DR. JANA TOMSKY M.D.
NPI 1346308798
Family Medicine in Clayton, CA

Q: What is Jana Tomsky's NPI number?

The NPI number for Jana Tomsky is 1346308798. It was assigned to this individual provider in the NPPES registry on December 5, 2006.

Q: What is Jana Tomsky's specialty?

The primary specialty registered for this NPI is Family Medicine with taxonomy code 207Q00000X.

Q: When was this NPI record last updated?

The NPPES record for Jana Tomsky was last updated on March 27, 2018. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 8 years 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 December 05, 2006PECOS Enrolled

5439 CLAYTON RD STE B, CLAYTON, CA 94517(925) 672-6744 Get Directions Write a Review

NPPES record last updated: March 27, 2018. Verified against the NPPES registry weekly; last sync: November 01, 2026.

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About Dr. Jana Tomsky M.d. NPPES

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

DR. JANA TOMSKY M.D. (NPI 1346308798) is an individual family medicine provider in Clayton, California, licensed in California (A84411) and active in the NPI registry since December 2006. She is enrolled in Medicare PECOS.

NPPES Registry Identity

NPI1346308798

Entity TypeIndividualFemale

Primary Taxonomy207Q00000X

Provider Legal NameDR. JANA TOMSKYCredential: M.D.

Location Address5439 CLAYTON RD STE BClayton, CA 94517-1076

Mailing Address5439 Clayton Rd Ste BClayton, CA 94517-1076 · (925) 672-6744

Phone(925) 672-6744

Sole ProprietorYes

Enumeration DateDecember 5, 2006

Last NPPES UpdateMarch 27, 2018

✔ NPI 1346308798 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses

★ Primary SpecialtyFamily MedicineAllopathic & Osteopathic Physicians

Taxonomy Code207Q00000X

License✔ Licensed in CA · A84411

Definition

Family Medicine is the medical specialty which is concerned with the total health care of the individual and the family. It is the specialty in breadth which integrates the biological, clinical, and behavioral sciences. The scope of family medicine is not limited by age, sex, organ system, or disease entity.

5439 CLAYTON RD STE B, Clayton, CA 94517

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Medicare Participation & PECOS CMS

Medicare enrollment, assignment, billing reassignment, and ordering and referring status from CMS.

Medicare Enrollment Status

✔

Enrolled in Medicare (PECOS)

Dr. Jana Tomsky M.d. is registered in the CMS Provider Enrollment, Chain and Ownership System (PECOS).

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.

Medicare Billing Reassignments

Medicare enrollment records show Jana Tomsky reassigns Medicare billing to 2 organizations. Each organization bills Medicare for the services this provider delivers there; the nearest is listed first.

John Muir Trauma Physicians Billing Service

5.4 mi

Trauma Surgery

1601 YGNACIO VALLEY RD
Walnut Creek, CA 94598

Reassigned Medicare billing, California enrollment
810 clinicians in this Medicare group

NPI 1962551861 (925) 947-5331

John Muir Physician Network

5.6 mi

General Practice

1450 TREAT BLVD, SUITE 300
Walnut Creek, CA 94597

Reassigned Medicare billing, California enrollment
650 clinicians in this Medicare group

NPI 1841407665 (925) 296-9872

Source: CMS Revalidation Reassignment List, October 2026 release. Reassignment records can lag staffing changes; confirm a current affiliation with the organization.

Areas of Expertise CMS Part B claims

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.

New patient office or other outpatient visit with moderate level of medical decision making, if using time, 45 minutes or more 99204

This is a first-time office or outpatient visit lasting between 45-59 minutes. The healthcare provider evaluates your health, discusses your medical history, and may suggest further tests or treatments. It's an opportunity to ask questions and understand your health better.

11 services11 patients

Physician Visit Costs CMS claims · ZIP area

Typical Medicare office-visit costs in the 94517 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

$104.51 typical visit price

range $69.00 – $202.35

Typical copayment $26.12 (range $17.25 – $50.58)

Most-billed visit code 99203

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 2

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

MS. HEATHER LINNEA LESIEUR PA-C, MS, MPH

Physician Assistant

5439 CLAYTON RD STE B
CLAYTON, CA 94517

Contra Costa County (925) 672-6744

CLAYTON VALLEY MEDICAL GROUP, INC

Family Medicine

5439 CLAYTON RD STE B
CLAYTON, CA 94517

Contra Costa County (925) 672-6744

Frequently Asked Questions NPPES & CMS

Common questions about this NPI record, answered from the official NPPES registry and CMS datasets shown on this page.

What is Jana Tomsky's NPI number?

The NPI number for Jana Tomsky is 1346308798. It was assigned to this individual provider in the NPPES registry on December 5, 2006.

Where is Jana Tomsky located?

Jana Tomsky practices at 5439 Clayton Rd Ste B, Clayton, CA 94517. The listed phone number is (925) 672-6744.

What is Jana Tomsky's specialty?

The primary specialty registered for this NPI is Family Medicine with taxonomy code 207Q00000X.

Is Jana Tomsky enrolled in Medicare?

Yes. Jana Tomsky is registered in the Medicare PECOS enrollment system.

Which organizations bill Medicare for Jana Tomsky's services?

According to the CMS Revalidation Reassignment List (October 2026 release), Jana Tomsky reassigns Medicare benefits to 2 organizations: John Muir Trauma Physicians Billing Service (Walnut Creek, CA) and John Muir Physician Network (Walnut Creek, CA). Each reassignment is filed with Medicare on form CMS-855R, signed by both the clinician and the organization, and lets the organization bill Medicare and receive payment for Jana Tomsky's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.

When was this NPI record last updated?

The NPPES record for Jana Tomsky was last updated on March 27, 2018. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 8 years 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.