 2019
CMS publishes codes billed for 11 or more Medicare patients. Each label is the code family; CPT descriptions are licensed by the AMA.
Need commercial claims for Dr. Castaneda?
Medicare shows one payer. Book a meeting to get commercial claims data for Dr. Castaneda and other internists in California.
Sources: Medicare Physician & Other Practitioners - by Provider and Service (CMS), 2024 data; and Dmand AI Peer Benchmarks
Dr. Leon Carlos Cruz Castaneda treated 12 Medicare patients in 2024, average age 72
CMS counts 12 Medicare patients who saw Dr. Castaneda in 2024. The largest group is 75 to 84, with 0 patients. 75% of them have high blood pressure. Their average risk score is 3.24, where 1.00 is the Medicare average, so they are sicker than most Medicare patients.
Across all payers, Dmand AI patient panel data puts Dr. Castaneda's median patient age at 72, with 48% women.
Dr. Castaneda's Medicare patients by age, 2024
CMS leaves out age groups with fewer than 11 patients.
Chronic conditions among Dr. Castaneda's Medicare patients, 2024
- High blood pressure75%
Share of Medicare patients with each condition. A patient can have several.
Dr. Castaneda's patients across all payers
Dmand AI patient panel data covers Medicare, Medicaid and commercial patients.
Patient panel by age, all payers
Median age 72
Patient panel by sex, all payers
- Women48%
- Men51%
Sources: Dmand AI Patient Panel Data; and Medicare Physician & Other Practitioners - by Provider (CMS), 2024 data
Dr. Leon Carlos Cruz Castaneda wrote 160 Medicare Part D claims in 2024
In 2024, Dr. Castaneda wrote 160 Medicare Part D claims for 68 patients. 91% of them were for generic drugs. CMS names the drug for 18 of them, across 1 drug with 11 or more claims each, at $216 in total drug cost. In 2023, CMS named 18 claims across 1 drug.
Dr. Castaneda's Part D claims by kind of drug, 2024
- Generic146 claims91%
- Brand-name14 claims9%
Dr. Castaneda's most prescribed drugs by claims, 2024
CMS names a drug when it has 11 or more claims. Share is of the claims for drugs CMS names.
Drug classes CMS tracks in Dr. Castaneda's Part D claims, 2024
- Antibiotics13%21 of 160 claims
Share of all Part D claims for each drug class CMS reports on. Classes with no claims are left out.
Part D claims for drugs CMS names, 2023 to 2024
- 2023
- 2024
- Claims for drugs CMS names
- 2023: 182024: 18No change
Drugs named by CMS: 1 in 2024, 1 in 2023.
Sources: Medicare Part D Prescribers - by Provider and Drug (CMS), 2024 data, released May 6, 2026; and Medicare Part D Prescribers - by Provider (CMS), 2024 data
How Dr. Leon Carlos Cruz Castaneda takes part in Medicare
Dr. Castaneda accepts Medicare assignment, so Medicare's approved amount is taken as full payment.
- Accepts Medicare assignment
- Yes
Source: Doctors and Clinicians National Downloadable File (CMS)
For MedTech and pharma teams
Filter 7.4M+ HCPs by Medicare procedures, Part D drugs and Open Payments history, then reach them with verified contacts in one login.
Dr. Leon Carlos Cruz Castaneda has 1 publication on record
Dmand AI links 1 paper to Dr. Castaneda in 2016. Dr. Castaneda's most frequent co-authors are Joshua Alexander Rolnick and Lisa Shieh, MD.
Dr. Castaneda's most frequent co-authors
Recent publications by Dr. Castaneda
See who Dr. Castaneda researches with
Physician Network Discovery turns co-authorship, shared hospitals and shared groups into a map of who Dr. Castaneda works with, so you can find a warm path to the right internists.
Sources: PubMed (National Library of Medicine); and Dmand AI Research Linkage
Dr. Leon Carlos Cruz Castaneda graduated from Stanford University School Of Medicine
Dr. Castaneda graduated from Stanford University School Of Medicine in 2014.
- Medical school
- Board certified in internal medicine
Source: Dmand AI Professional Profile Data
Dr. Leon Carlos Cruz Castaneda accepts plans from 2 insurance carriers
Dr. Castaneda is in network with 2 carriers, including Kaiser Permanente and CMS Medicare. EPO plans come from the most carriers, 1. Check the plan with the practice before a visit.
