Daniel Combitsis, DO
Internal Medicine Physician · Livermore, CA
Daniel Combitsis, DO is an internal medicine physician with a practice address in Livermore, California, and NPI 1942346549, issued on Jan 30, 2007. Check the license (California 20A8071, as entered in NPPES) on the Medical Board of California; the Medicare figures below come from public CMS files.
- Name
- Daniel Combitsis
- Credential
- DO
- Primary taxonomy
- Internal Medicine Physician 207R00000X
- License number
- 20A8071 CA
Self-reported in NPPES; status is on the state search - Practice location
- 3000 Las Positas RD, Livermore, CA 94551
- Phone
- (925) 243-2600
- Enumerated
- Jan 30, 2007
- Record last updated
- Jan 6, 2022
- Medicaid ID
- 00AX80710 CA
- Medicare enrollment
- Enrolled (PECOS I20040408000160); accepts Medicare assignment
- Entity
- Type 1 · individual
8 nearest internal medicine physician records → All 17,696 in California → Look up another NPI →
Also registered at 3000 Las Positas RD
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Chandran Arulanandan, MDInternal Medicine Physician1689752784
- Ian Bartos, MDPediatrics Physician1841372836
- Kimberly Becker, LCSWClinical Social Worker1689216707
- Jason Belk, PHARM.D.Pharmacist1609309723
- Aditi Bommireddy, MDObstetrics & Gynecology Physician1205398609
- Patrick Cahill, PTPhysical Therapist1497822803
Verify Daniel Combitsis in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMedical Board of California
Search for license 20A8071Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
2.5 times the Medicare Part D claims of the average internal medicine physician in 2024
7,970 Medicare Part D claims for 686 beneficiaries, against an average of 3,176 among the 108,855 providers of this specialty who prescribed in Part D. Brand-name drugs were 8% of claims. 599 claims were for opioids.
Most prescribed
- Atorvastatin Calcium375 claims
- Levothyroxine Sodium282 claims
- Hydrocodone-Acetaminophen268 claims
- Amlodipine Besylate241 claims
- Rosuvastatin Calcium232 claims
- Lisinopril194 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.
Bills Medicare through one group practice
- Permanente Medical Group IncRichmond, CA
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Daniel Combitsis among 17,696 internal medicine physician records in California
Daniel Combitsis, DO is one of 17,696 internal medicine physician records with a practice address in California. 79% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2007, is newer than 44% of them.
- NPI issued2007 · 44% of these records are older, 44% newer
- In a Medicare fileYes · 79% of these records are
- In the CMS Doctors and Clinicians fileYes · 63% of these records are
- Graduated2000 · median 2004 among the 11,065 with a school on file
- Record last updated2022 · 61% 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 California practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
25 internal medicine physician records list a practice address in Livermore
They are 25 of the 994 NPPES records with a practice address in Livermore, and 17,696 internal medicine physician records in California.
All 17,696 in California → Every provider in Livermore → Internal Medicine Physician nationwide →
The 8 internal medicine physician records with the nearest ZIP codes
- Chandran Arulanandan, MDLivermore, CA 945511689752784
- Timoteo Canio, MDLivermore, CA 945511164594974
- Yan Dai, MDLivermore, CA 945511740368836
- Babita Dhapola, MDLivermore, CA 945511396811873
- Vandana Jain, MDLivermore, CA 945511134271109
- Mehvish Mahmood, M.D.Livermore, CA 945511609217314
- Sheri Morris, MDLivermore, CA 945511588742647
- Andy Nguyen, MDLivermore, CA 945511659450310
Common questions
What is Daniel Combitsis, DO's NPI number?
Daniel Combitsis, DO's National Provider Identifier (NPI) is 1942346549, issued on Jan 30, 2007. An NPI identifies a provider in billing; it is not a license.
Where is Daniel Combitsis, DO located?
The NPPES record lists a practice address at 3000 Las Positas RD, Livermore, CA, 94551. Phone: (925) 243-2600. Providers update this record themselves, so call before visiting.
How can I verify Daniel Combitsis, DO's license?
NPPES lists California license number 20A8071, 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 Daniel Combitsis, DO prescribe under Medicare Part D?
In 2024, Daniel Combitsis, DO had 7,970 Medicare Part D claims for 686 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.