Recently Updated NPI Information — some details in this NPI profile have been updated in the NPI registry within the last 60 days.

DR. JAVI L HARTENSTINE D.O.
NPI 1932462413
Pathology - Anatomic Pathology & Clinical Pathology in Pleasanton, CA

Q: What is Javi Hartenstine's NPI number?

The NPI number for Javi Hartenstine is 1932462413. It was assigned to this individual provider in the NPPES registry on June 20, 2012.

Q: What is Javi Hartenstine's specialty?

The primary specialty registered for this NPI is Pathology, specializing in Anatomic Pathology & Clinical Pathology, with taxonomy code 207ZP0102X.

Q: When was this NPI record last updated?

The NPPES record for Javi Hartenstine was last updated on July 6, 2026. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 34 days ago. If this record has changed at CMS more recently, you can request an on-demand re-check against the live CMS registry, directly from this page.

Active since June 20, 2012PECOS EnrolledAccepts Medicare Assignment

5555 W LAS POSITAS BLVD, PLEASANTON, CA 94588(925) 847-3000 Get Directions Write a Review

NPPES record last updated: July 6, 2026. Verified against the NPPES registry weekly; last sync: August 02, 2026.

Record update history: Jul 6, 2026, Apr 15, 2026, Jul 8, 2020 and 1 more (4 updates tracked since 2019).

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About Dr. Javi L Hartenstine D.o. NPPES

Official registry information on file with the National Plan and Provider Enumeration System.

DR. JAVI L HARTENSTINE D.O. (NPI 1932462413) is an individual anatomic pathology & clinical pathology provider in Pleasanton, California, licensed in Oklahoma (6530) and active in the NPI registry since June 2012. She is enrolled in Medicare PECOS, is affiliated with Valley Hospital Medical Center, and maintains 4 additional practice locations.

NPPES Registry Identity

NPI1932462413

Entity TypeIndividualFemale

Primary Taxonomy207ZP0102X

Provider Legal NameDR. JAVI L HARTENSTINECredential: D.O.

Location Address5555 W LAS POSITAS BLVDPleasanton, CA 94588-4000

Mailing Address5555 W Las Positas BlvdPleasanton, CA 94588-4000 · (925) 847-3000

Phone(925) 847-3000

Sole ProprietorNo

Medical School CMSOtherGraduated 2017

Enumeration DateJune 20, 2012

Last NPPES UpdateJuly 6, 20264 updates tracked since enumeration

NPPES CertifiedJuly 6, 2026

✔ NPI 1932462413 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses 2

★ Primary SpecialtyPathology · Anatomic Pathology & Clinical PathologyAllopathic & Osteopathic Physicians

Taxonomy Code207ZP0102X

Licenses✔ Licensed in OK · 6530✔ Licensed in TX · U3407✔ Licensed in CA · 20A14783

Definition

A pathologist deals with the causes and nature of disease and contributes to diagnosis, prognosis and treatment through knowledge gained by the laboratory application of the biologic, chemical and physical sciences. A pathologist uses information gathered from the microscopic examination of tissue specimens, cells and body fluids, and from clinical laboratory tests on body fluids and secretions for the diagnosis, exclusion and monitoring of disease.

Also ListedStudent in an Organized Health Care Education/Training ProgramTaxonomy 390200000X

5555 W LAS POSITAS BLVD, Pleasanton, CA 94588

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Secondary Practice Locations 4

Location 11800 N California StStockton, CA 95204-6019 · Phone (209) 943-2000

Location 222 S Greene St, NBW43Baltimore, MD 21201-1544 · Phone (410) 328-5525 · Fax (410) 328-5508

Location 34401 S Western AveOklahoma City, OK 73109-3413 · Phone (405) 636-7251 · Fax (405) 842-3146

Location 44301 Northstar WayModesto, CA 95356 · Phone (209) 577-1200 · Fax (209) 577-6517

Accepted Insurance

The full list of accepted plans is on the Insurance tab. Issuers include Blue Cross and Blue Shield of Texas.Insurance ›

Medicare Participation & PECOS CMS

Medicare enrollment, assignment, and ordering and referring status from the CMS PECOS system.

Medicare Enrollment Status

✔

Enrolled in Medicare and accepts Medicare assignment

Dr. Javi L Hartenstine D.o. is registered in PECOS and agrees to accept the Medicare-approved amount as full payment. Medicare patients are not billed beyond the standard deductible and coinsurance.

PECOS PAC ID9335424738

PECOS Enrollment IDI20220311002154, I20251119005143, I20260421003652

Eligible to Order & Refer✔ Part B Labs & Imaging✔ Durable Medical Equipment✔ Home Health Agency✔ Power Mobility DevicesPer the CMS Ordering and Referring file. Eligibility means Medicare pays claims that this provider orders or refers for these categories.

Areas of Expertise CMS Part B claims 12

Services this provider delivered to Medicare fee-for-service patients, from the CMS Medicare utilization data. Higher counts generally reflect more experience with a service; care delivered outside Medicare is not included.

Pathology examination of tissue using a microscope, intermediate complexity 88305

A pathology examination of tissue with intermediate complexity involves studying a small sample of your body tissue under a microscope. This helps in identifying any abnormal cells or signs of disease. It's a detailed process requiring expert analysis to ensure accurate results.

