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DR. STEPHEN LLOYD CATALYA MD
NPI 1881100832
Internal Medicine - Infectious Disease in Pleasant Hill, CA

Active since December 28, 2017PECOS EnrolledAccepts Medicare Assignment
400 TAYLOR BLVD STE 102, PLEASANT HILL, CA 94523(925) 671-7629(925) 978-0991 Get Directions Write a Review

NPPES record last updated: November 13, 2025. Verified against the NPPES registry weekly; last sync: July 26, 2026.

Record update history: Nov 13, 2025, Jul 8, 2020, Dec 28, 2017 (3 updates tracked since 2017).

About Dr. Stephen Lloyd Catalya Md NPPES

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

DR. STEPHEN LLOYD CATALYA MD (NPI 1881100832) is an individual infectious disease provider in Pleasant Hill, California, licensed in California (A153090) and active in the NPI registry since December 2017. He is enrolled in Medicare PECOS and is a graduate of Other (2014).

NPPES Registry Identity

NPI1881100832
Entity TypeIndividualMale
Primary Taxonomy207RI0200X
Provider Legal NameDR. STEPHEN LLOYD CATALYACredential: MD
Location Address400 TAYLOR BLVD STE 102Pleasant Hill, CA 94523-2147
Mailing Address2500 Mowry Ave Ste 255Fremont, CA 94538-1605 · (510) 248-1550
Phone(925) 671-7629
Fax(925) 978-0991
Sole ProprietorNo
Medical School CMSOtherGraduated 2014
Enumeration DateDecember 28, 2017
Last NPPES UpdateNovember 13, 20253 updates tracked since enumeration
NPPES CertifiedNovember 13, 2025
✔ NPI 1881100832 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses

★ Primary SpecialtyInternal Medicine · Infectious DiseaseAllopathic & Osteopathic Physicians
Taxonomy Code207RI0200X
License✔ Licensed in CA · A153090
Definition
An internist who deals with infectious diseases of all types and in all organ systems. Conditions requiring selective use of antibiotics call for this special skill. This physician often diagnoses and treats AIDS patients and patients with fevers which have not been explained. Infectious disease specialists may also have expertise in preventive medicine and travel medicine.
400 TAYLOR BLVD STE 102, Pleasant Hill, CA 94523
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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

Dr. Stephen Lloyd Catalya 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 ID9537408059
PECOS Enrollment IDI20200929000705
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.
1,317 services276 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.
212 services191 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.
39 services28 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.
16 services15 patients

Physician Visit Costs CMS claims · ZIP area

Typical Medicare office-visit costs in the 94523 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
$153.83 typical visit price
range $69.00 – $202.35
Typical copayment $38.45 (range $17.25 – $50.58)
Most-billed visit code 99204
Established Patient
$119.48 typical visit price
range $23.44 – $166.46
Typical copayment $29.87 (range $5.86 – $41.61)
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

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

TEERA CHENTANEZ M.D.
Internal Medicine (Infectious Disease)
400 TAYLOR BLVD STE 102
PLEASANT HILL, CA 94523
Contra Costa County (925) 687-2570

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 Stephen Catalya's NPI number?

The NPI number for Stephen Catalya is 1881100832. It was assigned to this individual provider in the NPPES registry on December 28, 2017.

Where is Stephen Catalya located?

Stephen Catalya practices at 400 Taylor Blvd Ste 102, Pleasant Hill, CA 94523. The listed phone number is (925) 671-7629.

What is Stephen Catalya's specialty?

The primary specialty registered for this NPI is Internal Medicine, specializing in Infectious Disease, with taxonomy code 207RI0200X.

Is Stephen Catalya enrolled in Medicare?

Yes. Stephen Catalya 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 Stephen Catalya was last updated on November 13, 2025. NPI Profile syncs with the weekly NPPES data releases published by CMS.