JEE HOON JANG MD
NPI 1639691579
Internal Medicine in Simi Valley, CA

Q: What is Jee Hoon Jang's NPI number?

The NPI number for Jee Hoon Jang is 1639691579. It was assigned to this individual provider in the NPPES registry on July 12, 2017.

Q: What is Jee Hoon Jang's specialty?

The primary specialty registered for this NPI is Internal Medicine with taxonomy code 207R00000X.

Q: When was this NPI record last updated?

The NPPES record for Jee Hoon Jang was last updated on January 8, 2026. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 9 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.

Active since July 12, 2017PECOS EnrolledAccepts Medicare Assignment

1424 MADERA RD, SIMI VALLEY, CA 93065(805) 522-5722(805) 915-4141 Get Directions Write a Review

NPPES record last updated: January 8, 2026. Verified against the NPPES registry weekly; last sync: October 18, 2026.

Record update history: Jan 8, 2026, Jun 18, 2025, Jul 13, 2022 and 1 more (4 updates tracked since 2017).

On this page

About Jee Hoon Jang Md NPPES

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

JEE HOON JANG MD (NPI 1639691579) is an individual internal medicine provider in Simi Valley, California, licensed in California (A173800) and active in the NPI registry since July 2017. He is enrolled in Medicare PECOS and is a graduate of Other (2015).

NPPES Registry Identity

NPI1639691579

Entity TypeIndividualMale

Primary Taxonomy207R00000X

Provider Legal NameJEE HOON JANGCredential: MD

Location Address1424 MADERA RDSimi Valley, CA 93065-3053

Mailing Address1040 Flynn RdCamarillo, CA 93012-5092 · (805) 673-3930 · Fax (805) 659-3217

Phone(805) 522-5722

Fax(805) 915-4141

Sole ProprietorNo

Medical School CMSOtherGraduated 2015

Enumeration DateJuly 12, 2017

Last NPPES UpdateJanuary 8, 20264 updates tracked since enumeration

NPPES CertifiedJanuary 8, 2026

✔ NPI 1639691579 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses 2

★ Primary SpecialtyInternal MedicineAllopathic & Osteopathic Physicians

Taxonomy Code207R00000X

License✔ Licensed in CA · A173800

Definition

A physician who provides long-term, comprehensive care in the office and the hospital, managing both common and complex illness of adolescents, adults and the elderly. Internists are trained in the diagnosis and treatment of cancer, infections and diseases affecting the heart, blood, kidneys, joints and digestive, respiratory and vascular systems. They are also trained in the essentials of primary care internal medicine, which incorporates an understanding of disease prevention, wellness, substance abuse, mental health and effective treatment of common problems of the eyes, ears, skin, nervous system and reproductive organs.

Also ListedPathology · Clinical InformaticsTaxonomy 207ZC0008X · License A173800 (CA)

1424 MADERA RD, Simi Valley, CA 93065

Open in Google Maps ↗

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

Jee Hoon 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 ID1254712102

PECOS Enrollment IDI20220722002721

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 Jee Hoon Jang reassigns Medicare billing to 2 organizations. Each organization bills Medicare for the services this provider delivers there; the nearest is listed first.

Clinicas Del Camino Real Inc

Same address

Federally Qualified Health Center (FQHC)

1424 MADERA RD
Simi Valley, CA 93065

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

NPI 1720362056 (805) 522-5722

Jonah Medical Group, Inc.

32 mi

Family Medicine

866 S WESTMORELAND AVE STE 101
Los Angeles, CA 90005

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

NPI 1942591847 (213) 380-2266

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

Physician Visit Costs CMS claims · ZIP area

Typical Medicare office-visit costs in the 93065 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

$140.72 typical visit price

range $62.32 – $185.36

Typical copayment $35.18 (range $15.58 – $46.34)

Most-billed visit code 99204

Established Patient

$108.74 typical visit price

range $20.68 – $151.85

Typical copayment $27.18 (range $5.17 – $37.96)

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 10

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

BETTY GUTMAN LCSW

Social Worker (Clinical)