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MAY CHIEN MD
NPI 1417221326
Pediatrics - Pediatric Hematology-Oncology in Palo Alto, CA

Active since February 24, 2012PECOS EnrolledAccepts Medicare Assignment
76.5/100
CMS Quality Rating
1000 WELCH RD STE 300, PALO ALTO, CA 94304(650) 723-5535 Get Directions Write a Review

NPPES record last updated: April 18, 2024. Verified against the NPPES registry weekly; last sync: October 04, 2026.

Record update history: Apr 18, 2024, Jul 8, 2019 (2 updates tracked since 2019).

About May Chien Md NPPES

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

MAY CHIEN MD (NPI 1417221326) is an individual pediatric hematology-oncology provider in Palo Alto, California, licensed in California (A119918) and active in the NPI registry since February 2012. She is enrolled in Medicare PECOS, maintains a secondary practice location in Los Angeles, and is a graduate of Other (2010).

NPPES Registry Identity

NPI1417221326
Entity TypeIndividualFemale
Primary Taxonomy2080P0207X
Provider Legal NameMAY CHIENCredential: MD
Location Address1000 WELCH RD STE 300Palo Alto, CA 94304-1812
Mailing Address725 Welch RdPalo Alto, CA 94304-1601 · (650) 497-8000
Phone(650) 723-5535
Sole ProprietorNo
Medical School CMSOtherGraduated 2010
Enumeration DateFebruary 24, 2012
Last NPPES UpdateApril 18, 20242 updates tracked since enumeration
NPPES CertifiedApril 18, 2024
✔ NPI 1417221326 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses 4

★ Primary SpecialtyPediatrics · Pediatric Hematology-OncologyAllopathic & Osteopathic Physicians
Taxonomy Code2080P0207X
License✔ Licensed in CA · A119918
Definition
A pediatrician trained in the combination of pediatrics, hematology and oncology to recognize and manage pediatric blood disorders and cancerous diseases.
Also ListedInternal MedicineTaxonomy 207R00000X · License A119918 (CA)
Also ListedInternal Medicine · HematologyTaxonomy 207RH0000X · License A119918 (CA)
Also ListedPediatricsTaxonomy 208000000X · License A119918 (CA)
1000 WELCH RD STE 300, Palo Alto, CA 94304
Open in Google Maps ↗

Secondary Practice Location 1

Location 11200 N State St, CT-A7DLos Angeles, CA 90033-1029 · Phone (323) 226-7556 · Fax (323) 226-2657

Other Identifiers 1

Other113287CA · Sid # 113287

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

May Chien 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 ID6507085032
PECOS Enrollment IDI20140916001710
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 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 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.
43 services23 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.
35 services34 patients
New patient office or other outpatient visit with a high level of medical decision making, if using time, 60 minutes or more 99205
This is a first-time patient visit where a healthcare professional spends 60-74 minutes with you. It involves a comprehensive evaluation, including your medical history and current health condition. They'll also advise on preventive health measures and formulate a treatment plan if needed.
15 services15 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.
15 services14 patients
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.
15 services12 patients

Medicare Quality Performance CMS QPP · MIPS

Performance in the CMS Quality Payment Program: the MIPS final score across four weighted categories, and the individual quality measures reported to Medicare.

76.5/100
MIPS Final ScoreMerit-based Incentive Payment System · CMS Quality Payment Program
Scored as part of a group practice
Quality74.31
Promoting Interoperability100
Improvement Activities40
Cost43.95

Other Providers at the Same Location NPPES

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

DR. CHRISTOPHER JOHN SEVERYN M.D., PH.D.
Pediatrics
1000 WELCH RD STE 300
PALO ALTO, CA 94304
Santa Clara County (650) 723-5535

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 May Chien's NPI number?

The NPI number for May Chien is 1417221326. It was assigned to this individual provider in the NPPES registry on February 24, 2012.

Where is May Chien located?

May Chien practices at 1000 Welch Rd Ste 300, Palo Alto, CA 94304. The listed phone number is (650) 723-5535.

What is May Chien's specialty?

The primary specialty registered for this NPI is Pediatrics, specializing in Pediatric Hematology-Oncology, with taxonomy code 2080P0207X.

Is May Chien enrolled in Medicare?

Yes. May Chien 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 May Chien was last updated on April 18, 2024. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 2 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.