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IRENE SHIH MD
NPI 1982773966
Internal Medicine in Palo Alto, CA

Active since November 06, 2006PECOS EnrolledCLIA 05D1050973 · Waiver
211 QUARRY RD, STE 203 MC5993, PALO ALTO, CA 94304(650) 325-6778(650) 325-1816 Get Directions Write a Review

NPPES record last updated: March 27, 2013. Verified against the NPPES registry weekly; last sync: August 16, 2026.

About Irene Shih Md NPPES

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

IRENE SHIH MD (NPI 1982773966) is an individual internal medicine provider in Palo Alto, California, licensed in California (A54608) and active in the NPI registry since November 2006. She is enrolled in Medicare PECOS, holds a CLIA Waiver certificate valid through February 15, 2028, and is a graduate of University Of California, San Francisco School Of Medicine (1994).

NPPES Registry Identity

NPI1982773966
Entity TypeIndividualFemale
Primary Taxonomy207R00000X
Provider Legal NameIRENE SHIHCredential: MD
Location Address211 QUARRY RD, STE 203 MC5993Palo Alto, CA 94304-1416
Mailing Address211 Quarry Rd, Ste 203 Mc5993Palo Alto, CA 94304-1416 · (650) 325-6778 · Fax (650) 325-1816
Phone(650) 325-6778
Fax(650) 325-1816
Sole ProprietorNo
Medical School CMSUniversity Of California, San Francisco School Of MedicineGraduated 1994
Enumeration DateNovember 6, 2006
Last NPPES UpdateMarch 27, 2013
✔ NPI 1982773966 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 · A54608
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.
211 QUARRY RD, Palo Alto, CA 94304
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Other Identifiers 1

Medicare UPING64787

Medicare Participation & PECOS CMS

Medicare enrollment, assignment, and ordering and referring status from the CMS PECOS system.

Medicare Enrollment Status

✔

Enrolled in Medicare (PECOS)

Irene Shih Md is registered in the CMS Provider Enrollment, Chain and Ownership System (PECOS).

PECOS PAC ID8426083510
PECOS Enrollment IDI20050927001550
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.

CLIA Laboratory Certificates CMS CLIA

Laboratory certificates issued under the Clinical Laboratory Improvement Amendments (CLIA) program, which sets federal quality standards for human laboratory testing in the United States. There is no official CMS crosswalk between CLIA and NPI numbers; these certificates are associated with this NPI by matching facility names, locations and phone numbers in the CMS CLIA registry.

Certificate of Waiver 05D1050973

Irene Shih MD · Palo Alto, CA
Active · expires Feb 15, 2028
CLIA Number05D1050973
Laboratory TypePhysician Office
Certificate Effective DateFebruary 16, 2026
Certificate Expiration DateFebruary 15, 2028
Laboratory DirectorIrene Shih
Laboratory Phone(650) 325-6778
Laboratory LocationIrene Shih MD211 Quarry Rd Ste 203 Mail Code 5993, Palo Alto, CA 94304
CLIA data matches this NPI record on: Address Name Phone
This certificate is issued to a laboratory to perform only waived tests.

Areas of Expertise CMS Part B claims 8

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.

Established patient office or other outpatient visit with high level of medical decision making, if using time, 40 minutes or more 99215
This service involves a follow-up appointment for existing patients, lasting between 40 to 54 minutes. During this time, your healthcare provider will assess your current health status, discuss any changes or concerns, review your treatment plan, and answer any questions you may have.
258 services89 patients
Telephone medical discussion with physician, 21-30 minutes 99443
This service involves a 21-30 minute phone conversation with a physician. It's a chance for you to discuss your health concerns, symptoms or treatment plans. It's similar to an in-person consultation, but conducted over the phone for your convenience and safety.
69 services44 patients
Annual wellness visit, includes a personalized prevention plan of service (pps), subsequent visit G0439
An annual wellness visit is a yearly appointment with your primary care provider to create or update a personalized prevention plan. This plan helps prevent illness based on your current health and risk factors. It's a subsequent visit, meaning it follows an initial assessment.
47 services47 patients
Prolonged office or other outpatient evaluation and management service(s) beyond the maximum required time of the primary procedure which has been selected using total time on the date of the primary service; each additional 15 minutes by the physician or G2212
This service refers to extended doctor visits where your healthcare provider spends additional time evaluating and managing your health beyond the primary procedure's required time. This includes each extra 15 minutes spent by the physician on the same day as the primary service.
42 services19 patients
Established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more 99214
This is a routine check-up for patients who have previously visited our clinic. It involves a comprehensive review of your health and any ongoing treatments. The consultation lasts between 30-39 minutes, allowing enough time to discuss any concerns.
27 services23 patients
Telephone medical discussion with physician, 11-20 minutes 99442
This is a service where you have a phone conversation with your doctor for 11-20 minutes. It's used for discussing health concerns, reviewing test results, or managing ongoing conditions. It's a convenient way to receive medical advice without an in-person visit.
23 services20 patients

Physician Visit Costs CMS claims · ZIP area

Typical Medicare office-visit costs in the 94304 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.

DR. IAN J NELLIGAN M.D.
Family Medicine
211 QUARRY RD
PALO ALTO, CA 94304
Santa Clara County (650) 498-5409
SEE LOR PHARMD
Pharmacist
211 QUARRY RD
PALO ALTO, CA 94304
Santa Clara County (650) 326-2300
DR. ELIZABETH YOSHIKO KOEHLER MD
Internal Medicine
211 QUARRY RD, SUITE 305
PALO ALTO, CA 94304
Santa Clara County (650) 723-6028
ELIZABETH R GREYBER MD
Internal Medicine
211 QUARRY RD, MC 5989
PALO ALTO, CA 94304
Santa Clara County (650) 736-5211
STUART MARK SCHLISSERMAN MD
Internal Medicine
211 QUARRY RD, STE 203 MC5993
PALO ALTO, CA 94304
Santa Clara County (650) 325-6778
SILVIA TEE M.D.
Internal Medicine
211 QUARRY RD, SUITE 402
PALO ALTO, CA 94304
Santa Clara County (650) 725-5222
DR. NANCY MORIOKA-DOUGLAS M.D., M.P.H.
Family Medicine
211 QUARRY RD, , N 349
PALO ALTO, CA 94304
Santa Clara County (650) 723-6963
MAREN LIV PEDERSEN MD
Internal Medicine
211 QUARRY RD, STE 203 MC5993
PALO ALTO, CA 94304
Santa Clara County (650) 325-6778

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 Irene Shih's NPI number?

The NPI number for Irene Shih is 1982773966. It was assigned to this individual provider in the NPPES registry on November 6, 2006.

Where is Irene Shih located?

Irene Shih practices at 211 Quarry Rd Ste 203 Mc5993, Palo Alto, CA 94304. The listed phone number is (650) 325-6778.

What is Irene Shih's specialty?

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

Is Irene Shih enrolled in Medicare?

Yes. Irene Shih is registered in the Medicare PECOS enrollment system.

Does Irene Shih hold a CLIA laboratory certificate?

Yes. A Certificate of Waiver (number 05D1050973) is associated with this NPI, valid through February 15, 2028. CLIA certificates authorize laboratory testing under the federal Clinical Laboratory Improvement Amendments program.

When was this NPI record last updated?

The NPPES record for Irene Shih was last updated on March 27, 2013. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 13 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.