RYAN S CHIANG MD
NPI 1891323986
Internal Medicine in Stanford, CA

Active since April 01, 2020PECOS EnrolledAccepts Medicare Assignment
300 PASTEUR DR, STANFORD, CA 94305(650) 723-4000 Get Directions Write a Review

NPPES record last updated: April 18, 2024. Verified against the NPPES registry weekly; last sync: July 26, 2026.

Record update history: Apr 18, 2024, Apr 1, 2020 (2 updates tracked since 2020).

About Ryan S Chiang Md NPPES

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

RYAN S CHIANG MD (NPI 1891323986) is an individual internal medicine provider in Stanford, California, licensed in California (A185873) and active in the NPI registry since April 2020. He is enrolled in Medicare PECOS, maintains a secondary practice location in Stanford, and is a graduate of Duke University School Of Medicine (2020).

NPPES Registry Identity

NPI1891323986
Entity TypeIndividualMale
Primary Taxonomy207R00000X
Provider Legal NameRYAN S CHIANGCredential: MD
Location Address300 PASTEUR DRStanford, CA 94305-2200
Mailing Address300 Pasteur DrStanford, CA 94305-2200 · (650) 723-4000
Sole ProprietorNo
Medical School CMSDuke University School Of MedicineGraduated 2020
Enumeration DateApril 1, 2020
Last NPPES UpdateApril 18, 20242 updates tracked since enumeration
NPPES CertifiedApril 18, 2024
NPI 1891323986 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses

Primary SpecialtyInternal MedicineAllopathic & Osteopathic Physicians
Taxonomy Code207R00000X
License Licensed in CA · A185873
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.

300 PASTEUR DR, Stanford, CA 94305

Secondary Practice Location 1

Location 1300 Pasteur Drive, Lane 154Stanford, CA 94305-5133 · Phone (650) 723-6661 · Fax (650) 498-6205

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

Ryan S Chiang 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 ID6507226313
PECOS Enrollment IDI20230712000984
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 4

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.
588 services183 patients
Hospital discharge day management, more than 30 minutes 99239
Hospital discharge day management over 30 minutes involves a detailed process to ensure a smooth transition from hospital to home. It includes final examinations, discussion of your hospital stay, post-discharge instructions, and coordinating follow-up care.
136 services131 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.
97 services97 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 services28 patients

Physician Visit Costs CMS claims · ZIP area

Typical Medicare office-visit costs in the 94305 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
$156.67 typical visit price
range $70.37 – $206.04
Typical copayment $39.16 (range $17.59 – $51.51)
Most-billed visit code 99204
Established Patient
$121.77 typical visit price
range $23.96 – $169.60
Typical copayment $30.44 (range $5.99 – $42.40)
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.

Emergency Medicine
300 PASTEUR DR, H3200, M/C 5230
PALO ALTO, CA 94305
Anesthesiology
300 PASTEUR DR
STANFORD, CA 94305
Obstetrics & Gynecology
300 PASTEUR DR
STANFORD, CA 94305
Obstetrics & Gynecology
300 PASTEUR DR
STANFORD, CA 94305
Nurse Practitioner
300 PASTEUR DR, SUMC - PEDS PHYSICIAN BILLING MC:5530
PALO ALTO, CA 94305
Anesthesiology
300 PASTEUR DR
STANFORD, CA 94305
Anesthesiology
300 PASTEUR DR
STANFORD, CA 94305
Anesthesiology
300 PASTEUR DR
STANFORD, CA 94305

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 Ryan Chiang's NPI number?

The NPI number for Ryan Chiang is 1891323986. It was assigned to this individual provider in the NPPES registry on April 1, 2020.

Where is Ryan Chiang located?

Ryan Chiang practices at 300 Pasteur Dr, Stanford, CA 94305. The listed phone number is (650) 723-4000.

What is Ryan Chiang's specialty?

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

Is Ryan Chiang enrolled in Medicare?

Yes. Ryan Chiang 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.

When was this NPI record last updated?

The NPPES record for Ryan Chiang was last updated on April 18, 2024. NPI Profile syncs with the weekly NPPES data releases published by CMS.