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JENNA CHEN
NPI 1689294001
Internal Medicine in Oakland, CA

Active since April 27, 2020PECOS EnrolledAccepts Medicare Assignment
1411 E 31ST ST FL A2, OAKLAND, CA 94602(510) 437-5039(510) 535-7313 Get Directions Write a Review

NPPES record last updated: September 12, 2023. Verified against the NPPES registry weekly; last sync: October 18, 2026.

About Jenna Chen NPPES

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

JENNA CHEN (NPI 1689294001) is an individual internal medicine provider in Oakland, California, licensed in California (20A21773) and active in the NPI registry since April 2020. She is enrolled in Medicare PECOS and is a graduate of Touro Un College Of Osteopathic Medicine, Vallejo (2020).

NPPES Registry Identity

NPI1689294001
Entity TypeIndividualFemale
Primary Taxonomy207R00000X
Provider Legal NameJENNA CHEN
Location Address1411 E 31ST ST FL A2Oakland, CA 94602-1018
Mailing Address1411 E 31st St Fl A2Oakland, CA 94602-1018 · (510) 437-5039 · Fax (510) 535-7313
Phone(510) 437-5039
Fax(510) 535-7313
Sole ProprietorNo
Medical School CMSTouro Un College Of Osteopathic Medicine, VallejoGraduated 2020
Enumeration DateApril 27, 2020
Last NPPES UpdateSeptember 12, 2023
NPPES CertifiedSeptember 12, 2023
✔ NPI 1689294001 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 · 20A21773
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 ListedStudent in an Organized Health Care Education/Training ProgramTaxonomy 390200000X
1411 E 31ST ST FL A2, Oakland, CA 94602
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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

Jenna Chen 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 ID9436505120
PECOS Enrollment IDI20231101002360
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 Reassignment

Medicare enrollment records show Jenna Chen reassigns Medicare billing to 1 organization. The organization bills Medicare for the services this provider delivers there.

Alameda Health System
Same address
Surgery
1411 E 31ST STREET
Oakland, CA 94602
  • Reassigned Medicare billing, California enrollment
  • 900 clinicians in this Medicare group
NPI 1740332931 (510) 437-4800

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 5

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 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.
92 services47 patients
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.
38 services21 patients
Hospital discharge day management, 30 minutes or less 99238
Hospital discharge day management of 30 minutes or less includes finalizing your treatment, discussing your progress, and planning after-care at home. It ensures you're ready to leave the hospital and continue recovery safely.
18 services18 patients
Emergency department visit with high level of medical decision making 99285
An emergency department visit for severe conditions is when you urgently seek medical help due to serious health issues. These could be severe injuries, breathing problems, unbearable pain, or sudden severe illness. Doctors and nurses will provide immediate care to stabilize your condition.
15 services15 patients
Initial hospital care with straightforward or low-level medical decision making, if using time, at least 55 minutes 99222
Initial hospital inpatient care is a service where a healthcare provider spends about 50 minutes per day overseeing your care while you're admitted in the hospital. This includes reviewing your health status, planning your treatment, and ensuring your safety and comfort.
11 services11 patients

Physician Visit Costs CMS claims · ZIP area

Typical Medicare office-visit costs in the 94602 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.

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 Jenna Chen's NPI number?

The NPI number for Jenna Chen is 1689294001. It was assigned to this individual provider in the NPPES registry on April 27, 2020.

Where is Jenna Chen located?

Jenna Chen practices at 1411 E 31st St Fl A2, Oakland, CA 94602. The listed phone number is (510) 437-5039.

What is Jenna Chen's specialty?

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

Is Jenna Chen enrolled in Medicare?

Yes. Jenna Chen 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 organization bills Medicare for Jenna Chen's services?

According to the CMS Revalidation Reassignment List (October 2026 release), Jenna Chen reassigns Medicare benefits to Alameda Health System (Oakland, CA). The 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 Jenna Chen'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 Jenna Chen was last updated on September 12, 2023. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 3 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.