ROBERT R WILLIAMS M.D.
NPI 1184682254
Internal Medicine in Tracy, CA

Q: What is Robert Williams's NPI number?

The NPI number for Robert Williams is 1184682254. It was assigned to this individual provider in the NPPES registry on May 1, 2006.

Q: What is Robert Williams's specialty?

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

Q: When was this NPI record last updated?

The NPPES record for Robert Williams was last updated on February 25, 2011. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 15 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.

Active since May 01, 2006PECOS Enrolled

2151 W GRANT LINE RD, TRACY, CA 95377(209) 832-0535 Get Directions Write a Review

NPPES record last updated: February 25, 2011. Verified against the NPPES registry weekly; last sync: August 16, 2026.

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About Robert R Williams M.d. NPPES

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

ROBERT R WILLIAMS M.D. (NPI 1184682254) is an individual internal medicine provider in Tracy, California, licensed in California (G62642) and active in the NPI registry since May 2006. He is enrolled in Medicare PECOS.

NPPES Registry Identity

NPI1184682254

Entity TypeIndividualMale

Primary Taxonomy207R00000X

Provider Legal NameROBERT R WILLIAMSCredential: M.D.

Location Address2151 W GRANT LINE RDTracy, CA 95377-7309

Mailing Address600 Coffee RdModesto, CA 95355-4201 · (209) 524-1211

Phone(209) 832-0535

Sole ProprietorNo

Enumeration DateMay 1, 2006

Last NPPES UpdateFebruary 25, 2011

✔ NPI 1184682254 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses 2

★ Primary SpecialtyInternal MedicineAllopathic & Osteopathic Physicians

Taxonomy Code207R00000X

License✔ Licensed in CA · G62642

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.

Also ListedPediatricsTaxonomy 208000000X · License G62642 (CA)

2151 W GRANT LINE RD, Tracy, CA 95377

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Other Identifiers 4

Medicare UPINE98425CA

Medicare ID-Type Unspecified00G626420CA · Medicare Number

Medicaid00G626420CA

Medicare PIN00G626421CA

Medicare Participation & PECOS CMS

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

Medicare Enrollment Status

✔

Enrolled in Medicare (PECOS)

Robert R Williams 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 95377 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

$133.94 typical visit price

range $58.87 – $176.60

Typical copayment $33.48 (range $14.71 – $44.15)

Most-billed visit code 99204

Established Patient

$103.36 typical visit price

range $19.28 – $144.60

Typical copayment $25.84 (range $4.82 – $36.15)

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

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

Supply allowance for therapeutic continuous glucose monitor (cgm), includes all supplies and accessories, 1 month supply = 1 unit of service K0553

DME-Other DME · category DE017N

1 supplier11 claims11 services$185.29 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.

DAISY YONZON JONES DO

Pediatrics