CATHERINE S MAO M.D.
NPI 1073567236
Pediatrics - Pediatric Endocrinology in Torrance, CA

Q: What is the provider's specialty?

The provider's specialty is Pediatrics with taxonomy code 2080P0205X and a focus in Pediatric Endocrinology.

Active since May 20, 2006PECOS Enrolled

21840 NORMANDIE AVE, STE. 1100, TORRANCE, CA 90502(310) 222-5133(310) 781-9352 Get Directions Write a Review

NPPES record last updated: July 23, 2019. Verified against the NPPES registry weekly; last sync: July 19, 2026.

Record update history: Jul 23, 2019, May 21, 2019 (2 updates tracked since 2019).

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About Catherine S Mao M.d. NPPES

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

CATHERINE S MAO M.D. (NPI 1073567236) is an individual pediatric endocrinology provider in Torrance, California, licensed in California (A51970) and active in the NPI registry since May 2006. She is enrolled in Medicare PECOS and maintains a secondary practice location in Torrance.

NPPES Registry Identity

NPI1073567236

Entity TypeIndividualFemale

Primary Taxonomy2080P0205X

Provider Legal NameCATHERINE S MAOCredential: M.D.

Location Address21840 NORMANDIE AVE, STE. 1100Torrance, CA 90502-2047

Mailing Address21840 Normandie Ave Ste 700Torrance, CA 90502-2047 · (310) 222-5189 · Fax (310) 328-1415

Phone(310) 222-5133

Fax(310) 781-9352

Sole ProprietorNo

Enumeration DateMay 20, 2006

Last NPPES UpdateJuly 23, 20192 updates tracked since enumeration

✔ NPI 1073567236 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses

★ Primary SpecialtyPediatrics · Pediatric EndocrinologyAllopathic & Osteopathic Physicians

Taxonomy Code2080P0205X

License✔ Licensed in CA · A51970

Definition

A pediatrician who provides expert care to infants, children and adolescents who have diseases that result from an abnormality in the endocrine glands (glands which secrete hormones). These diseases include diabetes mellitus, growth failure, unusual size for age, early or late pubertal development, birth defects, the genital region and disorders of the thyroid, the adrenal and pituitary glands.

21840 NORMANDIE AVE, Torrance, CA 90502

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Secondary Practice Location 1

Location 11000 W Carson StTorrance, CA 90502-2004 · Phone (310) 222-5189

Medicare Participation & PECOS CMS

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

Medicare Enrollment Status

✔

Enrolled in Medicare (PECOS)

Catherine S Mao M.d. is registered in the CMS Provider Enrollment, Chain and Ownership System (PECOS).

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.

Physician Visit Costs CMS claims · ZIP area

Typical Medicare office-visit costs in the 90502 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

$142.39 typical visit price

range $62.96 – $187.60

Typical copayment $35.59 (range $15.74 – $46.90)

Most-billed visit code 99204

Established Patient

$109.96 typical visit price

range $20.84 – $153.61

Typical copayment $27.49 (range $5.21 – $38.40)

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.