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DR. WILLIAM CONTRERAS M.D.
NPI 1780694273
Internal Medicine in Chula Vista, CA

Active since August 08, 2006PECOS Enrolled
73.62/100
CMS Quality Rating
1400 E PALOMAR ST, CHULA VISTA, CA 91913(858) 499-2616 Get Directions Write a Review

NPPES record last updated: November 21, 2012. Verified against the NPPES registry weekly; last sync: October 18, 2026.

About Dr. William Contreras M.d. NPPES

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

DR. WILLIAM CONTRERAS M.D. (NPI 1780694273) is an individual internal medicine provider in Chula Vista, California, licensed in California (G86860) and active in the NPI registry since August 2006. He is enrolled in Medicare PECOS.

NPPES Registry Identity

NPI1780694273
Entity TypeIndividualMale
Primary Taxonomy207R00000X
Provider Legal NameDR. WILLIAM CONTRERASCredential: M.D.
Location Address1400 E PALOMAR STChula Vista, CA 91913-1800
Mailing Address1400 E Palomar StChula Vista, CA 91913-1800 · (858) 499-2616
Phone(858) 499-2616
Sole ProprietorNo
Enumeration DateAugust 8, 2006
Last NPPES UpdateNovember 21, 2012
✔ NPI 1780694273 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 · G86860
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.
1400 E PALOMAR ST, Chula Vista, CA 91913
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Other Identifiers 3

Medicare ID-Type UnspecifiedWG86860ACA
Medicare UPING34959CA
Medicaid00G868600CA

Medicare Participation & PECOS CMS

Medicare enrollment, assignment, billing reassignment, and ordering and referring status from CMS.

Medicare Enrollment Status

✔

Enrolled in Medicare (PECOS)

Dr. William Contreras 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.

Medicare Billing Reassignments

2

Medicare enrollment records show William Contreras reassigns Medicare billing to 2 organizations. Each organization bills Medicare for the services this provider delivers there; the nearest is listed first.

Emergency And Acute Care Medical Corporation
15 mi
Emergency Medicine
7901 FROST ST
San Diego, CA 92123
  • Reassigned Medicare billing, California enrollment
  • 1,437 clinicians in this Medicare group
NPI 1437103942 (858) 939-3400
Sharp Rees-Stealy Medical Group, Inc
18 mi
Internal Medicine
5651 COPLEY DR STE A
San Diego, CA 92111
  • Reassigned Medicare billing, California enrollment
  • 1,233 clinicians in this Medicare group
NPI 1285616177 (858) 262-6666

Source: CMS Revalidation Reassignment List, October 2026 release. Reassignment records can lag staffing changes; confirm a current affiliation with the organization.

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 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.
150 services67 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.
88 services42 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.
73 services70 patients
Initial hospital care with straightforward or low-level medical decision making, if using time, at least 55 minutes 99222
Initial hospital inpatient care is a service where a healthcare provider spends about 50 minutes per day overseeing your care while you're admitted in the hospital. This includes reviewing your health status, planning your treatment, and ensuring your safety and comfort.
15 services15 patients

Physician Visit Costs CMS claims · ZIP area

Typical Medicare office-visit costs in the 91913 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
$140.22 typical visit price
range $62.10 – $184.71
Typical copayment $35.05 (range $15.52 – $46.17)
Most-billed visit code 99204
Established Patient
$108.42 typical visit price
range $20.62 – $151.42
Typical copayment $27.10 (range $5.15 – $37.85)
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.

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.

73.62/100
MIPS Final ScoreMerit-based Incentive Payment System · CMS Quality Payment Program
Scored as part of a group practice
Quality74.56
Improvement Activities40
Cost58.69

Referred Medical Equipment & Supplies CMS DME claims 2

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
1 supplier36 claims36 services$14.07 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
1 supplier37 claims37 services$59.80 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.

DR. MICHAEL ELYEA PHARM D
Pharmacist
1400 E PALOMAR ST
CHULA VISTA, CA 91913
San Diego County (619) 397-3072
CLAIRE JESSICA WONG MD
Family Medicine
1400 E PALOMAR ST
CHULA VISTA, CA 91913
San Diego County (858) 499-2600
RICHARD BONNORONT PHARM-D
Pharmacist
1400 E PALOMAR ST
CHULA VISTA, CA 91913
San Diego County (619) 397-3060
DR. AMIR REZA DJAVID MD
Dermatology
1400 E PALOMAR ST
CHULA VISTA, CA 91913
San Diego County (619) 397-3295
DR. RICARDO A INDACOCHEA MD
Pediatrics
1400 E PALOMAR ST
CHULA VISTA, CA 91913
San Diego County (858) 499-2600
DR. FRANKLIN MILES BOYER M.D.
Surgery
1400 E PALOMAR ST
CHULA VISTA, CA 91913
San Diego County (619) 397-3140
DR. MICHAEL SONBATY M.D.
Internal Medicine
1400 E PALOMAR ST
CHULA VISTA, CA 91913
San Diego County (858) 499-2616
LINA AMINI M.D.
Ophthalmology (Ophthalmic Plastic and Reconstructive Surgery)
1400 E PALOMAR ST
CHULA VISTA, CA 91913
San Diego County (619) 397-3088

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 William Contreras's NPI number?

The NPI number for William Contreras is 1780694273. It was assigned to this individual provider in the NPPES registry on August 8, 2006.

Where is William Contreras located?

William Contreras practices at 1400 E Palomar St, Chula Vista, CA 91913. The listed phone number is (858) 499-2616.

What is William Contreras's specialty?

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

Is William Contreras enrolled in Medicare?

Yes. William Contreras is registered in the Medicare PECOS enrollment system.

Which organizations bill Medicare for William Contreras's services?

According to the CMS Revalidation Reassignment List (October 2026 release), William Contreras reassigns Medicare benefits to 2 organizations: Emergency And Acute Care Medical Corporation (San Diego, CA) and Sharp Rees-Stealy Medical Group, Inc (San Diego, CA). Each reassignment is filed with Medicare on form CMS-855R, signed by both the clinician and the organization, and lets the organization bill Medicare and receive payment for William Contreras's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.

When was this NPI record last updated?

The NPPES record for William Contreras was last updated on November 21, 2012. 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.