CLAIRE KATHERINE HORTON MD
NPI 1649374109
Internal Medicine in Oakland, CA

Q: What is Claire Horton's NPI number?

The NPI number for Claire Horton is 1649374109. It was assigned to this individual provider in the NPPES registry on September 12, 2006.

Q: What is Claire Horton'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 Claire Horton was last updated on December 18, 2007. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 18 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 September 12, 2006PECOS Enrolled

3451 E 12TH STREET, OAKLAND, CA 94601(510) 535-3500(510) 535-4187 Get Directions Write a Review

NPPES record last updated: December 18, 2007. Verified against the NPPES registry weekly; last sync: November 01, 2026.

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About Claire Katherine Horton Md NPPES

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

CLAIRE KATHERINE HORTON MD (NPI 1649374109) is an individual internal medicine provider in Oakland, California, licensed in California (A71387) and active in the NPI registry since September 2006. She is enrolled in Medicare PECOS.

NPPES Registry Identity

NPI1649374109

Entity TypeIndividualFemale

Primary Taxonomy207R00000X

Provider Legal NameCLAIRE KATHERINE HORTONCredential: MD

Location Address3451 E 12TH STREETOakland, CA 94601

Mailing Address1601 Fruitvale AveOakland, CA 94601-2322 · (510) 535-4000 · Fax (510) 535-4128

Phone(510) 535-3500

Fax(510) 535-4187

Sole ProprietorNo

Enumeration DateSeptember 12, 2006

Last NPPES UpdateDecember 18, 2007

✔ NPI 1649374109 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 · A71387

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.

3451 E 12TH STREET, Oakland, CA 94601

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Other Identifiers 5

Medicare UPINH29150

MedicaidFHC71021FCA

Other55-1975CA · Fqhc Medicare Part A

OtherHAP71021FCA · Fpact

OtherZZZ29799ZCA · Fqhc Medicare Part B

Medicare Participation & PECOS CMS

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

Medicare Enrollment Status

✔

Enrolled in Medicare (PECOS)

Claire Katherine Horton Md 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

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

City & County Of San Francisco

9.0 mi

Clinic/Center

901 FAIRFAX AVE STE C
San Francisco, CA 94124

Reassigned Medicare billing, California enrollment
1,573 clinicians in this Medicare group

NPI 1689536799 (628) 217-5220

University Of California Sfgh Medical Group

10 mi

Endocrinology, Diabetes & Metabolism

2540 23RD ST, 2ND FLOOR, ROOM 2110
San Francisco, CA 94143

Reassigned Medicare billing, California enrollment
637 clinicians in this Medicare group

NPI 1265407381 (415) 514-9031

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

Physician Visit Costs CMS claims · ZIP area

Typical Medicare office-visit costs in the 94601 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.

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.

Bedside drainage bag, day or night, with or without anti-reflux device, with or without tube, each A4357

DME-Orthotic Devices · category DF000N

1 supplier11 claims25 services$9.41 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 15

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

MRS. ERICA ECKROAD MASON CPNP

Nurse Practitioner (Pediatrics)