Javi L. Hartenstine, D.O.
Anatomic Pathology & Clinical Pathology Physician · Pleasanton, CA
Javi L. Hartenstine, D.O. is an anatomic pathology & clinical pathology physician with a practice address in Pleasanton, California, and NPI 1932462413, issued on Jun 20, 2012. Check the license (California 20A14783, as entered in NPPES) on the Medical Board of California; the Medicare figures below come from public CMS files.
- Name
- Javi L. Hartenstine
- Credential
- D.O.
- Primary taxonomy
- Anatomic Pathology & Clinical Pathology Physician 207ZP0102X
- License numbers
- 20A14783 CA
6530 OK
U3407 TX
Self-reported in NPPES; status is on the state search - Practice location
- 5555 W Las Positas Blvd, Pleasanton, CA 94588
- Phone
- (925) 847-3000
- Enumerated
- Jun 20, 2012
- Record last updated
- Jul 6, 2026
- Medicare enrollment
- Enrolled (PECOS I20251119005143); accepts Medicare assignment
- Entity
- Type 1 · individual
8 nearest anatomic pathology & clinical pathology physician records → All 1,554 in California → Look up another NPI →
Also registered at 5555 W Las Positas Blvd
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Dennis Alfaro, M.D.Emergency Medicine Physician1407847718
- Ashley Altman, MDDiagnostic Radiology Physician1649697947
- Joshua AshfordEmergency Registered Nurse1972458941
- Abinav Baweja, MDMedical Oncology Physician1770961575
- Brooke BettsPharmacist1962178491
- Myrna Castelazo, M.D.Diagnostic Radiology Physician1407290513
Verify Javi L. Hartenstine in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMedical Board of California
Search for license 20A14783Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
Bills Medicare through 3 group practices
- Bhs Physicians Network, IncHarlingen, TX
- Diagnostic Pathology Services, Inc.Oklahoma City, OK
- Laboratory Medicine Consultants LtdLas Vegas, NV
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Javi L. Hartenstine among 1,554 anatomic pathology & clinical pathology physician records in California
Javi L. Hartenstine, D.O. is one of 1,554 anatomic pathology & clinical pathology physician records with a practice address in California. 65% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2012, is newer than 73% of them.
- NPI issued2012 · 73% of these records are older, 23% newer
- In a Medicare fileYes · 65% of these records are
- In the CMS Doctors and Clinicians fileYes · 57% of these records are
- Graduated2017 · median 2003 among the 891 with a school on file
- Record last updated2026 · 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 207ZP0102X and a California practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
Anatomic Pathology & Clinical Pathology Physician providers in California
There are 1,554 anatomic pathology & clinical pathology physician records in California.
All 1,554 in California → Every provider in Pleasanton → Anatomic Pathology & Clinical Pathology Physician nationwide →
The 8 anatomic pathology & clinical pathology physician records with the nearest ZIP codes
- Robert Luo, M.D.Pleasanton, CA 945881376730564
- Khaingsoe Win, M.D.Pleasanton, CA 945881336362920
- Ahchean Chen, MDVallejo, CA 945891548202773
- James Krasno, MDVallejo, CA 945891366401549
- Caroline Yap, MDVallejo, CA 945911679580351
- Lynne Finley, M.D.Walnut Creek, CA 945961609963164
- Nicholas Byrne, MDWalnut Creek, CA 945981710191325
- Jeffrey Curtis, MDWalnut Creek, CA 945981215018528
Common questions
What is Javi L. Hartenstine, D.O.'s NPI number?
Javi L. Hartenstine, D.O.'s National Provider Identifier (NPI) is 1932462413, issued on Jun 20, 2012. An NPI identifies a provider in billing; it is not a license.
Where is Javi L. Hartenstine, D.O. located?
The NPPES record lists a practice address at 5555 W Las Positas Blvd, Pleasanton, CA, 94588. Phone: (925) 847-3000. Providers update this record themselves, so call before visiting.
How can I verify Javi L. Hartenstine, D.O.'s license?
NPPES lists California license number 20A14783, 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.
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.