Recently Updated NPI Information — some details in this NPI profile have been updated in the NPI registry within the last 60 days.

MARIA O ORTIZ CASTILLO M.D.
NPI 1811298516
Hospitalist in Pasadena, CA

Q: What is Maria Ortiz Castillo's NPI number?

The NPI number for Maria Ortiz Castillo is 1811298516. It was assigned to this individual provider in the NPPES registry on November 11, 2010. The provider is also known as Maria Olivia Ortiz Castillo M.D..

Q: What is Maria Ortiz Castillo's specialty?

The primary specialty registered for this NPI is Hospitalist with taxonomy code 208M00000X.

Active since November 11, 2010PECOS Enrolled

100 W CALIFORNIA BLVD, PASADENA, CA 91105(626) 397-8300 Get Directions Write a Review

NPPES record last updated: July 15, 2026. Verified against the NPPES registry weekly; last sync: August 09, 2026.

Record update history: Jul 15, 2026, Nov 19, 2020, Mar 16, 2020 and 1 more (4 updates tracked since 2018).

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About Maria O Ortiz Castillo M.d. NPPES

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

MARIA O ORTIZ CASTILLO M.D. (NPI 1811298516) is an individual hospitalist provider in Pasadena, California, licensed in California (A121001) and active in the NPI registry since November 2010. She is enrolled in Medicare PECOS, maintains 3 additional practice locations, and is a graduate of University Of California, Geffen School Of Medicine (2010).

NPPES Registry Identity

NPI1811298516

Entity TypeIndividualFemale

Primary Taxonomy208M00000X

Provider Legal NameMARIA O ORTIZ CASTILLOCredential: M.D.

Location Address100 W CALIFORNIA BLVDPasadena, CA 91105-3010

Mailing AddressPo Box 512185Los Angeles, CA 90051-0185 · (626) 256-4673

Phone(626) 397-8300

Sole ProprietorYes

Medical School CMSUniversity Of California, Geffen School Of MedicineGraduated 2010

Enumeration DateNovember 11, 2010

Last NPPES UpdateJuly 15, 20264 updates tracked since enumeration

NPPES CertifiedJuly 15, 2026

✔ NPI 1811298516 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses 2

★ Primary SpecialtyHospitalistAllopathic & Osteopathic Physicians

Taxonomy Code208M00000X

License✔ Licensed in CA · A121001

Definition

Hospitalists are physicians whose primary professional focus is the general medical care of hospitalized patients. Their activities include patient care, teaching, research, and leadership related to Hospital Medicine. The term 'hospitalist' refers to physicians whose practice emphasizes providing care for hospitalized patients.

Also ListedInternal MedicineTaxonomy 207R00000X · License A121001 (CA)

100 W CALIFORNIA BLVD, Pasadena, CA 91105

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Other Names 1

Professional Name (2)Maria Olivia Ortiz Castillo M.d.

Secondary Practice Locations 3

Location 11500 Duarte RdDuarte, CA 91010-3012 · Phone (626) 256-4673

Location 2880 S Atlantic Blvd, Suite 101Monterey Park, CA 91754-4700 · Phone (626) 281-6969

Location 31414 S Grand Ave Ste 100Los Angeles, CA 90015 · Phone (213) 481-2200 · Fax (213) 481-7023

Accepted Insurance

The full list of accepted plans is on the Insurance tab. Issuers include Premera Blue Cross Blue Shield of Alaska.Insurance ›

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

Maria O Ortiz Castillo M.d. 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 ID6901125574

PECOS Enrollment IDI20150501001843

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 3

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.

432 services100 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.

88 services75 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.

64 services41 patients

Physician Visit Costs CMS claims · ZIP area

Typical Medicare office-visit costs in the 91105 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.

Referred Medical Equipment & Supplies CMS DME claims 4

Durable medical equipment, devices and supplies this provider ordered from DME suppliers for patients, from Medicare fee-for-service claims.

Portable gaseous oxygen system, rental; includes portable container, regulator, flowmeter, humidifier, cannula or mask, and tubing E0431

DME-Oxygen and Supplies · category DC000N

2 suppliers34 claims34 services$12.71 avg. paid by Medicare

Home ventilator, any type, used with non-invasive interface, (e.g., mask, chest shell) E0466

DME-Other DME · category DE005N

1 supplier12 claims12 services$767.63 avg. paid by Medicare

Nebulizer, with compressor E0570

DME-Other DME · category DE000N

4 suppliers18 claims18 services$2.86 avg. paid by Medicare

Oxygen concentrator, single delivery port, capable of delivering 85 percent or greater oxygen concentration at the prescribed flow rate E1390

DME-Oxygen and Supplies · category DC002N

2 suppliers34 claims34 services$61.47 avg. paid by Medicare

Dollar amounts are the average Medicare paid the supplier per service. They are not the cost to the patient.

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.

SARAH STEPHENS NP

Nurse Practitioner (Acute Care)