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TIMOTHY JANG MD
NPI 1801358775
Internal Medicine - Infectious Disease in Walnut Creek, CA

Active since April 01, 2019PECOS EnrolledAccepts Medicare Assignment
365 LENNON LN STE 200, WALNUT CREEK, CA 94598(925) 947-2334 Get Directions Write a Review

NPPES record last updated: December 3, 2024. Verified against the NPPES registry weekly; last sync: October 25, 2026.

Record update history: Dec 3, 2024, Apr 1, 2019 (2 updates tracked since 2019).

About Timothy Jang Md NPPES

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

TIMOTHY JANG MD (NPI 1801358775) is an individual infectious disease provider in Walnut Creek, California, licensed in California (A196261) and active in the NPI registry since April 2019. He is enrolled in Medicare PECOS and is a graduate of Indiana University School Of Medicine (2019).

NPPES Registry Identity

NPI1801358775
Entity TypeIndividualMale
Primary Taxonomy207RI0200X
Provider Legal NameTIMOTHY JANGCredential: MD
Location Address365 LENNON LN STE 200Walnut Creek, CA 94598-5912
Mailing Address365 Lennon Ln Ste 200Walnut Creek, CA 94598-5912
Phone(925) 947-2334
Sole ProprietorNo
Medical School CMSIndiana University School Of MedicineGraduated 2019
Enumeration DateApril 1, 2019
Last NPPES UpdateDecember 3, 20242 updates tracked since enumeration
NPPES CertifiedDecember 3, 2024
✔ NPI 1801358775 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses

★ Primary SpecialtyInternal Medicine · Infectious DiseaseAllopathic & Osteopathic Physicians
Taxonomy Code207RI0200X
License✔ Licensed in CA · A196261
Definition
An internist who deals with infectious diseases of all types and in all organ systems. Conditions requiring selective use of antibiotics call for this special skill. This physician often diagnoses and treats AIDS patients and patients with fevers which have not been explained. Infectious disease specialists may also have expertise in preventive medicine and travel medicine.
365 LENNON LN STE 200, Walnut Creek, CA 94598
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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 and accepts Medicare assignment

Timothy Jang Md 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 ID6103150107
PECOS Enrollment IDI20240723001678
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

2

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

Bay Area Surgical Specialists Inc A Medical Corporation
0.5 mi
Magnetic Resonance Imaging (MRI)
2637 SHADELANDS DR
Walnut Creek, CA 94598
  • Reassigned Medicare billing, California enrollment
  • Medicare enrollment name: Bass Medical Group
  • 347 clinicians in this Medicare group
NPI 1023501905 (925) 329-3710
Contra Costa County
3.1 mi
Adult Mental Health
1420 WILLOW PASS RD
Concord, CA 94520
  • Reassigned Medicare billing, California enrollment
  • 530 clinicians in this Medicare group
NPI 1023188489 (925) 646-5480

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 3

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.

Subsequent hospital care with moderate levelof medical decision making, if using time, at least 50 minutes 99233
Follow-up hospital inpatient care per day typically involves a 35-minute check-up by your healthcare provider. This service includes monitoring your health progress, adjusting your treatment plan if needed, and answering any questions you may have about your condition or care.
342 services129 patients
Initial hospital care with moderate level of medical decision making, if using time, at least 75 minutes 99223
Initial hospital inpatient care per day, typically 70 minutes, refers to the daily medical service provided to patients admitted to the hospital. This includes a comprehensive evaluation, diagnosis, treatment plan, and monitoring of your health condition. It ensures your well-being during your hospital stay.
94 services92 patients
Subsequent hospital care with moderate levelof medical decision making, if using time, at least 35 minutes 99232
Follow-up hospital inpatient care involves daily check-ups while you're admitted in the hospital. Typically, a healthcare provider spends about 25 minutes each day reviewing your condition, adjusting treatment if needed, and answering any questions you might have.
85 services58 patients

Physician Visit Costs CMS claims · ZIP area

Typical Medicare office-visit costs in the 94598 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 6

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

SILPA JETTY MD
Internal Medicine (Infectious Disease)
365 LENNON LN STE 200
WALNUT CREEK, CA 94598
Contra Costa County (925) 947-2334
MARIA CHRISTINA MAGAT PINGOL RN, FNP-BC
Nurse Practitioner (Family)
365 LENNON LN STE 200
WALNUT CREEK, CA 94598
Contra Costa County (925) 947-2334
SZILVIA MOLITORISZ MD
Internal Medicine (Infectious Disease)
365 LENNON LN STE 200
WALNUT CREEK, CA 94598
Contra Costa County (925) 947-2334
NIMISHA MISHRA-SHUKLA MD
Internal Medicine (Infectious Disease)
365 LENNON LN STE 200
WALNUT CREEK, CA 94598
Contra Costa County (925) 947-2334
STACY CATHERINE WELCOME P.A.-C.
Physician Assistant
365 LENNON LN STE 200
WALNUT CREEK, CA 94598
Contra Costa County (925) 947-2334
ESTHER MARGARET MOLNAR MD
Internal Medicine (Infectious Disease)
365 LENNON LN STE 200
WALNUT CREEK, CA 94598
Contra Costa County (925) 947-2334

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 Timothy Jang's NPI number?

The NPI number for Timothy Jang is 1801358775. It was assigned to this individual provider in the NPPES registry on April 1, 2019.

Where is Timothy Jang located?

Timothy Jang practices at 365 Lennon Ln Ste 200, Walnut Creek, CA 94598. The listed phone number is (925) 947-2334.

What is Timothy Jang's specialty?

The primary specialty registered for this NPI is Internal Medicine, specializing in Infectious Disease, with taxonomy code 207RI0200X.

Is Timothy Jang enrolled in Medicare?

Yes. Timothy Jang is registered in the Medicare PECOS system and accepts Medicare assignment, which means accepting the Medicare-approved amount as payment in full for covered services.

Which organizations bill Medicare for Timothy Jang's services?

According to the CMS Revalidation Reassignment List (October 2026 release), Timothy Jang reassigns Medicare benefits to 2 organizations: Bay Area Surgical Specialists Inc A Medical Corporation (Walnut Creek, CA) and Contra Costa County (Concord, 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 Timothy Jang'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 Timothy Jang was last updated on December 3, 2024. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 22 months 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.