1. Home
  2. Directory
  3. California
  4. Palo Alto
  5. Internal Medicine
  6. NPI Profile

CAROL J THOMAS MD
NPI 1861591455
Internal Medicine - Endocrinology, Diabetes & Metabolism in Palo Alto, CA

Active since September 21, 2006Opted out of Medicare · through Mar 1, 2027
1101 WELCH ROAD, SUITE C5, PALO ALTO, CA 94304(650) 326-8700(650) 853-0560 Get Directions Write a Review

NPPES record last updated: July 8, 2007. Verified against the NPPES registry weekly; last sync: August 09, 2026.

About Carol J Thomas Md NPPES

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

CAROL J THOMAS MD (NPI 1861591455) is an individual endocrinology, diabetes & metabolism provider in Palo Alto, California, licensed in California (G380670) and active in the NPI registry since September 2006. She has opted out of Medicare through March 1, 2027 and remains eligible to order and refer.

NPPES Registry Identity

NPI1861591455
Entity TypeIndividualFemale
Primary Taxonomy207RE0101X
Provider Legal NameCAROL J THOMASCredential: MD
Location Address1101 WELCH ROAD, SUITE C5Palo Alto, CA 94304
Mailing Address1101 Welch Road, Suite C5Palo Alto, CA 94304 · (650) 326-8700 · Fax (650) 853-0560
Phone(650) 326-8700
Fax(650) 853-0560
Sole ProprietorNo
Enumeration DateSeptember 21, 2006
Last NPPES UpdateJuly 8, 2007
✔ NPI 1861591455 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses

★ Primary SpecialtyInternal Medicine · Endocrinology, Diabetes & MetabolismAllopathic & Osteopathic Physicians
Taxonomy Code207RE0101X
License✔ Licensed in CA · G380670
Definition
An internist who concentrates on disorders of the internal (endocrine) glands such as the thyroid and adrenal glands. This specialist also deals with disorders such as diabetes, metabolic and nutritional disorders, obesity, pituitary diseases and menstrual and sexual problems.
1101 WELCH ROAD, Palo Alto, CA 94304
Open in Google Maps ↗

Other Identifiers 1

Medicare ID-Type Unspecified00G380670CA

Medicare Participation & PECOS CMS

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

Medicare Enrollment Status

ⓘ

Opted out of Medicare

Carol J Thomas Md has filed a Medicare opt-out affidavit. Services are provided under private contract between the provider and the patient, and are not billed to or reimbursed by Medicare. The opt-out is on file from March 1, 2013 through March 1, 2027.

Opt-Out Effective DateMarch 1, 2013
Opt-Out In Effect ThroughMarch 1, 2027Opt-out affidavits renew automatically every two years unless cancelled
Eligible to Order & Refer✔ Part B Labs & Imaging✔ Durable Medical Equipment✔ Home Health Agency✔ Power Mobility DevicesAn opted-out provider can still order and refer for Medicare patients in the categories marked above, even though their own services are not covered.

Physician Visit Costs CMS claims · ZIP area

Typical Medicare office-visit costs in the 94304 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
$156.67 typical visit price
range $70.37 – $206.04
Typical copayment $39.16 (range $17.59 – $51.51)
Most-billed visit code 99204
Established Patient
$121.77 typical visit price
range $23.96 – $169.60
Typical copayment $30.44 (range $5.99 – $42.40)
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 2

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

Blood glucose test or reagent strips for home blood glucose monitor, per 50 strips A4253
DME-Other DME · category DE017N
7 suppliers28 claims54 services$4.84 avg. paid by Medicare
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
7 suppliers76 claims76 services$185.41 avg. paid by Medicare
Dollar amounts are the average Medicare paid the supplier per service. They are not the cost to the patient.

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 Carol Thomas's NPI number?

The NPI number for Carol Thomas is 1861591455. It was assigned to this individual provider in the NPPES registry on September 21, 2006.

Where is Carol Thomas located?

Carol Thomas practices at 1101 Welch Road Suite C5, Palo Alto, CA 94304. The listed phone number is (650) 326-8700.

What is Carol Thomas's specialty?

The primary specialty registered for this NPI is Internal Medicine, specializing in Endocrinology, Diabetes & Metabolism, with taxonomy code 207RE0101X.

Is Carol Thomas enrolled in Medicare?

No. Carol Thomas has opted out of Medicare through March 1, 2027. Care is provided under private contracts, and Medicare does not pay for services furnished by providers who have opted out. The provider remains eligible to order and refer services for Medicare patients.

When was this NPI record last updated?

The NPPES record for Carol Thomas was last updated on July 8, 2007. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 19 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.