Steven M. Tilles, MD
Nephrology Physician · San Jose, CA
Steven M. Tilles, MD is a nephrology physician with a practice address in San Jose, California, and NPI 1841292745, issued on Aug 11, 2005. Check the license (California G40389, as entered in NPPES) on the Medical Board of California; the Medicare figures below come from public CMS files.
- Name
- Steven M. Tilles
- Credential
- MD
- Primary taxonomy
- Nephrology Physician 207RN0300X
- License number
- G40389 CA
Self-reported in NPPES; status is on the state search - Practice location
- 2505 Samaritan Dr, San Jose, CA 95124
- Phone
- (408) 356-8133
- Enumerated
- Aug 11, 2005
- Record last updated
- Nov 11, 2010 (not updated in 16 years: call before relying on the address or phone)
- Fax
- (408) 356-6923
- Medicaid ID
- 00G403890 CA
- Medicare enrollment
- Enrolled (PECOS I20120419000179); accepts Medicare assignment
- Medical or professional school
- University Of California, Geffen School Of Medicine, 1978
- Entity
- Type 1 · individual
8 nearest nephrology physician records → All 1,468 in California → Look up another NPI →
Also registered at 2505 Samaritan Dr
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Matthew Bloom, M.D.Surgical Critical Care Physician1477631844
- Jacqueline Chak, M.D.Pediatrics Physician1558684647
- Carole Cook, M.D.Gynecology Physician1710003850
- Mark Eastham, M.D.Specialist1881610376
- Lauren Farash, M.D., M.P.H.Pediatrics Physician1215170147
- Ernesto Gonzalez, M.D.Neonatal-Perinatal Medicine Physician1689937344
Verify Steven M. Tilles in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMedical Board of California
Search for license G40389Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
3.2 times the Medicare Part D claims of the average nephrology physician in 2024
4,743 Medicare Part D claims for 400 beneficiaries, against an average of 1,465 among the 10,986 providers of this specialty who prescribed in Part D. Brand-name drugs were 15% of claims. 84 claims were for opioids.
Most prescribed
- Atorvastatin Calcium270 claims
- Amlodipine Besylate216 claims
- Losartan Potassium203 claims
- Furosemide151 claims
- Levothyroxine Sodium137 claims
- Alprazolam102 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.
The practice group's MIPS final score for 2023 (Medicare payment program): 58.4 of 100
The Merit-based Incentive Payment System score is reported for the practice group, not for one clinician alone. Four categories are weighted into the final score; the average among 454,083 clinicians with a measured score was 83.5.
Source: CMS Quality Payment Program, MIPS performance year 2023, group reporting; category weights for 2023 (qpp.cms.gov).
Industry payments in 2024: $396.72
11 payments; by number, the most common kind was food and beverage; the largest payer was Otsuka America Pharmaceutical, Inc. The 8,230 providers of this specialty with any payment received $3,091.37 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.
Steven M. Tilles among 1,468 nephrology physician records in California
Steven M. Tilles, MD is one of 1,468 nephrology physician records with a practice address in California. 88% 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, 90% newer
- In a Medicare fileYes · 88% of these records are
- In the CMS Doctors and Clinicians fileYes · 77% of these records are
- Graduated1978 · median 2001 among the 1,128 with a school on file
- Record last updated2010 · 62% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 207RN0300X and a California practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
Nephrology Physician providers in California
There are 1,468 nephrology physician records in California.
All 1,468 in California → Every provider in San Jose → Nephrology Physician nationwide →
The 8 nephrology physician records with the nearest ZIP codes
- Archana Dhawan, M.D.San Jose, CA 951241649294273
- Khoi Hoang, MDSan Jose, CA 951241821099359
- Tarla Joshi, MDSan Jose, CA 951241669474458
- Jan Winetz, MDSan Jose, CA 951241790777852
- Alexander Doan, MDSan Jose, CA 951281003859661
- Lewis Haut, MDSan Jose, CA 951281760490510
- June Lugovoy, MDSan Jose, CA 951281508822248
- Nicholas MonacoSan Jose, CA 951281457404816
Common questions
What is Steven M. Tilles, MD's NPI number?
Steven M. Tilles, MD's National Provider Identifier (NPI) is 1841292745, issued on Aug 11, 2005. An NPI identifies a provider in billing; it is not a license.
Where is Steven M. Tilles, MD located?
The NPPES record lists a practice address at 2505 Samaritan Dr, San Jose, CA, 95124. Phone: (408) 356-8133. Providers update this record themselves, so call before visiting.
How can I verify Steven M. Tilles, MD's license?
NPPES lists California license number G40389, as entered by the provider. Search the Medical Board of California at https://www.mbc.ca.gov/License-Verification/default.aspx. The NPPES record confirms identity only; the state search shows license status, expiration and public orders.
How much does Steven M. Tilles, MD prescribe under Medicare Part D?
In 2024, Steven M. Tilles, MD had 4,743 Medicare Part D claims for 400 beneficiaries; the average among nephrology physician prescribers was 1,465. Part D covers Medicare prescriptions only.
What is Steven M. Tilles, MD's MIPS final score?
The 2023 MIPS final score is 58.4 of 100, reported for the practice group. The average among 454,083 clinicians with a measured score was 83.5.
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.