275 services166 patients

Special stained specimen slides to examine tissue, each additional procedure 88341

Special stained specimen slides are used to analyze tissue in detail. In this process, extra procedures may be needed for a more thorough examination. These involve applying special stains to the tissue on slides, enhancing specific elements for closer study.

114 services33 patients

Pathology examination of tissue using a microscope, moderately high complexity 88307

A pathology examination of tissue with moderate complexity involves a detailed study of a small tissue sample from your body. Using a microscope, experts analyze the tissue's structure and cells to identify any abnormalities. This helps in diagnosing various health conditions accurately.

85 services55 patients

Cell examination of specimen, concentration technique 88108

Cell examination of a specimen using a concentration technique is a lab process that enhances the detection of cells in a sample. This method helps to focus on key areas of the sample, making it easier to spot abnormalities or changes. It's a crucial part of diagnosing and monitoring certain health conditions.

68 services59 patients

Special stained specimen slides to examine tissue, initial procedure 88342

This procedure involves the use of specially stained slides to examine tissue samples. The initial process involves obtaining a small tissue sample from your body. This sample is then placed on a slide and stained with special dyes to highlight different structures and elements. The stained slide is then examined under a microscope to help diagnose any potential health issues.

52 services38 patients

Evaluation of fine needle aspirate with interpretation and report 88173

This procedure involves using a thin needle to collect a small sample from an abnormal area or lump. The sample is then examined under a microscope to identify any potential issues. A report of the findings is provided for further analysis.

34 services21 patients

Pathology examination of specimen during surgery, first tissue block 88331

A pathology examination during surgery involves the immediate analysis of a removed tissue sample. This helps the surgeon make decisions during your operation. The "first tissue block" refers to the initial sample examined. It's a vital step to ensure your health.

22 services15 patients

Pathology examination of tissue using a microscope, moderately low complexity 88304

A pathology examination of tissue, moderately low complexity, involves studying a small sample of your body tissue under a microscope. It helps to identify any abnormal cells or diseases. It's a routine procedure, not complex, and provides crucial insights for your diagnosis.

18 services18 patients

Pathology examination of tissue using a microscope, high complexity 88309

A high complexity pathology examination involves studying body tissue under a microscope to identify any abnormalities. This intricate process helps in diagnosing various conditions and deciding on the best treatment plan.

15 services13 patients

Pathology examination of specimen during surgery 88329

A pathology examination during surgery involves taking a small sample of tissue for testing while the operation is ongoing. This helps the surgeon make immediate decisions about your treatment. The sample is examined under a microscope by a pathologist to identify any abnormal cells or conditions.

14 services13 patients

Cell examination of specimen, selective cellular enhancement technique 88112

Cell examination of a specimen using selective cellular enhancement technique is a lab process that improves the visibility of certain cells in a sample. It helps in identifying abnormalities or diseases. The process is non-invasive, safe, and aids in accurate diagnosis.

13 services11 patients

Preparation of tissue for examination by removing any calcium present 88311

This procedure involves treating tissue samples to remove any calcium, which can interfere with the examination. The tissue is soaked in a special solution that safely dissolves the calcium, leaving the tissue intact for accurate analysis. This helps in making precise diagnoses.

12 services11 patients

Hospital Affiliations CMS Care Compare 4

Hospitals where this provider delivers care, identified from recent Medicare claims and place-of-service records.

Valley Hospital Medical Center

Acute Care Hospitals · Las Vegas, NV

2/5 CMS rating

OwnershipProprietary

CMS Certification Number290021

Location620 Shadow LaneLas Vegas, NV 89106 · Clark County

Emergency services

Centennial Hills Hospital Medical Center

Acute Care Hospitals · Las Vegas, NV

1/5 CMS rating

OwnershipProprietary

CMS Certification Number290054

Location6900 N Durango DrLas Vegas, NV 89149 · Clark County

Emergency services Birthing friendly

Integris Baptist Medical Center, Inc

Acute Care Hospitals · Oklahoma City, OK

2/5 CMS rating

OwnershipVoluntary non-profit - Private

CMS Certification Number370028

Location3300 Northwest ExpresswayOklahoma City, OK 73112 · Oklahoma County

Emergency services Birthing friendly

Vhs Harlingen Hospital Company LLC

Acute Care Hospitals · Harlingen, TX

2/5 CMS rating

OwnershipProprietary

CMS Certification Number450033

Location2101 Pease StHarlingen, TX 78550 · Cameron County

Emergency services Birthing friendly

Physician Visit Costs CMS claims · ZIP area

Typical Medicare office-visit costs in the 94588 ZIP code area, from fee-for-service claims. These are area statistics, not this provider’s prices; actual charges vary by service and coverage.

New Patient

$153.83 typical visit price

range $69.00 – $202.35

Typical copayment $38.45 (range $17.25 – $50.58)

Most-billed visit code 99204

Established Patient

$119.48 typical visit price

range $23.44 – $166.46

Typical copayment $29.87 (range $5.86 – $41.61)

Most-billed visit code 99214

Amounts reflect what Medicare beneficiaries in this ZIP area are typically charged for office visits. Patients with other coverage should check their individual plans.

Other Providers at the Same Location NPPES 20

Providers registered at the same practice address, or within the immediate area, according to the NPPES registry.

DESMOND CHEE

Physician Assistant