- Kaiser Permanente
- CMS Medicare
Plan types Dr. Castaneda accepts, by number of carriers
- EPO1
- HMO1
- Medicare1
- POS1
Source: Dmand AI Insurance Network Data
Sources for Dr. Leon Carlos Cruz Castaneda's profile data
| Data on this page | Source |
|---|---|
| NPI, name, sex, specialty and licenses | NPPES NPI Registry (CMS) (opens in a new tab)Dmand AI Professional Profile Data |
| Practice locations and phone | Dmand AI Affiliation Data |
| Primary practice, affiliations and health system | Dmand AI Affiliation DataDmand AI Org Hierarchy Data |
| Medicare services and procedure codes | Medicare Physician & Other Practitioners - by Provider and Service (CMS) (opens in a new tab) |
| State medians for the same specialty | Dmand AI Peer Benchmarks |
| Medicare patients and the all-payer patient panel | Dmand AI Patient Panel DataMedicare Physician & Other Practitioners - by Provider (CMS) (opens in a new tab) |
| Part D prescribing | Medicare Part D Prescribers - by Provider and Drug (CMS) (opens in a new tab)Medicare Part D Prescribers - by Provider (CMS) (opens in a new tab) |
| MIPS scores, telehealth, assignment and procedure percentiles | Doctors and Clinicians National Downloadable File (CMS) (opens in a new tab) |
| Publications, topics and co-authors | PubMed (National Library of Medicine) (opens in a new tab)Dmand AI Research Linkage |
| Training, board certification and memberships | Dmand AI Professional Profile Data |
| Insurance carriers and plan types | Dmand AI Insurance Network Data |
| EHR at each practice site | Dmand AI Technology Install Data |
| Similar physicians | Dmand AI Affiliation Data |
Data last refreshed October 2026Report an inaccuracyRemove my information
FAQ
Frequently asked questions about Dr. Leon Carlos Cruz Castaneda
Spotted something out of date? Email hello@dmand.ai and we will check the record. Contact details live in the free trial.
What is Dr. Leon Carlos Cruz Castaneda's NPI number?
Dr. Leon Carlos Cruz Castaneda's NPI number is 1942629399. It was assigned on April 14, 2014, and it is active in the NPI Registry.
What kind of doctor is Dr. Leon Carlos Cruz Castaneda?
Dr. Leon Carlos Cruz Castaneda is an internist in San Jose, California. The primary specialty in the NPI Registry is Internal Medicine Physician (taxonomy code 207R00000X).
Where does Dr. Leon Carlos Cruz Castaneda practice?
Dr. Castaneda practices at 250 Hospital Parkway, San Jose, CA 95119. Dr. Castaneda's primary practice is San Jose Medical Center in San Jose, California, part of Kaiser Permanente.
What is Dr. Leon Carlos Cruz Castaneda's office phone number?
The practice phone on file for Dr. Castaneda is (408) 972-7000.
What is Dr. Leon Carlos Cruz Castaneda's medical license number?
Dr. Castaneda holds California license A137528.
Which hospitals is Dr. Leon Carlos Cruz Castaneda affiliated with?
Dr. Castaneda practices at San Jose Medical Center in San Jose, California.
What medical group is Dr. Leon Carlos Cruz Castaneda part of?
Dr. Castaneda is linked to The Permanente Medical Group, Inc.
Does Dr. Leon Carlos Cruz Castaneda accept Medicare?
Yes. CMS data shows Dr. Castaneda billed Medicare for 37 services in 2019, and Dr. Castaneda accepts Medicare assignment.
How many Medicare patients does Dr. Leon Carlos Cruz Castaneda see?
CMS counts 12 Medicare patients who saw Dr. Castaneda in 2024, with an average age of 72.
Is Dr. Leon Carlos Cruz Castaneda board certified?
Yes. Dr. Castaneda is board certified in internal medicine by the American Board of Internal Medicine.
Show 7 more questionsShow fewer questions
What services does Dr. Leon Carlos Cruz Castaneda bill to Medicare?
In 2019, Dr. Castaneda's most billed Medicare services were hospital inpatient care (99232).
Where did Dr. Leon Carlos Cruz Castaneda go to medical school?
Dr. Castaneda graduated from Stanford University School Of Medicine in 2014.
What drugs does Dr. Leon Carlos Cruz Castaneda prescribe most?
In 2024 Medicare Part D data, Dr. Castaneda's most prescribed drugs by claims were Furosemide.
How long has Dr. Leon Carlos Cruz Castaneda been practicing?
Dr. Castaneda graduated from medical school in 2014, 12 years ago.
Does Dr. Leon Carlos Cruz Castaneda do research?
Dmand AI links 1 publication to Dr. Castaneda.
Who does Dr. Leon Carlos Cruz Castaneda publish with?
Dr. Castaneda's most frequent co-authors are Joshua Alexander Rolnick (1 shared paper) and Lisa Shieh, MD (1 shared paper).
What insurance does Dr. Leon Carlos Cruz Castaneda accept?
Dr. Castaneda is in network with 2 carriers, including Kaiser Permanente and CMS Medicare. EPO plans come from the most carriers, 1. Check the plan with the practice before a visit.
Selling to internal medicine practices?
See internists in California by site of care and group
Find the practices, groups and hospitals they work with, and the right people to contact at each.
- 30 days free
- Self-serve
- No credit card